Welcome to AEROCENTER
Aerosol research is one of the nine cross-cutting themes of the Earth Sciences Division at NASA's Goddard Space Flight Center. AeroCenter is an interdisciplinary union of researchers at NASA Goddard and other organizations in the Washington DC metropolitan area (including NOAA, University of Maryland, and other insititutions) who are interested in many facets of atmospheric aerosols. Interests include aerosol effects on radiative transfer, clouds and precipitation, climate, the biosphere, and atmospheric chemistry the aerosol role in air quality and human health; and the atmospheric correction of aerosol blurring of satellite imagery of the ground. Our regular activities include strong collaborations among aerosol community, informal weekly AeroCenter Forum (seminars, discussions, posters, and paper reviews) and annual aerosol research update.
Featured Aerocenter Highlight
Our annual AeroCenter update will be held on Wednesday 27 May 2015 at the NASA GSFC visitor center, accessible without badge.
10:00-10:15: Welcome - AeroCenter Committee and Charles Ichoku
10:15 -11:25: Sensor and Modeling Update I
- CATS: John York
- MISR: Ralph Kahn
- Dark Target: Rob Levy
- MPLNET: Judd Welton
- OMI: Hiren Jethva
- Deep Blue: Jaehwa Lee
- MAIAC: Alexei Lyapustin
11:30 - 12:30: Sensor and Modeling Update II
- AERONET: David Giles
- GOCART: Mian Chin
- GEOS-5 Aerosol: Arlindo Da Silva
- NU-WRF: Toshi Matsui
- New Measurement Capability - Vanderlei Martins
- GISS: Allegra LeGrande
12:30 - 1:30: Lunch Break
1:30 - 2:00: Perspective from NASA HQ and Q&A - Hal Maring
2:00 - 3:00: Science Talks
3:15 - 4:15: Panel discussion: aerosol forcing and its implication for geoengineering research
4:30 - 5:30: Panel Discussion: aerosol forcing with a focus on above cloud aerosol
Kahn, R. A., and B. J. Gaitley, 2015. An analysis of global aerosol type as retrieved by MISR. J. Geophys. Res. Atmos. 120, doi:10.1002/2015JD023322.
In addition to aerosol optical depth (AOD), aerosol type is required globally for climate forcing calculations, constraining aerosol transport models, and other applications. However, validating satellite aerosol type retrievals is more challenging than testing AOD results, because aerosol type is a more complex quantity, and ground-truth data are far less numerous and generally not as robust. We evaluate the MISR Version 22 aerosol type retrievals by assessing product self-consistency on a regional basis, and by making comparisons with general expectation and with the AERONET aerosol type climatology, as available. The results confirm and add detail to the observation that aerosol type discrimination improves dramatically where mid-visible AOD exceeds about 0.15 or 0.2. When the aerosol type information content of the observations is relatively low, increased scattering-angle range improves particle-type sensitivity. The MISR standard, operational product discriminates among small, medium, and large particles, and exhibits qualitative sensitivity to single-scattering albedo (SSA) under good aerosol-type retrieval conditions, providing a categorical aerosol type classification. MISR Ångström exponent (ANG) deviates systematically from ground-truth where particle types missing from the algorithm climatology are present, or where cloud contamination is likely to occur, and SSA tends to be overestimated where absorbing particles are found. We determined that the number of mixtures passing the algorithm acceptance criteria (#SuccMix) represents aerosol-type retrieval quality effectively, providing a useful aerosol-type quality flag.
Dr. Yoram Kaufman
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