Yung, Yuk L., Taketa, Cameron, Cheung, Ross, Shia, Run-Lie
We show that the function S_(1)(x) = ∑_(k=1)^∞ e^(-2πkx) log k can be expressed as the sum of a simple function and an infinite series, whose coefficients are related to the Riemann zeta...
Hodyss, Robert, Parkinson, Christopher D., Johnson, Paul V., Stern, Julie V., Goguen, Jay D., Yung, Yuk L., ...
Near infrared spectra of the surface of Enceladus returned by Cassini show the presence of an absorption feature at 3.53 μm, ascribed by Brown et al. (2006) to “short chain organics,” and by...
Choi, Yunsoo, Kim, Jinwon, Eldering, Annmarie, Osterman, Gregory, Yung, Yuk L., Gu, Yu, ...
The migration of enhancements in NO_2 concentration, outgoing longwave radiation (OLR), and radiative effects associated with the onset of the North American Monsoon in July 2005 has been...
Modulation of the Period of the Quasi-Biennial Oscillation by the Solar Cycle (2009)
Le, Kuai, Shia, Run-Lie, Jiang, Xun, Tung, Ka Kit, Yung, Yuk L.
The authors examine the mechanism of solar cycle modulation of the Quasi-Biennial Oscillation (QBO) period using the Two-and-a-Half-Dimensional Interactive Isentropic Research (THINAIR) model....
Atmospheric pressure as a natural climate regulator for a terrestrial planet with a biosphere (2009)
Li, King-Fai, Pahlevan, Kaveh, Kirschvink, Joseph L., Yung, Yuk L.
Lovelock and Whitfield suggested in 1982 that, as the luminosity of the Sun increases over its life cycle, biologically enhanced silicate weathering is able to reduce the concentration of atmospheric...
Nonstationary Synchronization of Equatorial QBO with SAO in Observations and a Model (2009)
Kuai, Le, Shia, Run-Lie, Jiang, Xun, Tung, Ka-Kit, Yung, Yuk L.
It has often been suggested that the period of the quasi-biennial oscillation (QBO) has a tendency to synchronize with the semiannual oscillation (SAO). Apparently the synchronization is better the...
Evidence for carbonyl sulfide (OCS) conversion to CO in the lower atmosphere of Venus (2009)
Yung, Yuk L., Liang, M. C., Jiang, X., Shia, R. L., Lee, C., Bézard, B., ...
The chemical regimes in the atmosphere of Venus vary from photochemistry in the middle atmosphere to thermal equilibrium chemistry in the lower atmosphere and the surface. Many chemical cycles have...
Modeling the distribution of H_2O and HDO in the upper atmosphere of Venus (2009)
Liang, Mao-Chang, Yung, Yuk L.
The chemical and dynamical processes in the upper atmosphere of Venus are poorly known. Recently obtained vertical profiles of trace species from the Venus Express mission, such as HCl, H_2O, and...
Natraj, Vijay, Li, King-Fai, Yung, Yuk L.
Tables that have been used as a reference for nearly 50 years for the intensity and polarization of reflected and transmitted light in Rayleigh scattering atmospheres have been found to be...
Simulation of upper tropospheric CO₂ from chemistry and transport models (2008)
Jiang, Xun, Li, Qinbin, Liang, Mao-Chang, Shia, Run-Lie, Chahine, Moustafa T., Olsen, Edward T., ...
The California Institute of Technology/Jet Propulsion Laboratory two-dimensional (2-D), three-dimensional (3-D) GEOS-Chem, and 3-D MOZART-2 chemistry and transport models (CTMs), driven respectively...
Measured HDO/H 2O ratios across the tropical tropopause (2008)
Zhiming Kuang, Geoffrey C. Toon, Paul O. Wennberg, Yuk L. Yung
[1] We present the first simultaneous measurements of HDO and H2O in the tropical upper troposphere (UT) and lower stratosphere (LS) as derived from infrared solar absorption spectra acquired by the...
Cheung, Ross, Li, King Fai, Wang, Shuhui, Pongetti, Thomas J., Cageao, Richard P., Sander, Stanley P., ...
The Fourier Transform Ultraviolet Spectrometer (FTUVS) instrument has recorded a long-term data record of the atmospheric column abundance of the hydroxyl radical (OH) using the technique of high...
Wang, Shuhui, Pickett, Herbert M., Pongetti, Thomas J., Cheung, Ross, Yung, Yuk L., Shim, Changsub, ...
The first seasonal and interannual validation of OH measurements from the Aura Microwave Limb Sounder (MLS) has been conducted using ground-based OH column measurements from the Fourier Transform...
Signature of stratospheric air at the Tibetan Plateau (2008)
Liang, Mao-Chang, Tang, J., Chan, Chuen-Yu, Zheng, X. D., Yung, Yuk L.
Current estimates of gross carbon flux tend to ignore the downwelling flux of CO_2 from the stratosphere. Observations showed that there is a phase shift between the time series for the concentration...
Zhou, Li, Kaiser, Ralf I., Gao, Li Gyun, Chang, Agnes H. H., Liang, Mao-Chang, Yung, Yuk L.
We investigated the formation of two C_3H_2O isomers, i.e., cyclopropenone (c-C_3H_2O) and propynal (HCCCHO), in binary ice mixtures of carbon monoxide (CO) and acetylene (C_2H_2) at 10 K in an...
Interannual Variability and Trends of Extratropical Ozone. Part I: Northern Hemisphere (2008)
Jiang, Xun, Pawson, Steven, Camp, Charles D., Nielsen, J. Eric, Shia, Run-Lie, Liao, Ting, ...
The authors apply principal component analysis (PCA) to the extratropical total column ozone from the combined merged ozone data product and the European Centre for Medium-Range Weather Forecasts...
Interannual Variability and Trends of Extratropical Ozone. Part II: Southern Hemisphere (2008)
Jiang, Xun, Pawson, Steven, Camp, Charles D., Nielsen, J. Eric, Shia, Run-Lie, Liao, Ting, ...
A principal component analysis (PCA) is applied to the Southern Hemisphere (SH) total column ozone following the method established for analyzing the data in the Northern Hemisphere (NH) in a...
First Spitzer observations of Neptune: Detection of new hydrocarbons (2008)
Meadows, Victoria S., Orton, Glenn, Line, Michael, Liang, Mao-Chang, Yung, Yuk L., Van Cleve, Jeffrey
We present the first spectra of Neptune taken with the Spitzer Space Telescope, highlighting the high-sensitivity, moderate-resolution 10–20 μm (500–1000 cm^(−1)) spectra. We report the...
Satellite remote sounding of mid-tropospheric CO2 (2008)
Chahine, M. T., Chen, Luke, Dimotakis, Paul, Jiang, Xun, Li, Qinbi, Pagano, Thomas, ...
Does the Madden-Julian Oscillation influence aerosol variability? (2008)
Tian, Baijun, Waliser, Duane E., Kahn, Ralph A., Li, Qinbi, Yung, Yuk L., Tyranowski, Tomasz, ...
We investigate the modulation of aerosols by the Madden-Julian Oscillation (MJO) using multiple, global satellite aerosol products: aerosol index (AI) from the Total Ozone Mapping Spectrometer (TOMS)...
Liang, Mao-Chang, Blake, Geoffrey A., Yung, Yuk L.
The isotopic anomaly of oxygen in atmospheric CO2 is caused by exchange reactions with isotopically anomalous O(1D) in the middle atmosphere. In the stratosphere, the major source of O(1D) is O3...
Pernice, Holger, Garcia, Placido, Willner, Helge, Francisco, Joseph S., Mills, Franklin P., Allen, Mark, ...
For two decades, the peroxychloroformyl radical, ClC(O)OO, has played a central role in models of the chemical stability of the Venus atmosphere. No confirmation, however, has been possible in the...
Natraj, Vijay, Boesch, Hartmut, Spurr, Robert J. D., Yung, Yuk L.
In a recent paper, we introduced a novel technique to compute the polarization in a vertically inhomogeneous, scattering-absorbing medium using a two orders of scattering (2OS) radiative transfer...
Su, Hui, Jiang, Jonathan H., Gu, Yu, Neelin, J. David, Kahn, Brian H., Feldman, Daniel, ...
The variations of tropical upper tropospheric (UT) clouds with sea surface temperature (SST) are analyzed using effective cloud fraction from the Atmospheric Infrared Sounder (AIRS) on Aqua and ice...
Heavy ozone enrichments from ATMOS infrared solar spectra (2007)
Freclrick W. Lrion, Michael R. Gunson, Curtis P. Rinsl, Yuk L. Yung, Mark C. Abran~s, Albcrl Y. Chang, ...
Vertical enrichment profiles of stratc)sphcric 1601GOI K) and 160180160 have been derived from space-based solar occult at ion spectra recorded at 0.01 cm-1 resolution with the ATMOS (Atnlo-sphcric...
Evolution of the Martian Atmosphere: Results of a Monte Carlo Model of Sputtering (2007)
Using a Monte-Carlo model, we determine the sputtering yields for the upper atmosphere of Mars at three different epochs (the present,-2.5 Gyr ago and---3.5 Gyr ago). The carbon yield increases from...
Ah-san Wong, Yuk L. Yung, Joseph M. Ajello
Aromatic compounds have been considered a likely candidate for enhanced aerosol formation in the polar region of Jupiter. We develop a new chemical model for aromatic compounds in the Jovian auroral...
Tian, Baijun, Waliser, Duane E., Fetzer, Eric J., Lambrigtsen, Bjorn H., Yung, Yuk L., Wang, Bin
The atmospheric moisture and temperature profiles from the Atmospheric Infrared Sounder (AIRS)/Advanced Microwave Sounding Unit on the NASA Aqua mission, in combination with the precipitation from...
Influence of Doubled CO2 on Ozone via Changes in the Brewer–Dobson Circulation (2007)
Jiang, Xun, Eichelberger, Scott J., Hartmann, Dennis L., Shia, Runlie, Yung, Yuk L.
In this short note, the effect of enhanced circulation due to doubling CO2 on ozone is investigated. The difference of Brewer–Dobson circulation (BDC) between the doubled CO2 and control run from...
Is solar variability reflected in the Nile River? (2007)
Ruzmaikin, Alexander, Feynman, Joan, Yung, Yuk L.
We investigate the possibility that solar variability influences North African climate by using annual records of the water level of the Nile collected in 622–1470 A.D. The time series of these...
Photolytically generated aerosols in the mesosphere and thermosphere of Titan (2007)
Liang, Mao-Chang, Yung, Yuk L., Shemansky, Donald E.
Analysis of the Cassini Ultraviolet Imaging Spectrometer (UVIS) stellar and solar occultations at Titan to date include 12 species: N$_{2}$ (nitrogen), CH$_{4}$ (methane), C$_{2}$H$_{2}$ (acetylene),...
Oxygen isotopic composition of carbon dioxide in the middle atmosphere (2007)
Liang, Mao-Chang, Blake, Geoffrey A., Lewis, Brenton R., Yung, Yuk L.
The isotopic composition of long-lived trace molecules provides a window into atmospheric transport and chemistry. Carbon dioxide is a particularly powerful tracer, because its abundance remains >100...
Liang, Mao-Chang, Hartman, Hyman, Kopp, Robert E., Kirschvink, Joseph L., Yung, Yuk L.
During Proterozoic time, Earth experienced two intervals with one or more episodes of low-latitude glaciation, which are probable "Snowball Earth" events. Although the severity of the historical...
Liang, Mao-Chang, Hartman, Hyman, Kopp, Robert E., Kirschvik, Joseph L., Yung, Yuk L.
During Proterozoic time, Earth experienced two intervals with one or more episodes of low-latitude glaciation, which are probable "Snowball Earth" events. Although the severity of the historical...
Tian, Baijun, Waliser, Duane E., Fetzer, Eric J., Lambrigtsen, Bjorn H., Yung, Yuk L., Wang, Bin
The atmospheric moisture and temperature profiles from the Atmospheric Infrared Sounder (AIRS)/Advanced Microwave Sounding Unit on the NASA Aqua mission, in combination with the precipitation from...
Extratropical signature of the quasi-biennial oscillation (2006)
Ruzmaikin, Alexander, Feynman, Joan, Jiang, Xun, Yung, Yuk L.
Using the assimilated data from the National Centers for Environmental Prediction (NCEP) reanalysis, we show that the extratropical signature of the tropical quasi-biennial oscillation (QBO) is seen...
Meridional Transport in the Stratosphere of Jupiter (2005)
Liang, Mao-Chang, Shia, Run-Lie, Lee, Anthony Y. -T., Allen, Mark, Friedson, A. James, Yung, Yuk L.
The Cassini measurements of C$_2$H$_2$ and C$_2$H$_6$ at $\sim$5 mbar provide a constraint on meridional transport in the stratosphere of Jupiter. We performed a two-dimensional photochemical...
Ultraviolet Imaging Spectroscopy Shows an Active Saturnian System (2005)
Esposito, Larry W., Colwell, Joshua E., Larsen, Kristopher, McClintock, Willian E., Stewart, A. Ian F., Hallett, Janet Tew, ...
Neutral oxygen in the saturnian system shows variability, and the total number of oxygen atoms peaks at 4 x 10/34. Saturn´s aurora brithtens in response to solar-wind forcing, and the auroal...
(abstract) Odd Hydrogen in the Atmospheres of Earth and Mars (2004)
Nair, Hari, Allen, Mark, Yung, Yuk L.
The Martian atmosphere has many features in common with the terrestrial mesosphere. Both share similar pressure and temperature ranges, and much of the same chemistry operates in each. For example,...
Pernice, Holger, Garcia, Placido, Willner, Helge, Francisco, Joseph S., Mills, Franklin P., Allen, Mark, ...
For two decades, the peroxychloroformyl radical, ClC(O)OO, has played a central role in models of the chemical stability of the Venus atmosphere. No confirmation, however, has been possible in the...
Liang, Mao-Chang, Seager, Sara, Parkinson, Christopher D., Yung, Yuk L.
The close-in extrasolar giant planets (CEGPs) reside in irradiated environments much more intense than that of the giant planets in our solar system. The high UV irradiance strongly influences their...
Source of Atomic Hydrogen in the Atmosphere of HD 209458b (2003)
Liang, Mao-Chang, Parkinson, Christopher D., Lee, Anthony Y. -T., Yung, Yuk L.
Atomic hydrogen loss at the top of HD 209458b's atmosphere has been recently detected Vidal-Madjar et al. 2003. We have developed a 1-dimensional model to study the chemistry in the upper atmosphere...
Huang, Xianglei L., Yung, Yuk L., Margolis, Jack S.
We explore ways in which high-spectral-resolution measurements can aid in the retrieval of atmospheric temperature and gas-concentration profiles from outgoing infrared spectra when optically thin...
Atmospheric Trace Molecule Spectroscopy (ATMOS) experiment version 3 data retrievals (2002)
Irion, Fredrick W., Gunson, Michael R., Toon, Geoff C., Chang, Albert Y., Eldering, Annmarie, Mahieu, Emmanuel, ...
Version 3 of the Atmospheric Trace Molecule Spectroscopy (ATMOS) experiment data set for some 30 trace and minor gas profiles is available. From the IR solar-absorption spectra measured during four...
Atmospheric energy for subsurface life on Mars? (2000)
Weiss, Benjamin P., Yung, Yuk L., Nealson, Kenneth H.
The location and density of biologically useful energy sources on Mars will limit the biomass, spatial distribution, and organism size of any biota. Subsurface Martian organisms could be supplied...
Chemistry and Transport in the Middle Atmosphere: A Simple Interactive Model. (1998)
The overall goal of the research program was the development of a coupled dynamical, chemical, and radiative model of the Earth's middle atmosphere. Two specific tasks were pursued. First, we...
Origin and evolution of planetary atmospheres (1980)
Pollack, James B., Yung, Yuk L.
Spacecraft and groundbased observations of the atmospheres of solar system objects have provided a definition of their present characteristics and have yielded clues about their past history. Table 1...
Variational principle for scattering of light by dielectric particles (1978)
We exploit two fundamental properties of the dipole interaction matrix A (symmetry with respect to reversal of incident beam direction and interchange of any pair of dipoles) to construct two...
Atmospheric energy for subsurface life on Mars?
Weiss, Benjamin P., Yung, Yuk L., Nealson, Kenneth H.
The location and density of biologically useful energy sources on Mars will limit the biomass, spatial distribution, and organism size of any biota. Subsurface Martian organisms could be supplied...
Laboratory evidence for a key intermediate in the Venus atmosphere: Peroxychloroformyl radical
Pernice, Holger, Garcia, Placido, Willner, Helge, Francisco, Joseph S., Mills, Franklin P., Allen, Mark, ...
For two decades, the peroxychloroformyl radical, ClC(O)OO, has played a central role in models of the chemical stability of the Venus atmosphere. No confirmation, however, has been possible in the...
Atmospheric energy for subsurface life on Mars?
Weiss, Benjamin P., Yung, Yuk L., Nealson, Kenneth H.
The location and density of biologically useful energy sources on Mars will limit the biomass, spatial distribution, and organism size of any biota. Subsurface Martian organisms could be supplied...
Laboratory evidence for a key intermediate in the Venus atmosphere: Peroxychloroformyl radical
Pernice, Holger, Garcia, Placido, Willner, Helge, Francisco, Joseph S., Mills, Franklin P., Allen, Mark, ...
For two decades, the peroxychloroformyl radical, ClC(O)OO, has played a central role in models of the chemical stability of the Venus atmosphere. No confirmation, however, has been possible in the...
Liang, Mao-Chang, Hartman, Hyman, Kopp, Robert E., Kirschvink, Joseph L., Yung, Yuk L.
During Proterozoic time, Earth experienced two intervals with one or more episodes of low-latitude glaciation, which are probable “Snowball Earth” events. Although the severity of the historical...
Oxygen isotopic composition of carbon dioxide in the middle atmosphere
Liang, Mao-Chang, Blake, Geoffrey A., Lewis, Brenton R., Yung, Yuk L.
The isotopic composition of long-lived trace molecules provides a window into atmospheric transport and chemistry. Carbon dioxide is a particularly powerful tracer, because its abundance remains >100...