An upgraded scheme of surface physics for Antarctic ice sheet and its implementation in the WRF model

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• 作者：Yao Yao ; Jianbin Huang ; Yong Luo ; Zongci Zhao
• 关键词：Regional climate model ; Antarctica ; Surface temperature ; Ice sheet
• 刊名：Chinese Science Bulletin
• 出版年：2016
• 出版时间：April 2016
• 年：2016
• 卷：61
• 期：7
• 页码：576-584
• 全文大小：1,700 KB
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• 作者单位：Yao Yao (1)
  Jianbin Huang (1)
  Yong Luo (1)
  Zongci Zhao (1)
  
  1. Ministry of Education Key Laboratory for Earth System Modeling, Center for Earth System Science, and Joint Center for Global Change Studies, Tsinghua University, Beijing, 100084, China
  
• 刊物主题：Science, general; Life Sciences, general; Physics, general; Chemistry/Food Science, general; Earth Sciences, general; Engineering, general;
• 出版者：Springer Berlin Heidelberg
• ISSN：1861-9541

文摘

Regional climate models often lack detailed description of ice sheet surface and, as a result, are limited in their capability to provide useful information for Antarctic climate research and field campaigns. In this study, an upgraded scheme of surface physics for Antarctic ice sheet (IST) is developed to improve the surface temperature simulations in Antarctica. Through stand-alone simulations, IST shows advantages over the Noah glacial module, a commonly utilized scheme in the widely used Weather Research and Forecasting (WRF) model. These improvements are mainly attributed to the incorporation of detailed snow physics and optimized surface layer parameterization, which results in better simulations of both the surface albedo in summer and the turbulent sensible heat flux in winter. When coupled with IST instead of Noah, WRF models show improved simulation of surface temperatures throughout the year. The bias and root-mean-square-error of annual mean surface temperatures are reduced from 5.7 and 6.0 to 0.2 and 2.7 K.