Search Results

• • 38 

    Academic Journals

  • Sort by: sorttype.publication.date.desc Newest sorttype.publication.date.asc Oldest sorttype.relevance Relevance

• How well can inverse analyses of high-resolution satellite data resolve heterogeneous methane fluxes? Observing system simulation experiments with the GEOS-Chem adjoint model (v35).

  Authors:Xueying Yu, Dylan B. Millet, and Daven K. HenzeFrom:Geoscientific Model Development (Vol. 14, Issue 12) Peer-Reviewed

  Dec. 23, 2021409 words Article We perform observing system simulation experiments (OSSEs) with the GEOS-Chem adjoint model to test how well methane emissions over North America can be resolved using measurements from the TROPOspheric Monitoring...

• Societal shifts due to COVID-19 reveal large-scale complexities and feedbacks between atmospheric chemistry and climate change.

  Authors:Joshua L. Laughner, Jessica L. Neu, David Schimel, Paul O. Wennberg, Kelley Barsanti, Kevin W. Bowman, et al.From:Proceedings of the National Academy of Sciences of the United States (Vol. 118, Issue 46) Peer-Reviewed

  Nov. 16, 202112,085 words Report 1480L

   Abstract Only

• The influence of air quality model resolution on health impact assessment for fine particulate matter and its components

  Authors:Ying Li, Daven K. Henze, Darby Jack, and Patrick L. KinneyFrom:Air Quality, Atmosphere & Health (Vol. 9, Issue 1)

  Feb. 2016334 words Report

   Abstract Only

• A multiphase CMAQ version 5.0 adjoint.

  Authors:Shunliu Zhao, Matthew G. Russell, Amir Hakami, Shannon L. Capps, Matthew D. Turner, Daven K. Henze, et al.From:Geoscientific Model Development (Vol. 13, Issue 7) Peer-Reviewed

  July 2, 2020317 words Brief article We present the development of a multiphase adjoint for the Community Multiscale Air Quality (CMAQ) model, a widely used chemical transport model. The adjoint model provides location- and time-specific gradients that can...

• Impacts of global NO.sub.x inversions on NO.sub.2 and ozone simulations.

  Authors:Zhen Qu, Daven K. Henze, Owen R. Cooper, and Jessica L. NeuFrom:Atmospheric Chemistry and Physics (Vol. 20, Issue 21) Peer-Reviewed

  Nov. 9, 2020414 words Article Tropospheric NO.sub.2 and ozone simulations have large uncertainties, but their biases, seasonality, and trends can be improved with NO.sub.2 assimilations. We perform global top-down estimates of monthly NO.sub.x...

• Impact of intercontinental pollution transport on North American ozone air pollution: an HTAP phase 2 multi-model study

  Authors:Min Huang, Gregory R. Carmichael, R. Bradley Pierce, Duseong S. Jo, Rokjin J. Park, Johannes Flemming, et al.From:Atmospheric Chemistry and Physics (Vol. 17, Issue 9) Peer-Reviewed

  May 8, 2017592 words Author abstract, Bri... The recent update on the US National Ambient Air Quality Standards (NAAQS) of the ground-level ozone (O.sub.3) can benefit from a better understanding of its source contributions in different US regions during recent...

• Inverse modeling of pan-Arctic methane emissions at high spatial resolution: what can we learn from assimilating satellite retrievals and using different process-based wetland and lake biogeochemical models?

  Authors:Zeli Tan, Qianlai Zhuang, Daven K. Henze, Christian Frankenberg, Ed Dlugokencky, Colm Sweeney, et al.From:Atmospheric Chemistry and Physics (Vol. 16, Issue 19) Peer-Reviewed

  Oct. 12, 2016259 words Brief article Understanding methane emissions from the Arctic, a fast-warming carbon reservoir, is important for projecting future changes in the global methane cycle. Here we optimized methane emissions from north of...

• Inverse modeling of SO.sub.2 and NO.sub.x emissions over China using multisensor satellite data - Part 2: Downscaling techniques for air quality analysis and forecasts.

  Authors:Yi Wang, Jun Wang, Meng Zhou, Daven K. Henze, Cui Ge, and Wei WangFrom:Atmospheric Chemistry and Physics (Vol. 20, Issue 11) Peer-Reviewed

  June 5, 2020683 words Article Top-down emission estimates provide valuable up-to-date information on pollution sources; however, the computational effort and spatial resolution of satellite products involved with developing these emissions often...

• A 15-year record of CO emissions constrained by MOPITT CO observations

  Authors:Zhe Jiang, John R. Worden, Helen Worden, Merritt Deeter, Dylan B. A. Jones, Avelino F. Arellano, et al.From:Atmospheric Chemistry and Physics (Vol. 17, Issue 7) Peer-Reviewed

  Apr. 6, 2017311 words Brief article Long-term measurements from satellites and surface stations have demonstrated a decreasing trend of tropospheric carbon monoxide (CO) in the Northern Hemisphere over the past decade. Likely explanations for this...

• Secondary organic aerosols from anthropogenic volatile organic compounds contribute substantially to air pollution mortality.

  Authors:Benjamin A. Nault, Duseong S. Jo, Brian C. McDonald, Pedro Campuzano-Jost, Douglas A. Day, Weiwei Hu, et al.From:Atmospheric Chemistry and Physics (Vol. 21, Issue 14) Peer-Reviewed

  July 27, 2021283 words Brief article Anthropogenic secondary organic aerosol (ASOA), formed from anthropogenic emissions of organic compounds, constitutes a substantial fraction of the mass of submicron aerosol in populated areas around the world and...

• Long-term observational constraints of organic aerosol dependence on inorganic species in the southeast US.

  Authors:Yiqi Zheng, Joel A. Thornton, Nga Lee Ng, Hansen Cao, Daven K. Henze, Erin E. McDuffie, et al.From:Atmospheric Chemistry and Physics (Vol. 20, Issue 21) Peer-Reviewed

  Nov. 9, 2020243 words Brief article Organic aerosol (OA), with a large biogenic fraction in the summertime southeast US, adversely impacts air quality and human health. Stringent air quality controls have recently reduced anthropogenic pollutants including...

• Constraints on methane emissions in North America from future geostationary remote-sensing measurements

  Authors:Nicolas Bousserez, Daven K. Henze, Brigitte Rooney, Andre Perkins, Kevin J. Wecht, Alexander J. Turner, et al.From:Atmospheric Chemistry and Physics (Vol. 16, Issue 10) Peer-Reviewed

  May 20, 2016363 words Brief article The success of future geostationary (GEO) satellite observation missions depends on our ability to design instruments that address their key scientific objectives. In this study, an Observation System Simulation...

• Impacts of anthropogenic and natural sources on free tropospheric ozone over the Middle East

  Authors:Zhe Jiang, Kazuyuki Miyazaki, John R. Worden, Jane J. Liu, Dylan B. A. Jones, and Daven K. HenzeFrom:Atmospheric Chemistry and Physics (Vol. 16, Issue 10) Peer-Reviewed

  May 27, 2016237 words Brief article Significant progress has been made in identifying the influence of different processes and emissions on the summertime enhancements of free tropospheric ozone (O.sub.3) at northern midlatitude regions. However, the...

• Aircraft-based inversions quantify the importance of wetlands and livestock for Upper Midwest methane emissions.

  Authors:Xueying Yu, Dylan B. Millet, Kelley C. Wells, Daven K. Henze, Hansen Cao, Timothy J. Griffis, et al.From:Atmospheric Chemistry and Physics (Vol. 21, Issue 2) Peer-Reviewed

  Jan. 25, 2021339 words Brief article We apply airborne measurements across three seasons (summer, winter and spring 2017-2018) in a multi-inversion framework to quantify methane emissions from the US Corn Belt and Upper Midwest, a key agricultural and...

• Transient climate and ambient health impacts due to national solid fuel cookstove emissions

  Authors:Forrest G. Lacey, Daven K. Henze, Colin J. Lee, Aaron van Donkelaar, and Randall V. MartinFrom:Proceedings of the National Academy of Sciences of the United States (Vol. 114, Issue 6) Peer-Reviewed

  Feb. 7, 20175,442 words Report 1670L

   Citation Only

• Unexpected slowdown of US pollutant emission reduction in the past decade

  Authors:Zhe Jiang, Brian C. McDonald, Helen Worden, John R. Worden, Kazuyuki Miyazaki, Zhen Qu, et al.From:Proceedings of the National Academy of Sciences of the United States (Vol. 115, Issue 20) Peer-Reviewed

  May 15, 20185,247 words Article 1600L

   Abstract Only

• Effects of a priori profile shape assumptions on comparisons between satellite NO.sub.2 columns and model simulations.

  Authors:Matthew J. Cooper, Randall V. Martin, Daven K. Henze, and Dylan B. A. JonesFrom:Atmospheric Chemistry and Physics (Vol. 20, Issue 12) Peer-Reviewed

  June 23, 2020255 words Brief article A critical step in satellite retrievals of trace gas columns is the calculation of the air mass factor (AMF) used to convert observed slant columns to vertical columns. This calculation requires a priori information on...

• Four-dimensional variational inversion of black carbon emissions during ARCTAS-CARB with WRFDA-Chem

  Authors:Jonathan J. Guerrette and Daven K. HenzeFrom:Atmospheric Chemistry and Physics (Vol. 17, Issue 12) Peer-Reviewed

  June 22, 2017401 words Brief article, Repor... Biomass burning emissions of atmospheric aerosols, including black carbon, are growing due to increased global drought, and comprise a large source of uncertainty in regional climate and air quality studies. We develop...

• Modeling the diurnal variability of agricultural ammonia in Bakersfield, California, during the CalNex campaign

  Authors:Chantelle R. Lonsdale, Jennifer D. Hegarty, Karen E. Cady-Pereira, Matthew J. Alvarado, Daven K. Henze, Matthew D. Turner, et al.From:Atmospheric Chemistry and Physics (Vol. 17, Issue 4) Peer-Reviewed

  Feb. 23, 2017485 words Brief article NH.sub.3 retrievals from the NASA Tropospheric Emission Spectrometer (TES), as well as surface and aircraft observations of NH.sub.3(g) and submicron NH.sub.4(p), are used to evaluate modeled concentrations of...

• Sources of springtime surface black carbon in the Arctic: an adjoint analysis for April 2008

  Authors:Ling Qi, Qinbin Li, Daven K. Henze, Hsien-Liang Tseng, and Cenlin HeFrom:Atmospheric Chemistry and Physics (Vol. 17, Issue 15) Peer-Reviewed

  Aug. 15, 2017391 words Author abstract, Bri... We quantify source contributions to springtime (April 2008) surface black carbon (BC) in the Arctic by interpreting surface observations of BC at five receptor sites (Denali, Barrow, Alert, Zeppelin, and...