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William Swartz

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Atmospheric scientist; Principal Investigator
240-228-8462
  • PhD, Atmospheric chemistry
    2002, University of Maryland, College Park
  • AM, Organic chemistry
    1993, Harvard University
  • BS, Chemistry
    1991, University of Maryland, College Park

I have been active in atmospheric science since 1995 and have broad research experience in modeling/analysis, technology development, space mission development, field measurement, and laboratory experimentation. In recent years I have been the Principal Investigator for the Radiometer Assessment using Vertically Aligned Nanotubes (RAVAN): a CubeSat pathfinder to measure Earth’s energy budget, launched in 2016; and the Compact Hyperspectral Air Pollution Sensor (CHAPS): an instrument development project to build and test a compact space instrument for the remote sensing of atmospheric pollution. Both projects were funded by NASA’s Earth Science Technology Office. I am also a long-time member of the NASA Aura/Ozone Monitoring Instrument NO2 retrieval team.

RAVAN demonstrated the first-ever use of carbon nanotubes as a radiometer absorber in space—a technology that has now been adopted in several solar and Earth energy budget space missions—and gallium phase-change calibration cells. CHAPS, which is currently in its development phase, will use freeform optics and additive manufacturing to achieve science-quality performance in a smallsat-sized form factor.

Notable Awards and Leadership

Year(s) Description
2021 (awarded 2020) Special Award, American Meteorological Society: Ozone Monitoring Instrument (OMI) International Team (Team Award)
2018 William T. Pecora Award, U.S. Department of the Interior and NASA: Ozone Monitoring Instrument (OMI) International Team (Team Award)
2015–2016 Member, NRC Committee on Achieving Science Goals with CubeSats
1998, 2001, 2004, 2008 NASA Science team group achievement awards

Scholarly Publications

Assessment of NO<inf>2</inf> observations during DISCOVER-AQ and KORUS-AQ field campaigns

Atmospheric Measurement Techniques, 2020
S. Choi, L.N. Lamsal, M. Follette-Cook, J. Joiner, N.A. Krotkov, W.H. Swartz, K.E. Pickering, C.P. Loughner, W. Appel, G. Pfister, P.E. Saide, R.C. Cohen, A.J. Weinheimer, J.R. Herman, (2020), Assessment of NO2 observations during DISCOVER-AQ and KORUS-AQ field campaigns, Atmospheric Measurement Techniques, 13, 5, 2523-2546

Trutinor: A Conceptual Study for a Next-Generation Earth Radiant Energy Instrument

Remote Sensing, 2020
Cindy L. Young, Constantine Lukashin, Patrick Taylor, Rand Swanson, William S. Kirk, Michael Cooney, William Swartz, Arnold Goldberg, Thomas Stone, Trevor Jackson, David R. Doelling, Joseph Shaw, Christine Buleri, (2020), Trutinor: A Conceptual Study for a Next-Generation Earth Radiant Energy Instrument, Remote Sensing

RAVAN: CubeSat Demonstration for Multi-Point Earth Radiation Budget Measurements

Remote Sensing, 2019
William Swartz, Steven R. Lorentz, Stergios J. Papadakis, Philip M. Huang, Allan W. Smith, David M. Deglau, Yinan Yu, Sonia M. Reilly, Nolan M. Reilly, Donald E. Anderson, (2019), RAVAN: CubeSat Demonstration for Multi-Point Earth Radiation Budget Measurements, Remote Sensing

Radiometer Assessment Using Vertically Aligned Nanotubes (RAVAN)

International Geoscience and Remote Sensing Symposium (IGARSS), 2019
W.H. Swartz, S.R. Lorentz, P.M. Huang, S.M. Reilly, N.M. Reilly, S.J. Papadakis, (2019), Radiometer Assessment Using Vertically Aligned Nanotubes (RAVAN), International Geoscience and Remote Sensing Symposium (IGARSS), 4975-4977

Carbon nanotube-based radiometers demonstrated on the RAVAN CubeSat mission

Proceedings of SPIE - The International Society for Optical Engineering, 2019
W.H. Swartz, S.J. Papadakis, D.M. Deglau, S.R. Lorentz, A.W. Smith, P.M. Huang, (2019), Carbon nanotube-based radiometers demonstrated on the RAVAN CubeSat mission, Proceedings of SPIE - The International Society for Optical Engineering, 10982

High-resolution NO2 observations from the Airborne Compact Atmospheric Mapper: Retrieval and validation

Journal of Geophysical Research-Atmospheres, 2017
L. N. Lamsal, S. J. Janz, N. A. Krotkov, K. E. Pickering, R. J. D. Spurr, M. G. Kowalewski, C. P. Loughner, J. H. Crawford, W. H. Swartz, J. R. Herman, (2017), High-resolution NO2 observations from the Airborne Compact Atmospheric Mapper: Retrieval and validation, Journal of Geophysical Research-Atmospheres, 122, 3, 1953-1970

A high-resolution and observationally constrained OMI NO2 satellite retrieval

Atmospheric Chemistry and Physics, 2017
Daniel L. Goldberg, Lok N. Lamsal, Christopher P. Loughner, William H. Swartz, Zifeng Lu, David G. Streets, (2017), A high-resolution and observationally constrained OMI NO2 satellite retrieval, Atmospheric Chemistry and Physics, 17, 18, 11403-11421

The version 3 OMI NO&lt;sub&gt;2&lt;/sub&gt; standard product

Atmospheric Measurement Techniques, 2017
Nickolay A. Krotkov, Lok N. Lamsal, Edward A. Celarier, William H. Swartz, Sergey V. Marchenko, Eric J. Bucsela, Ka Lok Chan, Mark Wenig, Marina Zara, (2017), The version 3 OMI NO<sub>2</sub> standard product, Atmospheric Measurement Techniques

Aura OMI observations of regional SO2 and NO2 pollution changes from 2005 to 2015

Atmospheric Chemistry and Physics, 2016
Nickolay A. Krotkov, Chris A. McLinden, Can Li, Lok N. Lamsal, Edward A. Celarier, Sergey V. Marchenko, William H. Swartz, Eric J. Bucsela, Joanna Joiner, Bryan N. Duncan, K. Folkert Boersma, J. Pepijn Veefkind, Pieternel F. Levelt, Vitali E. Fioletov, Russell R. Dickerson, Hao He, Zifeng Lu, David G. Streets, (2016), Aura OMI observations of regional SO2 and NO2 pollution changes from 2005 to 2015, Atmospheric Chemistry and Physics, 16, 7, 4605-4629

Diagnosis of Middle-Atmosphere Climate Sensitivity by the Climate Feedback-Response Analysis Method

Journal of the Atmospheric Sciences, 2016
Xun Zhu, Jeng-Hwa Yee, Ming Cai, William H. Swartz, Lawrence Coy, Valentina Aquila, Rolando Garcia, Elsayed R. Talaat, (2016), Diagnosis of Middle-Atmosphere Climate Sensitivity by the Climate Feedback-Response Analysis Method, Journal of the Atmospheric Sciences, 73, 1, 3-23

Isolating the roles of different forcing agents in global stratospheric temperature changes using model integrations with incrementally added single forcings

Journal of Geophysical Research: Atmospheres, 2016
V. Aquila, W. H. Swartz, D. W. Waugh, P. R. Colarco, S. Pawson, L. M. Polvani, R. S. Stolarski, (2016), Isolating the roles of different forcing agents in global stratospheric temperature changes using model integrations with incrementally added single forcings, Journal of Geophysical Research: Atmospheres

Revising the slant column density retrieval of nitrogen dioxide observed by the Ozone Monitoring Instrument

Journal of Geophysical Research-Atmospheres, 2015
S. Marchenko, N. A. Krotkov, L. N. Lamsal, E. A. Celarier, W. H. Swartz, E. J. Bucsela, (2015), Revising the slant column density retrieval of nitrogen dioxide observed by the Ozone Monitoring Instrument, Journal of Geophysical Research-Atmospheres, 120, 11, 5670-5692

The impact of current CH4 and N2O atmospheric loss process uncertainties on calculated ozone abundances and trends

Journal of Geophysical Research-Atmospheres, 2015
Eric L. Fleming, Christian George, Dwayne E. Heard, Charles H. Jackman, Michael J. Kurylo, Wahid Mellouki, Vladimir L. Orkin, William H. Swartz, Timothy J. Wallington, Paul H. Wine, James B. Burkholder, (2015), The impact of current CH4 and N2O atmospheric loss process uncertainties on calculated ozone abundances and trends, Journal of Geophysical Research-Atmospheres, 120, 10, 5267-5293

THE RAVAN CUBESAT MISSION: ADVANCING TECHNOLOGIES FOR CLIMATE OBSERVATION

2015 Ieee International Geoscience and Remote Sensing Symposium (Igarss), 2015
William H. Swartz, Lars P. Dyrud, Steven R. Lorentz, Dong L. Wu, Warren J. Wiscombe, Stergios J. Papadakis, Philip M. Huang, Edward L. Reynolds, Allan W. Smith, David M. Deglau, IEEE, (2015), THE RAVAN CUBESAT MISSION: ADVANCING TECHNOLOGIES FOR CLIMATE OBSERVATION, 2015 Ieee International Geoscience and Remote Sensing Symposium (Igarss) , 5300-5303

Evaluation of OMI operational standard NO2 column retrievals using in situ and surface-based NO2 observations

Atmospheric Chemistry and Physics, 2014
L. N. Lamsal, N. A. Krotkov, E. A. Celarier, W. H. Swartz, K. E. Pickering, E. J. Bucsela, J. F. Gleason, R. V. Martin, S. Philip, H. Irie, A. Cede, J. Herman, A. Weinheimer, J. J. Szykman, T. N. Knepp, (2014), Evaluation of OMI operational standard NO2 column retrievals using in situ and surface-based NO2 observations, Atmospheric Chemistry and Physics, 14, 21, 11587-11609

The power of inexpensive satellite constellations

Micro- and Nanotechnology Sensors, Systems, and Applications Vi, 2014
Lars P. Dyrud, Rose La Tour, William H. Swartz, Sreeja Nag, Steven R. Lorentz, Thomas Hilker, Warren J. Wiscombe, Stergios J. Papadakis, T George, MS Islam, AK Dutta, (2014), The power of inexpensive satellite constellations, Micro- and Nanotechnology Sensors, Systems, and Applications Vi, 9083

The use of NO2 absorption cross section temperature sensitivity to derive NO2 profile temperature and stratospheric-tropospheric column partitioning from visible direct-sun DOAS measurements

Atmospheric Measurement Techniques, 2014
E. Spinei, A. Cede, W. H. Swartz, J. Herman, G. H. Mount, (2014), The use of NO2 absorption cross section temperature sensitivity to derive NO2 profile temperature and stratospheric-tropospheric column partitioning from visible direct-sun DOAS measurements, Atmospheric Measurement Techniques, 7, 12, 4299-4316

The MSX/UVISI Stellar Occultation Experiments: Proof-of-Concept Demonstration of a New Approach to Remote Sensing of Earth's Atmosphere

Johns Hopkins Apl Technical Digest, 2014
William H Swartz, (2014), The MSX/UVISI Stellar Occultation Experiments: Proof-of-Concept Demonstration of a New Approach to Remote Sensing of Earth's Atmosphere, Johns Hopkins Apl Technical Digest

The MSX/UVISI stellar occultation experiments: Proof-of-concept demonstration of a new approach to remote sensing of Earth's atmosphere

Johns Hopkins APL Technical Digest (Applied Physics Laboratory), 2014
R.J. Vervack, J.-H. Yee, W.H. Swartz, R. Demajistre, L.J. Paxton, (2014), The MSX/UVISI stellar occultation experiments: Proof-of-concept demonstration of a new approach to remote sensing of Earth's atmosphere, Johns Hopkins APL Technical Digest (Applied Physics Laboratory), 32, 5, 803-821

Applying the OMI NO<inf>2</inf> retrieval algorithm to estimate the production efficiency of lightning NO<inf>x</inf>

Optics InfoBase Conference Papers, 2014
E. Bucsela, K.E. Pickering, D. Allen, R. Holzworth, N. Krotkov, E. Celarier, L. Lamsal, W. Swartz, S. Marchenko, (2014), Applying the OMI NO2 retrieval algorithm to estimate the production efficiency of lightning NOx, Optics InfoBase Conference Papers

A new stratospheric and tropospheric NO2 retrieval algorithm for nadir-viewing satellite instruments: applications to OMI

Atmospheric Measurement Techniques, 2013
E. J. Bucsela, N. A. Krotkov, E. A. Celarier, L. N. Lamsal, W. H. Swartz, P. K. Bhartia, K. F. Boersma, J. P. Veefkind, J. F. Gleason, K. E. Pickering, (2013), A new stratospheric and tropospheric NO2 retrieval algorithm for nadir-viewing satellite instruments: applications to OMI, Atmospheric Measurement Techniques, 6, 10, 2607-2626

Middle atmosphere response to different descriptions of the 11-yr solar cycle in spectral irradiance in a chemistry-climate model

Atmospheric Chemistry and Physics, 2012
W. H. Swartz, R. S. Stolarski, L. D. Oman, E. L. Fleming, C. H. Jackman, (2012), Middle atmosphere response to different descriptions of the 11-yr solar cycle in spectral irradiance in a chemistry-climate model, Atmospheric Chemistry and Physics, 12, 13, 5937-5948

The Global Assimilation of Information for Action (GAIA) Initiative: Understanding the Impact of Climate Change on National Security and Public Health

Sensing Technologies For Global Health, Military Medicine, Disaster Response, and Environmental Monitoring Ii: and Biometric Technology For Human Identification Ix, 2012
Shadrian B. Strong, Larry J. Paxton, Alpana Kaushiva, Maegen Nix, William H. Swartz, Michele B. Weiss, Robert Schaefer, AHJ Kolk, SO Southern, KN Montgomery, CW Taylor, BVKV Kumar, S Prabhakar, AA Ross, (2012), The Global Assimilation of Information for Action (GAIA) Initiative: Understanding the Impact of Climate Change on National Security and Public Health, Sensing Technologies For Global Health, Military Medicine, Disaster Response, and Environmental Monitoring Ii: and Biometric Technology For Human Identification Ix, 8371

Comments on "A Spectral Parameterization of Drag, Eddy Diffusion, and Wave Heating for a Three-Dimensional Flow Induced by Breaking Gravity Waves" Reply

Journal of the Atmospheric Sciences, 2011
Xun Zhu, Jeng-Hwa Yee, William H. Swartz, Elsayed R. Talaat, (2011), Comments on "A Spectral Parameterization of Drag, Eddy Diffusion, and Wave Heating for a Three-Dimensional Flow Induced by Breaking Gravity Waves" Reply, Journal of the Atmospheric Sciences, 68, 10, 2470-2477

GAIA - Global Assimilation of Information for Action

62nd International Astronautical Congress 2011, IAC 2011, 2011
L.J. Paxton, M. Weiss, M. Nix, W.H. Swartz, R.K. Schaefer, S. Strong, A. Kaushiva, S. Simpkins, N. Bos, C.K. Pikas, S. Babin, J. Holm, (2011), GAIA - Global Assimilation of Information for Action, 62nd International Astronautical Congress 2011, IAC 2011, 5, 4302-4305

A Spectral Parameterization of Drag, Eddy Diffusion, and Wave Heating for a Three-Dimensional Flow Induced by Breaking Gravity Waves

Journal of the Atmospheric Sciences, 2010
Xun Zhu, Jeng-Hwa Yee, William H. Swartz, Elsayed R. Talaat, Lawrence Coy, (2010), A Spectral Parameterization of Drag, Eddy Diffusion, and Wave Heating for a Three-Dimensional Flow Induced by Breaking Gravity Waves, Journal of the Atmospheric Sciences, 67, 8, 2520-2536

Geostationary Imaging Fabry-Perot Spectrometer (GIFS) for the measurement of trace gases and clouds

61st International Astronautical Congress 2010, IAC 2010, 2010
J.H. Yee, J. Boldt, R. DeMajistre, F. Morgan, W. Swartz, E. Talaat, W. Skinner, M.C. Pitts, C.A. Hostetler, (2010), Geostationary Imaging Fabry-Perot Spectrometer (GIFS) for the measurement of trace gases and clouds, 61st International Astronautical Congress 2010, IAC 2010, 6, 4437-4447

Global assimilation of information for action (GAIA): An integrated approach to earth science problems

61st International Astronautical Congress 2010, IAC 2010, 2010
L.J. Paxton, R. Schaefer, M. Weiss, W.H. Swartz, S. Babin, C. Pikas, S. Simpkins, A.G. Darrin, J. Holm, (2010), Global assimilation of information for action (GAIA): An integrated approach to earth science problems, 61st International Astronautical Congress 2010, IAC 2010, 7, 5898-5910

Heating rates and surface dimming due to black carbon aerosol absorption associated with a major US city

GEOPHYSICAL RESEARCH LETTERS, 2009
JP SCHWARZ, H STARK, JR SPACKMAN, TB RYERSON, J PEISCHL, WH SWARTZ, RS GAO, LA WATTS, DW FAHEY, (2009), Heating rates and surface dimming due to black carbon aerosol absorption associated with a major US city, GEOPHYSICAL RESEARCH LETTERS, 36

Calculations of solar shortwave heating rates due to black carbon and ozone absorption using in situ measurements

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2008
RS GAO, SR HALL, WH SWARTZ, JP SCHWARZ, JR SPACKMAN, LA WATTS, DW FAHEY, KC AIKIN, RE SHETTER, TP BUI, (2008), Calculations of solar shortwave heating rates due to black carbon and ozone absorption using in situ measurements, JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 113, D14

Geostationary imaging Fabry-Perot spectrometer (GIFS): Measurement of clouds and trace gases

Proceedings of SPIE - The International Society for Optical Engineering, 2008
J.-H. Yee, R. DeMajistre, W.H. Swartz, M.F. Morgan, J.D. Boldt, W.R. Skinner, M.C. Pitts, C.A. Hostetler, (2008), Geostationary imaging Fabry-Perot spectrometer (GIFS): Measurement of clouds and trace gases, Proceedings of SPIE - The International Society for Optical Engineering, 7107

Measurements of trace gases in the tropical tropopause layer

ATMOSPHERIC ENVIRONMENT, 2007
TP MARCY, PJ POPP, RS GAO, DW FAHEY, EA RAY, EC RICHARD, TL THOMPSON, EL ATLAS, M LOEWENSTEIN, SC WOFSY, S PARK, EM WEINSTOCK, WH SWARTZ, MJ MAHONEY, (2007), Measurements of trace gases in the tropical tropopause layer, ATMOSPHERIC ENVIRONMENT, 41, 7253-7261

Comparison of high-latitude line-of-sight ozone column density with derived ozone fields and the effects of horizontal inhomogeneity

ATMOSPHERIC CHEMISTRY AND PHYSICS, 2006
WH SWARTZ, JH YEE, CE RANDALL, RE SHETTER, EV BROWELL, JF BURRIS, TJ MCGEE, MA AVERY, (2006), Comparison of high-latitude line-of-sight ozone column density with derived ozone fields and the effects of horizontal inhomogeneity, ATMOSPHERIC CHEMISTRY AND PHYSICS, 6, 1843-1852

Ozone observations by the Gas and Aerosol Measurement Sensor during SOLVE II

ATMOSPHERIC CHEMISTRY AND PHYSICS, 2006
MC PITTS, LW THOMASON, JM ZAWODNY, BN WENNY, JM LIVINGSTON, PB RUSSELL, JH YEE, WH SWARTZ, RE SHETTER, (2006), Ozone observations by the Gas and Aerosol Measurement Sensor during SOLVE II, ATMOSPHERIC CHEMISTRY AND PHYSICS, 6, 2695-2709

Aerosol optical depth measurements by airborne sun photometer in SOLVE II: Comparisons to SAGE III, POAM III and airborne spectrometer measurements

Atmospheric Chemistry and Physics, 2005
P Russell, J Livingston, B Schmid, J Eilers, R Kolyer, J Redemann, S Ramirez, JH Yee, W Swartz, R Shetter, C Trepte, A Risley, B Wenny, J Zawodny, W Chu, M Pitts, J Lumpe, M Fromm, C Randall, K Hoppel, R Bevilacqua, (2005), Aerosol optical depth measurements by airborne sun photometer in SOLVE II: Comparisons to SAGE III, POAM III and airborne spectrometer measurements, Atmospheric Chemistry and Physics, 5, 1311-1339

Column ozone and aerosol optical properties retrieved from direct solar irradiance measurements during SOLVE II

ATMOSPHERIC CHEMISTRY AND PHYSICS, 2005
WH SWARTZ, JH YEE, RE SHETTER, SR HALL, BL LEFER, JM LIVINGSTON, PB RUSSELL, EV BROWELL, MA AVERY, (2005), Column ozone and aerosol optical properties retrieved from direct solar irradiance measurements during SOLVE II, ATMOSPHERIC CHEMISTRY AND PHYSICS, 5, 611-622

Molecular velocity distributions and generalized scale invariance in the turbulent atmosphere

FARADAY DISCUSSIONS, 2005
AF TUCK, SJ HOVDE, EC RICHARD, RS GAO, TP BUI, WH SWARTZ, SA LLOYD, (2005), Molecular velocity distributions and generalized scale invariance in the turbulent atmosphere, FARADAY DISCUSSIONS, 130, 181-193

Retrieval of ozone column content from airborne Sun photometer measurements during SOLVE II: comparison with coincident satellite and aircraft measurements

ATMOSPHERIC CHEMISTRY AND PHYSICS, 2005
JM LIVINGSTON, B SCHMID, PB RUSSELL, JA EILERS, RW KOLYER, J REDEMANN, SA RAMIREZ, JH YEE, WH SWARTZ, CR TREPTE, LW THOMASON, MC PITTS, MA AVERY, CE RANDALL, JD LUMPE, RM BEVILACQUA, M BITTNER, T ERBERTSEDER, RD MCPETERS, RE SHETTER, EV BROWELL, JB KERR, K LAMB, (2005), Retrieval of ozone column content from airborne Sun photometer measurements during SOLVE II: comparison with coincident satellite and aircraft measurements, ATMOSPHERIC CHEMISTRY AND PHYSICS, 5, 2035-2054

Geostationary Imaging Fabry-Perot spectrometer (GIFS)

INSTRUMENTS, SCIENCE, AND METHODS FOR GEOSPACE AND PLANETARY REMOTE SENSING, 2004
JH YEE, MF MORGAN, R DEMAJISTRE, ER TALAAT, JF GARTEN, WH SWARTZ, WR SKINNER, CA NARDELL, PG LUCEY, JB GARVIN, (2004), Geostationary Imaging Fabry-Perot spectrometer (GIFS), 5660, 14-22

Photolysis frequency of O-3 to O(D-1): Measurements and modeling during the International Photolysis Frequency Measurement and Modeling Intercomparison (IPMMI)

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2004
A HOFZUMAHAUS, BL LEFER, PS MONKS, SR HALL, A KYLLING, B MAYER, RE SHETTER, W JUNKERMANN, A BAIS, JG CALVERT, CA CANTRELL, S MADRONICH, GD EDWARDS, A KRAUS, M MULLER, B BOHN, R SCHMITT, P JOHNSTON, R MCKENZIE, GJ FROST, E GRIFFIOEN, M KROL, T MARTIN, G PFISTER, EP ROTH, A RUGGABER, WH SWARTZ, SA LLOYD, M VAN WEELE, (2004), Photolysis frequency of O-3 to O(D-1): Measurements and modeling during the International Photolysis Frequency Measurement and Modeling Intercomparison (IPMMI), JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 109, D8

Intercomparison of MSX/UVISI-derived ozone and temperature profiles with ground-based, SAGE II, HALOE, and POAM III data

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2003
RJ VERVACK, JH YEE, R DEMAJISTRE, WH SWARTZ, (2003), Intercomparison of MSX/UVISI-derived ozone and temperature profiles with ground-based, SAGE II, HALOE, and POAM III data, JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 108, D22

International Photolysis Frequency Measurement and Model Intercomparison (IPMMI): Spectral actinic solar flux measurements and modeling

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2003
AF BAIS, S MADRONICH, J CRAWFORD, SR HALL, B MAYER, M VAN WEELE, J LENOBLE, JG CALVERT, CA CANTRELL, RE SHETTER, A HOFZUMAHAUS, P KOEPKE, PS MONKS, G FROST, R MCKENZIE, N KROTKOV, A KYLLING, WH SWARTZ, S LLOYD, G PFISTER, TJ MARTIN, EP ROETH, E GRIFFIOEN, A RUGGABER, M KROL, A KRAUS, GD EDWARDS, M MUELLER, BL LEFER, P JOHNSTON, H SCHWANDER, D FLITTNER, BG GARDINER, J BARRICK, R SCHMITT, (2003), International Photolysis Frequency Measurement and Model Intercomparison (IPMMI): Spectral actinic solar flux measurements and modeling, JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 108, D16

Photolysis frequency of NO2: Measurement and modeling during the International Photolysis Frequency Measurement and Modeling Intercomparison (IPMMI)

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2003
RE SHETTER, W JUNKERMANN, WH SWARTZ, GJ FROST, JH CRAWFORD, BL LEFER, JD BARRICK, SR HALL, A HOFZUMAHAUS, A BAIS, JG CALVERT, CA CANTRELL, S MADRONICH, M MULLER, A KRAUS, PS MONKS, GD EDWARDS, R MCKENZIE, P JOHNSTON, R SCHMITT, E GRIFFIOEN, M KROL, A KYLLING, RR DICKERSON, SA LLOYD, T MARTIN, B GARDINER, B MAYER, G PFISTER, EP ROTH, P KOEPKE, A RUGGABER, H SCHWANDER, M VAN WEELE, (2003), Photolysis frequency of NO2: Measurement and modeling during the International Photolysis Frequency Measurement and Modeling Intercomparison (IPMMI), JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 108, D16

Photochemical ozone loss in the Arctic as determined by MSX/UVISI stellar occultation observations during the 1999/2000 winter

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2002
WH SWARTZ, JH YEE, RJ VERVACK, SA LLOYD, PA NEWMAN, (2002), Photochemical ozone loss in the Arctic as determined by MSX/UVISI stellar occultation observations during the 1999/2000 winter, JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 107, D20

Reconstruction of three-dimensional ozone fields using POAM III during SOLVE

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2002
CE RANDALL, JD LUMPE, RM BEVILACQUA, KW HOPPEL, MD FROMM, RJ SALAWITCH, WH SWARTZ, SA LLOYD, E KYRO, P VON DER GATHEN, H CLAUDE, J DAVIES, H DEBACKER, H DIER, MJ MOLYNEUX, J SANCHO, (2002), Reconstruction of three-dimensional ozone fields using POAM III during SOLVE, JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 107, D20

Jno(2) at high solar zenith angles in the lower stratosphere

GEOPHYSICAL RESEARCH LETTERS, 2001
RS GAO, LA DEL NEGRO, WH SWARTZ, RJ SALAWITCH, SA LLOYD, MH PROFFITT, DW FAHEY, SG DONNELLY, JA NEUMAN, RM STIMPFLE, TP BUI, (2001), Jno(2) at high solar zenith angles in the lower stratosphere, GEOPHYSICAL RESEARCH LETTERS, 28, 12, 2405-2408

Ozone destruction and production rates between spring and autumn in the Arctic stratosphere

GEOPHYSICAL RESEARCH LETTERS, 2000
DW FAHEY, RS GAO, LA DEL NEGRO, ER KEIM, SR KAWA, RJ SALAWITCH, PO WENNBERG, TF HANISCO, EJ LANZENDORF, KK PERKINS, SA LLOYD, WH SWARTZ, MH PROFFITT, JJ MARGITAN, JC WILSON, RM STIMPFLE, RC COHEN, CT MCELROY, CR WEBSTER, M LOEWENSTEIN, JW ELKINS, TP BUI, (2000), Ozone destruction and production rates between spring and autumn in the Arctic stratosphere, GEOPHYSICAL RESEARCH LETTERS, 27, 17, 2605-2608

A sensitivity study of photolysis rate coefficients during POLARIS

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 1999
WH SWARTZ, SA LLOYD, TL KUSTERER, DE ANDERSON, CT MCELROY, C MIDWINTER, (1999), A sensitivity study of photolysis rate coefficients during POLARIS, JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 104, D21, 26725-26735

Comparison of modeled and observed values of NO2 and JNO(2) during the Photochemistry of Ozone Loss in the Arctic Region in Summer (POLARIS) mission

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 1999
LA DEL NEGRO, DW FAHEY, RS GAO, SG DONNELLY, ER KEIM, JA NEUMAN, RC COHEN, KK PERKINS, LC KOCH, RJ SALAWITCH, SA LLOYD, MH PROFFITT, JJ MARGITAN, RM STIMPFLE, GP BONNE, PB VOSS, PO WENNBERG, CT MCELROY, WH SWARTZ, TL KUSTERER, DE ANDERSON, LR LAIT, TP BUI, (1999), Comparison of modeled and observed values of NO2 and JNO(2) during the Photochemistry of Ozone Loss in the Arctic Region in Summer (POLARIS) mission, JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 104, D21, 26687-26703

Intercomparison of total ozone observations at Fairbanks, Alaska, during POLARIS

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 1999
S LLOYD, WH SWARTZ, T KUSTERER, D ANDERSON, CT MCELROY, C MIDWINTER, R HALL, K NASSIM, D JAFFE, W SIMPSON, J KELLEY, D NICKS, D GRIFFIN, B JOHNSON, R EVANS, D QUINCY, S OLTMANS, P NEWMAN, R MCPETERS, G LABOW, L MOY, C SEFTOR, G TOON, B SEN, JF BLAVIER, (1999), Intercomparison of total ozone observations at Fairbanks, Alaska, during POLARIS, JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 104, D21, 26767-26778

Twilight observations suggest unknown sources of HOx

GEOPHYSICAL RESEARCH LETTERS, 1999
PO WENNBERG, RJ SALAWITCH, DJ DONALDSON, TF HANISCO, EJ LANZENDORF, KK PERKINS, SA LLOYD, V VAIDA, RS GAO, EJ HINTSA, RC COHEN, WH SWARTZ, TL KUSTERER, DE ANDERSON, (1999), Twilight observations suggest unknown sources of HOx, GEOPHYSICAL RESEARCH LETTERS, 26, 10, 1373-1376

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JOURNAL OF ORGANIC CHEMISTRY, 1992
YS JUNG, WH SWARTZ, W XU, PS MARIANO, NJ GREEN, AG SCHULTZ, (1992), EXPLORATORY STUDIES OF ALPHA-SILYLAMINO AND ALPHA-SILYLAMIDO 2,5-CYCLOHEXADIEN-1-ONE SET PHOTOCHEMISTRY - METHODOLOGY FOR SYNTHESIS OF FUNCTIONALIZED HYDROISOQUINOLINES, JOURNAL OF ORGANIC CHEMISTRY, 57, 22, 6037-6047

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JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1992
SL LEE, TW HEPBURN, WH SWARTZ, HL AMMON, PS MARIANO, D DUNAWAYMARIANO, (1992), STEREOCHEMICAL PROBE FOR THE MECHANISM OF P-C BOND-CLEAVAGE CATALYZED BY THE BACILLUS-CEREUS PHOSPHONOACETALDEHYDE HYDROLASE, JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 114, 19, 7346-7354

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JOURNAL OF ORGANIC CHEMISTRY, 1991
MS MCQUENEY, SL LEE, WH SWARTZ, HL AMMON, PS MARIANO, D DUNAWAYMARIANO, (1991), EVIDENCE FOR AN INTRAMOLECULAR, STEPWISE REACTION PATHWAY FOR PEP PHOSPHOMUTASE CATALYZED P-C BOND FORMATION, JOURNAL OF ORGANIC CHEMISTRY, 56, 25, 7121-7130