D. R. Worsnop

Loading-dependent elemental composition of α-pinene SOA particles (2009)

J. E. Shilling, Q. Chen, S. M. King, T. Rosenoern, J. H. Kroll, D. R. Worsnop, ...

The chemical composition of secondary organic aerosol (SOA) particles, formed by the dark ozonolysis of α-pinene, was characterized by a high-resolution time-of-flight aerosol mass spectrometer. The...

A case study of ozone production, nitrogen oxides, and the radical budget in Mexico City (2009)

E. C. Wood, S. C. Herndon, T. B. Onasch, J. H. Kroll, M. R. Canagaratna, C. E. Kolb, ...

Observations at a mountain-top site within the Mexico City basin are used to characterize ozone production and destruction, nitrogen oxide speciation and chemistry, and the radical budget, with an...

Interpretation of organic components from Positive Matrix Factorization of aerosol mass spectrometric data (2009)

I. M. Ulbrich, M. R. Canagaratna, Q. Zhang, D. R. Worsnop, J. L. Jimenez

The organic aerosol (OA) dataset from an Aerodyne Aerosol Mass Spectrometer (Q-AMS) collected at the Pittsburgh Air Quality Study (PAQS) in September 2002 was analyzed with Positive Matrix...

Size-resolved aerosol chemistry on Whistler Mountain, Canada with a high-resolution aerosol mass spectrometer during INTEX-B (2009)

Y. Sun, Q. Zhang, A. M. Macdonald, K. Hayden, S. M. Li, J. Liggio, ...

An Aerodyne High Resolution Time-of-Flight Aerosol Mass Spectrometer (HR-ToF-AMS) was deployed at the peak of Whistler Mountain (2182 m above sea level), British Columbia, from 19 April to 16 May...

The heterogeneous reaction of hydroxyl radicals with sub-micron squalane particles: a model system for understanding the oxidative aging of ambient aerosols (2009)

J. D. Smith, J. H. Kroll, C. D. Cappa, D. L. Che, C. L. Liu, M. Ahmed, ...

The heterogeneous reaction of OH radicals with sub-micron squalane particles, in the presence of O₂, is used as a model system to explore the fundamental chemical mechanisms...

Emission and chemistry of organic carbon in the gas and aerosol phase at a sub-urban site near Mexico City in March 2006 during the MILAGRO study (2009)

D. Welsh-Bon, C. Warneke, W. C. Kuster, L. Alexander, A. K. Baker, ...

Volatile organic compounds (VOCs) and carbonaceous aerosol were measured at a sub-urban site near Mexico City in March of 2006 during the MILAGRO study (Megacity Initiative: Local and Global Research...

Contributions from DMS and ship emissions to CCN observed over the summertime North Pacific (2009)

L. Phinney, W. R. Leaitch, U. Lohmann, N. C. Shantz, D. R. Worsnop

Measurements of cloud condensation nuclei (CCN) made over the remote North Pacific Ocean in July 2002 are analysed with concurrent measurements of aerosol number, mass and composition. Overall the...

Chemically-resolved aerosol volatility measurements from two megacity field studies (2009)

J. A. Huffman, K. S. Docherty, A. C. Aiken, M. J. Cubison, I. M. Ulbrich, P. F. DeCarlo, ...

The volatilities of different chemical species in ambient aerosols are important but remain poorly characterized. The coupling of a recently developed rapid temperature-stepping thermodenuder (TD,...

The heterogeneous reaction of hydroxyl radicals with sub-micron squalane particles: a model system for understanding the oxidative aging of ambient aerosols (2009)

J. D. Smith, J. H. Kroll, C. D. Cappa, D. L. Che, C. L. Liu, M. Ahmed, ...

The heterogeneous reaction of OH radicals with sub-micron squalane particles, in the presence of O₂, is used as a model system to explore the fundamental chemical mechanisms...

Evaluating simulated primary anthropogenic and biomass burning organic aerosols during MILAGRO: implications for assessing treatments of secondary organic aerosols (2009)

J. D. Fast, A. C. Aiken, J. Allan, L. Alexander, T. Campos, M. R. Canagaratna, ...

Simulated primary organic aerosols (POA), as well as other particulates and trace gases, in the vicinity of Mexico City are evaluated using measurements collected during the 2006 Megacity Initiative:...

New particle formation from the oxidation of direct emissions of pine seedlings (2009)

L. Q. Hao, P. Yli-Pirilä, P. Tiitta, S. Romakkaniemi, P. Vaattovaara, M. K. Kajos, ...

Measurements of particle formation following the gas phase oxidation of volatile organic compounds (VOCs) emitted by Scots pine (<i>Pinus sylvestris L.</i>) seedlings are reported....

Mexico City aerosol analysis during MILAGRO using high resolution aerosol mass spectrometry at the urban supersite (T0) – Part 1: Fine particle composition and organic source apportionment (2009)

A. C. Aiken, D. Salcedo, M. J. Cubison, J. A. Huffman, P. F. DeCarlo, I. M. Ulbrich, ...

Submicron aerosol was analyzed during the MILAGRO field campaign in March 2006 at the T0 urban supersite in Mexico City with a High-Resolution Time-of-Flight Aerosol Mass Spectrometer (HR-ToF-AMS)...

Evaluating simulated primary anthropogenic and biomass burning organic aerosols during MILAGRO: implications for assessing treatments of secondary organic aerosols (2009)

J. Fast, A. C. Aiken, J. Allan, L. Alexander, T. Campos, M. R. Canagaratna, ...

Simulated primary organic aerosols (POA), as well as other particulates and trace gases, in the vicinity of Mexico City are evaluated using measurements collected during the 2006 Megacity Initiative:...

Mexico City aerosol analysis during MILAGRO using high resolution aerosol mass spectrometry at the urban supersite (T0) – Part 1: Fine particle composition and organic source apportionment (2009)

A. C. Aiken, D. Salcedo, M. J. Cubison, J. A. Huffman, P. F. DeCarlo, I. M. Ulbrich, ...

Submicron aerosol was analyzed during the MILAGRO field campaign in March 2006 at the T0 urban supersite in Mexico City with a High-Resolution Time-of-Flight Aerosol Mass Spectrometer (HR-ToF-AMS)...

Chemically-resolved aerosol volatility measurements from two megacity field studies (2009)

J. A. Huffman, K. S. Docherty, A. C. Aiken, M. J. Cubison, I. M. Ulbrich, P. F. DeCarlo, ...

The volatilities of different chemical species in ambient aerosols are important but remain poorly characterized. The coupling of a recently developed rapid temperature-stepping thermodenuder (TD,...

Single particle characterization using a light scattering module coupled to a time-of-flight aerosol mass spectrometer (2009)

E. S. Cross, T. B. Onasch, M. Canagaratna, J. T. Jayne, J. Kimmel, ...

We present the first single particle results obtained with an Aerodyne time-of-flight aerosol mass spectrometer coupled with a light scattering module (LS-ToF-AMS). The instrument was deployed at the...

New particle formation from the oxidation of direct emissions of pine seedlings (2009)

L. Q. Hao, P. Yli-Pirilä, P. Tiitta, S. Romakkaniemi, P. Vaattovaara, M. K. Kajos, ...

Measurements of particle formation following the gas phase oxidation of volatile organic compounds (VOCs) emitted by Scots pine (<i>Pinus sylvestris</i> L.) seedlings are reported....

Physicochemical properties and origin of organic groups detected in boreal forest using an aerosol mass spectrometer (2009)

T. Raatikainen, P. Vaattovaara, P. Tiitta, P. Miettinen, J. Rautiainen, M. Ehn, ...

An Aerodyne quadrupole aerosol mass spectrometer (Q-AMS) was deployed in Hyytiälä, a forested rural measurement site in southern Finland, during a 2-week measurement campaign in spring 2005. Q-AMS...

Total observed organic carbon (TOOC) in the atmosphere: a synthesis of North American observations (2008)

Heald, C. L., Goldstein, A. H., Allan, J. D., Aiken, A. C., Apel, E., Atlas, E. L., ...

Measurements of organic carbon compounds in both the gas and particle phases made upwind, over and downwind of North America are synthesized to examine the total observed organic carbon (TOOC) in the...

Interpretation of organic components from positive matrix factorization of aerosol mass spectrometric data (2008)

Ulbrich, I. M., Canagaratna, M. R., Zhang, Q., Worsnop, D. R., Jimenez, J. L.

The organic aerosol (OA) dataset from an Aerodyne Aerosol Mass Spectrometer (Q-AMS) collected at the Pittsburgh Air Quality Study in September 2002 was analyzed for components with Positive Matrix...

CCN activation experiments with adipic acid: effect of particle phase and adipic acid coatings on soluble and insoluble particles (2008)

Hings, S. S., Wrobel, W. C., Cross, E. S., Worsnop, D. R., Davidovits, P., Onasch, T. B.

Slightly soluble atmospherically relevant organic compounds, such as adipic acid, may influence particle CCN activity and therefore cloud formation. The 11 published experimental studies on the CCN...

The role of VOC oxidation products in continental new particle formation (2008)

Laaksonen, A., Kulmala, M., O'Dowd, C. D., Joutsensaari, J., Vaattovaara, P., Mikkonen, S., ...

Aerosol physical and chemical properties and trace gas concentrations were measured during the QUEST field campaign in March?April 2003, in Hyytiälä, Finland. Our aim was to understand the role of...

Particle mass yield in secondary organic aerosol formed by the dark ozonolysis of ?-pinene (2008)

Shilling, J. E., Chen, Q., King, S. M., Rosenoern, T., Kroll, J. H., Worsnop, D. R., ...

The yield of particle mass in secondary organic aerosol (SOA) formed by dark ozonolysis was measured for 0.3?22.8 ppbv of reacted ?-pinene. Most experiments were conducted using a continuous-flow...

Total observed organic carbon (TOOC) in the atmosphere: a synthesis of North American observations (2008)

Heald, C. L., Goldstein, A. H., Allan, J. D., Aiken, A. C., Apel, E., Atlas, E. L., ...

Measurements of organic carbon compounds in both the gas and particle phases made upwind, over and downwind of North America are synthesized to examine the total observed organic carbon (TOOC) in the...

Interpretation of organic components from positive matrix factorization of aerosol mass spectrometric data (2008)

Ulbrich, I. M., Canagaratna, M. R., Zhang, Q., Worsnop, D. R., Jimenez, J. L.

The organic aerosol (OA) dataset from an Aerodyne Aerosol Mass Spectrometer (Q-AMS) collected at the Pittsburgh Air Quality Study in September 2002 was analyzed for components with Positive Matrix...

CCN activation experiments with adipic acid: effect of particle phase and adipic acid coatings on soluble and insoluble particles (2008)

Hings, S. S., Wrobel, W. C., Cross, E. S., Worsnop, D. R., Davidovits, P., Onasch, T. B.

Slightly soluble atmospherically relevant organic compounds, such as adipic acid, may influence particle CCN activity and therefore cloud formation. The 11 published experimental studies on the CCN...

The role of VOC oxidation products in continental new particle formation (2008)

Laaksonen, A., Kulmala, M., O'Dowd, C. D., Joutsensaari, J., Vaattovaara, P., Mikkonen, S., ...

Aerosol physical and chemical properties and trace gas concentrations were measured during the QUEST field campaign in March?April 2003, in Hyytiälä, Finland. Our aim was to understand the role of...

Particle mass yield in secondary organic aerosol formed by the dark ozonolysis of ?-pinene (2008)

Shilling, J. E., Chen, Q., King, S. M., Rosenoern, T., Kroll, J. H., Worsnop, D. R., ...

The yield of particle mass in secondary organic aerosol (SOA) formed by dark ozonolysis was measured for 0.3?22.8 ppbv of reacted ?-pinene. Most experiments were conducted using a continuous-flow...

Total observed organic carbon (TOOC) in the atmosphere: a synthesis of North American observations (2008)

Heald, C. L., Goldstein, A. H., Allan, J. D., Aiken, A. C., Apel, E., Atlas, E. L., ...

Measurements of organic carbon compounds in both the gas and particle phases made upwind, over and downwind of North America are synthesized to examine the total observed organic carbon (TOOC) in the...

The role of VOC oxidation products in continental new particle formation (2008)

Laaksonen, A., Kulmala, M., O'Dowd, C. D., Joutsensaari, J., Vaattovaara, P., Mikkonen, S., ...

Total observed organic carbon (TOOC) in the atmosphere: a synthesis of North American observations (2008)

C. L. Heald, A. H. Goldstein, J. D. Allan, A. C. Aiken, E. Apel, E. L. Atlas, ...

Measurements of organic carbon compounds in both the gas and particle phases made upwind, over and downwind of North America are synthesized to examine the total observed organic carbon (TOOC) in the...

Particle mass yield in secondary organic aerosol formed by the dark ozonolysis of α-pinene (2008)

J. E. Shilling, Q. Chen, S. M. King, T. Rosenoern, J. H. Kroll, D. R. Worsnop, ...

The yield of particle mass in secondary organic aerosol (SOA) formed by dark ozonolysis was measured for 0.3–22.8 ppbv of reacted α-pinene. Most experiments were conducted using a...

The role of VOC oxidation products in continental new particle formation (2008)

A. Laaksonen, M. Kulmala, C. D. O'Dowd, J. Joutsensaari, P. Vaattovaara, S. Mikkonen, ...

Aerosol physical and chemical properties and trace gas concentrations were measured during the QUEST field campaign in March–April 2003, in Hyytiälä, Finland. Our aim was to understand the...

CCN activation experiments with adipic acid: effect of particle phase and adipic acid coatings on soluble and insoluble particles (2008)

S. S. Hings, W. C. Wrobel, E. S. Cross, D. R. Worsnop, P. Davidovits, T. B. Onasch

Slightly soluble atmospherically relevant organic compounds may influence particle CCN activity and therefore cloud formation. Adipic acid is a frequently employed surrogate for such slightly soluble...

Corrigendum to "The relative importance of competing pathways for the formation of high-molecular-weight peroxides in the ozonolysis of organic aerosol particles" published in Atmos. Chem. Phys., 6, 4851–4866, 2006 (2008)

M. Mochida, Y. Katrib, J. T. Jayne, D. R. Worsnop, S. T. Martin

No abstract available.

CCN activation experiments with adipic acid: effect of particle phase and adipic acid coatings on soluble and insoluble particles (2008)

S. S. Hings, W. C. Wrobel, E. S. Cross, D. R. Worsnop, P. Davidovits, T. B. Onasch

Slightly soluble atmospherically relevant organic compounds, such as adipic acid, may influence particle CCN activity and therefore cloud formation. The 11 published experimental studies on the CCN...

Interpretation of organic components from positive matrix factorization of aerosol mass spectrometric data (2008)

I. M. Ulbrich, M. R. Canagaratna, Q. Zhang, D. R. Worsnop, J. L. Jimenez

The organic aerosol (OA) dataset from an Aerodyne Aerosol Mass Spectrometer (Q-AMS) collected at the Pittsburgh Air Quality Study in September 2002 was analyzed for components with Positive Matrix...

Loading-dependent elemental composition of α-pinene SOA particles (2008)

J. E. Shilling, Q. Chen, S. M. King, T. Rosenoern, J. H. Kroll, D. R. Worsnop, ...

The chemical composition of secondary organic aerosol (SOA) particles, formed by the dark ozonolysis of α-pinene, was characterized by a high-resolution time-of-flight aerosol mass spectrometer. The...

Ozone production, nitrogen oxides, and radical budgets in Mexico City: observations from Pico de Tres Padres (2008)

E. C. Wood, S. C. Herndon, T. B. Onasch, J. H. Kroll, M. R. Canagaratna, C. E. Kolb, ...

Observations at a mountain-top site within the Mexico City basin are used to characterize ozone production and destruction, the nitrogen oxide budget, and the radical budget during the MILAGRO...

Emission and chemistry of organic carbon in the gas and aerosol phase at a sub-urban site near Mexico City in March 2006 during the MILAGRO study (2008)

D. Welsh-Bon, C. Warneke, W. C. Kuster, L. Alexander, A. K. Baker, ...

Volatile organic compounds (VOCs) and carbonaceous aerosol were measured at a sub-urban site near Mexico City in March of 2006 during the MILAGRO study (Megacity Initiative: Local and Global Research...

Single particle characterization using a light scattering module coupled to a time-of-flight aerosol mass spectrometer (2008)

E. S. Cross, T. B. Onasch, M. Canagaratna, J. T. Jayne, J. Kimmel, ...

We present the first single particle results obtained using an Aerodyne time-of-flight aerosol mass spectrometer coupled with a light scattering module (LS-ToF-AMS). The instrument was deployed at...

Loading-dependent elemental composition of α-pinene SOA particles (2008)

J. E. Shilling, Q. Chen, S. M. King, T. Rosenoern, J. H. Kroll, D. R. Worsnop, ...

The chemical composition of secondary organic aerosol (SOA) particles, formed by the dark ozonolysis of α-pinene, was characterized by a high-resolution time-of-flight aerosol mass spectrometer. The...

The role of VOC oxidation products in continental new particle formation. (2008)

Laaksonen, A., Kulmala, M., O'Dowd, C.D., Joutsensaari, J., Vaattovaara, P., Mikkonen, S., ...

Atmospheric Chemistry and Physics, 8(2008) S.2657-65

Technical Note: Use of a beam width probe in an Aerosol Mass Spectrometer to monitor particle collection efficiency in the field (2007)

D. Salcedo, T. B. Onasch, M. R. Canagaratna, K. Dzepina, J. A. Huffman, J. T. Jayne, ...

Two Aerodyne Aerosol Mass Spectrometers (Q-AMS) were deployed in Mexico City, during the Mexico City Metropolitan Area field study (MCMA-2003) from 29 March–4 May 2003 to investigate particle...

Particle mass yield in secondary organic aerosol formed by the dark ozonolysis of ?-pinene (2007)

Shilling, J. E., Chen, Q., King, S. M., Rosenoern, T., Kroll, J. H., Worsnop, D. R., ...

The yield of particle mass in secondary organic aerosol (SOA) formed by dark ozonolysis was measured for 0.3?22.8 ppbv of reacted ?-pinene. Most experiments were conducted using a continuous-flow...

The role of VOC oxidation products in continental new particle formation (2007)

Laaksonen, A., Kulmala, M., O'Dowd, C. D., Joutsensaari, J., Vaattovaara, P., Mikkonen, S., ...

Aerosol physical and chemical properties and trace gas concentrations were measured during the QUEST field campaign in March?April, 2003, in Hyytiälä, Finland. Our aim was to understand the role of...

Technical Note: Use of a beam width probe in an Aerosol Mass Spectrometer to monitor particle collection efficiency in the field (2007)

Salcedo, D., Onasch, T. B., Canagaratna, M. R., Dzepina, K., Huffman, J. A., Jayne, J. T., ...

Two Aerodyne Aerosol Mass Spectrometers (Q-AMS) were deployed in Mexico City, during the Mexico City Metropolitan Area field study (MCMA-2003) from 29 March?4 May 2003 to investigate particle...

Particle mass yield in secondary organic aerosol formed by the dark ozonolysis of ?-pinene (2007)

Shilling, J. E., Chen, Q., King, S. M., Rosenoern, T., Kroll, J. H., Worsnop, D. R., ...

The yield of particle mass in secondary organic aerosol (SOA) formed by dark ozonolysis was measured for 0.3?22.8 ppbv of reacted ?-pinene. Most experiments were conducted using a continuous-flow...

The role of VOC oxidation products in continental new particle formation (2007)

Laaksonen, A., Kulmala, M., O'Dowd, C. D., Joutsensaari, J., Vaattovaara, P., Mikkonen, S., ...

Aerosol physical and chemical properties and trace gas concentrations were measured during the QUEST field campaign in March?April, 2003, in Hyytiälä, Finland. Our aim was to understand the role of...

Technical Note: Use of a beam width probe in an Aerosol Mass Spectrometer to monitor particle collection efficiency in the field (2007)

Salcedo, D., Onasch, T. B., Canagaratna, M. R., Dzepina, K., Huffman, J. A., Jayne, J. T., ...

Two Aerodyne Aerosol Mass Spectrometers (Q-AMS) were deployed in Mexico City, during the Mexico City Metropolitan Area field study (MCMA-2003) from 29 March?4 May 2003 to investigate particle...

Technical Note: Use of a beam width probe in an Aerosol Mass Spectrometer to monitor particle collection efficiency in the field (2007)

Salcedo, D., Onasch, T. B., Canagaratna, M. R., Dzepina, K., Huffman, J. A., Jayne, J. T., ...

Chemical and microphysical characterization of ambient aerosols with the aerodyne aerosol mass spectrometer (2007)

Canagaratna, M. R., Jayne, J. T., Jimenez, J. L., Allan, J. D., Alfarra, M. R., Zhang, Q., ...

Ubiquity and dominance of oxygenated species in organic aerosols in anthropogenically-influenced Northern Hemisphere midlatitudes (2007)

Zhang, Q., Jimenez, J. L., Canagaratna, M. R., Allan, J. D., Coe, H., Ulbrich, I., ...

The role of VOC oxidation products in continental new particle formation (2007)

A. Laaksonen, M. Kulmala, C. D. O'Dowd, J. Joutsensaari, P. Vaattovaara, S. Mikkonen, ...

Aerosol physical and chemical properties and trace gas concentrations were measured during the QUEST field campaign in March–April, 2003, in Hyytiälä, Finland. Our aim was to understand the...

Particle mass yield in secondary organic aerosol formed by the dark ozonolysis of α-pinene (2007)

J. E. Shilling, Q. Chen, S. M. King, T. Rosenoern, J. H. Kroll, D. R. Worsnop, ...

The yield of particle mass in secondary organic aerosol (SOA) formed by dark ozonolysis was measured for 0.3–22.8 ppbv of reacted α-pinene. Most experiments were conducted using a...

Size and composition measurements of background aerosol and new particle growth in a Finnish forest during QUEST 2 using an Aerodyne Aerosol Mass Spectrometer (2006)

J. D. Allan, M. R. Alfarra, K. N. Bower, H. Coe, J. T. Jayne, D. R. Worsnop, ...

The study of the growth of nucleation-mode particles is important, as this prevents their loss through diffusion and allows them to reach sizes where they may become effective cloud condensation...

Characterization of ambient aerosols in Mexico City during the MCMA-2003 campaign with Aerosol Mass Spectrometry: results from the CENICA Supersite (2006)

D. Salcedo, T. B. Onasch, K. Dzepina, M. R. Canagaratna, Q. Zhang, J. A. Huffman, ...

An Aerodyne Aerosol Mass Spectrometer (AMS) was deployed at the CENICA Supersite, during the Mexico City Metropolitan Area field study (MCMA-2003) from 31 March-4 May 2003 to investigate particle...

A mass spectrometric study of secondary organic aerosols formed from the photooxidation of anthropogenic and biogenic precursors in a reaction chamber (2006)

M. R. Alfarra, D. Paulsen, M. Gysel, A. A. Garforth, J. Dommen, ...

An Aerodyne Aerosol Mass Spectrometer (AMS) has been utilised to provide on-line measurements of the mass spectral signatures and mass size distributions of the oxidation products resulting from...

Cluster Analysis of the Organic Peaks in Bulk Mass Spectra Obtained During the 2002 New England Air Quality Study with an Aerodyne Aerosol Mass Spectrometer (2006)

C. Marcolli, M. R. Canagaratna, D. R. Worsnop, R. Bahreini, C. Warneke, ...

We applied hierarchical cluster analysis to an Aerodyne aerosol mass spectrometer (AMS) bulk mass spectral dataset collected aboard the NOAA research vessel R. H. Brown during the 2002 New England...

Implementation of a Markov Chain Monte Carlo Method to inorganic aerosol modeling of observations from the MCMA-2003 Campaign. Part II: Model application to the CENICA, Pedregal and Santa Ana sites (2006)

San Martini, F. M., Dunlea, E. J., Volkamer, R., Onasch, T. B., Jayne, J. T., Canagaratna, M. R., ...

A Markov Chain Monte Carlo model for integrating the observations of inorganic species with a thermodynamic equilibrium model was presented in Part I of this series. Using observations taken at three...

Implementation of a Markov Chain Monte Carlo Method to inorganic aerosol modeling of observations from the MCMA-2003 Campaign. Part I: Model description and application to the La Merced Site (2006)

San Martini, F. M., Dunlea, E. J., Grutter, M., Onasch, T. B., Jayne, J. T., Canagaratna, M. R., ...

The equilibrium inorganic aerosol model ISORROPIA was embedded in a Markov Chain Monte Carlo algorithm to produce a powerful tool to analyze aerosol data and predict gas phase concentrations where...

A mass spectrometric study of secondary organic aerosols formed from the photooxidation of anthropogenic and biogenic precursors in a reaction chamber (2006)

Alfarra, M. R., Paulsen, D., Gysel, M., Garforth, A. A., Dommen, J., Prévôt, A. S. H., ...

An Aerodyne Aerosol Mass Spectrometer (AMS) has been utilised to provide on-line measurements of the mass spectral signatures and mass size distributions of the oxidation products resulting from...

The relative importance of competing pathways for the formation of high-molecular-weight peroxides in the ozonolysis of organic aerosol particles (2006)

Mochida, M., Katrib, Y., Jayne, J. T., Worsnop, D. R., Martin, S. T.

High-molecular-weight (HMW) organic compounds are an important component of atmospheric particles, although their origins, possibly including in situ formation pathways, remain incompletely...

Cluster analysis of the organic peaks in bulk mass spectra obtained during the 2002 New England Air Quality Study with an Aerodyne aerosol mass spectrometer (2006)

Marcolli, C., Canagaratna, M. R., Worsnop, D. R., Bahreini, R., De Gouw, J. A., Warneke, C., ...

We applied hierarchical cluster analysis to an Aerodyne aerosol mass spectrometer (AMS) bulk mass spectral dataset collected aboard the NOAA research vessel Ronald H. Brown during the 2002 New...

Implementation of a Markov Chain Monte Carlo method to inorganic aerosol modeling of observations from the MCMA-2003 campaign ? Part II: Model application to the CENICA, Pedregal and Santa Ana sites (2006)

San Martini, F.M., Dunlea, E.J., Volkamer, R., Onasch, T.B., Jayne, J.T., Canagaratna, M.R., ...

A Markov Chain Monte Carlo model for integrating the observations of inorganic species with a thermodynamic equilibrium model was presented in Part I of this series. Using observations taken at three...

Implementation of a Markov Chain Monte Carlo method to inorganic aerosol modeling of observations from the MCMA-2003 campaign ? Part I: Model description and application to the La Merced site (2006)

San Martini, F.M., Dunlea, E.J., Grutter, M., Onasch, T.B., Jayne, J.T., Canagaratna, M.R., ...

The equilibrium inorganic aerosol model ISORROPIA was embedded in a Markov Chain Monte Carlo algorithm to develop a powerful tool to analyze aerosol data and predict gas phase concentrations where...

The relative importance of competing pathways for the formation of high-molecular-weight peroxides in the ozonolysis of organic aerosol particles (2006)

Mochida, M., Katrib, Y., Jayne, J.T., Worsnop, D.R., Martin, S.T.

High-molecular-weight (HMW) organic compounds are an important component of atmospheric particles, although their origins, possibly including in situ formation pathways, remain incompletely...

Cluster Analysis of the Organic Peaks in Bulk Mass Spectra Obtained During the 2002 New England Air Quality Study with an Aerodyne Aerosol Mass Spectrometer (2006)

Marcolli, C., Canagaratna, M. R., Worsnop, D. R., Bahreini, R., De Gouw, J. A., Warneke, C., ...

We applied hierarchical cluster analysis to an Aerodyne aerosol mass spectrometer (AMS) bulk mass spectral dataset collected aboard the NOAA research vessel R. H. Brown during the 2002 New England...

A mass spectrometric study of secondary organic aerosols formed from the photooxidation of anthropogenic and biogenic precursors in a reaction chamber (2006)

Alfarra, M. R., Paulsen, D., Gysel, M., Garforth, A. A., Dommen, J., Prévôt, A. S. H., ...

An Aerodyne Aerosol Mass Spectrometer (AMS) has been utilised to provide on-line measurements of the mass spectral signatures and mass size distributions of the oxidation products resulting from...

Characterization of ambient aerosols in Mexico City during the MCMA-2003 campaign with Aerosol Mass Spectrometry: results from the CENICA Supersite (2006)

Salcedo, D., Onasch, T. B., Dzepina, K., Canagaratna, M. R., Zhang, Q., Huffman, J. A., ...

An Aerodyne Aerosol Mass Spectrometer (AMS) was deployed at the CENICA Supersite, during the Mexico City Metropolitan Area field study (MCMA-2003) from 31 March-4 May 2003 to investigate particle...

Size and composition measurements of background aerosol and new particle growth in a Finnish forest during QUEST 2 using an Aerodyne Aerosol Mass Spectrometer (2006)

Allan, J. D., Alfarra, M. R., Bower, K. N., Coe, H., Jayne, J. T., Worsnop, D. R., ...

The study of the growth of nucleation-mode particles is important, as this prevents their loss through diffusion and allows them to reach sizes where they may become effective cloud condensation...

Implementation of a Markov Chain Monte Carlo Method to inorganic aerosol modeling of observations from the MCMA-2003 Campaign. Part II: Model application to the CENICA, Pedregal and Santa Ana sites (2006)

San Martini, F. M., Dunlea, E. J., Volkamer, R., Onasch, T. B., Jayne, J. T., Canagaratna, M. R., ...

A Markov Chain Monte Carlo model for integrating the observations of inorganic species with a thermodynamic equilibrium model was presented in Part I of this series. Using observations taken at three...

Implementation of a Markov Chain Monte Carlo Method to inorganic aerosol modeling of observations from the MCMA-2003 Campaign. Part I: Model description and application to the La Merced Site (2006)

San Martini, F. M., Dunlea, E. J., Grutter, M., Onasch, T. B., Jayne, J. T., Canagaratna, M. R., ...

The equilibrium inorganic aerosol model ISORROPIA was embedded in a Markov Chain Monte Carlo algorithm to produce a powerful tool to analyze aerosol data and predict gas phase concentrations where...

A mass spectrometric study of secondary organic aerosols formed from the photooxidation of anthropogenic and biogenic precursors in a reaction chamber (2006)

Alfarra, M. R., Paulsen, D., Gysel, M., Garforth, A. A., Dommen, J., Prévôt, A. S. H., ...

An Aerodyne Aerosol Mass Spectrometer (AMS) has been utilised to provide on-line measurements of the mass spectral signatures and mass size distributions of the oxidation products resulting from...

The relative importance of competing pathways for the formation of high-molecular-weight peroxides in the ozonolysis of organic aerosol particles (2006)

Mochida, M., Katrib, Y., Jayne, J. T., Worsnop, D. R., Martin, S. T.

High-molecular-weight (HMW) organic compounds are an important component of atmospheric particles, although their origins, possibly including in situ formation pathways, remain incompletely...

Cluster analysis of the organic peaks in bulk mass spectra obtained during the 2002 New England Air Quality Study with an Aerodyne aerosol mass spectrometer (2006)

Marcolli, C., Canagaratna, M. R., Worsnop, D. R., Bahreini, R., De Gouw, J. A., Warneke, C., ...

We applied hierarchical cluster analysis to an Aerodyne aerosol mass spectrometer (AMS) bulk mass spectral dataset collected aboard the NOAA research vessel Ronald H. Brown during the 2002 New...

Implementation of a Markov Chain Monte Carlo method to inorganic aerosol modeling of observations from the MCMA-2003 campaign ? Part II: Model application to the CENICA, Pedregal and Santa Ana sites (2006)

San Martini, F.M., Dunlea, E.J., Volkamer, R., Onasch, T.B., Jayne, J.T., Canagaratna, M.R., ...

A Markov Chain Monte Carlo model for integrating the observations of inorganic species with a thermodynamic equilibrium model was presented in Part I of this series. Using observations taken at three...

Implementation of a Markov Chain Monte Carlo method to inorganic aerosol modeling of observations from the MCMA-2003 campaign ? Part I: Model description and application to the La Merced site (2006)

San Martini, F.M., Dunlea, E.J., Grutter, M., Onasch, T.B., Jayne, J.T., Canagaratna, M.R., ...

The equilibrium inorganic aerosol model ISORROPIA was embedded in a Markov Chain Monte Carlo algorithm to develop a powerful tool to analyze aerosol data and predict gas phase concentrations where...

The relative importance of competing pathways for the formation of high-molecular-weight peroxides in the ozonolysis of organic aerosol particles (2006)

Mochida, M., Katrib, Y., Jayne, J.T., Worsnop, D.R., Martin, S.T.

High-molecular-weight (HMW) organic compounds are an important component of atmospheric particles, although their origins, possibly including in situ formation pathways, remain incompletely...

Cluster Analysis of the Organic Peaks in Bulk Mass Spectra Obtained During the 2002 New England Air Quality Study with an Aerodyne Aerosol Mass Spectrometer (2006)

Marcolli, C., Canagaratna, M. R., Worsnop, D. R., Bahreini, R., De Gouw, J. A., Warneke, C., ...

We applied hierarchical cluster analysis to an Aerodyne aerosol mass spectrometer (AMS) bulk mass spectral dataset collected aboard the NOAA research vessel R. H. Brown during the 2002 New England...

A mass spectrometric study of secondary organic aerosols formed from the photooxidation of anthropogenic and biogenic precursors in a reaction chamber (2006)

Alfarra, M. R., Paulsen, D., Gysel, M., Garforth, A. A., Dommen, J., Prévôt, A. S. H., ...

An Aerodyne Aerosol Mass Spectrometer (AMS) has been utilised to provide on-line measurements of the mass spectral signatures and mass size distributions of the oxidation products resulting from...

Characterization of ambient aerosols in Mexico City during the MCMA-2003 campaign with Aerosol Mass Spectrometry: results from the CENICA Supersite (2006)

Salcedo, D., Onasch, T. B., Dzepina, K., Canagaratna, M. R., Zhang, Q., Huffman, J. A., ...

An Aerodyne Aerosol Mass Spectrometer (AMS) was deployed at the CENICA Supersite, during the Mexico City Metropolitan Area field study (MCMA-2003) from 31 March-4 May 2003 to investigate particle...

Size and composition measurements of background aerosol and new particle growth in a Finnish forest during QUEST 2 using an Aerodyne Aerosol Mass Spectrometer (2006)

Allan, J. D., Alfarra, M. R., Bower, K. N., Coe, H., Jayne, J. T., Worsnop, D. R., ...

The study of the growth of nucleation-mode particles is important, as this prevents their loss through diffusion and allows them to reach sizes where they may become effective cloud condensation...

Size-selective nonrefractory ambient aerosol measurements during the Particulate Matter Technology Assessment and Characterization Study - New York 2004 Winter Intensive in New York City (2006)

Weimer, S., Drewnick, F., Hogrefe, O., Schwab, J. J., Rhoads, K., Orsini, D., ...

2002 New England Air Quality Study with (2006)

C. Marcolli, M. R. Canagaratna, D. R. Worsnop, R. Bahreini, C. Warneke, ...

Cluster analysis of the organic peaks in bulk mass spectra obtained during the

under a Creative Commons License. Atmospheric Chemistry and Physics Cluster Analysis of the Organic Peaks in Bulk Mass Spectra Obtained During the 2002 New England Air Quality Study with an Aerodyne Aerosol Mass Spectrometer (2006)

C. Marcolli, M. R. Canagaratna, D. R. Worsnop, R. Bahreini, C. Warneke, ...

Abstract. We applied hierarchical cluster analysis to an Aerodyne aerosol mass spectrometer (AMS) bulk mass spectral dataset collected aboard the NOAA research vessel R. H. Brown during the 2002 New...

Cluster analysis of the organic peaks in bulk mass spectra obtained during the 2002 New England Air Quality Study with an Aerodyne aerosol mass spectrometer (2006)

C. Marcolli, M. R. Canagaratna, D. R. Worsnop, R. Bahreini, C. Warneke, ...

We applied hierarchical cluster analysis to an Aerodyne aerosol mass spectrometer (AMS) bulk mass spectral dataset collected aboard the NOAA research vessel Ronald H. Brown during the 2002 New...

Density changes of aerosol particles as a result of chemical reaction (2005)

Y. Katrib, S. T. Martin, Y. Rudich, P. Davidovits, J. T. Jayne, D. R. Worsnop

This paper introduces the capability to study simultaneously changes in the density, the chemical composition, the mobility diameter, the aerodynamic diameter, and the layer thickness of...

Design, modeling, optimization, and experimental tests of a particle beam width probe for the aerodyne aerosol mass spectrometer (2005)

Huffman, J. A., Jayne, J. T., Drewnick, F., Aiken, A. C., Onasch, T., Worsnop, D. R., ...

A new time-of-flight aerosol mass spectrometer (TOF-AMS) - Instrument description and first field deployment (2005)

Drewnick, F., Hings, S. S., DeCarlo, P., Jayne, J. T., Gonin, M., Fuhrer, K., ...

Characterization of ambient aerosols in Mexico City during the MCMA-2003 campaign with Aerosol Mass Spectrometry ? Part II: overview of the results at the CENICA supersite and comparison to previous studies (2005)

Salcedo, D., Dzepina, K., Onasch, T. B., Canagaratna, M. R., Jayne, J. T., Worsnop, D. R., ...

An Aerodyne Aerosol Mass Spectrometer (AMS) was deployed at the CENICA Supersite during the Mexico City Metropolitan Area field study from 31 March?4 May 2003. The AMS provides real time information...

Characterization of ambient aerosols in Mexico City during the MCMA-2003 campaign with Aerosol Mass Spectrometry ? Part I: quantification, shape-related collection efficiency, and comparison with collocated instruments (2005)

Salcedo, D., Dzepina, K., Onasch, T. B., Canagaratna, M. R., Zhang, Q., Huffman, A. RR., ...

An Aerodyne Aerosol Mass Spectrometer (AMS) was deployed at the CENICA Supersite, while another was deployed in the Aerodyne Mobile Laboratory (AML) during the Mexico City Metropolitan Area field...

Size and composition measurements of background aerosol and new particle growth in a Finnish forest during QUEST 2 using an Aerodyne Aerosol Mass Spectrometer (2005)

Allan, J. D., Alfarra, M. R., Bower, K. N., Coe, H., Jayne, J. T., Worsnop, D. R., ...

The study of the growth of nucleation-mode particles is important, as this prevents their loss through diffusion and allows them to reach sizes where they may become effective cloud condensation...

Hydrocarbon-like and oxygenated organic aerosols in Pittsburgh: insights into sources and processes of organic aerosols (2005)

Zhang, Q., Worsnop, D. R., Canagaratna, M. R.

A recently developed algorithm (Zhang et al., 2005) has been applied to deconvolve the mass spectra of organic aerosols acquired with the Aerosol Mass Spectrometer (AMS) in Pittsburgh during...

Hydrocarbon-like and oxygenated organic aerosols in Pittsburgh: insights into sources and processes of organic aerosols (2005)

Zhang, Q., Worsnop, D. R., Canagaratna, M. R., Jimenez, J. L.

A recently developed algorithm (Zhang et al., 2005) has been applied to deconvolve the mass spectra of organic aerosols acquired with the Aerosol Mass Spectrometer (AMS) in Pittsburgh during...

Density changes of aerosol particles as a result of chemical reaction (2005)

Katrib, Y., Martin, S. T., Rudich, Y., Davidovits, P., Jayne, J. T., Worsnop, D. R.

This paper introduces the capability to study simultaneously changes in the density, the chemical composition, the mobility diameter, the aerodynamic diameter, and the layer thickness of...

Characterization of ambient aerosols in Mexico City during the MCMA-2003 campaign with Aerosol Mass Spectrometry ? Part II: overview of the results at the CENICA supersite and comparison to previous studies (2005)

Salcedo, D., Dzepina, K., Onasch, T. B., Canagaratna, M. R., Jayne, J. T., Worsnop, D. R., ...

An Aerodyne Aerosol Mass Spectrometer (AMS) was deployed at the CENICA Supersite during the Mexico City Metropolitan Area field study from 31 March?4 May 2003. The AMS provides real time information...

Characterization of ambient aerosols in Mexico City during the MCMA-2003 campaign with Aerosol Mass Spectrometry ? Part I: quantification, shape-related collection efficiency, and comparison with collocated instruments (2005)

Salcedo, D., Dzepina, K., Onasch, T. B., Canagaratna, M. R., Zhang, Q., Huffman, A. RR., ...

An Aerodyne Aerosol Mass Spectrometer (AMS) was deployed at the CENICA Supersite, while another was deployed in the Aerodyne Mobile Laboratory (AML) during the Mexico City Metropolitan Area field...

Size and composition measurements of background aerosol and new particle growth in a Finnish forest during QUEST 2 using an Aerodyne Aerosol Mass Spectrometer (2005)

Allan, J. D., Alfarra, M. R., Bower, K. N., Coe, H., Jayne, J. T., Worsnop, D. R., ...

The study of the growth of nucleation-mode particles is important, as this prevents their loss through diffusion and allows them to reach sizes where they may become effective cloud condensation...

Hydrocarbon-like and oxygenated organic aerosols in Pittsburgh: insights into sources and processes of organic aerosols (2005)

Zhang, Q., Worsnop, D. R., Canagaratna, M. R.

A recently developed algorithm (Zhang et al., 2005) has been applied to deconvolve the mass spectra of organic aerosols acquired with the Aerosol Mass Spectrometer (AMS) in Pittsburgh during...

Hydrocarbon-like and oxygenated organic aerosols in Pittsburgh: insights into sources and processes of organic aerosols (2005)

Zhang, Q., Worsnop, D. R., Canagaratna, M. R., Jimenez, J. L.

A recently developed algorithm (Zhang et al., 2005) has been applied to deconvolve the mass spectra of organic aerosols acquired with the Aerosol Mass Spectrometer (AMS) in Pittsburgh during...

Density changes of aerosol particles as a result of chemical reaction (2005)

Katrib, Y., Martin, S. T., Rudich, Y., Davidovits, P., Jayne, J. T., Worsnop, D. R.

This paper introduces the capability to study simultaneously changes in the density, the chemical composition, the mobility diameter, the aerodynamic diameter, and the layer thickness of...

Characterization of ambient aerosols in Mexico City during the MCMA-2003 campaign with Aerosol Mass Spectrometry – Part I: quantification, shape-related collection efficiency, and comparison with collocated instruments (2005)

D. Salcedo, K. Dzepina, T. B. Onasch, M. R. Canagaratna, Q. Zhang, A.. R. Huffman, ...

An Aerodyne Aerosol Mass Spectrometer (AMS) was deployed at the CENICA Supersite, while another was deployed in the Aerodyne Mobile Laboratory (AML) during the Mexico City Metropolitan Area field...

Characterization of ambient aerosols in Mexico City during the MCMA-2003 campaign with Aerosol Mass Spectrometry – Part II: overview of the results at the CENICA supersite and comparison to previous studies (2005)

D. Salcedo, K. Dzepina, T. B. Onasch, M. R. Canagaratna, J. T. Jayne, D. R. Worsnop, ...

An Aerodyne Aerosol Mass Spectrometer (AMS) was deployed at the CENICA Supersite during the Mexico City Metropolitan Area field study from 31 March–4 May 2003. The AMS provides real time...

Online mass spectrometric aerosol measurements during the MINOS campaign (Crete, August 2001) (2004)

J. Schneider, S. Borrmann, A. G. Wollny, M. Bläsner, N. Mihalopoulos, K. Oikonomou, ...

Mass spectrometric analysis of volatile and semi-volatile (=non-refractory) aerosol particles have been performed during a field study in the summer Eastern Mediterranean. A size-resolved,...

Online mass spectrometric aerosol measurements during the MINOS campaign (Crete, August 2001) (2004)

Schneider, J., Borrmann, S., Wollny, A. G., Blasner, M., Mihalopoulos, N., Oikonomou, K., ...

Chase Studies of Particulate Emissions from in-use New York City Vehicles (2004)

Canagaratna, M. R., Jayne, J. T., Ghertner, D. A., Herndon, S., Shi, Q., Jimenez, J. L., ...

Measurement of Ambient Aerosol Composition during the PMTACS-NY 2001 using an Aerosol Mass Spectrometer. Part II: Chemically Speciated Mass Distributions (2004)

Drewnick, F., Jayne, J. T., Canagaratna, M., Worsnop, D. R., Demerjian, K. L.

Measurement of Ambient Aerosol Composition during the PMTACS-NY 2001 using an Aerosol Mass Spectrometer. Part I: Mass Concentrations (2004)

Drewnick, F., Schwab, J. J., Jayne, J. T., Worsnop, D. R., Demerjian, K. L.

Density changes of aerosol particles as a result of chemical reaction (2004)

Katrib, Y., Martin, S. T., Rudich, Y., Davidovits, P., Jayne, J. T., Worsnop, D. R.

This paper introduces the capability to study simultaneously changes in the density, the chemical composition, the mobility diameter, the aerodynamic diameter, and the layer thickness of...

Density changes of aerosol particles as a result of chemical reaction (2004)

Katrib, Y., Martin, S. T., Rudich, Y., Davidovits, P., Jayne, J. T., Worsnop, D. R.

This paper introduces the capability to study simultaneously changes in the density, the chemical composition, the mobility diameter, the aerodynamic diameter, and the layer thickness of...

Online mass spectrometric aerosol measurements during the MINOS campaign (Crete, August 2001) (2004)

Schneider, J., Borrmann, S., Wollny, A. G., Bläsner, M., Mihalopoulos, N., Oikonomou, K., ...

Mass spectrometric analysis of volatile and semi-volatile (=non-refractory) aerosol particles have been performed during a field study in the summer Eastern Mediterranean. A size-resolved,...

Online mass spectrometric aerosol measurements during the MINOS campaign (Crete, August 2001) (2004)

Schneider, J., Borrmann, S., Wollny, A. G., Bläsner, M., Mihalopoulos, N., Oikonomou, K., ...

Mass spectrometric analysis of volatile and semi-volatile (=non-refractory) aerosol particles have been performed during a field study in the summer Eastern Mediterranean. A size-resolved,...

Density changes of aerosol particles as a result of chemical reaction (2004)

Y. Katrib, S. T. Martin, Y. Rudich, P. Davidovits, J. T. Jayne, D. R. Worsnop

This paper introduces the capability to study simultaneously changes in the density, the chemical composition, the mobility diameter, the aerodynamic diameter, and the layer thickness of...

Online mass spectrometric aerosol measurements during the MINOS campaign (Crete, August 2001) (2003)

Schneider, J., Borrmann, S., Wollny, A. G., Bläsner, M., Mihalopoulos, N., Oikonomou, K., ...

Mass spectrometric analysis of volatile and semi-volatile (= non-refractory) aerosol particles have been performed during a field study in the summer Eastern Mediterranean. A size-resolved,...

Online mass spectrometric aerosol measurements during the MINOS campaign (Crete, August 2001) (2003)

Schneider, J., Borrmann, S., Wollny, A. G., Bläsner, M., Mihalopoulos, N., Oikonomou, K., ...

Mass spectrometric analysis of volatile and semi-volatile (= non-refractory) aerosol particles have been performed during a field study in the summer Eastern Mediterranean. A size-resolved,...

Online mass spectrometric aerosol measurements during the MINOS campaign (Crete, August 2001) (2003)

J. Schneider, S. Borrmann, A. G. Wollny, M. Bläsner, N. Mihalopoulos, K. Oikonomou, ...

Mass spectrometric analysis of volatile and semi-volatile (= non-refractory) aerosol particles have been performed during a field study in the summer Eastern Mediterranean. A size-resolved,...

PHOTOELECTRON SPECTROSCOPY OF $(H_{2}O)_{n}^{-}$ (1986)

Coe, James V., Worsnop, D. R., Bowen, K. H.

Address of Coe and Bowen: Department of Chemistry, The Johns Hopkins University, Baltimore, Maryland 21218. Address of Worsnop: Aerodyne Corporation, Billerica, MA 01821-3976.

Generation of “bastard” molecular ions from van der Waals clusters: Arn(C2Cl4)m+ ions, suspected interlopers in collection of solar neutrinos

Buelow, S. J., Worsnop, D. R., Herschbach, D. R.

Gaseous molecular ions containing argon and perchlorethylene, Arn(C2Cl4)m+ in which n ≥ 1-29 and m ≥ 1-4, are produced by electron bombardment of van der Waals clusters formed by expanding an...

Generation of “bastard” molecular ions from van der Waals clusters: Arn(C2Cl4)m+ ions, suspected interlopers in collection of solar neutrinos

Buelow, S. J., Worsnop, D. R., Herschbach, D. R.

Gaseous molecular ions containing argon and perchlorethylene, Arn(C2Cl4)m+ in which n ≥ 1-29 and m ≥ 1-4, are produced by electron bombardment of van der Waals clusters formed by expanding an...