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

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

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

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

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

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

9. 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.

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

11. 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, 2006Sep. 20, 2005

12. 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, 2006Sep. 20, 2005

13. 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?