journal article

• Widespread trace bromine and iodine in remote tropospheric non-sea-salt aerosols.  Atmospheric Chemistry and Physics. 45-71. 2025
• Age of Stratospheric Air: Progress on Processes, Observations, and Long-Term Trends.  Reviews of Geophysics. 2024
• Age of air from in situ trace gas measurements: insights from a new technique.  Atmospheric Chemistry and Physics. 12425-12445. 2024
• Correction of stratospheric age of air (AoA) derived from sulfur hexafluoride (SF6) for the effect of chemical sinks.  Atmospheric Chemistry and Physics. 4193-4215. 2024
• Considering intentional stratospheric dehydration for climate benefits.  Science Advances. 2024
• Neutral Tropical African CO₂ Exchange Estimated From Aircraft and Satellite Observations.  Global Biogeochemical Cycles: an international journal of global change. 2023
• Evaluation of Processes Related to Stratosphere-Troposphere Coupling in GEFSv12 Subseasonal Hindcasts.  Monthly Weather Review. 1735-1755. 2023
• The role of tropical upwelling in explaining discrepancies betweenrecent modeled and observed lower-stratospheric ozone trends.  Atmospheric Chemistry and Physics. 3347-3361. 2023
• Pyrocumulonimbus affect average stratospheric aerosol composition.  Science. 815-+. 2023
• Supplementary material to "The role of tropical upwelling in explaining discrepancies between recent modeled and observed lower stratospheric ozone trends" 2022
• The role of tropical upwelling in explaining discrepancies between recent modeled and observed lower stratospheric ozone trends 2022
• Age spectra and other transport diagnostics in the North American monsoon UTLS from SEAC⁴RS in situ trace gas measurements.  Atmospheric Chemistry and Physics. 6539-6558. 2022
• H₂O₂ and CH₃OOH (MHP) in the Remote Atmosphere: 2. Physical and Chemical Controls.  Journal of Geophysical Research: Atmospheres. 2022
• H₂O₂ and CH₃OOH (MITP) in the Remote Atmosphere: Global Distribution and Regional Influences.  Journal of Geophysical Research: Atmospheres. 2022
• Dominant role of mineral dust in cirrus cloud formation revealed by global-scale measurements.  Nature Geoscience. 177-+. 2022
• The NASA Atmospheric Tomography (ATom) Mission Imaging the Chemistry of the Global Atmosphere.  Bulletin of the American Meteorological Society. E761-E790. 2022
• Large contribution of biomass burning emissions to ozone throughout the global remote troposphere.  Proceedings of the National Academy of Sciences of USA. 2021
• Age Spectra and Other Transport Diagnostics in the North American Monsoon UTLS from SEAC⁴RS In Situ Trace Gas Measurements 2021
• Supplementary material to "Age Spectra and Other Transport Diagnostics in the North American Monsoon UTLS from SEAC⁴RS In Situ Trace Gas Measurements" 2021
• Impact of stratospheric air and surface emissions on tropospheric nitrous oxide during ATom.  Atmospheric Chemistry and Physics. 11113-11132. 2021
• HCOOH in the Remote Atmosphere: Constraints from Atmospheric Tomography (ATom) Airborne Observations.  ACS Earth and Space Chemistry . 1436-1454. 2021
• Large hemispheric difference in nucleation mode aerosol concentrations in the lowermost stratosphere at mid- and high latitudes.  Atmospheric Chemistry and Physics. 9065-9088. 2021
• Impact of stratospheric air and surface emissions on ; tropospheric nitrous oxide during ATom 2021
• Supplementary material to "Impact of stratospheric air and surface emissions on ; tropospheric nitrous oxide during ATom" 2021
• The Global Budget of Atmospheric Methanol: New Constraints on Secondary, Oceanic, and Terrestrial Sources.  Journal of Geophysical Research: Atmospheres. 2021
• A decline in global CFC-11 emissions during 2018-2019.  Nature. 428-+. 2021
• Large hemispheric difference in ultrafine aerosol concentrations in; the lowermost stratosphere at mid and high latitudes 2021
• Supplementary material to "Large hemispheric difference in ultrafine aerosol concentrations in; the lowermost stratosphere at mid and high latitudes" 2021
• A mass-weighted isentropic coordinate for mapping chemical tracers and computing atmospheric inventories.  Atmospheric Chemistry and Physics. 217-238. 2021
• The potential role of organics in new particle formation and initial growth in the remote tropical upper troposphere.  Atmospheric Chemistry and Physics. 15037-15060. 2020
• Global-scale distribution of ozone in the remote troposphere from the ATom and HIPPO airborne field missions.  Atmospheric Chemistry and Physics. 10611-10635. 2020
• Supplementary material to "The potential role of organics in new particle formation and initial growth in the remote tropical upper troposphere" 2020
• The potential role of organics in new particle formation and initial growth in the remote tropical upper troposphere 2020
• Widespread biomass burning smoke throughout the remote troposphere.  Nature Geoscience. 422-+. 2020
• Characterization of organic aerosol across the global remote troposphere: a comparison of ATom measurements and global chemistry models.  Atmospheric Chemistry and Physics. 4607-4635. 2020
• Global-scale distribution of ozone in the remote troposphere from ATom and HIPPO airborne field missions 2020
• Supplementary material to "Global-scale distribution of ozone in the remote troposphere from ATom and HIPPO airborne field missions" 2020
• Evidence for an Oceanic Source of Methyl Ethyl Ketone to the Atmosphere.  Geophysical Research Letters. 2020
• A comprehensive assessment of tropical stratospheric upwelling in the specified dynamics Community Earth System Model 1.2.2-Whole Atmosphere Community Climate Model (CESM (WACCM)).  Geoscientific Model Development. 717-734. 2020
• The influence of the stratospheric Quasi-Biennial Oscillation on trace gas levels at the Earth's surface.  Nature Geoscience. 22-+. 2020
• A large source of cloud condensation nuclei from new particle formation in the tropics.  Nature. 399-+. 2019
• Characterization of Organic Aerosol across the Global Remote Troposphere: A comparison of ATom measurements and global chemistry models 2019
• Supplementary material to "Characterization of Organic Aerosol across the Global Remote Troposphere: A comparison of ATom measurements and global chemistry models" 2019
• Atmospheric Acetaldehyde: Importance of Air-Sea Exchange and a Missing Source in the Remote Troposphere.  Geophysical Research Letters. 5601-5613. 2019
• SO2 Observations and Sources in the Western Pacific Tropical Tropopause Region.  Journal of Geophysical Research: Atmospheres. 13549-13559. 2018
• An unexpected and persistent increase in global emissions of ozone-depleting CFC-11.  Nature. 413-+. 2018
• Assessing stratospheric transport in the CMAM30 simulations using ACE-FTS measurements.  Atmospheric Chemistry and Physics. 6801-6828. 2018
• An aerosol particle containing enriched uranium encountered in the remote upper troposphere.  Journal of Environmental Radioactivity. 95-100. 2018
• Evaluation of stratospheric age of air from CF₄, C₂F₆, C₃F₈, CHF₃, HFC-125, HFC-227ea and SF₆; implications for the calculations of halocarbon lifetimes, fractional release factors and ozone depletion potentials.  Atmospheric Chemistry and Physics. 3369-3385. 2018
• Significant Contributions of Volcanic Aerosols to Decadal Changes in the Stratospheric Circulation.  Geophysical Research Letters. 10780-10791. 2017
• Efficient transport of tropospheric aerosol into the stratosphere via the Asian summer monsoon anticyclone.  Proceedings of the National Academy of Sciences of USA. 6972-6977. 2017
• Enhanced stratospheric water vapor over the summertime continental United States and the role of overshooting convection.  Atmospheric Chemistry and Physics. 6113-6124. 2017
• Quantification of the SF₆ lifetime based on mesospheric loss measured in the stratospheric polar vortex.  Journal of Geophysical Research: Atmospheres. 4626-4638. 2017
• Global distribution of CO₂ in the upper troposphere and stratosphere.  Atmospheric Chemistry and Physics. 3861-3878. 2017
• An idealized stratospheric model useful for understanding differences between long-lived trace gas measurements and global chemistry-climate model output.  Journal of Geophysical Research: Atmospheres. 5356-5367. 2016
• Improving stratospheric transport trend analysis based on SF₆ and CO₂ measurements.  Journal of Geophysical Research: Atmospheres. 14110-14128. 2014
• A Cost-Effective Trace Gas Measurement Program for Long-Term Monitoring of the Stratospheric Circulation.  Bulletin of the American Meteorological Society. 147-155. 2014
• Global-scale seasonally resolved black carbon vertical profiles over the Pacific.  Geophysical Research Letters. 5542-5547. 2013
• Tropospheric SF₆: Age of air from the Northern Hemisphere midlatitude surface.  Journal of Geophysical Research: Atmospheres. 11429-11441. 2013
• HIAPER Pole-to-Pole Observations (HIPPO): fine-grained, global-scale measurements of climatically important atmospheric gases and aerosols.  Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences. 2073-2086. 2011
• Stratospheric water vapor trends over Boulder, Colorado: Analysis of the 30 year Boulder record.  Journal of Geophysical Research: Atmospheres. 2011
• Jet characterization in the upper troposphere/lower stratosphere (UTLS): applications to climatology and transport studies.  Atmospheric Chemistry and Physics. 6115-6137. 2011
• On the structural changes in the Brewer-Dobson circulation after 2000.  Atmospheric Chemistry and Physics. 3937-3948. 2011
• Evidence for changes in stratospheric transport and mixing over the past three decades based on multiple data sets and tropical leaky pipe analysis.  Journal of Geophysical Research: Atmospheres. 2010
• Low-ozone bubbles observed in the tropical tropopause layer during the TC4 campaign in 2007.  Journal of Geophysical Research: Atmospheres. 2010
• A model study of gravity waves over Hurricane Humberto (2001).  Journal of the Atmospheric Sciences. 3231-3246. 2008
• Measurements of trace gases in the tropical tropopause layer.  Atmospheric Environment. 7253-7261. 2007
• Hydration of the upper troposphere by tropical cyclones.  Journal of Geophysical Research: Atmospheres. 2007
• High-resolution airborne profiles of CH₄, O₃, and water vapor near tropical Central America in late January to early February 2004.  Journal of Geophysical Research: Atmospheres. 2006
• Ozone loss derived from balloon-borne tracer measurements in the 1999/2000 Arctic winter.  Atmospheric Chemistry and Physics. 1423-1436. 2005
• Evidence of the effect of summertime midlatitude convection on the subtropical lower stratosphere from CRYSTAL-FACE tracer measurements.  Journal of Geophysical Research: Atmospheres. 2004
• Distributions of ozone in the region of the subtropical jet: An analysis of in situ aircraft measurements.  Journal of Geophysical Research: Atmospheres. 2004
• Quantifying stratospheric ozone in the upper troposphere with in situ measurements of HCl.  Science. 261-265. 2004
• Horizontal variability 1-2 km below the tropical tropopause.  Journal of Geophysical Research: Atmospheres. 2004
• Convective transport of reactive constituents to the tropical and rigid-latitude tropopause region: I. Observations.  Atmospheric Environment. 1259-1274. 2004
• Large-scale equatorward transport of ozone in the subtropical lower stratosphere.  Journal of Geophysical Research: Atmospheres. 2003
• Balloonborne in situ gas chromatograph for measurements in the troposphere and stratosphere.  Journal of Geophysical Research: Atmospheres. 2003
• Role of NOy as a diagnostic of small-scale mixing in a denitrified polar vortex.  Journal of Geophysical Research: Atmospheres. 2002
• Global tracer modeling during SOLVE: High-latitude descent and mixing.  Journal of Geophysical Research: Atmospheres. 2002
• Chemical depletion of Arctic ozone in winter 1999/2000.  Journal of Geophysical Research. 2002
• Chemical loss of ozone during the Arctic winter of 1999/2000: An analysis based on balloon-borne observations.  Journal of Geophysical Research: Atmospheres. 2002
• Descent and mixing in the 1999-2000 northern polar vortex inferred from in situ tracer measurements.  Journal of Geophysical Research: Atmospheres. 2002
• Tracer-based determination of vortex descent in the 1999/2000 Arctic winter.  Journal of Geophysical Research: Atmospheres. 2002
• Transport of ozone-depleted air on the breakup of the stratospheric polar vortex in spring/summer 2000.  Journal of Geophysical Research. 2002
• Mean ages of stratospheric air derived from in situ observations of CO₂, CH₄, and N₂O.  Journal of Geophysical Research: Atmospheres. 32295-32314. 2001
• In situ measurements of HNO3, NOy, NO, and O-3 in the lower stratosphere and upper troposphere.  Atmospheric Environment. 5789-5797. 2001
• Severe chemical ozone loss inside the Arctic Polar Vortex during winter 1999-2000 inferred from in-situ airborne measurements (vol 28, pg 2197, 2001).  Geophysical Research Letters. 3167-3167. 2001
• Severe chemical ozone loss inside the Arctic polar vortex during winter 1999-2000 inferred from in situ airborne measurements.  Geophysical Research Letters. 2197-2200. 2001
• Transport into the Northern Hemisphere lowermost stratosphere revealed by in situ tracer measurements.  Journal of Geophysical Research: Atmospheres. 26565-26580. 1999
• Vertical velocity, vertical diffusion, and dilution by midlatitude air in the tropical lower stratosphere.  Journal of Geophysical Research: Atmospheres. 8651-8666. 1998
• An analysis of the structure and forcing of the equatorial semiannual oscillation in zonal wind.  Journal of Geophysical Research: Atmospheres. 1759-1774. 1998
• THE TROPICAL SEMIANNUAL OSCILLATIONS IN TEMPERATURE AND OZONE AS OBSERVED BY THE MLS.  Journal of the Atmospheric Sciences. 3045-3052. 1994