GSTDTAP  > 气候变化
DOI10.1175/JCLI-D-16-0152.1
Tropical-Extratropical Interactions Associated with East Asian Cold Air Outbreaks. Part I: Interannual Variability
Abdillah, Muhammad Rais; Kanno, Yuki; Iwasaki, Toshiki
2017-04-01
发表期刊JOURNAL OF CLIMATE
ISSN0894-8755
EISSN1520-0442
出版年2017
卷号30期号:8
文章类型Article
语种英语
国家Japan
英文摘要

Interannual variability of winter-mean East Asian cold air outbreaks (CAOs) and its relationship with the tropical climate system during 56 boreal winters (DJF) are investigated. The magnitude of CAO is quantified as winter-mean equatorward cold airmass (CAM) flux below 280-K potential temperature across the 458N latitude. EOF analysis shows that the interannual variation of East Asian CAOs is attributed mainly to the contributions from western and eastern CAOs. In particular, the western and eastern CAOs tend to be remotely forced by La Nina and El Nino events, respectively.


The western and eastern CAOs have distinct climate variability. The western CAO, which is enhanced under the climatic anomalies of high pressure over northern Eurasia and low pressure over the western North Pacific, causes negative CAM anomalies over northern Eurasia and positive ones over midlatitude East Asia. In the tropical region, the western CAO negatively correlates with the eastern Pacific and Indian Ocean SST, both of which enhance precipitation over the Maritime Continent. On the other hand, the eastern CAO is enhanced by the strong Aleutian low and results in positive CAM anomalies in the western North Pacific and substantial negative anomalies in western North America. The eastern CAO positively correlates with the tropical SST anomalies and accordingly precipitation anomalies over the central Pacific. ENSO influences western and eastern CAOs through upper and poleward Rossby wave trains excited by convective anomalies over the Maritime Continent and central Pacific, respectively.


领域气候变化
收录类别SCI-E
WOS记录号WOS:000399679900015
WOS关键词NORTHERN HEMISPHERIC WINTER ; GEOPOTENTIAL HEIGHT ; ISENTROPIC ANALYSIS ; ARCTIC OSCILLATION ; ATMOSPHERIC BRIDGE ; MONSOON ; CIRCULATION ; SURGES ; ENSO ; FLOW
WOS类目Meteorology & Atmospheric Sciences
WOS研究方向Meteorology & Atmospheric Sciences
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/19605
专题气候变化
作者单位Tohoku Univ, Grad Sch Sci, Dept Geophys, Sendai, Miyagi, Japan
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GB/T 7714
Abdillah, Muhammad Rais,Kanno, Yuki,Iwasaki, Toshiki. Tropical-Extratropical Interactions Associated with East Asian Cold Air Outbreaks. Part I: Interannual Variability[J]. JOURNAL OF CLIMATE,2017,30(8).
APA Abdillah, Muhammad Rais,Kanno, Yuki,&Iwasaki, Toshiki.(2017).Tropical-Extratropical Interactions Associated with East Asian Cold Air Outbreaks. Part I: Interannual Variability.JOURNAL OF CLIMATE,30(8).
MLA Abdillah, Muhammad Rais,et al."Tropical-Extratropical Interactions Associated with East Asian Cold Air Outbreaks. Part I: Interannual Variability".JOURNAL OF CLIMATE 30.8(2017).
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