caa a22 4500 475777808 CHVBK 20180406123636.0 cr unu---uuuuu 170329e20001201xx s 000 0 eng 10.1023/A:1002793831076 doi (NATIONALLICENCE)springer-10.1023/A:1002793831076 Low-Level Atmospheric Jets And Inversions Over The Western Weddell Sea [Elektronische Daten] [Edgar Andreas, Kerry Claffy, Aleksandr Makshtas] For four months in the fall and earlywinter of 1992, as Ice Station Weddell (ISW) driftednorthward through the ice-covered western Weddell Sea,ice station personnel profiled the atmosphericboundary layer (ABL) with radiosondes. These showedthat the ABL was virtually always stably stratifiedduring this season: 96% of the soundings found anear-surface inversion layer. Forty-four percent ofthese inversions were surface-based. Eighty percentof the soundings that yielded unambiguous windprofiles showed an atmospheric jet with speeds as highas 14 m s-1 in a core below an altitude of 425 m. This paper documents the features of these inversionsand low-level jets. Because the inversion statistics,in particular, are like those reported in and aroundthe Arctic Ocean, similar local processes seem tocontrol the ABL over sea ice regions in bothhemispheres. A simple two-layer model, in which anelevated layer becomes frictionally decoupled from thesurface, does well in explaining the ISW jetstatistics. This model also implies a new geostrophicdrag parameterization for sea-ice regions that dependson the magnitude of the geostrophic wind, the 10-mdrag coefficient CDN10, and the ABL height, butnot explicitly on any stratification parameter. Kluwer Academic Publishers, 2000 Geostrophic drag relation nationallicence Inertial oscillations nationallicence Inversions nationallicence Low-level jet nationallicence Stable boundary layer nationallicence Weddell Sea nationallicence Andreas Edgar U.S. Army Cold Regions Research and Engineering Laboratory, 72 Lyme Road, 03755-1290, Hanover, New Hampshire, U.S.A. aut Claffy Kerry U.S. Army Cold Regions Research and Engineering Laboratory, 72 Lyme Road, 03755-1290, Hanover, New Hampshire, U.S.A. aut Makshtas Aleksandr International Arctic Research Center, 930 Koyukuk Drive, 99775-7335, U.S.A., Fairbanks, Alaska aut Boundary-Layer Meteorology Kluwer Academic Publishers 97/3(2000-12-01), 459-486 0006-8314 97:3<459 2000 97 10546 https://doi.org/10.1023/A:1002793831076 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1002793831076 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Andreas Edgar U.S. Army Cold Regions Research and Engineering Laboratory, 72 Lyme Road, 03755-1290, Hanover, New Hampshire, U.S.A aut NATIONALLICENCE 700 1- Claffy Kerry U.S. Army Cold Regions Research and Engineering Laboratory, 72 Lyme Road, 03755-1290, Hanover, New Hampshire, U.S.A aut NATIONALLICENCE 700 1- Makshtas Aleksandr International Arctic Research Center, 930 Koyukuk Drive, 99775-7335, U.S.A., Fairbanks, Alaska aut NATIONALLICENCE 773 0- Boundary-Layer Meteorology Kluwer Academic Publishers 97/3(2000-12-01), 459-486 0006-8314 97:3<459 2000 97 10546 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer