Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JCLI-D-16-0349.1 |
The Role of Tropical Interbasin SST Gradients in Forcing Walker Circulation Trends | |
Zhang, Lei1; Karnauskas, Kristopher B.1,2 | |
2017 | |
发表期刊 | JOURNAL OF CLIMATE
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ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2017 |
卷号 | 30期号:2 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The effects of externally forced tropical sea surface temperature (SST) anomalies on long-term Walker circulation changes are investigated through numerical atmospheric general circulation model (AGCM) experiments. In response to the observed tropics-wide SST trend, which exhibits a prominent interbasin warming contrast (IBWC) with smaller warming in the Pacific than the Indian and Atlantic Oceans that includes a weak La Nina-like pattern in the equatorial Pacific, pronounced low-level easterly anomalies emerge over the equatorial Pacific. Through sensitivity experiments, the intensification of the Pacific trade winds (PTWs) is attributable to the IBWC, whereas the slightly enhanced zonal SST gradient within the equatorial Pacific plays a small role relative to the observed IBWC. It is further demonstrated that the greater Indian Ocean warming forces low-level easterly anomalies over the entire equatorial Pacific, while the greater tropical Atlantic warming-driven enhancement of PTWs is located over the central equatorial Pacific. In contrast to observations, a negligible IBWC emerges in the tropical SST trends of CMIP5 historical simulations due to a strong El Nino-like warming in the tropical Pacific. Lacking the observed IBWC (and the observed enhancement of the zonal SST gradient within the equatorial Pacific), the PTWs in the CMIP5 ensemble can only weaken. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000391856300004 |
WOS关键词 | SEA-SURFACE TEMPERATURE ; WARMING HIATUS ; PACIFIC-OCEAN ; VARIABILITY ; MODEL ; INTENSIFICATION ; PREDICTIONS ; MONSOON ; DECADES ; DRIVEN |
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/20193 |
专题 | 气候变化 |
作者单位 | 1.Univ Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80309 USA; 2.Univ Colorado, Dept Atmospher & Ocean Sci, Boulder, CO 80309 USA |
推荐引用方式 GB/T 7714 | Zhang, Lei,Karnauskas, Kristopher B.. The Role of Tropical Interbasin SST Gradients in Forcing Walker Circulation Trends[J]. JOURNAL OF CLIMATE,2017,30(2). |
APA | Zhang, Lei,&Karnauskas, Kristopher B..(2017).The Role of Tropical Interbasin SST Gradients in Forcing Walker Circulation Trends.JOURNAL OF CLIMATE,30(2). |
MLA | Zhang, Lei,et al."The Role of Tropical Interbasin SST Gradients in Forcing Walker Circulation Trends".JOURNAL OF CLIMATE 30.2(2017). |
条目包含的文件 | 条目无相关文件。 |
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