Sciences and Exploration Directorate

Bryan M Karpowicz

(Senior Research Scientist)

Bryan M Karpowicz's Contact Card & Information.
Phone: 301.614.5292
Org Code: 610.1
Mail Code 610.1
Greenbelt, MD 20771


Senior Research Scientist

Goddard Earth Sciences Technology and Research (GESTAR/GESTAR II) - NASA Goddard Space Flight Center, Greenbelt, MD

September 2018 - Present

  • Investigating the potential for improving Ozone Assimilation into GEOS Atmospheric Data Assimilation System using hyperspectral radiances such as CrIS, IASI, and AIRS spectrometers
  • Investigating improvements necessary to utilize Shortwave Infrared (SWIR) radiative transfer for sounding missions in the 4 μm region
  • General improvements to assimilation of remotely sensed observations


US Naval Research Laboratory Marine Meteorology Division (Civil Servant 7/2017-8/2018, Contractor Devine, Inc 5/2015-7/2017). - Monterey, CA

May 2015 - August 2018

  • Conducted advanced atmospheric radiance assimilation research; including developing, testing, and evaluating methods to incorporate radiance assimilation capabilities; for improving passive microwave and IR data assimilation for the NAVGEM global NWP model
  • Conducted atmospheric remote sensing research with current, and new satellite sensors; such as GMI, SAPHIR, and AMSR2, AMSU-A, MHS, IASI, CrIS, and SSMIS; for incorporation into the NAVDAS-AR data assimilation system.
  • Developed, and tested end-to-end components for GMI, SAPHIR, AMSR2, and Windsat assimilation into NAVGEM
  • Focused on details regarding sensor implementation using radiative transfer incorporating the latest Community Radiative Transfer Model (CRTM) into the NAVGEM data assimilation scheme
  • Used advanced data assimilation methods such as correlated observation error studies related to NWP data assimilation
  • Responsible for the development of atmospheric vector winds assimilation methods for incorporating data from MISR, and Global AVHRR into the NAVGEM NWP model

Consultant (Part-time)

Self, contracted by Southwest Research Institute - Various Locations

June 2011 - May 2015

  • Developed new equation of state for the hydrogen-water vapor system for Jupiter’s atmosphere
  • Improving the interpretation of laboratory microwave opacity measurements
  • Developing an improved radiative transfer, and thermo-chemical model for interpretation of microwave emission measurements from the Juno microwave radiometer

Staff Scientist

National Ecological Observatory Network, Inc. Airborne Observation Platform - Boulder, CO

November 2011 - September 2014

  • Working with Visible/Near Infrared imaging spectrometer measurements to derive data products
  • Developing data products from aircraft remote sensing measurements which are traceable to heritage satellite sensors such as MISR, MODIS, and Landsat.
  • Evaluation of existing commercial atmospheric correction algorithms to support a visible / near-infrared imaging spectrometer
  •  Developed software and analysis to support laboratory development, and calibration activities
  • Supported integration, and flight activities including an imaging spectrometer, and LiDAR.

Senior Research Associate

Atmospheric and Environmental Research (AER), Inc, Trace Gas Remote Sensing Group - Lexington, MA

December 2009 - April 2011

  • Devopled analysis tools for prototype ASCENDS CO2 total column LIDAR
  • Developed analysis tools to compare GOSAT radiances to simulations
  • Sensitivity studies utilizing radiative transfer in the Jovian atmosphere


Georgia Institute of Technology, Atlanta, GA

Ph.D. in Earth and Atmospheric Sciences, December 2009 (defended, awarded May 2010).

Master of Science, School of Earth and Atmospheric Sciences, May 2007

Master of Science, Electrical and Computer Engineering, May 2003

Rensselaer Polytechnic Institute, Troy, NY

Bachelor of Science in Electrical Engineering, May 2001



2024. "Using the GEOS 5 Nature Run to Simulate 2053 nm Coherent Doppler Wind Lidar Observations." Journal of Atmospheric and Oceanic Technology [10.1175/jtech-d-23-0117.1] [Journal Article/Letter]

2024. "Using OSSEs to Evaluate GXS Impact in the Context of International Coordination." Journal of Atmospheric and Oceanic Technology 41 (3): 261-278 [10.1175/jtech-d-23-0141.1] [Journal Article/Letter]

2023. "Robustness of Observing System Simulation Experiments." Tellus A: Dynamic Meteorology and Oceanography 75 (1): 309-333 [10.16993/tellusa.3254] [Journal Article/Letter]

2023. "Tropospheric ozone data assimilation in the NASA GEOS composition forecast modeling system (GEOS-CF v2.0) using satellite data for ozone vertical profiles (MLS), total ozone columns (OMI), and thermal infrared radiances (AIRS, IASI)." Environmental Research Letters [10.1088/1748-9326/acf0b7] [Journal Article/Letter]

2022. "Assessment of Geo-Kompsat-2A Atmospheric Motion Vector Data and Its Assimilation Impact in the GEOS Atmospheric Data Assimilation System." Remote Sensing 14 (21): 5287 [10.3390/rs14215287] [Journal Article/Letter]

2022. "pyCRTM: A python interface for the community radiative transfer model." Journal of Quantitative Spectroscopy and Radiative Transfer 288 108263 [10.1016/j.jqsrt.2022.108263] [Journal Article/Letter]

2022. "Using OSSEs to Evaluate the Impacts of Geostationary Infrared Sounders." Journal of Atmospheric and Oceanic Technology 39 (12): 1903-1918 [] [Journal Article/Letter]

2022. "Assessment of retrieved GMI emissivity over land, snow, and sea ice in the GEOS system." Journal of Atmospheric and Oceanic Technology [10.1175/jtech-d-21-0187.1] [Journal Article/Letter]

2022. "Novel Parameterization of Ice Cloud Effective Diameter from Collocated CALIOP-IIR and CloudSat Retrievals." Journal of Applied Meteorology and Climatology 61 (7): 891-907 [10.1175/jamc-d-21-0163.1] [Journal Article/Letter]

2022. "A deep learning approach to fast radiative transfer." Journal of Quantitative Spectroscopy and Radiative Transfer 280 108088 [10.1016/j.jqsrt.2022.108088] [Journal Article/Letter]

2021. "Investigating the utility of hyperspectral sounders in the 9.6 μm band to improve ozone analyses." Quarterly Journal of the Royal Meteorological Society [10.1002/qj.4198] [Journal Article/Letter]

2016. "High-Precision Laboratory Measurements Supporting Retrieval of Water Vapor, Gaseous Ammonia, and Aqueous Ammonia Clouds with the Juno Microwave Radiometer (MWR)." Space Science Reviews 213 (1-4): 187-204 [10.1007/s11214-016-0265-0] [Journal Article/Letter]

2013. "Investigating the H2–He–H2O–CH4 equation of state in the deep troposphere of Jupiter." Icarus 223 (1): 277-297 [10.1016/j.icarus.2012.11.026] [Journal Article/Letter]

2011. "Reconciling the centimeter- and millimeter-wavelength ammonia absorption spectra under jovian conditions: Extensive millimeter-wavelength measurements and a consistent model." Icarus 212 (1): 224-235 [10.1016/j.icarus.2010.12.010] [Journal Article/Letter]

2011. "In search of water vapor on Jupiter: Laboratory measurements of the microwave properties of water vapor under simulated jovian conditions." Icarus 212 (1): 210-223 [10.1016/j.icarus.2010.11.035] [Journal Article/Letter]

2009. "A new model of the hydrogen and helium-broadened microwave opacity of ammonia based on extensive laboratory measurements." Icarus 202 (1): 316-335 [10.1016/j.icarus.2009.02.002] [Journal Article/Letter]

Talks, Presentations and Posters


24th International TOVS Study Conference

April 21, 2023

Karpowicz, B.M., "Improving CrIS Infrared Assimilation in the GEOS Atmospheric Data Assimilation System"

AGU Annual Fall Meeting

14, 2021

Karpowicz, B.M., Y. Zhu, and S.J. Munchak "Assessment of retrieved GMI emissivity over land, snow and sea ice in the GEOS system"

23rd International TOVS Study Conference

July 30, 2021

Karpowicz, B.M. and WIll McCarty "Assimilation of CrIS Shortwave Infrared Channels into the GEOS Atmospheric Data Assimilation System"

American Geophysical Union, Annual Fall Meeting

10, 2019

Karpowicz, B.M., W. McCarty, K. Wargan "Improved ozone analyses using direct assimilation of 9.6μm radiances from hyperspectral sounders"

22nd International TOVS Study Conference

December 4, 2019

Karpowicz, B.M., W. McCarty, K. Wargan "Improvements to Ozone Analyses using Hyperspectral Sounders in the 9.6 um Band"

NASA Sounder Science Team Meeting

October 27, 2019

Karpowicz, B.M., W. McCarty, K. Wargan "Improvements to Ozone Analyses using Hyperspectral Sounders in the 9.6 μm Band"

17th JCSDA Technical Review Meeting and Science Workshop

June 30, 2019

Karpowicz, B.M., W. McCarty, K. Wargan “Investigating the Utility of Hyperspectral Sounders in the 9.6 µm Band to Improve Analyses”

IODA Workshop, Joint Center for Data Assimilation, Monterey, CA

March 11, 2019

Will McCarty and Bryan Karpowicz, Atmospheric Observation Considerations for IODA at the GMAO

2019 Annual AMS Meeting

February 9, 2019

Erica K Dolinar, B. M. Karpowicz, J. R. Campbell, K. C. Viner, and X. Dong, "A New Cloud Ice Microphysical Parameterization Developed from CALIOP/CloudSat for Numerical Weather Prediction"

21st International TOVS Study Conference

December 2017

Karpowicz, B.M., B.C. Ruston, S.D. Swadley, Microwave Radiance Assimilation at NRL: Advanced Techniques, Developments, and Future Sensors

The 14 th JCSDA Workshop on Satellite Data Assimilation

June 2016

Stone, R., N. Baker, P. Pauley, B. Karpowicz, “Comparison and Impact of Newly Available Atmospheric Motion Vectors in NAVGEM”

The 20 th International TOVS Study Conference (ITSC-20) Lake Geneva, Wisconsin


Ruston, B., N. Baker, S. Swadley, T. Maurer, W. Campbell, R. Langland, K. Hoppel, J.McCormack, Stephen Eckermann, B. Karpowicz, Improvements in the Use of Humidity from Hyperspectral IR

2014 IEEE International Geoscience and Remote Sensing Symposium.

July 2014

Karpowicz, B.M., N. Leisso, T. Kampe, “A Synergistic Approach to Atmospheric Correction of NEON’s Airborne Hyperspectral Data Utilizing Airborne Solar Spectral Flux Radiometers, Ground Based Radiometers, and Airborne Hyperspectral Imagers"