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Recent Near-surface Temperature Trends in the Antarctic Peninsula from Observed,Reanalysis and Regional Climate Model Data

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Advances in Atmospheric Sciences 2020年第5期37卷 477-493页

作者： Deniz BOZKURT david hbromwich Jorge CARRASCO Keith MHINES Juan Carlos MAUREIRA and Roberto RONDANELLI Department of Meteorology University of ValparaísoValparaíso 2340000Chile Center for Climate and Resilience Research(CR)2 Santiago 8320000Chile Polar Meteorology Group Byrd Polar and Climate Research CenterThe Ohio State UniversityColumbusOH 43210USA Centro de Investigacion GAIA Antártica Universidad de MagallanesPunta Arenas 6200000Chile Center for Mathematical Modeling(CMM) University of ChileSantiago 8320000Chile Department of Geophysics University of ChileSantiago 8320000Chile

This study investigates the recent near-surface temperature trends over the Antarctic *** make use of available surface observations,ECMWF’s ERA5 and its predecessor ERA-Interim,as well as numerical simulations,allowing us to contrast different data *** use hindcast simulations performed with Polar-WRF over the Antarctic Peninsula on a nested domain configuration at 45 km(PWRF-45)and 15 km(PWRF-15)spatial resolutions for the period 1991?*** addition,we include hindcast simulations of KNMI-RACMO21P obtained from the CORDEX-Antarctica domain(~50 km)for further *** show that there is a marked windward warming trend except during *** windward warming trend is particularly notable in the autumn season and likely to be associated with the recent deepening of the Amundsen/Bellingshausen Sea low and warm advection towards the Antarctic *** the other hand,an overall summer cooling is characterized by the strengthening of the Weddell Sea low as well as an anticyclonic trend over the Amundsen Sea accompanied by northward *** persistent cooling trend observed at the Larsen Ice Shelf station is not captured by ERA-Interim,whereas hindcast simulations indicate that there is a clear pattern of windward warming and leeward ***,larger temporal correlations and lower differences exhibited by PWRF-15 illustrate the existence of the added value in the higher spatial resolution simulation.

关键词： dynamical downscaling cloud computing added value reanalysis Amundsen/Bellingshausen Sea Weddell Sea temperature trend

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