Variability and Trends in Antarctic Sea Ice

南极海冰的变化和趋势

• 批准号: 0838769
• 负责人: Jinlun Zhang
• 金额: $ 34.33万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-06-01 至 2013-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0838769&HistoricalAwards=false
• 关键词: Variability; Trends; Antarctic; Sea; Ice

AbstractThrough modeling and data assimilation studies, University of Washington researchers seek to reconcile information on Antarctic sea ice and its interaction with the upper ocean and the atmosphere, throughout the modern era of satellite observation (1979 to present). Links to changes and variability in Antarctic climate postulated in terms of the patterns observed in the Southern Annular Mode, mechanisms of likely positive trends in Antarctic sea ice extent in an otherwise warming climate, and estimates of how the Antarctic ice-ocean system may respond to changing atmospheric circulation will be considered. The model to be used in the study is the Global Ice-Ocean Modeling and Assimilation System (GIOMAS; http://psc.apl.washington.edu/zhang/Global_seaice), a coupled global ocean/ice/atmosphere model. Technical improvements to this model include an update of the GIOMAS model physics appropriate to the Antarctic ice-ocean system; use of NCEP/NCAR and ERA-40 reanalysis data to drive atmospheric forcing, and, through numerical experiments, estimates of parameters such Antarctic sea ice thickness, open water, snow depth, surface temperatures etc of interest to the climate and ecosystem research communities will be made."This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5)."

摘要通过建模和数据同化研究，华盛顿大学的研究人员试图调和南极海冰及其与上层海洋和大气的相互作用，在整个现代卫星观测时代（1979年至今）的信息。 将审议根据南部环形模式观察到的模式假设的南极气候变化和可变性的联系、在气候变暖的情况下南极海冰范围可能出现积极趋势的机制以及对南极冰-海洋系统如何对不断变化的大气环流作出反应的估计。研究中使用的模型是全球冰-海模拟和同化系统（GIOMAS; http：//psc.apl.washington.edu/zhang/Global_seaice），这是一个全球海洋/冰/大气耦合模型。该模式的技术改进包括更新GIOMAS模式物理学，使之适合南极冰-海洋系统;使用NCEP/NCAR和ERA-40再分析数据来驱动大气强迫，并通过数值试验，估计气候和生态系统研究界感兴趣的参数，如南极海冰厚度，开放水域，雪深，表面温度等。“该奖项是根据2009年美国复苏和再投资法案（公法111-5）资助的。"