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DOI | 10.1175/JCLI-D-17-0232.1 |
Large-Scale Circulation Anomalies and Intraseasonal Oscillations Associated with Long-Lived Extreme Heat Events in South China | |
Chen, Ruidan1,2,3,4; Wen, Zhiping4,5; Lu, Riyu3,6 | |
2018 | |
发表期刊 | JOURNAL OF CLIMATE
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ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2018 |
卷号 | 31期号:1页码:213-232 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | South China experiences extreme heat (EH) most frequently in eastern China. This study specifically explores the large-scale circulation anomalies associated with long-lived EH events in south China. The results show that there is an anomalous cyclone (anticyclone) and active (inactive) convection over south China (the western Pacific) before the EH onset; then, an anticyclone develops and moves northwestward and dominates over south China on the onset day. The anomalous anticyclone maintains its strength over south China and then diminishes and is replaced by another cyclone migrating from the western Pacific after the final day of the EH event. Consequently, the temperature increases over south China around the onset day and is anomalously warm for approximately 10 days on average and then decreases shortly thereafter. The fluctuating anomalies over south China and the western Pacific are intimately related to two intraseasonal oscillation (ISO) modes, namely, the 5-25- and 30-90-day oscillations, which originate from the tropical western Pacific and propagate northwestward. The 5-25-day oscillation is vital to triggering and terminating EH, accounting for approximately half of the original temperature and circulation anomaly transitions. The 30-90-day oscillation favors the persistent warming during EH events, accounting for approximately one-third of the original prolonged warming and anticyclonic anomaly. This result suggests that different ISO modes play crucial roles at different stages of the events. Moreover, a higher annual frequency of long-lived EH days in south China is associated with the transition phase from El Nino to La Nina. It is suggested that both medium-range and interannual forecasting of long-lived EH in south China are possible. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000429528800012 |
WOS关键词 | HIGH-TEMPERATURE EXTREMES ; WESTERN NORTH PACIFIC ; INDIAN-OCEAN ; SUMMER ; CLIMATE ; WAVES ; PROJECTIONS ; WEATHER ; MONSOON ; TRENDS |
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/19626 |
专题 | 气候变化 |
作者单位 | 1.Sun Yat Sen Univ, Ctr Monsoon & Environm Res, Guangzhou, Guangdong, Peoples R China; 2.Sun Yat Sen Univ, Sch Atmospher Sci, Guangdong Prov Key Lab Climate Change & Nat Disas, Guangzhou, Guangdong, Peoples R China; 3.Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Numer Modeling Atmospher Sci & Geop, Beijing, Peoples R China; 4.Jiangsu Collaborat Innovat Ctr Climate Change, Nanjing, Jiangsu, Peoples R China; 5.Fudan Univ, Inst Atmospher Sci, Shanghai, Peoples R China; 6.Univ Chinese Acad Sci, Beijing, Peoples R China |
推荐引用方式 GB/T 7714 | Chen, Ruidan,Wen, Zhiping,Lu, Riyu. Large-Scale Circulation Anomalies and Intraseasonal Oscillations Associated with Long-Lived Extreme Heat Events in South China[J]. JOURNAL OF CLIMATE,2018,31(1):213-232. |
APA | Chen, Ruidan,Wen, Zhiping,&Lu, Riyu.(2018).Large-Scale Circulation Anomalies and Intraseasonal Oscillations Associated with Long-Lived Extreme Heat Events in South China.JOURNAL OF CLIMATE,31(1),213-232. |
MLA | Chen, Ruidan,et al."Large-Scale Circulation Anomalies and Intraseasonal Oscillations Associated with Long-Lived Extreme Heat Events in South China".JOURNAL OF CLIMATE 31.1(2018):213-232. |
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