The Joint Center for Earth Systems Technology (JCET) was formed under a Cooperative agreement between the Earth Science Division of NASA Goddard Space Flight Center (GSFC) and the University of Maryland, Baltimore County (UMBC) in 1995. The JCET family consists of its business staff, students, research faculty, GSFC Sponsors, appointed fellows and affiliated tenured/tenure-track faculty. JCET is an innovative center where these scientists interact in a seamless fashion with the support of an efficient business and administrative unit.

Recent Submissions

  • The Ozone Water–Land Environmental Transition Study: An Innovative Strategy for Understanding Chesapeake Bay Pollution Events 

    Sullivan, John T.; Berkoff, Timothy; Gronoff, Guillaume; Knepp, Travis; Pippin, Margaret; Allen, Danette; Twigg, Laurence; Swap, Robert; Tzortziou, Maria; Thompson, Anne M.; Stauffer, Ryan M.; Wolfe, Glenn; Flynn, James; Pusede, Sally E.; Judd, Laura M.; Moore, William; Baker, Barry D.; Al-Saadi, Jay; McGee, Thomas J. (American Meteorological Society, 2019-02-01)
    Coastal regions have historically represented a significant challenge for air quality investigations because of water–land boundary transition characteristics and a paucity of measurements available over water. Prior studies ...
  • 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, Jason St.; Sweeney, C.; Teng, A. P.; Thompson, C.; Ullmann, K.; Veres, P. R.; Wennberg, P. O.; Wolfe, Glenn (American Geophysical Union, 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 ...
  • Revisiting the effectiveness of HCHO/NO₂ ratios for inferring ozone sensitivity to its precursors using high resolution airborne remote sensing observations in a high ozone episode during the KORUS-AQ campaign 

    Souri, Amir H.; Nowlan, Caroline R.; Wolfe, Glenn; Lamsal, Lok N.; Chan Miller, Christopher E.; Abad, Gonzalo González; Janz, Scott J.; Fried, Alan; Blake, Donald R.; Weinheimer, Andrew J.; Diskin, Glenn S.; Liu, Xiong; Chance, Kelly (Elsevier, 2020-02-12)
    The nonlinear chemical processes involved in ozone production (P(O3₃) have necessitated using proxy indicators to convey information about the primary dependence of P(O₃) on volatile organic compounds (VOCs) or nitrogen ...
  • Constraining remote oxidation capacity with ATom observations 

    Travis, Katherine R.; Heald, Colette L.; Allen, Hannah M.; Apel, Eric C.; Arnold, Stephen R.; Blake, Donald R.; Brune, William H.; Chen, Xin; Commane, Róisín; Crounse, John D.; Daube, Bruce C.; Diskin, Glenn S.; Elkins, James W.; Evans, Mathew J.; Hall, Samuel R.; Hintsa, Eric J.; Hornbrook, Rebecca S.; Kasibhatla, Prasad S.; Kim, Michelle J.; Luo, Gan; McKain, Kathryn; Millet, Dylan B.; Moore, Fred L.; Peischl, Jeffrey; Ryerson, Thomas B.; Sherwen, Tomás; Thames, Alexander B.; Ullmann, Kirk; Wang, Xuan; Wennberg, Paul O.; Wolfe, Glenn; Yu, Fangqun (Copernicus Publications, 2020-07-03)
    The global oxidation capacity, defined as the tropospheric mean concentration of the hydroxyl radical (OH), controls the lifetime of reactive trace gases in the atmosphere such as methane and carbon monoxide (CO). Models ...
  • Wintertime Formaldehyde: Airborne Observations and Source Apportionment Over the Eastern United States 

    Green, Jaime R.; Fiddler, Marc N.; Fibiger, Dorothy L.; McDuffie, Erin E.; Aquino, Janine; Campos, Teresa; Shah, Viral; Jaeglé, Lyatt; Thornton, Joel A.; DiGangi, Joshua P.; Wolfe, Glenn; Bililign, Solomon; Brown, Steven S. (American Geophysical Union, 2021-01-12)
    Formaldehyde (HCHO) is generated from direct urban emission sources and secondary production from the photochemical reactions of urban smog. HCHO is linked to tropospheric ozone formation, and contributes to the photochemical ...
  • Spatial and temporal variability in the hydroxyl (OH) radical: understanding the role of large-scale climate features and their influence on OH through its dynamical and photochemical drivers 

    Anderson, Daniel C.; Duncan, Bryan N.; Fiore, Arlene M.; Baublitz, Colleen B.; Follette-Cook, Melanie B.; Nicely, Julie M.; Wolfe, Glenn (Copernicus Publications, 2021-04-30)
    The hydroxyl radical (OH) is the primary atmospheric oxidant responsible for removing many important trace gases, including methane, from the atmosphere. Although robust relationships between OH drivers and modes of climate ...
  • Secondary organic aerosols from anthropogenic volatile organic compounds contribute substantially to air pollution mortality 

    Nault, Benjamin A.; Jo, Duseong S.; McDonald, Brian C.; Campuzano-Jost, Pedro; Wolfe, Glenn; et al. (Copernicus Publications, 2021-07-27)
    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 contributes ...
  • Evolution of formaldehyde (HCHO) in a plume originating from a petrochemical industry and its volatile organic compounds (VOCs) emission rate estimation 

    Cho, Changmin; St. Clair, Jason; Liao, Jin; Wolfe, Glenn M.; Jeong, Seokhan; Kang, Dae il; Choi, Jinsoo; Shin, Myung-Hwan; Park, Jinsoo; Park, Jeong-Hoo; Fried, Alan; Weinheimer, Andrew; Blake, Donald R.; Diskin, Glenn S.; Ullmann, Kirk; Hall, Samuel R.; Brune, William H.; Hanisco, Thomas F.; Min, Kyung-Eun (University of California Press, 2021-08-04)
    Large industrial facilities, such as petrochemical complexes, have decisive effects on regional air quality: directly due to their own hazardous volatile organic compounds (VOCs) emissions and indirectly due to their ...
  • Snow Microphysical Retrieval from the NASA D3R Radar During ICE-POP 2018 

    Munchak, S. Joseph; Schrom, Robert S.; Helms, Charles N.; Tokay, Ali (Copernicus Publications, 2021-09-01)
    A method is developed to use both polarimetric and dual-frequency radar measurements to retrieve microphysical properties of falling snow. It is applied to the Ku- and Ka-band measurements of the NASA Dual-polarization, ...
  • Inferring iron oxides species content in atmospheric mineral dust from DSCOVR EPIC observations 

    Go, Sujung; Lyapustin, Alexei; Schuster, Gregory L.; Choi, Myungje; Ginoux, Paul; Chin, Mian; Kalashnikova, Olga; Dubovik, Oleg; Kim, Jhoon; Silva, Arlindo da; Holben, Brent; Reid, Jeffrey S. (Copernicus Publications, 2021-08-27)
    The iron-oxide content of dust in the atmosphere and most notably its apportionment between hematite (α-Fe2O3) and goethite (α-FeOOH) are key determinants in quantifying dust's light absorption, its top of atmosphere UV ...
  • CHIRP User Guide 

    Motteler, H. E.; Strow, L. L. (National Aeronautics and Space Administration, 2021-07-26)
  • Opportunistic Experiments to Constrain Aerosol Effective Radiative Forcing 

    Christensen, Matthew; Gettelman, Andrew; Cermak, Jan; Dagan, Guy; Diamond, Michael; Douglas, Alyson; Feingold, Graham; Glassmeier, Franziska; Goren, Tom; Grosvenor, Daniel; Gryspeerdt, Edward; Kahn, Ralph; Li, Zhanqing; Ma, Po-Lun; Malavelle, Florent; McCoy, Isabel; McCoy, Daniel; McFarquhar, Greg; Mülmenstädt, Johannes; Pal, Sandip; Possner, Anna; Povey, Adam; Quaas, Johannes; Rosenfeld, Daniel; Schmidt, Anja; Schrödner, Roland; Sorooshian, Armin; Stier, Philip; Toll, Velle; Watson-Parris, Duncan; Wood, Robert; Yang, Mingxi; Yuan, Tianle (Copernicus Publications, 2021-08-20)
    Aerosol-cloud interactions (ACI) are considered to be the most uncertain driver of present-day radiative forcing due to human activities. The non-linearity of cloud-state changes to aerosol perturbations make it challenging ...
  • A testbed for geomagnetic data assimilation 

    Gwirtz, K.; Morzfeld, M.; Kuang, W.; Tangborn, A. (Oxford University Press, 2021-08-14)
    Geomagnetic data assimilation merges past and present-day observations of the Earth’s magnetic field with numerical geodynamo models and the results are used to initialize forecasts. We present a new “proxy model” that can ...
  • Organized kinetic energy backscatter in the hurricane boundary layer from radar measurements 

    Sroka, Sydney; Guimond, Stephen (Cambridge University Press, 2021-08-11)
    The fluid mechanics of hurricanes strongly depends on boundary layer energetics due to the warm-core nature of the system with peak velocities located at lower levels. One barrier that has inhibited a more complete ...
  • Canopy reflectance models illustrate varying NDVI responses to change in high latitude ecosystems 

    Huemmrich, Karl Fred; Zesati, Sergio Vargas; Campbell, Petya; Tweedie, Craig (Ecological Society of America, 2021-08-09)
    Multiyear trends in Normalized Difference Vegetation Index (NDVI) have been used as metrics of high latitude ecosystem change based on the assumption that NDVI change is associated with ecological change, generally as ...
  • Subgrid-scale Horizontal and Vertical Variations of Cloud Water in Stratocumulus Clouds: A case study based on LES and comparisons with in-situ observations 

    Covert, Justin A.; Mechem, David B.; Zhang, Zhibo (Copernicus Publications, 2021-08-06)
    Stratocumulus clouds in the marine boundary layer cover a large fraction of ocean surface and play an important role in the radiative energy balance of the Earth system. Simulating these clouds in Earth system models (ESMs) ...
  • Retrieval of Snow Water Equivalent by the Precipitation Imaging Package (PIP) in the Northern Great Lakes 

    Tokay, Ali; Lerber, Annakaisa von; Pettersen, Claire; Kulie, Mark S.; Moisseev, Dmitri N.; Wolff, David B. (American Meteorological Society, 2021-07-20)
    Performance of the Precipitation Imaging Package (PIP) for estimating the snow water equivalent (SWE) is evaluated through a comparative study with the collocated National Oceanic and Atmospheric Administration National ...
  • Spectral Fidelity of Earth's Terrestrial and Aquatic Ecosystems 

    Thompson, David R.; Brodrick, Philip G.; Cawse-Nicholson, Kerry; Chadwick, K. Dana; Green, Robert O.; Poulter, Benjamin; Serbin, Shawn; Shiklomanov, Alexey; Townsend, Philip; Turpie, Kevin (American Geophysical Union, 2021-07-10)
    Abstract The Surface Biology and Geology (SBG) investigation will create global maps of spectral surface reflectance and emissivity at a cadence of 16 days or better, with coverage to address global questions about Earth's ...
  • Variational Bayes Estimation of Hidden Markov Models for Daily Precipitation with Semi-Continuous Emissions 

    Majumder, Reetam; Gobbert, Matthias K.; Mehta, Amita; Neerchal, Nagaraj K. (UMBC HPCF, 2021)
    Stochastic precipitation generators can simulate dry and wet rainfall stretches for long durations. Generated precipitation time series data are used in climate projections, impact assessment of extreme weather events, ...
  • Aerosol properties in cloudy environments from remote sensing observations: a review of the current state of knowledge 

    Marshak, A.; Ackerman, A.; Silva, A. Da; Eck, T.; Holben, B.; Kahn, R.; Kleidman, R.; Knobelspiesse, K.; Levy, R.; Lyapustin, A.; Oreopoulos, L.; Remer, L.; Torres, O.; Varnai, T.; Wen, G.; Yorks, J. (American Meteorological Society, 2021-07-01)
    Aerosol properties are fundamentally different near clouds than distant from clouds. This paper reviews the current state of knowledge of aerosol properties in the near low cloud environment and quantitatively compares ...

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