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Antarctic Sea Ice Increase with Global Warming: Southern Ocean Processes

This study explores the impact of global warming on Antarctic sea ice, focusing on precipitation, ice drift, moisture flux, and albedo. It suggests that warmer temperatures and increased moisture can lead to more precipitation and freshwater input into the ocean, resulting in a more stable Southern Ocean and less entrainment of Warm Deep Water (WDW). Thicker snow on sea ice provides increased thermal insulation and promotes more snow-to-ice conversion, leading to higher sea ice production. The study also examines the change in sea ice volume as a function of precipitation.

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Antarctic Sea Ice Increase with Global Warming: Southern Ocean Processes

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  1. ?

  2. Southern Ocean processes: Precipitation Ice drift Moisture flux Albedo From Gordon and Comiso, 1988

  3. Antarctic sea ice increase with global warming? Warmer temperatures More moisture More precipitation More freshwater input into ocean More stable Southern Ocean Less entrainment of WDW More sea ice production

  4. Antarctic sea ice increase with global warming? Warmer temperatures More moisture More precipitation More freshwater input into ocean More stable Southern Ocean Less entrainment of WDW Thicker snow on sea ice Increased thermal insulation More snow- to-ice conversion More sea ice production Less basal freezing

  5. Change in sea ice volume as a function of precipitation (Balance between thermal insulation and snow-to-ice conversion) From Powell, Markus, Stoessel, 2005

  6. The March 2006 Arctic AMSR-E sea ice validation campaign: An update Thorsten Markus Cryospheric Sciences Branch NASA Goddard Space Flight Center

  7. AMSR-R airborne validation campaign in the Arctic March 2006 • Data sets: • PSR: AMSR-like microwave radiometer (PI: A. Gasiewski) • ATM: laser altimeter (PI: W. Krabill) • D2P: radar altimeter (PI: C. Leuschen) • Snow radar (PI: S. Gogineni) • Aerial photography (PI: W. Krabill) • In-situ data (PIs: M. Sturm; J. Maslanik)

  8. ICESat and ATM Aerial photography

  9. D2P - atm comparsion

  10. KU snow radar Snow radar PSR and snow radar snow depth [cm]

  11. Things are coming together….slowly…. PSR and ATM data are fine. The snow radar didn’t work as well as anticipated. We are using ATM-D2P differences as alternative for snow depth estimates. There are a few processing issues with the D2P but we’re working on it with Carl Leuschen.

  12. Antarctic validation

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