Physics
Scientific paper
Oct 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001georl..28.3669b&link_type=abstract
Geophysical Research Letters, Volume 28, Issue 19, p. 3669-3672
Physics
1
Oceanography: Physical: Air/Sea Interactions
Scientific paper
We investigate the intraseasonal variability of the sea-ice concentration in the Antarctic marginal ice zone (MIZ), using daily sea-ice and atmospheric data for eight winters (1990-97). From 5-31 day band-pass filtered sea-ice concentration data for the whole sea-ice region, it is clearly shown that the lower-latitude MIZ has the maximum intraseasonal variability, taking the form of a narrow, circumpolar belt with alternately increasing and decreasing areas. This coherent pattern propagates eastward as a wave. A similar wave also appeared for the atmospheric field around the MIZ. The eastward propagating waves for sea-ice and the atmosphere have almost same properties, a wavenumber of 2-4, a period of 10-15 days, and a phase velocity of 10-18 degrees/day. The common propagating signatures suggest a close relationship between the intraseasonal variability of sea-ice and atmospheric field in the Antarctic MIZ in winter.
Baba Kenji
Wakatsuchi Masaaki
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