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Climate Variability & Change, Water & Energy Cycles

We propose to extend the record of Arctic Ocean sea ice thickness from the ICESat mission of ~6 years through the expected duration of the CryoSat-2 mission (~3 years). The record from ICESat (2003-2008) show astonishing declines in Arctic Ocean sea ice thickness and volume associated with the recent record lows in end-of-melt ice extents. With the expected end of the ICESat mission, we propose to assess the potential of filling the gap in basin-scale lidar coverage using a combination of CryoSat-2 altimetry and available aircraft acquisitions. Specifically, we propose to: 1) continue the assessment and improvement of ICESat estimates of sea ice freeboard and thickness; 2) devise procedures to retrieve freeboard and thickness from CryoSat-2 elevation profiles; 3) assess the quality of these quantities derived from CryoSat-2; 4) examine the possibility of cross-calibrating the ICESat and CryoSat-2 ice thickness records for analysis of the seasonal and interannual trends in Arctic sea ice thickness and volume; and, 5) continue to explore the use of elevation profiles from satellites for estimating the ice thickness of the Southern Ocean. A capability to merge the two satellite data sets represents a significant contribution to the extension of the current record of near-basin scale ICESat maps of Arctic sea ice thickness through the CryoSat-2 period, and to the expected launch of the ICESat-II mission. This work is proposed to be conducted as Fundamental Research

Project PI: Ronald Kwok/Jet Propulsion Laboratory

Radar Science and Engineering Section Jet Propulsion Laboratory California Institute of Technology M/S 300-235 4800 Oak Grove Drive Pasadena, CA 91109

Phone: (818) 354-5614

Fax: (818) 393-3077

Email: ron.kwok@jpl.nasa.gov

http://rkwok.jpl.nasa.gov/index.html

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Started: Sep 27, 2010

Last Activity: Jan 04, 2011

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