讲座简介
In the global climate system, the Arctic ocean plays an important role especially illuminated by the recent warming and changes. Although hampered by the sparseness of the concerned, the ocean and sea ice states have been constructed and become an invaluable resource for understanding the potential relations among the dynamics variables in the past. However, recent inter-comparison studies suggest a large spread within the ensembles of the reanalyses. Based on the HYCOM and the ensemble Kalman filter, a coupled ocean and sea-ice data assimilation system using 100 members has been operationally implemented focusing on the Arctic forecast since 2008. In this study, the quantitative assessment of this reanalysis compares to both assimilated and unassimilated observations available, and presents the strengths and weakness of this system for potential users.?
主讲人简介
2008年在中国科学院大气物理所获地球流体力学博士学位,毕业后留所工作,2011-2014年任副研究员。2014年3月至今在挪威南森环境与遥感研究中心从事研究。长期从事海洋数值模式和资料同化方法研究,曾就Argo温盐廓线在HYCOM模式中的集合最优化同化,海冰厚度观测在海洋-海冰耦合模式中的集合同化等问题提出改进方案,发表SCI论文十余篇,并先后被多个业务化海洋系统所采用。目前,在欧洲海洋预报服务项目(Copernicus)中,做为多年分析产品专家之一负责北极海洋海冰再分析。Part II:报告题目:南北极典型场景SAR海冰地球物理参数解译主讲人:朱婷婷博士武汉大学测绘遥感信息工程国家重点实验室时间:2018年7月1日(周日)10:30─11:30地点:蒙民伟科技大楼南楼S818讲座简介:合成孔径雷达技术通过相干方式获取各类海冰类型的散射信息,是海冰遥感监测的重要数据源,由于极地海冰动态变化和形变大大增加了遥感的难度,如何提高SAR海冰场景的解译能力是当前海冰遥感的热点问题。针对海冰动态环境引起的各种形变,本次报告从海冰密集度—海冰分类—海冰形变特征介绍系统化的多尺度海冰参数描述和反演框架。