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Assessment of climate variability of the Greenland Ice Sheet: Integration of in situ and satellite dataThe proposed research involves the application of multispectral satellite data in combination with ground truth measurements to monitor surface properties of the Greenland Ice Sheet which are essential for describing the energy and mass of the ice sheet. Several key components of the energy balance are parameterized using satellite data and in situ measurements. The analysis will be done for a ten year time period in order to get statistics on the seasonal and interannual variations of the surface processes and the climatology. Our goal is to investigate to what accuracy and over what geographic areas large scale snow properties and radiative fluxes can be derived based upon a combination of available remote sensing and meteorological data sets. Operational satellite sensors are calibrated based on ground measurements and atmospheric modeling prior to large scale analysis to ensure the quality of the satellite data. Further, several satellite sensors of different spatial and spectral resolution are intercompared to access the parameter accuracy. Proposed parameterization schemes to derive key component of the energy balance from satellite data are validated. For the understanding of the surface processes a field program was designed to collect information on spectral albedo, specular reflectance, soot content, grain size and the physical properties of different snow types. Further, the radiative and turbulent fluxes at the ice/snow surface are monitored for the parameterization and interpretation of the satellite data. The expected results include several baseline data sets of albedo, surface temperature, radiative fluxes, and different snow types of the entire Greenland Ice Sheet. These climatological data sets will be of potential use for climate sensitivity studies in the context of future climate change.
Document ID
19950013363
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Steffen, K. (Colorado Univ. Boulder, CO, United States)
Abdalati, W. (Colorado Univ. Boulder, CO, United States)
Stroeve, J. (Colorado Univ. Boulder, CO, United States)
Key, J. (Colorado Univ. Boulder, CO, United States)
Date Acquired
September 6, 2013
Publication Date
January 1, 1994
Subject Category
Environment Pollution
Report/Patent Number
NAS 1.26:197604
NASA-CR-197604
Accession Number
95N19779
Funding Number(s)
CONTRACT_GRANT: NAGW-2158
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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