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Climate Variability & Change

We intend to propose the utilization of airborne laser altimeter data to investigate in detail the measurement requirements for ICESat-2. A significant amount of high resolution laser altimeter data from the Airborne Topographic Mapper (ATM) has been collected over the ice sheets and the sea ice. These data will be used to simulate ICESat-2 measurements scenarios. On the basis of our Cal/Val experience for ICESat, and the presumably higher accuracy requirements for ICESat-II, we will assess what approaches are likely to be most appropriate for ICESat-II and determine what preparations should be performed prior to launch. We will analyze existing (at the time of task initiation) studies on optimal footprint spacing and size and perform additional studies using ATM data. For the sea ice and fast moving glaciers (such as Jakobshavn), we will assess ICESat-II monitoring problems due to cloud cover and rough terrain using ICESat-I and ATM data. For the sea ice we will furthermore address the issue of open water (lead) detection, which is needed to determine an ocean surface reference elevation.

Project PI: Thorsten Markus/NASA Goddard Space Flight Center

Cryospheric Sciences Branch, Code 614.1, NASA Goddard Space Flight Center, Greenbelt, MD 20771

Phone: (301) 614-5882

Email: thorsten.markus@nasa.gov

http://earthsky.org/earth/thorsten-markus-sees-earths-sea-ice-thinning

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Started: Aug 10, 2010

Last Activity: Dec 15, 2010

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