中国南方地表感热通量的时空变化  

SPATIO-TEMPORAL VARIATION OF SENSIBLE HEAT FLUX OVER SOUTHERN CHINA

作　　者：李玉梅[1,2] 彭玉麟[1] 简茂球[1] 曾沁[3] 

机构地区：[1]中山大学环境科学与工程学院大气科学系/季风与环境研究中心,广东广州510275 [2]海南省气象台,海南海口570203 [3]广东省气象台,广东广州510080

出　　处：《热带气象学报》2014年第6期1027-1036,共10页Journal of Tropical Meteorology

基　　金：国家重大科学研究计划项目(2014CB953901);国家重点基础研究发展计划项目(2009CB421404);国家自然科学基金项目(40975030)共同资助

摘　　要：利用测站常规观测资料及经验公式计算得到我国南方地区地表感热通量资料,并分析了地表感热通量的时空变化特征。一年四季中,南方西部地区的感热通量基本都是呈线性增加趋势,而中、东部地区的感热通量则是线性减小的;南方地区感热通量的时间变化以年际变化为主。地气温差是决定地表感热通量逐年变化的最主要因子,近地面风速次之。地表感热通量年际分量的经验正交函数分解结果表明,四季感热通量异常的第一种主要变异模态皆为全区同号的分布型,而第二主要变异模则是呈东西反号的分布型。The spatio-temporal variation of surface sensible heat flux （SHF） over the southern China （SC） is studied based on the data evaluated from conventional observational meteorological data. There exist prominent increasing trends in all seasonal surface sensible heat fluxes over the western SC and decreasing trends over the central-eastern SC. The variations of surface sensible heat flux in all seasons are dominant on interannual time-scales. The land-air temperature difference and the near-surface wind speed are two key factors for the interannual variations of SHF, but the former is more important. The first two major anomalous patterns of SHF are presented as the region-wide in-phase anomalies and the east-west dipole anomalies respectively, based on the EOF analysis results.

关 键 词：气候学 感热通量 估算 线性变化趋势 年际变化 

分 类 号：P463.1[天文地球—大气科学及气象学]