移出与未移出青藏高原的高原低涡涡源区域的地面加热特征分析  

Characteristics of Surface Land Heating in the Qinghai-Tibetan Plateau Vortex Source Regions along with the Departure Plateau Vortex and Non-departure Plateau Vortex

作　　者：郁淑华[1,2] 高文良 YU Shuhua;GAO Wenliang(Institute of Plateau Meteorology,China Meterological Administatration,Chengdu 610072,Sichuan,China;The Plateau and Sichuan Basin Storm Rain and Dry Damage Key Laboratory of Sichuan Province,Chengdu 610072,Sichuan,China;Ya’an Meteorology Service,Ya’an 625000,Sichuan,China)

机构地区：[1]中国气象局成都高原气象研究所,四川成都610072 [2]高原与盆地暴雨旱涝灾害四川省重点实验室,四川成都610072 [3]雅安市气象局,四川雅安625000

出　　处：《高原气象》2019年第2期299-313,共15页Plateau Meteorology

基　　金：国家自然科学基金项目(91332715;41275052)

摘　　要：利用1998—2016年NCEP/DOE逐日的日平均地面感热通量和地面潜热通量、MICAPS历史天气图资料、青藏高原低涡切变线年鉴,对高原低涡涡源区与高原地面加热特征进行统计分析,对比研究了移出青藏高原的高原涡(移出涡)、未移出青藏高原的高原涡(未移出涡)的涡源与高原地面加热的季节变化特征,及移出涡、未移出涡涡源区的地面加热特征及高原地面加热与低涡生成的相关性。结果表明,高原涡、未移出涡、移出涡的涡源分布季节变化特征相似,由冬到春到夏,初生区域逐渐扩大,由夏到秋到冬正好相反,不同的是移出涡涡源区明显比高原涡、未移出涡小,初生中心位置的季节变化也不同;高原地面感热、地面潜热、地面热源分布的季节变化特征相似,由冬到春到夏经历了明显增强的过程,由夏到秋到冬经历了减弱的过程,不同的是热源的快速增强、减弱程度及其发生季节差异大,地面潜热由春到夏增强特别明显,这与移出涡生成个数的明显增加相一致;未移出涡、移出涡春、夏、秋季主要涡源区所处的地面热源值域不同,移出涡夏季的值比未移出涡高,移出涡生成对高原区域地面热源依赖要比未移出涡强一些;夏季移出涡、未移出涡的涡源区都处在与高原地面热源正相关区内,它们与地面潜热的显著正相关区比高原地面感热的大,尤其是移出涡,高原地面潜热在高原涡生成中有重要作用,对移出涡生成影响更大。Using daily average latent heat flux and sensible heat flux of NCEP/DOE reanalysis data,historical weather graphs of MICAPS,and Qinghai-Tibetan Plateau vortex and shear line year books from 1998 to 2016,the Qinghai-Tibetan Plateau Vortex(QTPV)source regions and characteristics of the Plateau surface land heating were analyzed by statistics methods.The seasonal variation of source regions to Departure Qinghai-Tibetan Plateau Vortex(DQTPV)and Non-Departure Qinghai-Tibetan Plateau Vortex(NDQTPV)and the Plateau surface land heating were contrastively analyzed.The Plateau surface land heating characteristics of DQTPV and NDQTPV and the relationship between the generation of QTPV with the surface land heating were also analyzed.The results show that the seasonal variation of source distribution to QTPV,NDQTPV and DQTPV are similar from winter-to-spring-to-summer,along with the source generation area gradually expands.And in summer-to-autumnto-winter phase,it just has the opposite variation mode,and the DQPTV has obviously smaller area than the QTPV and NDQTPV.And the seasonal variation of QTPV’s generation center location are different to QTPV,DQTPV and NDQTPV.Second,the seasonal variations of the surface land sensible heat,the surface land latent heat and the surface land heat sources in distribution are similar.In winter-to-spring-to-summer they are all clearly strengthening and are weakened in summer-to-autumn-to-winter.And the rapid enhancement,the attenuation of heat sources and their seasonal variation had big difference in two stages.The surface latent heat is especially strengthened in spring to summer,which is highly consistent with the obvious increase numbers of the DQTPVs.Third,the value range of surface land heating to DQTPV and NDQTPV are different in Spring,Summer and Autumn,and the value of DQTPV is higher than NDQTPV’s in Summer.The reliance of DQTPV to surface land heating is stronger than that of the NDQTPV.Fourth,the source regions of DQTPV and NDQTPV locate in positive correlation area with the

关 键 词：高原低涡 涡源区 地面加热 感热通量 潜热通量 

分 类 号：P443[天文地球—大气科学及气象学]