MAPPING NORTH AMERICAN ISOPRENE EMISSIONS FROM SPACE2 (2009)
Paul I. Palmer, Daniel J. Jacob, Arlene M. Fiore, All V. Martin, Kelly Chance, Thomas P. Kurosu, ...
We present a methodology for deriving emissions of volatile organic compounds (VOC) from space-based column observations of formaldehyde (HCHO), and apply it to data from the GOME satellite...
H.: Concentrations and sources of organic carbon aerosols in the free troposphere over North (2009)
Colette L. Heald, Daniel J. Jacob, Solène Turquety, Rynda C. Hudman, Rodney J, Amy P. Sullivan, ...
Aircraft measurements of water-soluble organic carbon (WSOC) aerosol over NE North America during summer 2004 (ITCT-2K4) are simulated with a global chemical transport model (GEOS-Chem) to test our...
Arlene M. Fiore, Daniel J. Jacob, Isabelle Bey, Robert M. Yantosca, Brendan D. Field, Andrew C. Fusco, ...
Observations indicate that ozone (O3) concentrations in surface air over the United States (U.S.) in summer contain a 20-45 ppbv background contribution, presumably reflecting transport from outside...
Yang Liu, Jeremy A. Sarnat, Brent A. Coull, Petros Koutrakis, Daniel J. Jacob
Aerosol optical thickness (AOT) data derived by the Multi-angle Imaging SpectroRadiometer (MISR) from Jan 2001 to Feb 2002 were compared with AOT measurements from 16 Aerosol Robotic Network...
VARIATION OF NORTH AMERICAN ISOPRENE EMISSIONS (2009)
Paul I. Palmer, Dorian S. Abbot, Tzung-may Fu, Daniel J. Jacob, Kelly Chance, Thomas P. Kurosu, ...
Abstract. Quantifying isoprene emissions using satellite observations of formaldehyde (HCHO) column are subject to errors involving the column retrieval and the assumed relationship between HCHO...
Arlene M. Fiore, Daniel J. Jacob, Isabelle Bey, Robert M. Yantosca, Brendan D. Field, Andrew C. Fusco, ...
[1] Observations indicate that ozone (O3) concentrations in surface air over the United States in summer contain a 20–45 ppbv background contribution, presumably reflecting transport from outside...
VARIATION OF NORTH AMERICAN ISOPRENE EMISSIONS (2009)
Paul I. Palmer, Dorian S. Abbot, Tzung-may Fu, Daniel J. Jacob, Kelly Chance, Thomas P. Kurosu, ...
Abstract. Quantifying isoprene emissions using satellite observations of formaldehyde (HCHO) column are subject to errors involving the column retrieval and the assumed relationship between HCHO...
A tropospheric ozone maximum over the Middle (2009)
Qinbin Li, Daniel J. Jacob, Jennifer A. Logan, Isabelle Bey, Robert M, Hongyu Liu, ...
Abstract. The GEOS-CHEM global 3-D model of tropospheric chemistry predicts a summertime O3 maximum over the Middle East, with mean mixing ratios in the middle and upper troposphere in excess of 80...
Parvadha Suntharalingam, Daniel J. Jacob, Paul I. Palmer, Jennifer A. Logan, Robert M, Yaping Xiao, ...
We use observed CO2:CO correlations in Asian outflow from the TRACE-P aircraft campaign (February-April, 2001), together with a 3-D global chemical transport model (GEOS-CHEM), to constrain specific...
1 Global simulation of tropospheric O 3-NO x-hydrocarbon chemistry 1. Model formulation (2009)
Yuhang Wang, Daniel J. Jacob, Jennifer A. Logan
Abstract. We describe a global three-dimensional model for tropospheric O 3-NO x-hydrocarbon chemistry with synoptic-scale resolution. A suite of 15 chemical tracers, including O 3, NO x, PAN, HNO 3,...
SIMULTANEOUS INVERSION OF CO AND CO SOURCES (2009)
Paul I. Palmer, Parvadha Suntharalingam, Daniel J. Jacob, David G. Streets, Qingyan Fu, ...
Observed correlations between atmospheric concentrations of CO and CO represent potentially powerful information for improving CO surface flux estimates through coupled CO-CO inverse analyses. We...
Shiliang Wu, Loretta J. Mickley, Daniel J. Jacob, Jennifer A. Logan, Robert M, Short Title
2 Why are there large differences between models in global budgets of tropospheric ozone? 3 4
Rokjin J. Park, Daniel J. Jacob, Naresh Kumar, Robert M. Yantosca
reduction in U.S. anthropogenic emissions to achieve linear improvement of visibility in wilderness areas over the 2004-2018 period toward an endpoint of natural visibility conditions by 2064. Linear...
Export efficiency of black carbon aerosol in continental outflow: global implications (2009)
J. Park, Daniel J. Jacob, Paul I. Palmer, Antony D. Clarke, Rodney J. Weber, Mark A. Zondlo, ...
We use aircraft observations of Asian outflow from the NASA TRACE-P mission over the NW Pacific to quantify the export efficiency of black carbon (BC) aerosol during lifting to the free troposphere,...
Figure 1: Hg-Br Chemical Mechanism and Hg(0) Lifetime (2009)
Christopher D. Holmes, Daniel J. Jacob, Noelle E. Selin, Br Br, Hg Hgbr Hgbrx, Xin Yang
Current global models identify hydroxyl (OH) as the main global oxidant of Hg(0) [3], but this is questionable in light of the rapid expected decomposition of HgOH [4]. The main sink for Hg(0) is...
Linking ozone pollution and climate change: The case for controlling methane, Geophys (2009)
Arlene M. Fiore, Daniel J. Jacob, Brendan D. Field, David G. Streets, Suneeta D. Fern, Carey Jang
[1] Methane (CH4) emission controls are found to be a powerful lever for reducing both global warming and air pollution via decreases in background tropospheric ozone (O3). Reducing anthropogenic CH4...
Colette L. Heald, Daniel J. Jacob, Arlene M. Fiore, Louisa K. Emmons, John C, Merritt N. Deeter, ...
Satellite observations of carbon monoxide (CO) from the MOPITT instrument are combined with measurements from the TRACE-P aircraft mission over the northwest Pacific, and with a global 3-D chemical...
Atmospheric acetylene and its relationship with CO as an indicator (2009)
Yaping Xiao, Daniel J. Jacob, Solene Turquety
of air mass age
Arlene M. Fiore, Daniel J. Jacob, Rohit Mathur, Randall V. Martin
[1] Empirical orthogonal functions are used together with standard statistical metrics to evaluate the ability of models with different spatial resolutions to reproduce observed patterns of surface...
Shiliang Wu, Loretta J. Mickley, Daniel J. Jacob, David Rind, How Will, Anthropogenic Emissions Climate
global change affect our goals for clean air?
Atmospheric acetylene and its relationship with CO as an indicator (2009)
Yaping Xiao, Daniel J. Jacob, Solene Turquety
of air mass age
Rokjin J. Park, Daniel J. Jacob, Mian Chin, All V. Martin
Abstract. We use a global 3-D model simulation of elemental carbon (EC) and organic carbon (OC) aerosols to interpret year-round observations for 1998 at a network of 45 U.S. sites (IMPROVE) and from...
Rokjin J. Park, Daniel J. Jacob, Mian Chin, All V. Martin
Abstract. We use a global 3-D model (GEOS-CHEM) to better quantify the sources of elemental carbon (EC) and organic carbon (OC) aerosols in the United States through simulation of year-round...
Increasing background ozone in surface air over the United (2009)
Daniel J. Jacob, J. William Munger, Arlene M. Fiore
Abstract. The long-term trend of background O3 in surface air over the United States from 1980 to 1998 is examined using monthly probability distributions of daily maximum 8-hour average O3...
Summary 2. GEOS-Chem Hg Budget 4. Sensitivity Results (2009)
Christopher D. Holmes, Dan Jaffe, Xin Yang, Daniel J. Jacob, Phil Schwartzendruber, Duli Ch
During INTEX-B the DC-8 and UWB-Duchess measured vertical profiles of Hg0 over the mid-latitude ocean for the first time. In contrast to observations over land, where surface air is enriched in Hg0...
Arlene M. Fiore, Daniel J. Jacob, Isabelle Bey, Robert M. Yantosca, Brendan D. Field, Andrew C. Fusco, ...
Observations indicate that ozone (O3) concentrations in surface air over the United States (U.S.) in summer contain a 20-45 ppbv background contribution, presumably reflecting transport from outside...
Surface ozone background in the United States: Canadian and Mexican pollution influences (2009)
Huiqun Wang, Daniel J. Jacob, David G. Streets, Rokjin J. Park, Alice B. Gillil, A. Van Donkelaar
We use a global chemical transport model (GEOS-Chem) with 1 o x1 o horizontal resolution to quantify the effects of anthropogenic emissions from Canada, Mexico, and outside North America on daily...
Becky Alexander, Rokjin J. Park, Daniel J. Jacob, Sunling Gong
We use observations of the oxygen-17 excess (Δ 17 O) of sulfate in the Arctic to quantify the sulfate source from aqueous SO2 (S(IV)) oxidation by O2 catalyzed by transition metals. Due to the lack...
Qinbin Li, Daniel J. Jacob, J. William Munger, Robert M. Yantosca, David D. Parrish
Fossil fuel combustion accounts for> 50 % of the global atmospheric emission of NOx, but this source is concentrated in the polluted continental boundary layer (CBL) and only a small fraction is...
from formaldehyde column measurements by the OMI satellite sensor (2009)
Dylan B. Millet, Daniel J. Jacob, K. Folkert Boersma, Tzung-may Fu, Thomas P. Kurosu, Kelly Chance, ...
[1] Space-borne formaldehyde (HCHO) column measurements from the Ozone Monitoring Instrument (OMI), with 13 24 km 2 nadir footprint and daily global coverage, provide new constraints on the spatial...
Click Here for Full Article (2009)
Shiliang Wu, Loretta J. Mickley, Daniel J. Jacob, David Rind, David G. Streets
Effects of 2000–2050 changes in climate and emissions on global tropospheric ozone and the policy-relevant background surface ozone
Click Here for Full Article (2009)
Noelle E. Selin, Daniel J. Jacob, Robert M. Yantosca, Sarah Strode, Lyatt Jaeglé, Elsie M. Sunderl
versus preindustrial cycles and anthropogenic enrichment factors for deposition
Global budget of ethane and regional constraints on U.S. sources (2009)
Yaping Xiao, Jennifer A. Logan, Daniel J. Jacob, Rynda C. Hudman, Robert Yantosca, Donald R. Blake
[1] We use a 3-D chemical transport model (the GEOS-Chem CTM) to evaluate a global emission inventory for ethane (C2H6), with a best estimate for the global source of 13 Tg yr 1, 8.0 Tg yr 1 from...
Effects of 2000–2050 global change on ozone air quality in the United (2009)
Shiliang Wu, Loretta J. Mickley, Eric M. Leibensperger, Daniel J. Jacob, David Rind, David G
[1] We investigate the effects on U.S. ozone air quality from 2000–2050 global changes in climate and anthropogenic emissions of ozone precursors by using a global chemical transport model...
optical depths over western North America (2009)
Easan Drury, Daniel J. Jacob, Jun Wang, Kelly Chance
[1] Quantitative evaluation of chemical transport models (CTMs) with aerosol optical depth (AOD) products retrieved from satellite backscattered reflectances can be compromised by inconsistent...
implications for formation of secondary organic aerosols (2009)
Tzung-may Fu, Daniel J. Jacob, Folkard Wittrock, John P. Burrows, Mihalis Vrekoussis, Daven K. Henze
[1] We construct global budgets of atmospheric glyoxal and methylglyoxal with the goal of quantifying their potential for global secondary organic aerosol (SOA) formation via irreversible uptake by...
Shiliang Wu, Bryan N. Duncan, Daniel J. Jacob, Arlene M. Fiore, Oliver Wild
Chemical nonlinearities in relating intercontinental ozone pollution to anthropogenic emissions
Tzung-may Fu, Daniel J. Jacob, Colette L. Heald
Aqueous-phase reactive uptake of dicarbonyls as a source of organic aerosol over eastern North America
Jun Wang, Andrew A. Hoffmann, Rokjin J. Park, Daniel J. Jacob, Scot T. Martin
[1] The partitioning between solid and aqueous phases of tropospheric sulfate-ammonium particles is simulated with a global 3-D chemical transport model (CTM). The simulation explicitly accounts for...
Wu, Shiliang, Duncan, Bryan N., Jacob, Daniel J., Fiore, Arlene M., Wild, Oliver
Model studies typically estimate intercontinental influence on surface ozone by perturbing emissions from a source continent and diagnosing the ozone response in the receptor continent. Since the...
Click Here for Full Article (2008)
Christopher D. Holmes, Daniel J. Jacob, Xin Yang
Global lifetime of elemental mercury against oxidation by atomic bromine in the free troposphere
Shiliang Wu, Loretta J. Mickley, Daniel J. Jacob, David G. Streets
Effects of 2000-2050 changes in climate and emissions on global tropospheric ozone and the policy-relevant background ozone in the United States
Hong Liao, Peter J. Adams, Serena H. Chung, John H. Seinfeld, Loretta J. Mickley, Daniel J. Jacob
between tropospheric chemistry and aerosols in a unified
Click Here for Full Article (2008)
Atmospheric Acetylene, Its Relationship Co, Yaping Xiao, Daniel J. Jacob, Solene Turquety
[1] Acetylene (C2H2) and CO originating from combustion are strongly correlated in atmospheric observations, offering constraints on atmospheric dilution and chemical aging. We examine here the...
Click Here for Full Article Air-sea exchange in the global mercury cycle (2008)
Sarah A. Strode, Lyatt Jaeglé, Noelle E. Selin, Daniel J. Jacob, Rokjin J. Park, Robert M. Yantosca, ...
[1] We present results from a new global atmospheric mercury model coupled with a mixed layer slab ocean. The ocean model describes the interactions of the mixed layer with the atmosphere and deep...
Arlene M. Fiore, Daniel J. Jacob, Rohit Mathur, Randall V. Martin
and global models
Parvadha Suntharalingam, James T. R, Nir Krakauer, Jennifer A. Logan, Daniel J. Jacob
[1] Recent inverse analyses constraining carbon fluxes using atmospheric CO2 observations have assumed that the CO2 source from atmospheric oxidation of reduced carbon is released at the surface...
Tzung-may Fu, Daniel J. Jacob, Folkard Wittrock, John P. Burrows, Mihalis Vrekoussis
0305 Aerosols and particles (0345, 4801, 4906) 0315 Biosphere/atmosphere interactions (0426, 1610) 0368 Troposphere: constituent transport and chemistry We construct global budgets of atmospheric...
Colette L. Heald, Daniel J. Jacob, Rokjin J. Park, Lynn M. Russell, Barry J. Huebert, John H. Seinfeld, ...
large organic aerosol source in the free troposphere missing from
Click Here for Full Article (2008)
Paul I. Palmer, Dorian S. Abbot, Tzung-may Fu, Daniel J. Jacob, Kelly Chance, Thomas P. Kurosu, ...
Quantifying the seasonal and interannual variability of North American isoprene emissions using satellite observations of the formaldehyde column
budgets of HCN and CH 3CN: Constraints (2008)
Qinbin Li, Daniel J. Jacob, Robert M. Yantosca, Colette L. Heald, Hanwant B. Singh
A global three-dimensional model analysis of the atmospheric
continental outflow regions (2008)
Lin Zhang, Daniel J. Jacob, Kevin W. Bowman, Jennifer A. Logan, Solène Turquety, Rynda C. Hudman, ...
[1] Collocated measurements of tropospheric ozone (O3) and carbon monoxide (CO) from the Tropospheric Emission Spectrometer (TES) aboard the EOS Aura satellite provide information on O3-CO...
Yves J. Balkanski, Daniel J. Jacob, Richard Arimoto, Mark A. Kritz
USA. ABSTRACT. The atmospheric distribution of 222Rn over the north Pacific is simulated with a three-dimensional chemical tracer model using meteorological input from the NASA-GISS general...
Yang Liu, Rokjin J. Park, Daniel J. Jacob, Qinbin Li, Vasu Kilaru, Jeremy A. Sarnat
Mapping annual mean ground-level PM 2.5 concentrations using
Noelle E. Selin, Daniel J. Jacob, Rokjin J. Park, Robert M. Yantosca, Sarah Strode, Lyatt Jaeglé, ...
[1] We use a global 3-D model of atmospheric mercury (GEOS-Chem) to interpret worldwide observations of total gaseous mercury (TGM) and reactive gaseous mercury (RGM) in terms of the constraints they...
The global budget of ethane and regional constraints on U.S. sources (2008)
Yaping Xiao, Jennifer A. Logan, Daniel J. Jacob, Rynda C. Hudman, Robert Yantosca, Donald R. Blake
We use a 3-D chemical transport model (the GEOS-Chem CTM) to evaluate a global emission inventory for ethane (C2H6), with a best estimate for the global source of 13 Tg yr-1, 8.0 Tg yr-1 from fossil...
Transatlantic transport of pollution and its effects on surface ozone in Europe and (2008)
Qinbin Li, Daniel J. Jacob, Isabelle Bey, Paul I. Palmer, Bryan N. Duncan, Brendan D. Field, ...
[1] We examine the transatlantic transport of anthropogenic ozone and its impact on surface ozone in Europe and North America by using a 5-year (1993–1997) simulation with the GEOS-CHEM global...
Click Here for Full Article (2008)
Tzung-may Fu, Daniel J. Jacob, Paul I. Palmer, Kelly Chance, Yuxuan X. Wang, Barbara Barletta, ...
Space-based formaldehyde measurements as constraints on volatile organic compound emissions in east and south Asia and implications for ozone
Colette L. Heald, Daniel J. Jacob, Solène Turquety, Rynda C. Hudman, Rodney J. Weber, Amy P. Sullivan, ...
[1] Aircraft measurements of water-soluble organic carbon (WSOC) aerosol over NE North America during summer 2004 (ITCT-2K4) are simulated with a global chemical transport model (GEOS-Chem) to test...
Rokjin J. Park, Daniel J. Jacob, Mian Chin, Randall V. Martin
[1] We use a global three-dimensional model (GEOS-CHEM) to better quantify the sources of elemental carbon (EC) and organic carbon (OC) aerosols in the United States through simulation of year-round...
Paul I. Palmer, Parvadha Suntharalingam, Daniel J. Jacob, David G. Streets, Qingyan Fu, ...
[1] Observed correlations between atmospheric concentrations of CO2 and CO represent potentially powerful information for improving CO2 surface flux estimates through coupled CO2-CO inverse analyses....
Shiliang Wu, Loretta J. Mickley, Eric M. Leibensperger, Daniel J. Jacob
Effects of 2000-2050 global change on ozone air quality in the
Noelle E. Selin, Daniel J. Jacob, Robert M. Yantosca, Sarah Strode, Lyatt Jaeglé, Elsie M. Sunderland
Global 3-D land-ocean-atmosphere model for mercury: present-day vs. pre-industrial cycles and anthropogenic enrichment factors for deposition
United States and Europe (Interagency Monitoring of Protected Visual Environments (2008)
Rokjin J. Park, Daniel J. Jacob, Brendan D. Field, Robert M. Yantosca, Mian Chin
[1] We use a global three-dimensional coupled oxidant-aerosol model (GEOS-CHEM) to estimate natural and transboundary pollution influences on sulfate-nitrate-ammonium aerosol concentrations in the...
Manuel T. Lerdau, J. William Munger, Daniel J. Jacob
Striking progress has recently been made in understanding the central role of nitrogen oxide radicals, NO x, in atmospheric processes. NO x is implicated in the formation of acid rain, tropospheric...
M.: A nested grid formulation for chemical transport over Asia: Applications to (2008)
Yuxuan X. Wang, Michael B. Mcelroy, Daniel J. Jacob, Robert M. Yantosca
[1] A global three-dimensional chemical transport model (GEOS-CHEM) was modified to permit treatment of a limited spatial regime with resolution higher than that adopted for the global background....
Click Here for Full Article (2008)
Shiliang Wu, Loretta J. Mickley, Daniel J. Jacob, Jennifer A. Logan
Why are there large differences between models in global budgets of tropospheric ozone?
and Atmospheric Administration, in (2008)
K. Folkert Boersma, Daniel J. Jacob, Henk J. Eskes, Robert W. Pinder, Jun Wang, ...
tropospheric NO2 columns: observing the diurnal
Noelle E. Selin, Daniel J. Jacob
Seasonal and spatial patterns of mercury wet deposition in the United States: Constraints on the contribution from
K. Folkert Boersma, Daniel J. Jacob, Henk J. Eskes, Robert W. Pinder, Jun Wang
overpass time) offer an opportunity to examine the consistency between the two instruments under tropospheric background conditions and the effect of different observing times. For scenes with...
Paul I. Palmer, Daniel J. Jacob, Kelly Chance, All V. Martin, Thomas P. Kurosu, ...
1 Air-mass factor formulation for spectroscopic measurements from satellites: application to formaldehyde retrievals from GOME
Hongyu Liu, Daniel J. Jacob, Isabelle Bey, Robert M. Yantosca, Bryan N. Duncan, Glen W. Sachse
Abstract. The processes and sources contributing to Asian pollution outflow over the Pacific are examined with a global 3-D model analysis of CO observations from the TRACE-P aircraft mis-sion...
observations over the western Pacific (2007)
Paul I. Palmer, Daniel J. Jacob, Colette L. Heald, Robert M. Yantosca, Jennifer A. Logan, ...
for emissions of carbon monoxide from Asia using aircraft
Hongyu Liu, Daniel J. Jacob, Isabelle Bey, Robert M. Yantosca, Bryan N. Duncan, Glen W. Sachse
[1] The meteorological pathways contributing to Asian pollution outflow over the Pacific are examined with a global three-dimensional model analysis of CO observations from the Transport and Chemical...
Easan Drury, Daniel J. Jacob, Jun Wang, Kelly Chance
Improved algorithm for MODIS satellite retrievals of aerosol optical depths over land
Solène Turquety, Jennifer A. Logan, Daniel J. Jacob, Rynda C. Hudman, Fok Yan Leung, Colette L. Heald, ...
[1] The summer of 2004 was one of the largest fire seasons on record for Alaska and western Canada. We construct a daily bottom-up fire emission inventory for that season, including consideration of...
Noelle E. Selin, Daniel J. Jacob
Seasonal and spatial patterns of mercury wet deposition in the United States: North
Dylan B. Millet, Daniel J. Jacob, K. Folkert Boersma, Tzung-may Fu, Thomas P. Kurosu, Kelly Chance, ...
Spatial distribution of isoprene emissions from North America derived from formaldehyde column measurements by the OMI satellite sensor
Jun Wang, Daniel J. Jacob, Scot T. Martin, Scot T. Martin
of sulfate direct climate forcing to the hysteresis of particle
Jun Wang, Andrew A. Hoffmann, Rokjin Park, Daniel J. Jacob, Scot T, Scot T. Martin
distribution of solid and aqueous sulfate aerosols: effect of the
Rokjin J. Park, Daniel J. Jacob, Jennifer A. Logan
Fire and biofuel contributions to annual mean aerosol mass concentrations in the United States
Air-sea exchange in the global mercury cycle, Glob (2007)
Sarah A. Strode, Lyatt Jaeglé, Noelle E. Selin, Daniel J. Jacob, Rokjin J. Park, Robert M. Yantosca, ...
Abstract. We present results from a new global atmospheric mercury model coupled with a 2
Xiong Liu, Kelly Chance, Christopher E. Sioris, Thomas P. Kurosu, All V. Martin, ...
[1] We present the first directly retrieved global distribution of tropospheric column ozone from Global Ozone Monitoring Experiment (GOME) ultraviolet measurements during December 1996 to November...
Transpacific transport of Asian anthropogenic aerosols and its impact (2006)
Colette L. Heald, Daniel J. Jacob, Rokjin J. Park, Becky Alex, T. Duncan Fairlie, Robert M. Yantosca, ...
on surface air quality in the United States
Dylan B. Millet, Daniel J. Jacob, Solène Turquety, Rynda C. Hudman, Shiliang Wu, Alan Fried, ...
[1] Formaldehyde (HCHO) columns measured from space provide constraints on emissions of volatile organic compounds (VOCs). Quantitative interpretation requires characterization of errors in HCHO...
Export efficiency of black carbon aerosol in continental outflow: Global implications (2005)
Rokjin J. Park, Daniel J. Jacob, Paul I. Palmer, Antony D. Clarke, Rodney J. Weber, Mark A. Zondlo, ...
[1] We use aircraft observations of Asian outflow from the NASATransport and Chemical Evolution over the Pacific (TRACE-P) mission over the NW Pacific in March–April 2001 to estimate the export...
Global budget of methanol: Constraints from atmospheric observations (2005)
Daniel J. Jacob, Brendan D. Field, Qinbin Li, Donald R. Blake, Joost De Gouw, Carsten Warneke, ...
[1] We use a global three-dimensional model simulation of atmospheric methanol to examine the consistency between observed atmospheric concentrations and current understanding of sources and sinks....
Qinbin Li, Daniel J. Jacob, Rokjin Park, Yuxuan Wang, Colette L. Heald, Rynda Hudman, ...
[1] We examine the major outflow pathways for North American pollution to the Atlantic in summer by conducting a 4-year simulation with the GEOS-CHEM global chemical transport model, including a...
Global budget of methanol: constraints from atmospheric observations (2005)
Daniel J. Jacob, Brendan D. Field, Qinbin Li, Donald R. Blake, Joost De Gouw, Carsten Warneke, ...
We use a global 3-d chemical transport model (GEOS-CHEM) simulation of atmospheric methanol to test current understanding of sources and sinks against atmospheric observations. Global sources of...
Parvadha Suntharalingam, James T. R, Nir Krakauer, Daniel J. Jacob, Jennifer A. Logan
Recent inverse analyses constraining carbon fluxes using atmospheric CO2 observations have assumed that the CO2 source from atmospheric oxidation of reduced carbon is released at the surface rather...
Yaping Xiao, Daniel J. Jacob, James S. Wang, Jennifer A. Logan, Paul I. Palmer, Parvadha Suntharalingam, ...
[1] Aircraft observations of Asian outflow from the Transport and Chemical Evolution Over the Pacific (TRACE-P) aircraft mission over the NW Pacific (March and April 2001) show large CH4 enhancements...
Qinbin Li, Daniel J. Jacob, Rokjin Park, Yuxuan Wang, Colette L. Heald, Rynda Hudman, ...
We examine the major outflow pathways for North American pollution to the Atlantic in summer by conducting a 4-year simulation with the GEOS-CHEM global chemical transport model, including a coupled...
Yang Liu, Jeremy A. Sarnat, Brent A. Coull, Petros Koutrakis, Daniel J. Jacob
(AERONET) observations over the contiguous United States
Improved quantification of Chinese carbon fluxes using CO2/CO correlations in Asian outflow (2004)
Parvadha Suntharalingam, Daniel J. Jacob, Paul I. Palmer, Jennifer A. Logan, Robert M. Yantosca, Yaping Xiao, ...
[1] We use observed CO2:CO correlations in Asian outflow from the TRACE-P aircraft campaign (February–April 2001), together with a three-dimensional global chemical transport model (GEOS-CHEM), to...
Constraints on the sources of tropospheric ozone from 210 Pb- 7 Be-O3 correlations (2004)
Hongyu Liu, Daniel J. Jacob, Jack E. Dibb, Arlene M. Fiore, Robert M. Yantosca
[1] The 210 Pb- 7 Be-O3 relationships observed in three aircraft missions over the western Pacific (PEM-West A and B, TRACE-P) are simulated with a global three-dimensional chemical tracer model...
Impact of Asian emissions on observations at Trinidad Head, California, during ITCT 2K2 (2004)
Allen H. Goldstein, Dylan B. Millet, Megan Mckay, Lyatt Jaeglé, Larry Horowitz, Owen Cooper, ...
[1] Field measurements of a wide suite of trace gases and aerosols were carried out during April and May 2002, along with extensive chemical transport modeling, as part of the NOAA Intercontinental...
Constraints on Asian and European sources of methane from (2004)
Yaping Xiao, Daniel J. Jacob, James S. Wang, Jennifer A. Logan, Paul I. Palmer, Robert M. Yantosca, ...
1 Abstract. Aircraft observations of Asian outflow from the TRACE-P aircraft mission over the NW Pacific (March-April 2001) show large CH4 enhancements relative to background, as well as strong...
Daniel J. Jacob, James H. Crawford, Mary M. Kleb, Vickie E. Connors, Richard J. Bendura, James L. Raper, ...
The NASA Transport and Chemical Evolution over the Pacific (TRACE-P) aircraft mission was conducted in February-April 2001 over the NW Pacific to (1) characterize the Asian chemical outflow and...
Constraints on the Sources of Tropospheric Ozone (2003)
From Hongyu Liu, Hongyu Liu, Daniel J. Jacob, Jack E. Dibb, Arlene M. Fiore, Robert M. Yantosca, ...
The Be-O 3 relationships observed in three aircraft missions over the western Pacific (PEM-West A and B, TRACE-P) are simulated with a global 3-D chemical tracer model (GEOS-CHEM) driven by...
Rokjin Park Daniel, Daniel J. Jacob, Brendan D. Field, Robert M. Yantosca
We use a global 3-D coupled oxidant-aerosol model (GEOS-CHEM) to quantify natural and transboundary pollution influences on sulfate-nitrate-ammonium aerosol concentrations in the United States. This...
Eastern asian emissions of anthropogenic halocarbons deduced from aircraft concentration data (2003)
Paul I. Palmer, Daniel J. Jacob, L. J. Mickley, Donald R. Blake, Glen W. Sachse, Henry E. Fuelberg, ...
The Montreal Protocol restricts production of ozone-depleting halocarbons worldwide. Enforcement of the protocol has relied mainly on annual government statistics of production and consumption of...
Global Inventory of Nitrogen Oxide Emissions Constrained (2003)
Randall V. Martin, Daniel J. Jacob, Kelly Chance, Thomas P. Kurosu, Paul I. Palmer, ...
sions (37.7 Tg N yr #1 ) agrees closely with the GEIAbased a priori (36.4) and with the EDGAR 3.0 bottom-up inventory (36.6), but there are significant regional differences. A posteriori NO x...
Seasonal and interannual variability of North American isoprene (2003)
Emissions As Determined, Dorian S. Abbot, Paul I. Palmer, All V. Martin, Kelly V. Chance, Daniel J. Jacob, ...
this paper we further demonstrate the utility of HCHO column observations from GOME for mapping isoprene emission by examining the seasonal and interannual variability of these data over North...
Colette L. Heald, Daniel J. Jacob, Paul I. Palmer, Mathew J. Evans, Glen W. Sachse, Hanwant B. Singh, ...
Asian outflow
Paul I. Palmer, Daniel J. Jacob, Colette L. Heald, Robert M. Yantosca, Jennifer A. Logan, ...
[1] We use aircraft observations of continental outflow over the western Pacific from the Transport and Chemical Evolution over the Pacific (TRACE-P) mission (March– April 2001), in combination...
Potential of observations from the Tropospheric Emission (2003)
Spectrometer To Constrain, Kevin W. Bowman, Paul I. Palmer, John R. Worden, Daniel J. Jacob, ...
nt sources and sinks; 0365 Atmospheric Composition and Structure: Troposphere---composition and chemistry; 0368 Atmospheric Composition and Structure: Troposphere---constituent transport and...
Daniel J. Jacob, James H. Crawford, Mary M. Kleb, Vickie S. Connors, Richard J. Bendura, James L. Raper, ...
mission was conducted in February–April 2001 over the NW Pacific (1) to characterize the Asian chemical outflow and relate it quantitatively to its sources and (2) to determine its chemical...
Global and regional decreases in tropospheric oxidants from photochemical effects of aerosols (2003)
All V. Martin, Daniel J. Jacob, Robert M. Yantosca, Mian Chin, Paul Ginoux
[1] We evaluate the sensitivity of tropospheric OH, O3, and O3 precursors to photochemical effects of aerosols not usually included in global models: (1) aerosol scattering and absorption of...
Lyatt Jaeglé, Dan Jaffe, Heather U. Price, Peter Weiss-penzias, Paul I. Palmer, Mat J, ...
Abstract. Ground and airborne measurements of CO, ozone, and aerosols were obtained in the
Atmospheric budget of acetone (2002)
Daniel J. Jacob, Brendan D. Field, Emily M. Jin, Isabelle Bey, Qinbin Li, Jennifer A. Logan, ...
[1] The atmospheric budget and distribution of acetone are investigated by using a priori estimates of sources and sinks to constrain a global three-dimensional atmospheric model simulation and then...
A C. Staudt, Daniel J. Jacob, Jennifer A. Logan, David Bachiochi, T. N. Krishnamurti
[1] A global three-dimensional model of tropospheric chemistry driven by reanalyzed European Centre for Medium-Range Weather Forecasts meteorological data is used to examine the sources of O3, CO,...
All V. Martin, Daniel J. Jacob, Jennifer A. Logan, Isabelle Bey, Robert M. Yantosca, A C. Staudt, ...
[1] We interpret the distribution of tropical tropospheric ozone columns (TTOCs) from the Total Ozone Mapping Spectrometer (TOMS) by using a global three-dimensional model of tropospheric chemistry...
Atmospheric budget of acetone (2002)
Daniel J. Jacob, Brendan D. Field, Emily Jin, Isabelle Bey, Qinbin Li, Jennifer A. Logan, ...
ABSTRACT. The atmospheric budget and distribution of acetone are investigated by using best a priori estimates of sources and sinks to constrain a global 3-dimensional atmospheric model simulation,...
An improved retrieval of tropospheric nitrogen dioxide from (2002)
All V. Martin, Kelly Chance, Daniel J. Jacob, Thomas P. Kurosu, James F. Gleason, ...
1 Martin et al. We present a retrieval of tropospheric nitrogen dioxide (NO2) columns from the Global Ozone Monitoring Experiment (GOME) instrument that is improved in several ways over previous...
Stratospheric versus pollution influences on ozone at Bermuda: (2002)
Reconciling Past Analyses, Qinbin Li, Daniel J. Jacob, T. Duncan Fairlie, Hongyu Liu, All V. Martin, ...
l reproduce the previously reported subsidence associated with high-ozone events. Even in the free troposphere, we find that the stratosphere contributes less than 5 ppbv (<10%) to spring ozone...
Sources of tropospheric ozone along the Asian Pacific Rim: (2002)
An Analysis Of, Hongyu Liu, Daniel J. Jacob, Lo Yin Chan, Samuel J. Oltmans, Isabelle Bey, ...
this paper, we use a global threedimensional chemical tracer model (GEOS-CHEM) [Bey et al., 2001a] driven by assimilated meteorological observations from the Goddard Earth Observing System data...
Stratospheric Versus Pollution Influences on Ozone at (2002)
Bermuda Reconciling Past, Qinbin Li, Daniel J. Jacob, T. Duncan Fairlie, Hongyu Liu, Robert M. Yantosca, ...
Conflicting interpretations of the spring ozone maximum observed at Bermuda (32 W) have fueled the debate on stratospheric influence versus tropospheric production as sources of tropospheric ozone....
Mapping isoprene emissions over North America using formaldehyde (2002)
Column Observations From, Paul I. Palmer, Daniel J. Jacob, Arlene M. Fiore, All V. Martin, Kelly Chance, ...
this paper is to assess the accuracy of the GOME HCHO column data. No specific validation experiments have been conducted for that purpose. In situ HCHO measurements from the ground, and, to a lesser...
Global and Regional Decreases in Tropospheric Oxidants From (2002)
Photochemical Effects Of, All V. Martin, Daniel J. Jacob, Robert M. Yantosca, Mian Chin, Paul Ginoux
this paper. [3] Scattering and absorption of ultraviolet (UV) radiation by aerosols modifies photolysis rates [He and Carmichael, 1999; Liao et al., 1999]. Reactive heterogeneous uptake of HO 2 ,NO 2...
Arlene M. Fiore, Daniel J. Jacob, Isabelle Bey, Robert M. Yantosca, Brendan D. Field, Andrew C. Fusco, ...
Observations indicate that ozone (O3) concentrations in surface air over the United States (U.S.) in summer contain a 20-45 ppbv background contribution, presumably reflecting transport from outside...
An improved retrieval of tropospheric nitrogen dioxide from (2002)
All V. Martin, Kelly Chance, Daniel J. Jacob, Thomas P. Kurosu, Eric Bucsela, ...
[1] We present a retrieval of tropospheric nitrogen dioxide (NO 2) columns from the Global Ozone Monitoring Experiment (GOME) satellite instrument that improves in several ways over previous...
Transatlantic transport of pollution and its effects on surface ozone in Europe and (2002)
Qinbin Li, Daniel J. Jacob, Isabelle Bey, Paul I. Palmer, Bryan N. Duncan, Brendan D. Field, ...
[1] We examine the transatlantic transport of anthropogenic ozone and its impact on surface ozone in Europe and North America by using a 5-year (1993–1997) simulation with the GEOS-CHEM global...
A tropospheric ozone maximum over the Middle (2001)
Qinbin Li, Daniel J. Jacob, Jennifer A. Logan, Isabelle Bey, Robert M, Hongyu Liu, ...
Abstract. The GEOS-CHEM global 3-D model of tropospheric chemistry predicts a summertime O3 maximum over the Middle East, with mean mixing ratios in the middle and upper troposphere in excess of 80...
A tropospheric ozone maximum over the Middle (2001)
Qinbin Li, Daniel J. Jacob, Jennifer A. Logan, Isabelle Bey, Robert M, Hongyu Liu, ...
Abstract. The GEOS-CHEM global 3-D model of tropospheric chemistry predicts a summertime O3 maximum over the Middle East, with mean mixing ratios in the middle and upper troposphere in excess of 80...
Contributed Qinbin Li, Daniel J. Jacob, Robert M. Yantosca, Brendan D. Field, Hongyu Liu, Jennifer A. Logan, ...
There is considerable interest in understanding the linkages between regional ozone pollution and global atmospheric chemistry because of the implications for the oxidizing power of the atmosphere,...
Paul I. Palmer, Daniel J. Jacob, Kelly Chance, Randall V. Martin, All V. Martin, ...
. A new formulation for the air-mass factor (AMF) is presented. This factor is used to retrieve vertical columns of trace species from spectrally tted satellite measurements of slant columns in a...
Isabelle Bey, Daniel J. Jacob, Robert. M. Yantosca, Jennifer. A. Logan, Brendan D. Field, D. Field, ...
We present a first description and evaluation of GEOS-CHEM, a global three-dimensional (3-D) model of tropospheric chemistry driven by assimilated meteorological observations from the Goddard Earth...
Background ozone over the United States in summer: (2001)
Origin Trend And, Arlene M. Fiore, Daniel J. Jacob, Isabelle Bey, Robert M. Yantosca, Brendan D. Field, ...
g, at least in the model, rising Asian emissions). In the model, background O 3 produced outside of the North American boundary layer contributes an average 25 -- 35 ppbv to afternoon O 3...
Asian chemical outflow to the Pacific in spring: (2001)
Origins Pathways And, Isabelle Bey, Daniel J. Jacob, Jennifer A. Logan, Robert M. Yantosca
We analyze the Asian outflow of CO, ozone, and nitrogen oxides (NO x ) to the Pacific in spring by using the GEOS-CHEM global three-dimensional model of tropospheric chemistry and simulating the...
Isabelle Bey, Daniel J. Jacob, Robert M. Yantosca, Jennifer A. Logan, Brendan D. Field, Afiene M. Fiore, ...
Abstract. We present a first description and evaluation of GEOS-CHEM, a global threedimensional (3-D) model of tropospheri chemistry driven by assimilated meteorological observations from the Goddard...
Paul I. Palmer, Daniel J. Jacob, Kelly Chance, All V. Martin, Robert J. D, Thomas P. Kurosu, ...
Abstract. We present a new formulation for the air mass factor (AMF) to convert slant column measurements of optically thin atmospheric species from space into total vertical columns. Because of...
budget in the upper troposphere over the tropical South Pacific (2000)
Martin Schultz Daniel, Daniel J. Jacob, John D. Bradshaw, Scott T. S, Jack E. Dibb, W. Talbot, ...
The chemical budget in the upper troposphere over the tropical South Pacific is analyzed using aircraft measurements made at 6-12 km altitude in September 1996 during the Global Tropospheric...
Radicals In The, Lyatt Jaegl, Daniel J. Jacob, William H. Brune, Paul O. Wennberg
. Aircraft observations from three recent missions (STRAT, SUCCESS, SONEX) are synthesized into a theoretical analysis of the factors controlling the concentrations of HO x radicals (HO x = OH +...
Detection of a Lightning Influence on Tropical Tropospheric Ozone (2000)
Randall V. Martin, All V. Martin, Daniel J. Jacob, Jennifer A. Logan, Jerry M. Ziemke, Richard Washington
. Empirical orthogonal functions (EOFs) are used to analyze a 14-year record of tropical tropospheric ozone columns (TTOCs) determined from satellite measurements. The first EOF explains 54% of TTOC...
The Oxidizing Power of the Atmosphere (2000)
INTRODUCTION The atmosphere is an oxidizing medium. Many environmentally important trace gases are removed from the atmosphere by oxidation including methane and other organic compounds, carbon...
Loretta J. Mickley, Daniel J. Jacob, David Rind
. Recent model calculations of the global mean radiative forcing from tropospheric ozone since preindustrial times fall in a relatively narrow range, from 0.3 to 0.5 W m ,2 . These calculations use...
Increasing Backgroundozone In Surface Air Over The United States (2000)
Daniel J. Jacob, J. William Munger, Arlene M. Fiore
The long-term trend in background O 3 in surface air over the United States from 1980 to 1998 is examined using monthly probability distributions of daily maximum 8hour average O 3 concentrations at...
Satellite observations of formaldehyde over North America from GOME (2000)
Kelly Chance, Paul I. Palmer, Randall V. Martin, All V. Martin, Thomas P. Kurosu, ...
. Formaldehyde (HCHO) is an important indicator of tropospheric hydrocarbon emissions and photochemical activity. We present HCHO observations over North America for July 1996 from the GOME...
Heterogeneous chemistry and tropospheric ozone, Atmos (2000)
Ozone is produced in the troposphere by gas-phase oxidation of hydrocarbons and CO catalyzed by hydrogen oxide radicals (HO �,OH#H#peroxy radicals) and nitrogen oxide radicals (NO �,NO#NO �)....
Increasing background ozone in surface air over the United (2000)
Daniel J. Jacob, J. William Munger, Arlene M. Fiore
Abstract. The long-term trend of background O3 in surface air over the United States from 1980 to 1998 is examined using monthly probability distributions of daily maximum 8hour average O3...
Increasing Background Ozone in Surface Air Over the United (2000)
Daniel J. Jacob, J. William Munger, Arlene M. Fiore
Abstract. The long-term trend of background O3 in surface oxidation products). By examining results from these difair over the United States from 1980 to 1998 is examined ferent approaches they...
Chemistry of HO radicals in the upper troposphere (2000)
Lyatt Jaegleh, Daniel J. Jacob, William H. Brune, Paul O. Wennberg
Aircraft observations from three recent missions (STRAT, SUCCESS, SONEX) are synthesized into a theoretical analysis of the factors controlling the concentrations of HO radicals (HO "OH#peroxy)...
On the origin of tropospheric ozone and NO x over the tropical south (1999)
Martin G. Schultz, Daniel J. Jacob, Yuhang Wang, Jennifer A. Logan, Elliot Atlas, R. Blake, ...
for PEM-Tropics special section
Daniel S. Cohan, Martin G. Schultz, Daniel J. Jacob, B. G. Heikes, D. R. Blake
The convective injection and subsequent fate of the peroxides H 2 O 2 and CH 3 OOH in the upper troposphere is investigated using aircraft observations from the NASA Pacific Exploratory Mission -...
Effect of rising Asian emissions on surface ozone (1999)
Daniel J. Jacob, Jennifer A. Logan, Prashant P. Murti
Abstract. The effect of increasing fossil fuel combustion in eastern Asia on surface O3 air pollution in the United States is examined with a global three-dimensional tropospheric chemistry model....
Global simulation of tropospheric O (1998)
Hydrocarbon Chemistry Model, Yuhang Wang, Jennifer A. Logan, Daniel J. Jacob
. Results from a global three-dimensional model for tropospheric O 3 -NO x -hydrocarbon chemistry are presented and evaluated with surface, ozonesonde, and aircraft measurements. Seasonal variations...
The Oxidizing Power of the Atmosphere (1998)
Daniel J. Jacob, T. Potter, B. Colman, J. Fishman
INTRODUCTION The atmosphere is an oxidizing medium. Many environmentally important trace gases emitted from the Earth's surface are removed from the atmosphere by oxidation. The list includes...
A persistent imbalance in HO x and NO x photochemistry of (1998)
The Upper Troposphere, Michael J. Prather, Daniel J. Jacob
Convection in the tropics turns over the upper troposphere at rates (0.08 d ) comparable to photochemical processes controlling the absolute abundance of HO x (OH + HO 2 ) and the abundance of NO x...
Anthropogenic forcing on tropospheric ozone and OH since preindustrial times (1998)
Abstract. A global three-dimensional model of tropospheric chemistry is used to investigate the changes in tropospheric O 3 and OH since preindustrial times as a result of fuel combustion and...
Long-term trends in ground level ozone over the contiguous United (1998)
Arlene M. Fiore, Daniel J. Jacob, Jennifer A. Logan, Jeffrey H. Vin
Abstract. Long-term trends of median and 90th percentile summer afternoon 0 3 concentrations were examined at 549 sites across the United States for the 1980-1995 period. Daily temperature data were...
Jinyou Liang, Larry W. Horowitz, Daniel J. Jacob, Yuhang Wang, Arlene M. Fiore, Jennifer A. Logan, ...
Abstract. A three-dimensional, continental-scale photochemical model is used to investigate seasonal budgets of 03 and NO3. species (including NOx and its oxidation products) in the boundary layer...
Instrument to collect fogwater for chemical analysis (1985)
Jacob, Daniel J., Waldman, Jed M., Haghi, Mehrdad, Hoffmann, Michael R., Flagan, Richard C.
An instrument is presented which collects large samples of ambient fogwater by impaction of droplets on a screen. The collection efficiency of the instrument is determined as a function of droplet...
2002a), Linking ozone pollution and climate change: The case for controlling methane, Geophys (1919)
Arlene M. Fiore, Daniel J. Jacob, Brendan D. Field, David G. Streets, Suneeta D. Fern, Carey Jang
[1] Methane (CH 4) emission controls are found to be a powerful lever for reducing both global warming and air pollution via decreases in background tropospheric ozone (O 3). Reducing anthropogenic...
2002), Linking ozone pollution and climate change: The case for controlling methane, Geophys (1919)
Arlene M. Fiore, Daniel J. Jacob, Brendan D. Field, David G. Streets, Suneeta D. Fern, Carey Jang
Accepted for publication in Geophys. Res. Lett.