Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JCLI-D-19-0165.1 |
Weakened Impact of the Developing El Nino on Tropical Indian Ocean Climate Variability under Global Warming | |
He, Chao1,2; Wang, Yuhao2; Li, Tim2,3,4 | |
2019-11-01 | |
发表期刊 | JOURNAL OF CLIMATE
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ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2019 |
卷号 | 32期号:21页码:7265-7279 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA |
英文摘要 | El Nino induces an anomalous easterly wind along the equator and a pair of anomalous anticyclones straddling the equator over the tropical Indian Ocean (TIO) during the autumn of its developing phase. Based on 30 coupled models participating in CMIP5, these atmospheric circulation anomalies over TIO are substantially weakened by about 12%-13% K-1 under global warming scenarios, associated with a weakened zonal gradient of the sea surface temperature (SST) anomaly. The mechanism for the response is investigated based on a hierarchy of model experiments. Based on stand-alone atmospheric model experiments under uniform and patterned mean-state SST warming, the atmospheric circulation anomaly over TIO during the autumn of the developing El Nino is also substantially weakened by about 8% K-1 even if the interannual variability of SST remains exactly unchanged, suggesting that the primary cause resides in the atmosphere rather than the SST anomaly. The tropospheric static stability is robustly enhanced under global warming, and experiments performed by a linear baroclinic model show that a much weaker atmospheric circulation anomaly over TIO is stimulated by an unchanged diabatic heating anomaly under a more stable atmosphere. The weakened atmospheric circulation anomaly due to enhanced static stability weakens the zonal gradient of the SST anomaly within TIO through local air-sea interaction, and it acts to further weaken the atmospheric circulation anomaly. The enhanced static stability of the troposphere is probably the primary cause and the air-sea interaction within TIO is a secondary cause for the weakened impact of the developing El Nino on atmospheric circulation variability over TIO. |
英文关键词 | Climate change Climate variability ENSO |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000487804400004 |
WOS关键词 | INTERANNUAL VARIABILITY ; PACIFIC-OCEAN ; NORTH PACIFIC ; DIPOLE MODE ; ENSO ; MONSOON ; PRECIPITATION ; CIRCULATION ; EVENTS ; FREQUENCY |
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/188095 |
专题 | 气候变化 |
作者单位 | 1.Jinan Univ, Inst Environm & Climate Res, Guangzhou, Guangdong, Peoples R China; 2.Nanjing Univ Informat Sci & Technol, Minist Educ, Key Lab Meteorol Disaster, Nanjing, Jiangsu, Peoples R China; 3.Univ Hawaii Manoa, Int Pacific Res Ctr, Honolulu, HI 96822 USA; 4.Univ Hawaii Manoa, Dept Atmospher Sci, Honolulu, HI 96822 USA |
推荐引用方式 GB/T 7714 | He, Chao,Wang, Yuhao,Li, Tim. Weakened Impact of the Developing El Nino on Tropical Indian Ocean Climate Variability under Global Warming[J]. JOURNAL OF CLIMATE,2019,32(21):7265-7279. |
APA | He, Chao,Wang, Yuhao,&Li, Tim.(2019).Weakened Impact of the Developing El Nino on Tropical Indian Ocean Climate Variability under Global Warming.JOURNAL OF CLIMATE,32(21),7265-7279. |
MLA | He, Chao,et al."Weakened Impact of the Developing El Nino on Tropical Indian Ocean Climate Variability under Global Warming".JOURNAL OF CLIMATE 32.21(2019):7265-7279. |
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