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DOI | 10.1175/JCLI-D-17-0132.1 |
Breakdown of the Relationship between Australian Summer Rainfall and ENSO Caused by Tropical Indian Ocean SST Warming | |
Zhu, Zhiwei | |
2018-03-01 | |
发表期刊 | JOURNAL OF CLIMATE |
ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2018 |
卷号 | 31期号:6页码:2321-2336 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | The relationship between El Nino-Southern Oscillation (ENSO) and Australian summer rainfall (ASR) during 1960-2015 experienced an interdecadal change around the mid-1980s. Before the mid-1980s, ASR was significantly correlated with tropical central Pacific (TCP) sea surface temperature (SST), whereas after that it was not. While El Nino was always independent from ASR, La Nina had a close relationship with ASR. However, this relationship was weakened after the mid-1980s. The Indian Ocean SST warming might contribute to the weakening relationship between La Nina and ASR. For La Nina events before the mid-1980s, the negative SSTA over TCP and the southern tropical Indian Ocean induced a large-scale lower-level cyclonic anomaly over Australia, leading to nearly uniform positive precipitation over Australia. In this manner, a significant relationship between ASR and La Nina was established. On the contrary, for the La Nina events after the mid-1980s, because of the Indian Ocean SST warming, the equatorial eastern Indian Ocean and Maritime Continent presented positive SSTAs and enhanced moisture, favoring enhanced rainfall anomalies over the equatorial Maritime Continent. This enhanced rainfall condensation heating induced a lower-level cyclonic anomaly to the west of Australia. The northerly anomalies at the eastern flank of this cyclonic anomaly counteracted the southerly anomalies at the western flank of the cyclonic anomaly over eastern Australia induced by the negative TCP SSTA, leading to insignificant circulation and rainfall anomalies over Australia. As such, being interfered with by the equatorial Maritime Continent heating, the relationship between ASR and La Nina was weakened. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000427447000014 |
WOS关键词 | EL-NINO ; SOUTHERN-OSCILLATION ; MONSOON RAINFALL ; INTERDECADAL MODULATION ; VARIABILITY ; PACIFIC ; PRECIPITATION ; TELECONNECTION ; CLIMATE ; PHASE |
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/20165 |
专题 | 气候变化 |
作者单位 | Nanjing Univ Informat Sci & Technol, Collaborat Innovat Ctr Forecast & Evaluat Meteoro, Key Lab Meteorol Disaster, Joint Int Res Lab Climate & Environm Change,Minis, Nanjing, Jiangsu, Peoples R China |
推荐引用方式 GB/T 7714 | Zhu, Zhiwei. Breakdown of the Relationship between Australian Summer Rainfall and ENSO Caused by Tropical Indian Ocean SST Warming[J]. JOURNAL OF CLIMATE,2018,31(6):2321-2336. |
APA | Zhu, Zhiwei.(2018).Breakdown of the Relationship between Australian Summer Rainfall and ENSO Caused by Tropical Indian Ocean SST Warming.JOURNAL OF CLIMATE,31(6),2321-2336. |
MLA | Zhu, Zhiwei."Breakdown of the Relationship between Australian Summer Rainfall and ENSO Caused by Tropical Indian Ocean SST Warming".JOURNAL OF CLIMATE 31.6(2018):2321-2336. |
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