Physics
Scientific paper
May 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999georl..26.1481w&link_type=abstract
Geophysical Research Letters, Volume 26, Issue 10, p. 1481-1484
Physics
7
Oceanography: Physical: Ice Mechanics And Air/Sea/Ice Exchange Processes, Meteorology And Atmospheric Dynamics: Ocean/Atmosphere Interactions, Meteorology And Atmospheric Dynamics: Polar Meteorology, Oceanography: General: Arctic And Antarctic Oceanography
Scientific paper
Mean annual cycles of open water area within the Antarctic sea ice pack are presented for 1978-87 and 1987-97, compiled using mean daily data. A minimum of the open water area occurs in mid February, followed by a steady increase until a plateau is established in October, before a sudden surge in early November to a peak of 4.5×106km2. As this Antarctic Open water Surge (AOS) occurs on timescales of around one month, its temporal structure only becomes truly clear when using daily means. The AOS is shown to be the result of the relative timings of the sea ice area and extent annual cycles. It is suggested these reflect the late spring crossing of the Antarctic circumpolar trough over the sea ice edge, thus shifting the dominant winds (Ekman forcing) from westerly (northerly) to easterly (southerly).
Simmonds Ian
Watkins Andrew B.
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