Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1007/s00382-017-3692-z |
PDO modulation of the ENSO impact on the summer South Asian high | |
Xue, Xu1; Chen, Wen2,3; Chen, Shangfeng2; Feng, Juan2 | |
2018-02-01 | |
发表期刊 | CLIMATE DYNAMICS |
ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2018 |
卷号 | 50页码:1393-1411 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | This study investigates modulation effects of the Pacific decadal oscillation (PDO) on the impact of boreal winter El Nio-Southern Oscillation (ENSO) on the South Asian high (SAH) variability in the following summer. In the El Nio together with positive PDO (EL/+PDO) or the La Nia together with negative PDO (LA/-PDO) years, boreal winter ENSO can influence the following summer SAH activity significantly. The SAH tends to be obviously strengthened (weakened) and located further south (north) during EL/+PDO (LA/-PDO). However, in the El Nio together with negative PDO (EL/-PDO) or the La Nia together with positive PDO (LA/+PDO) years, the influence of ENSO on the SAH tends to be weak. The strength and location of SAH are close to those in the climatology of 1950-2011 during the EL/-PDO or the LA/+PDO. Further analysis indicates that the PDO could exert pronounced influence on the ENSO-SAH connection via modulating the anomalous Walker circulation and charge effect over the tropical Indian Ocean (TIO). During the EL/+PDO or LA/-PDO, the anomalous Walker circulation associated with El Nio or La Nia is stronger and lasts for a longer time than those during the EL/-PDO or LA/+PDO. This leads to stronger descending (ascending) motion over the Maritime Continent and easterly (westerly) wind anomalies over the eastern Indian Ocean in the EL/+PDO (LA/-PDO), which further exert larger effects on the surface heat fluxes and subsurface ocean dynamical heating process over the Indian Ocean. As such, the induced warm (cold) sea surface temperature anomalies over the Indian Ocean are more significant and larger in the EL/+PDO (LA/-PDO). These larger sea surface temperature anomalies over the TIO could exert a more significant influence on the tropospheric temperature via moisture adjustment, which subsequently results in stronger SAH variability in the EL/+PDO or the LA/-PDO. |
英文关键词 | South Asian high ENSO PDO SAH-ENSO relationship Tropical Indian Ocean SST |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000425328700039 |
WOS关键词 | SEA-SURFACE TEMPERATURE ; TROPICAL INDIAN-OCEAN ; PACIFIC DECADAL OSCILLATION ; LARGE-SCALE CIRCULATIONS ; EL-NINO ; CONVECTING ATMOSPHERES ; WINTER MONSOON ; CLIMATE ; CHINA ; TELECONNECTIONS |
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/35285 |
专题 | 气候变化 |
作者单位 | 1.Guizhou Univ, Dept Ecosyst, Coll Life Sci, Guiyang 550025, Guizhou, Peoples R China; 2.Chinese Acad Sci, Inst Atmospher Phys, Ctr Monsoon Syst Res, Beijing 100190, Peoples R China; 3.Univ Chinese Acad Sci, Sch Earth Sci, Beijing, Peoples R China |
推荐引用方式 GB/T 7714 | Xue, Xu,Chen, Wen,Chen, Shangfeng,et al. PDO modulation of the ENSO impact on the summer South Asian high[J]. CLIMATE DYNAMICS,2018,50:1393-1411. |
APA | Xue, Xu,Chen, Wen,Chen, Shangfeng,&Feng, Juan.(2018).PDO modulation of the ENSO impact on the summer South Asian high.CLIMATE DYNAMICS,50,1393-1411. |
MLA | Xue, Xu,et al."PDO modulation of the ENSO impact on the summer South Asian high".CLIMATE DYNAMICS 50(2018):1393-1411. |
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