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AMSR-E Sea Ice Products

AMSR-E Sea Ice Products. Thorsten Markus NASA Goddard Space Flight Center Greenbelt, MD Thorsten.Markus@nasa.gov. Footprint size 58 km 37 km 21 km 11 km 5 km. Level 2A TBs. Arctic and Antarctic: NASA Team2 NASA Team 2 - AMSR Bootstrap. Arctic and Antarctic: NASA Team2

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AMSR-E Sea Ice Products

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  1. AMSR-E Sea Ice Products Thorsten Markus NASA Goddard Space Flight Center Greenbelt, MD Thorsten.Markus@nasa.gov

  2. Footprint size 58 km 37 km 21 km 11 km 5 km Level 2A TBs

  3. Arctic and Antarctic: NASA Team2 NASA Team 2 - AMSR Bootstrap Arctic and Antarctic: NASA Team2 NASA Team 2 - Bootstrap

  4. Footprint size 58 km 37 km 21 km 11 km 5 km AMSR Bootstrap/ Ice temperature

  5. Footprint size 58 km 37 km 21 km 11 km 5 km AMSR Bootstrap/ Ice temperature Bootstrap

  6. Footprint size 58 km 37 km 21 km 11 km 5 km AMSR Bootstrap/ Ice temperature Bootstrap NASA Team 2/ Snow depth

  7. Ice concentration algorithms Algorithms: Channels used: NASA Team 2: 19V, 19H, 22V, 37V, 89V, 89H Bootstrap: 19V, 37V, 37H AMSR Bootstrap: 6V, 19V, 37V NASA Team 2: Overcomes some of the problems of the “original” NASA Team algorithm through the additional use of the 89 GHz channels. Usage of these requires correction for atmospheric effects, which is done utilizing radiative transfer modeling. Bootstrap (for 12.5 km product): “Standard” Bootstrap with the difference that 37H was previously only used for the Arctic but is now used for both hemispheres. AMSR Bootstrap (for 25 km product): Accounts for temperature effects in the ice concentration retrievals using 6 GHz data.

  8. Jan. 6, 2006 Sep. 20, 2005

  9. Snow depth on sea ice • Approach: Similar to snow on land; difference in snow scattering between • 19 and 37 GHz • Input data: TB(19V), TB(37V), NT2 ice concentration • Notes: • 12.5 km grid product • 5-day averages; temporal • information is used to flag • wet snow • no snow depth retrievals • over multi-year ice • maximum retrievable • snow depth about 50 cm • (penetration depth @37GHz) Jan. 6, 2006 Sep. 20, 2005

  10. Ice temperature • Approach: Part of the AMSR Bootstrap (ABA) ice concentration algorithm; • TB=e Ti • Input data: TB(6.9V), ABA ice concentration • Notes: • Temperature of (or close to) • snow-ice interface • 25 km grid product TB = e Ti TB(6V); NT2 sea ice concentration Jan. 6, 2006 Sep. 20, 2005

  11. Comments from the community: • HDF-files are large (about 50 MB @ 12.5 km) for each day. • HDF is not easy to handle (suggestions for additional data formats included geoTIFF etc.). • No separate sea ice concentration product. • Requests for monthly ice concentration maps. • Passive microwave ice drift/ice motion is widely used; should it become a standard product?

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