Now showing items 1-20 of 144

    • Advancements in the Aerosol Robotic Network (AERONET) Version 3 database – automated near-real-time quality control algorithm with improved cloud screening for Sun photometer aerosol optical depth (AOD) measurements 

      Giles, David M.; Sinyuk, Alexander; Sorokin, Mikhail G.; Schafer, Joel S.; Smirnov, Alexander; Slutsker, Ilya; Eck, Thomas F.; Holben, Brent N.; Lewis, Jasper R.; Campbell, James R.; Welton, Ellsworth J.; Korkin, Sergey V.; Lyapustin, Alexei I. (Copernicus Publications on behalf of the European Geosciences Union, 2019-01-11)
      The Aerosol Robotic Network (AERONET) has provided highly accurate, ground-truth measurements of the aerosol optical depth (AOD) using Cimel Electronique Sun–sky radiometers for more than 25 years. In Version 2 (V2) of the ...
    • Agricultural fires in the southeastern U.S. during SEAC⁴RS: Emissions of trace gases and particles and evolution of ozone, reactive nitrogen, and organic aerosol 

      Liu, Xiaoxi; Zhang, Y.; Huey, L. G.; Yokelson, R.J.; Wang, Y.; Jimenez, J. L.; Campuzano-Jost, P.; Beyersdorf, A.J.; Blake, D.R.; Choi, Y.; St. Clair, J. M.; Crounse, J.D.; Day, D. A.; Diskin, G.S.; Fried, A.; Hall, S. R.; Hanisco, T. F.; King, L. E.; Meinardi, S.; Mikoviny, T.; Palm, B. B.; Peischl, J.; Perring, A. E.; Pollack, I. B.; Ryerson, T. B.; Sachse, G.; Schwarz, J. P.; Simpson, I. J.; Tanner, D. J.; Thornhill, K. L.; Ullmann, K.; Weber, R. J.; Wennberg, P. O.; Wisthaler, A.; Wolfe, G. M.; Ziemba, L. D. (AGU Pubication, 2016-05-28)
      Emissions from 15 agricultural fires in the southeastern U.S. were measured from the NASA DC‐8 research aircraft during the summer 2013 Studies of Emissions and Atmospheric Composition, Clouds and Climate Coupling by ...
    • Airborne measurements of organosulfates over the continental U.S 

      Liao, Jin; Froyd, Karl D.; Murphy, Daniel M.; Keutsch, Frank N.; Yu, Ge; Wennberg, Paul O.; St. Clair, Jason M.; Crounse, John D.; Wisthaler, Armin; Mikoviny, Tomas; Jimenez, Jose L.; Campuzano-Jost, Pedro; Day, Douglas A.; Hu, Weiwei; Ryerson, Thomas B.; Pollack, Ilana B.; Peischl, Jeff; Anderson, Bruce E.; Ziemba, Luke D.; Blake, Donald R.; Meinardi, Simone; Diskin, Glenn (AGU Pubication, 2015-02-28)
      Organosulfates are important secondary organic aerosol (SOA) components and good tracers for aerosol heterogeneous reactions. However, the knowledge of their spatial distribution, formation conditions, and environmental ...
    • Airborne measurements of western U.S. wildfire emissions: Comparison with prescribed burning and air quality implications 

      Liu, Xiaoxi; Huey, L. Gregory; Yokelson, Robert J.; Selimovic, Vanessa; Simpson, Isobel J.; Müller, Markus; Jimenez, Jose L.; Campuzano‐Jost, Pedro; Beyersdorf, Andreas J.; Blake, Donald R.; Zachary, Butterfield; Choi, Yonghoon; Crounse, John D.; Day, Douglas A.; Diskin, Glenn S.; Dubey, Manvendra K.; Edward, Fortner; Hanisco, Thomas F.; Hu, Weiwei; King, Laura E.; Kleinman, Lawrence; Meinardi, Simone; Mikoviny, Tomas; Onasch, Timothy B.; Palm, Brett B.; Peischl, Jeff; Pollack, Ilana B.; Ryerson, Thomas B.; Sachse, Glen W.; Sedlacek, Arthur J.; Shilling, John E.; Springston, Stephen; St. Clair, Jason M.; Tanner, David J.; Teng, Alexander P.; Wennberg, Paul O.; Wisthaler, Armin; Wolfe, Glenn M. (AGU Pubication, 2017-06-14)
      Wildfires emit significant amounts of pollutants that degrade air quality. Plumes from three wildfires in the western U.S. were measured from aircraft during the Studies of Emissions and Atmospheric Composition, Clouds and ...
    • AIRS L1c Frequency Calibration 

      UMBC Atmospheric Spectroscopy Lab (ASL) (2019-11-03)
      This document summarizes the observed frequency drifts in the AIRS L1b radiances and then describes how they are corrected in the AIRS L1c product that should be available at the NASA Goddard DISC in early 2010. The ...
    • An analysis of fast photochemistry over high northern latitudes during spring and summer using in-situ observations from ARCTAS and TOPSE 

      Olson, J. R.; Crawford, J. H.; Brune, W.; Mao, J.; Ren, X.; Fried, A.; Anderson, B.; Apel, E.; Beaver, M.; Blake, D.; Chen, G.; Crounse, J.; Dibb, J.; Diskin, G.; Hall, S. R.; Huey, L. G.; Knapp, D.; Richter, D.; Riemer, D.; St. Clair, J.; Ullmann, K.; Walega, J.; Weibring, P.; Weinheimer, A.; Wennberg, P.; Wisthaler, A. (Copernicus Publications, 2012-08-01)
      Observations of chemical constituents and meteorological quantities obtained during the two Arctic phases of the airborne campaign ARCTAS (Arctic Research of the Composition of the Troposphere from Aircraft and Satellites) ...
    • Anthropogenic control over wintertime oxidation of atmospheric pollutants 

      Haskins, J.D.; Lopez‐Hilfiker, F. D.; Lee, B. H.; Shah, V.; Wolfe, G. M.; DiGangi, J.; Fibiger, D.; McDuffie, E. E.; Veres, P.; Schroder, J. C.; Campuzano‐Jost, P.; Day, D. A.; Jimenez, J. L.; Weinheimer, A.; Sparks, T.; Cohen, R. C.; Campos, T.; Sullivan, A.; Guo, H.; Weber, R.; Dibb, J.; Green, J.; Fiddler, M.; Bililign, S.; Jaeglé, L.; Brown, S. S.; Thornton, J. A. (American Geophysical Union, 2019-12-13)
      During winter in the midlatitudes, photochemical oxidation is significantly slower than in summer and the main radical oxidants driving formation of secondary pollutants, such as fine particulate matter and ozone, remain ...
    • Applying the Dark Target aerosol algorithm with Advanced Himawari Imager observations during the KORUS-AQ field campaign 

      Gupta, Pawan; Levy, Robert C.; Mattoo, Shana; Remer, Lorraine A.; Holz, Robert E.; Heidinger, Andrew K. (EGU, 2019-12-11)
      For nearly 2 decades we have been quantitatively observing the Earth's aerosol system from space at one or two times of the day by applying the Dark Target family of algorithms to polar-orbiting satellite sensors, particularly ...
    • Artificial Intelligence Based Cloud Distributor (AI-CD): Probing Low Cloud Distribution with a Conditional Generative Adversarial Network 

      Yuan, Tianle (2019-05-21)
      Here we introduce the artificial intelligence-based cloud distributor (AI-CD) approach to generate two-dimensional (2D) marine low cloud reflectance fields. AI-CD uses a conditional generative adversarial net (cGAN) ...
    • Asian and Trans‐Pacific Dust: A Multimodel and Multiremote Sensing Observation Analysis 

      Kim, Dongchul; Chin, Mian; Yu, Hongbin; Pan, Xiaohua; Bian, Huisheng; Tan, Qian; Kahn, Ralph A.; Tsigaridis, Kostas; Bauer, Susanne E.; Takemura, Toshihiko; Pozzoli, Luca; Bellouin, Nicolas; Schulz, Michael (American Geophysical Union, 2019-12-06)
      Dust is one of the dominant aerosol types over Asia and the North Pacific Ocean, but quantitative estimation of dust distribution and its contribution to the total regional aerosol load from observations is challenging due ...
    • Assessing Climate Impacts on Regional Water Resources in the Midwestern US 

      Emelike, Joseph U.; Harper, David; Mann, Charlotte Z.; Boaitey, Kwame Owusu; Popuri, Sai K.; Neerchal, Nagaraj K.; Mehta, Amita (2015)
      It is well documented that decadal climate variability (DCV) has a signi cant impact on water resources in the Missouri River Basin (MRB). This project aims to utilize multi-decadal simulations of Global Climate Models ...
    • Assessing NO2 Concentration and Model Uncertainty with High Spatiotemporal Resolution across the Contiguous United States Using Ensemble Model Averaging 

      Di, Qian; Amini, Heresh; Shi, Liuhua; Kloog, Itai; Silvern, Rachel; Kelly, James; Sabath, M. Benjamin; Choirat, Christine; Koutrakis, Petros; Lyapustin, Alexei; Wang, Yujie; Mickley, Loretta J.; Schwartz, Joel (ACS Publications, 2019-12-18)
      NO₂ is a combustion byproduct that has been associated with multiple adverse health outcomes. To assess NO₂ levels with high accuracy, we propose the use of an ensemble model to integrate multiple machine learning algorithms, ...
    • Assessing Water Budget Sensitivity to Precipitation Forcing Errors in Potomac River Basin Using the VIC Hydrologic Model CyberTraining: Big Data + High-Performance Computing + Atmospheric Sciences 

      Majumder, Reetam; Walid, Redwan; Zheng, Jianyu (2019)
      The Potomac River Basin is a watershed located on the East Coast of the USA across West Virginia, Virginia, Pennsylvania, Maryland, and the District of Columbia. Inter-annual variations in precipitation makes it challenging ...
    • Assimilation of lidar back-scatter and wind retrievals of planetary boundary layer height into WRF atmospheric forecast states 

      Tangborn, Andrew; Demoz, Belay; Carroll, Brian J.; Santanello, Joseph A.; Anderson, Jeffrey L. (Copernicus Publications, 2020-04-29)
      Lidar backscatter and wind retrievals of the planetary boundary layer height (PBLH) are assimilated into forecasts from the NASA Unified - Weather and Research Forecast (NU-WRF) model during the Plains Elevated Convection ...
    • Atmospheric Acetaldehyde: Importance of Air‐Sea Exchange and a Missing Source in the Remote Troposphere 

      Wang, Siyuan; Hornbrook, Rebecca S.; Hills, Alan; Emmons, Louisa K.; Tilmes, Simone; Lamarque, Jean‐François; Jimenez, Jose L.; Campuzano‐Jost, Pedro; Nault, Benjamin A.; Crounse, John D.; Wennberg, Paul O.; Kim, Michelle; Allen, Hannah; Ryerson, Thomas B.; Thompson, Chelsea R.; Peischl, Jeff; Moore, Fred; Nance, David; Hall, Brad; Elkins, James; Tanner, David; Huey, L. Gregory; Hall, Samuel R.; Ullmann, Kirk; Orlando, John J.; Tyndall, Geoff S.; Flocke, Frank M.; Ray, Eric; Hanisco, Thomas F.; Wolfe, Glenn M.; Clair, Jason St.; Commane, Róisín; Daube, Bruce; Barletta, Barbara; Blake, Donald R.; Weinzierl, Bernadett; Dollner, Maximilian; Conley, Andrew; Vitt, Francis; Wofsy, Steven C.; Riemer, Daniel D.; Apel, Eric C. (American Geophysical Union, 2019-05-28)
      Abstract We report airborne measurements of acetaldehyde (CH₃CHO) during the first and second deployments of the National Aeronautics and Space Administration Atmospheric Tomography Mission (ATom). The budget of CH₃CHO ...
    • Atmospheric Correction of Satellite Ocean-Color Imagery During the PACE Era 

      Frouin, Robert J.; Franz, Bryan A.; Ibrahim, Amir; Knobelspiesse, Kirk D.; Ahmad, Ziauddin; Cairns, Brian; Chowdhary, Jacek; Dierssen, Heidi M.; Tan, Jing; Dubovik, Oleg; Huang, Xin; Davis, Anthony B.; Kalashnikova, Olga; Thompson, David R.; Remer, Lorraine Ann; Boss, Emmanuel; Coddington, Odele; Deschamps, Pierre-Yves; Gao, Bo-Cai; Gross, Lydwine; Hasekamp, Otto; Omar, Ali; Pelletier, Bruno; Ramon, Didier; Steinmetz, François; Zhai, Peng-wang (Frontiers, 2019-07-26)
      The Plankton, Aerosol, Cloud, ocean Ecosystem (PACE) mission will carry into space the Ocean Color Instrument (OCI), a spectrometer measuring at 5 nm spectral resolution in the ultraviolet (UV) to near infrared (NIR) with ...
    • An Automated Detection Methodology for Dry Well-Mixed Layers 

      Nicholls, Stephen D.; Mohr, Karen I. (American Meteorological Society, 2019-04-25)
      The intense surface heating over arid land surfaces produces dry well-mixed layers (WML) via dry convection. These layers are characterized by nearly constant potential temperature and low, nearly constant water vapor ...
    • Benchmarking Parallel K-Means Cloud Type Clustering from Satellite Data 

      Barajas, Carlos; Guo, Pei; Mukherjee, Lipi; Hoban, Susan; Wang, Jianwu; Jin, Daeho; Gangopadhyay, Aryya; Gobbert, Matthias K. (Springer, Cham, 2019-10-08)
      The study of clouds, i.e., where they occur and what are their characteristics, plays a key role in the understanding of climate change. Clustering is a common machine learning technique used in atmospheric science to ...
    • CAFE: a new, improved non-resonant laser-induced fluorescence instrument for airborne in situ measurement of formaldehyde 

      Clair, Jason M. St.; Swanson, Andrew K.; Bailey, Steven A.; Hanisco, Thomas F. (Copernicus Publications, 2019-08-30)
      NASA Compact Airborne Formaldehyde Experiment (CAFE) is a nonresonant laser-induced fluorescence instrument for airborne in situ measurement of formaldehyde (HCHO). The instrument is described here with highlighted improvements ...
    • Characterization of a real-time tracer for isoprene epoxydiols-derived secondary organic aerosol (IEPOX-SOA) from aerosol mass spectrometer measurements 

      Hu, W. W.; Campuzano-Jost, P.; Palm, B. B.; Day, D. A.; Ortega, A. M.; Hayes, P. L.; Krechmer, J. E.; Chen, Q.; Kuwata, M.; Liu, Y. J.; Sá, S. S. de; McKinney, K.; Martin, S. T.; Hu, M.; Budisulistiorini, S. H.; Riva, M.; Surratt, J. D.; St. Clair, J. M.; Wertz, G. Isaacman-Van; Yee, L. D.; Goldstein, A. H.; Carbone, S.; Brito, J.; Artaxo, P.; Gouw, J. A. de; Koss, A.; Wisthaler, A.; Mikoviny, T.; Karl, T.; Kaser, L.; Jud, W.; Hansel, A.; Docherty, K. S.; Alexander, M. L.; Robinson, N. H.; Coe, H.; Allan, J. D.; Canagaratna, M. R.; Paulot, F.; Jimenez, J. L. (Copernicus Publications, 2015-10-23)
      Substantial amounts of secondary organic aerosol (SOA) can be formed from isoprene epoxydiols (IEPOX), which are oxidation products of isoprene mainly under low-NO conditions. Total IEPOX-SOA, which may include SOA formed ...