学术活动

【9.26】Reanalysis Estimates of the Diabatic Heat Budget in the Tropical UTLS

【报告人】Dr. Jonathon Wright

【报告人单位】Tsinghua University

【报告时间】2012年9月26日(星期三)10:00

【报告地点】科研楼303会议室

Abstract:

Diabatic heat budgets differ significantly among reanalysis datasets. These differences have substantial implications for representations of transport and mixing, both within the reanalyses themselves and in models that use reanalysis data as input. I will describe differences in the heat budgets of the tropical upper troposphere and lower stratosphere (UTLS) among five reanalyses: NASA's Modern Era Retrospective Analysis for Research and Applications (MERRA), ECMWF's ERA-Interim, NCEP's Climate Forecast System Reanalysis (CFSR), JMA's JRA-25/Climate Data Assimilation System, and the NCEP/NCAR Reanalysis 1. I will discuss the effects of these differences on representations of mixing, Lagrangian transit time, and trajectory dispersion, and evaluate the results in the context of atmospheric composition.

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