• Characterizing 15 Years of Saharan-like, Dry, Well-Mixed Air Layers in North Africa 

  Nicholls, Stephen D.; Mohr, Karen I.; Shi, Jainn J.; Braun, Scott A. (NASA Technical Reports Server, 2020-01-13)

  The Saharan Air Layer (SAL) is a dry, well-mixed layer (WML) of warm and sometimes dusty air of nearly constant water vapor mixing ratio generated by the intense surface heating and strong, dry convection in the Sahara ...

• Modeling Cloud Reflectance Fields using Conditional Generative Adversarial Networks 

  Schmidt, Victor; Alghali, Mustafa; Sankaran, Kris; Bengio, Yoshua; Yuan, Tianle (2020-02-10)

  We introduce a conditional Generative Adversarial Network (cGAN) approach to generate cloud reflectance fields (CRFs) conditioned on large scale meteorological variables such as sea surface temperature and relative humidity. ...

• A machine learning examination of hydroxyl radical differences among model simulations for CCMI-1 

  Nicely, Julie M.; Duncan, Bryan N.; Hanisco, Thomas F.; Wolfe, Glenn M.; Salawitch, Ross J.; Deushi, Makoto; Haslerud, Amund S.; Jöckel, Patrick; Josse, Béatrice; Kinnison, Douglas E.; Klekociuk, Andrew; Manyin, Michael E.; Marécal, Virginie; Morgenstern, Olaf; Murray, Lee T.; Myhre, Gunnar; Oman, Luke D.; Pitari, Giovanni; Pozzer, Andrea; Quaglia, Ilaria; Revell, Laura E.; Rozanov, Eugene; Stenke, Andrea; Stone, Kane; Strahan, Susan; Tilmes, Simone; Tost, Holger; Westervelt, Daniel M.; Zeng, Guang (EGU Publications, 2020-02-05)

  The hydroxyl radical (OH) plays critical roles within the troposphere, such as determining the lifetime of methane (CH₄), yet is challenging to model due to its fast cycling and dependence on a multitude of sources and ...

• An Update on Global Satellite-Based Precipitation Products and Services at NASA GES DISC 

  Liu, Zhong; Savtchenko, A.; Ostrenga, D.; DeShong, B.; Fang, F.; Greene, M.; Albayrak, R.; Huwe, P.; Su, J.; Shie, C.-L.; Adams, J.; Acker, J.; Li, A.; Teng, W.; Wei, J.; Lei, Guang-Dih; Meyer, D. (NASA Technical Reports Server, 2020-01-12)

  The NASA Goddard Earth Sciences Data and Information Services Center (GES DISC) is home to major NASA satellite precipitation measurement missions including the Tropical Rainfall Measuring Mission (TRMM) and the Global ...

• Development and Evaluation of the Raindrop Size Distribution Parameters for the NASA Global Precipitation Measurement Mission Ground Validation Program 

  Tokay, Ali; D’Adderio, Leo Pio; Wolff, David B.; Petersen, Walter A. (American Meteorological Society, 2019-11-01)

  The National Aeronautics and Space Administration Global Precipitation Measurement (GPM) mission ground validation program uses dual-polarization radar moments to estimate raindrop size distribution (DSD) parameters, the ...

• Spatial distribution of cloud droplet size properties from Airborne Hyper-Angular Rainbow Polarimeter (AirHARP) measurements 

  McBride, Brent A.; Martins, J. Vanderlei; Barbosa, Henrique M.J.; Birmingham, William; Remer, Lorraine A. (EGU Publications, 2019-10-23)

  The global variability of clouds and their interactions with aerosol and radiation make them one of our largest uncertainties related to global radiative forcing. The droplet size distribution (DSD) of clouds is an excellent ...

• Cloud Detection over Snow and Ice with Oxygen A- and B-band Observations from the Earth Polychromatic Imaging Camera (EPIC) 

  Zhou, Yaping; Yang, Yuekui; Gao, Meng; Zhai, Peng-Wang (EGU Publications, 2019-10-21)

  Satellite cloud detection over snow and ice has been difficult for passive remote sensing instruments due to the lack of contrast between clouds and the bright and cold surfaces; cloud mask algorithms often heavily rely ...

• The Plankton, Aerosol, Cloud, Ocean Ecosystem Mission: Status, Science, Advances 

  Werdell, P. Jeremy; Behrenfeld, Michael J.; Bontempi, Paula S.; Boss, Emmanuel; Cairns, Brian; Davis, Gary T.; Franz, Bryan A.; Gliese, Ulrik B.; Gorman, Eric T.; Hasekamp, Otto; Knobelspiesse, Kirk D.; Mannino, Antonio; Martins, J. Vanderlei; McClain, Charles R.; Meister, Gerhard; Remer, Lorraine A. (American Meteorological Society, 2019-09-27)

  The Plankton, Aerosol, Cloud, Ocean Ecosystem (PACE) mission represents the National Aeronautics and Space Administration’s (NASA) next investment in satellite ocean color and the study of Earth’s ocean–atmosphere system, ...

• Continuing the MODIS Dark Target Aerosol Time Series with VIIRS 

  Sawyer, Virginia; Levy, Robert C.; Mattoo, Shana; Cureton, Geoff; Shi, Yingxi; Remer, Lorraine A. (MDPI, 2020-01-17)

  For reflected sunlight observed from space at visible and near-infrared wavelengths, particles suspended in Earth’s atmosphere provide contrast with vegetation or dark water at the surface. This is the physical motivation ...

• Using networked Pandora observations to capture spatiotemporal changes in total column ozone associated with stratosphere-to-troposphere transport 

  Robinson, J.; Kotsakis, A.; Santos, F.; Swap, R.; Knowland, K.E.; Labow, G.; Connors, V.; Tzortziou, M.; Abuhassan, N.; Tiefengraber, M.; Cede, A. (Elsevier, 2020-01-21)

  Accurately capturing the evolution of episodic stratosphere-to-troposphere transport is critical due to the potential impacts on both climate and air quality. Until now, investigating associated spatiotemporal gradients ...

• Exploring Oxidation in the Remote Free Troposphere: Insights From Atmospheric Tomography (ATom) 

  Brune, W. H.; Miller, D. O.; Thames, A. B.; Allen, H. M.; Apel, E. C.; Blake, D. R.; Bui, T. P.; Commane, R.; Crounse, J. D.; Daube, B. C.; Diskin, G. S.; DiGangi, J. P.; Elkins, J. W.; Hall, S. R.; Hanisco, T. F.; Hannun, R. A.; Hintsa, E. J.; Hornbrook, R. S.; Kim, M. J.; McKain, K.; Moore, F. L.; Neuman, J. A.; Nicely, J. M.; Peischl, J.; Ryerson, T. B.; Clair, J. M. St.; Sweeney, C.; Teng, A. P.; Thompson, C.; Ullmann, K.; Veres, P. R.; Wennberg, P. O.; Wolfe, G. M. (AGU, 2019-12-27)

  Earth's atmosphere oxidizes the greenhouse gas methane and other gases, thus determining their lifetimes and oxidation products. Much of this oxidation occurs in the remote, relatively clean free troposphere above the ...

• 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 ...

• Daytime Top-of-the-Atmosphere Cirrus Cloud Radiative Forcing Properties at Singapore 

  Lolli, S.; Campbell, J. R.; Welton, E. J.; Lewis, J. R. (National Aeronautics and Space Administration, 2017)

• Overview of the New Version 3 NASA Micro-Pulse Lidar Network (MPLNET) Automatic Precipitation Detection Algorithm 

  Lolli, Simone; Vivone, Gemine; Lewis, Jasper R.; Sicard, Michaël; Welton, Ellsworth J.; Campbell, James R.; Comerón, Adolfo; D’Adderio, Leo Pio; Tokay, Ali; Giunta, Aldo; Pappalardo, Gelsomina (MDPI, 2019-12-24)

  Precipitation modifies atmospheric column thermodynamics through the process of evaporation and serves as a proxy for latent heat modulation. For this reason, a correct precipitation parameterization (especially for ...

• 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 ...

• Evaporation From the Southern Ocean Estimatedon the Basis of AIRS Satellite Data 

  Boisvert, Linette; Vihma, Timo; Shie, Chung‐Lin (American Geophysical Union, 2019-12-19)

  Evaporation plays an important role in the global water and energy cycles and, hence, in climate change. Evaporation over the Southern Ocean, where the Antarctic sea ice coverage has a large annual cycle, is poorly quantified. ...

• 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, ...

• 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 ...

• Transitioning the NASA SLR network to Event Timing Mode for reduced systematics, improved stability and data precision 

  Varghese, Thomas; Ricklefs, Randall L.; Pavlis, Erricos C.; Kuzmicz-Cieslak, Magdalena; Merkowitz, Stephen M. (Springer Berlin Heidelberg, 2019-11-21)

  NASA’s legacy Satellite Laser Ranging (SLR) network produces about one-third of the global SLR data to support space geodesy. This network of globally distributed stations has been using Time Interval Units (TIU) for range ...

• Understanding the Various Perspectives of Earth Science Observational Data Uncertainty 

  Moroni, David F.; Ramapriyan, Hampapuram; Peng, Ge; Hobbs, Jonathan; Goldstein, Justin C.; Downs, Robert R.; Wolfe, Robert; Shie, Chung-Lin; Merchant, Christopher J.; Bourassa, Mark; Matthews, Jessica L.; Cornillon, Peter; Bastin, Lucy; Kehoe, Kenneth; Smith, Benjamin; Privette, Jeffrey L.; Subramanian, Aneesh C.; Brown, Otis; Ivánová, Ivana (2019-08-11)

  Information about the uncertainty associated with Earth science observational data is fundamental to use, re-use, and overall evaluation of the data being used to produce science and support decision making. The associated ...

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