热带气象学报2017，Vol.33Issue(5)：598-607,10.DOI:10.16032/j.issn.1004-4965.2017.05.003
青藏高原、东亚季风区、西北太平洋地区云系结构及相联加热机制的对比分析
A COMPARATIVE ANALYSIS OF CLOUD STRUCTURE AND ASSOCIATED HEATING MECHANISM IN THE TIBETAN PLATEAU, THE EAST ASIAN MONSOON REGION AND THE NORTHWESTERN PACIFIC
摘要
Abstract
Based on 7-year (May 18,2006～May 18,2013) CloudSat observations,characteristics of occurrence frequencies of clouds in the Tibetan Plateau,the East Asian monsoon region and the Northwestern Pacific are compared.Moreover,apparent heat source (Q1) and apparent moisture sink (Q2) are calculated for the same period by making use of the ERA-Interim reanalysis dataset.With the heat sources (Q1) and moisture sinks (Q2) profiles over the three regions,heating mechanisms associated with cloud frequency are discussed.Results show that the frequency of cloud occurrences in the Tibetan Plateau (TP),the East Asian monsoon region (EA) and the Northwestern Pacific (WNP) is 35％,22％ and 27％,respectively.Among low,middle and high clouds,the highest frequency in the TP and the EA is low clouds,followed by middle clouds.In the NWP the frequency of high and low cloud is higher than that of middle clouds,close to 19％ and 16％,respectively.In terms of the type of cloud and annual mean,there is a large amount of Nimbostratus and Altostratus over the TP and much cirrus in the EA with significantly frequent deep convective clouds in summer.On the other hand,cirrus,deep convective clouds and Altostratus are dominating in the WNP.The vertical distribution and seasonal variation of moisture sink (Q2) are well corresponding to cloud frequency in the three regions.Over the TP,the atmospheric heating by condensing water vapor and releasing latent heat is mainly due to low clouds (Nimbostratus) and middle clouds (Altostratus) formation.In the EA,low clouds (deep convection) and middle clouds (Altostratus) are making much more contribution to the heating than the others.In the WNP,atmospheric heating largely comes from deep convective cloud which is condensing water vapor and releasing latent heat with vertical transport of eddy moist static energy.关键词
青藏高原/东亚季风区/西北太平洋/云系结构/加热机制/对比分析Key words
Tibetan Plateau/East Asian monsoon region/Northwestern Pacific/clouds structure/heating mechanism/comparative analysis分类
天文与地球科学引用本文复制引用
刘建军,陈葆德..青藏高原、东亚季风区、西北太平洋地区云系结构及相联加热机制的对比分析[J].热带气象学报,2017,33(5):598-607,10.基金项目
科技部国家重点研发计划“政府间科技合作项目”重点专项(2016 YFE 0109700)资助 （2016 YFE 0109700）
