Observations of wind shear over the Southern Ocean

摘要: [1] The thermodynamic structure of the lower troposphere over Southern Ocean is analyzed by employing 16 years high resolution upper air soundings from Macquarie Island (54.62°S, 158.85°E). The are to develop an understanding boundary layer and wind shear occurring through levels this region, compare European Centre for Medium-Range Weather Forecasts (ECMWF) model level reanalysis data Year Tropical Convection (YOTC). A multiple layered commonly observed in soundings, also YOTC, but with a frequency. climatological mean variability number variables calculated both sets, which reveals that YOTC performs well, has weaknesses modeling moisture fields, particularly evident profiles. distinction between types made, frequency they occur quantified sets. This highlights important differences observations product. Proxy cloud fields constructed two these suggest clouds region top secondary temperature inversion, i.e., “buffer layer” words Russell et al. (1998). peak relative observing lies roughly around 912.5 hPa An examination across boundaries finds base occurs more frequently than top, suggesting not embedded well-mixed layer.