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Interdecadal Variations of the Western Pacific Subtropical High and Surface Heat Flux over East Asia and Their Relationship

ISSN号：2095-6037
期刊名称：《气象学报：英文版》
时间：0
分类：P467[天文地球—大气科学及气象学] P404[天文地球—大气科学及气象学]
作者机构：[1]State Key Laboratory of Lake Science and Environment,Nanjing Institute of Geography and Limnology,Chinese Academy of Sciences,Nanjing 210008, [2]School of Atmospheric Sciences,Nanjing University,Nanjing 210093
相关基金：Supported by the National Key Basic Research Program of China under Grant Nos. 2004CB418300 2010CB950102 and 2010CB833404; National Natural Science Foundation of China under Grant Nos. 40675042 40871007 and 40890054; Key Innovation Project of the Chinese Academy of Sciences under Grant No. KZCX2-YW-337

作者：严蜜[1,2], 钱永甫[2], 刘健[1]

关键词：西太平洋副热带高压, 年代际变化, 感热通量, 表面, 东亚, 500百帕环流, 西太平洋副高, 突然气候变化, WPSH intensity, latent heat flux, sensible heat flux, East Asia, interdecadal variation

中文摘要：

西方的和平的副热带的高度(WPSH ) 的紧张的 interdecadal 变化在时期期间， 19512001 被从国家气候中心(NCC ) 使用数据学习，中国气象学的管理。在在东亚上的 500 hPa 和表面热流动的发行量的特征也基于 NCEP/NCAR 每月的分析数据被分析。结果表明 WPSH 和发行量在 1978 附近展出 interdecadal 变化，与提高紧张。WPSH 紧张的 interseasonal 坚持相应地改变到某程度，它比在 19511978 期间在 19782001 期间是更重要的。在东亚上的表面热流动也显示一个显著 interdecadal 变化，它带 WPSH 紧张的。理智的热流动(SSHF ) 主要是的表面的关键变化区域在 1960 年代末附近在东方、西方的西藏的高原上定位了。然而，在东方、西方的高原之间的 SSHF 的差别在 1970 年代中展出一个变化，近到 WPSH 紧张的突然的气候变化的时间。高原的 SSHF 稳定地在西方增加并且在中间迟了的 1960 年代前在东方减少，当它稳定地在东方增加并且在 mid-1970s 以后在西方减少时。在另一方面，表面的关键变化区域潜伏的热流动( SLHF )在西方太平洋( WP )上主要是位于的，在在春天的 SLHF 异例变化从的地方对积极在在 1978 前的南方否定，但是从对否定在在 1978 以后的北方积极；当在夏天它转弯从时对积极在整个在 1978 以后的 WP 否定。在春天和夏天的 SLHF 的 interdecadal 变化在一样的季节对应于很好 WPSH 紧张的 interdecadal 变化。在 WPSH 紧张和 SSHF 之间的著名关联(或 SLHF ) 尽管每这些 qnantities 在 interdecadal 规模上变化，没有任何变化，维持。

英文摘要：

The interdecadal variation of intensity of the western Pacific subtropical high（WPSH） during the period 1951-2001 is studied by using data from the National Climate Center（NCC）,China Meteorological Administration.The characteristics of the circulations at 500 hPa and the surface heat flux over East Asia are also analyzed based on the NCEP/NCAR monthly reanalysis data.The results reveal that the WPSH and the circulations exhibit interdecadal variations around 1978,with enhancing intensities.The interseasonal persistence of the WPSH intensity alters correspondingly to some extent,which is more significant during 1978-2001 than during 1951-1978.The surface heat flux over East Asia also displays a remarkable interdecadal variation,which leads that of the WPSH intensity.The key variation areas of the surface sensible heat flux（SSHF） are mainly located over the eastern and western Tibetan Plateau around the late 1960s.However,the difference of the SSHF between the eastern and western Plateau exhibits a change in the mid 1970s,close to the time of the abrupt climate change of the WPSH intensity.The SSHF of the Plateau stably increases in the west and decreases in the east before the mid-late 1960s,while it stably increases in the east and decreases in the west after the mid-1970s.On the other hand,the key variation area of the surface latent heat flux（SLHF） is mainly situated over the West Pacific（WP）,where the SLHF anomaly in spring changes from positive to negative in the south before 1978,but from negative to positive in the north after 1978;while in summer it turns from positive to negative all over the WP after 1978.The interdecadal variation of SLHF in both spring and summer corresponds well to the interdecadal variation of the WPSH intensity in the same season.The notable correlation between the WPSH intensity and SSHF（or SLHF） maintains without any change although each of these qnantities varies on the interdecadal scale.

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