Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1007/s00382-019-04893-z |
Effect of the mean flow on the anomalous anticyclone over the Indo-Northwest Pacific in post-El Nino summers | |
Hu, Kaiming1,2,3; Huang, Gang1,2,3,4; Xie, Shang-Ping5; Long, Shang-Min6,7 | |
2019-11-01 | |
发表期刊 | CLIMATE DYNAMICS |
ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2019 |
卷号 | 53页码:5725-5741 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA |
英文摘要 | A large-scale anomalous anticyclone (AAC) is a recurrent pattern in post-El Nino summers, extending from the tropical Northwest Pacific (NWP) to the North Indian Ocean. In boreal summer, there is a strongly confluent lower-level flow between the monsoonal westerlies and easterly trades over the Indo-Northwest Pacific. The effect of this basic state confluent flow on the AAC is investigated with energetics analysis and numerical modeling. The results show that the lower-level mean flow over the Indo-Northwest Pacific aids the AAC development. Specifically, the conversion of kinetic energy from the mean confluent flow to perturbations helps amplify easterly anomalies over the Indo-Northwest Pacific in post-El Nino summers. The enhanced easterly wind anomalies provide a positive feedback onto the AAC by inducing surface Ekman divergence to suppress convection over the NWP. Moreover, the structure of the optimal diabatic heating for the AAC pattern is determined using a method similar to the Green's function approach. The optimal forcing features heating in the tropical Indian Ocean and cooling in the NWP. This suggests that barotropic energy conversion in the confluence zone and the El Nino-induced positive (negative) sea surface temperature anomalies over the TIO (NWP) together lead to the AAC development over the Indo-Northwest Pacific in post-El Nino summers. |
英文关键词 | ENSO East Asian Climate Anomalous anticyclone |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000493469900033 |
WOS关键词 | INDIAN-OCEAN VARIABILITY ; WESTERN PACIFIC ; INTERDECADAL VARIATIONS ; COMBINATION-MODE ; SST ANOMALIES ; ENSO ; MONSOON ; CLIMATE ; TELECONNECTION ; TEMPERATURE |
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/187921 |
专题 | 气候变化 |
作者单位 | 1.Chinese Acad Sci, IAP, State Key Lab Numer Modeling Atmospher Sci & Geop, POB 9804, Beijing 100029, Peoples R China; 2.Chinese Acad Sci, IAP, Ctr Monsoon Syst Res, POB 9804, Beijing 100029, Peoples R China; 3.JCGCS, Beijing 100875, Peoples R China; 4.Qingdao Natl Lab Marine Sci & Technol, Lab Reg Oceanog & Numer Modeling, Qingdao 266237, Shandong, Peoples R China; 5.Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA; 6.Hohai Univ, Coll Oceanog, Nanjing, Jiangsu, Peoples R China; 7.Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou, Guangdong, Peoples R China |
推荐引用方式 GB/T 7714 | Hu, Kaiming,Huang, Gang,Xie, Shang-Ping,et al. Effect of the mean flow on the anomalous anticyclone over the Indo-Northwest Pacific in post-El Nino summers[J]. CLIMATE DYNAMICS,2019,53:5725-5741. |
APA | Hu, Kaiming,Huang, Gang,Xie, Shang-Ping,&Long, Shang-Min.(2019).Effect of the mean flow on the anomalous anticyclone over the Indo-Northwest Pacific in post-El Nino summers.CLIMATE DYNAMICS,53,5725-5741. |
MLA | Hu, Kaiming,et al."Effect of the mean flow on the anomalous anticyclone over the Indo-Northwest Pacific in post-El Nino summers".CLIMATE DYNAMICS 53(2019):5725-5741. |
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