中国科学院 | 大气所 | 网站地图 | 加入收藏
首 页  | | | 论文论著 | | 科学传播 | English  
  学术报告
学术报告
学术报告 您当前所在的位置: 首页 > 学术报告 > 学术报告
Aspects of Potential vorticity dynamics: inversions and attribution
来源:LASG    访问次数:    报告时间:2018-5-23
【报告人】        Prof. Joseph Egger
【报告人单位】LMU Munchen, Germany
【报告时间】    2018年5月23日(星期三)10:00
【报告地点】    科研楼303会议室
【报告简介】    Inversion seeks to determine the complete flow if just one variable q1 is available. A balance condition is needed and boundary conditions must be specified. The concept of attribution relates to the choice of PV for q1. Attribution claims that PV has an influence on the flow. This idea is often illustrated by the electrostatics where PV anomalies are seen as analogues of electric charges. These ideas are discussed and exposed to a counter example. Piecewise PV inversion (PPVI) seeks to determine this impact of observed PV anomalies on the surrounding flow. A flow domain D is divided in subdomains D1 and D2 (D - D1). The PV in D1 to the resulting flow with stream function s is not unique because there are many anomalies in D1 which induce the same s. On the other hand, the superposition principle is violated in this case. The relevance of these results for the concept of attribution is discussed.
 
© 1997-2010 大气科学和地球流体力学数值模拟国家重点实验室 版权所有 京ICP备06004370号
北京9804信箱LASG 邮编:100029 传真:82995172