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DOI | 10.1175/JCLI-D-17-0534.1 |
Impacts of the Madden-Julian Oscillation on Storm-Track Activity, Surface Air Temperature, and Precipitation over North America | |
Zheng, Cheng1; Chang, Edmund Kar-Man1; Kim, Hye-Mi1; Zhang, Minghua1; Wang, Wanqiu2 | |
2018-08-01 | |
发表期刊 | JOURNAL OF CLIMATE |
ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2018 |
卷号 | 31期号:15页码:6113-6134 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | In this study, the intraseasonal variations in storm-track activity, surface air temperature, and precipitation over North America associated with the Madden-Julian oscillation (MJO) in boreal winter (November-April) are investigated. A lag composite strategy that considers different MJO phases and different lag days is developed. The results highlight regions over which the MJO has significant impacts on surface weather on intraseasonal time scales. A north-south shift of storm-track activity associated with the MJO is found over North America. The shift is consistent with the MJO-related surface air temperature anomaly over the eastern United States. In many regions over the western, central, and southeastern United States, the MJO-related precipitation signal is also consistent with nearby storm-track activity. An MJO-related north-south shift of precipitation is also found near the west coast of North America, with the precipitation over California being consistent with the MJO-related storm-track activity over the eastern Pacific. MJO-related temperature and storm-track anomalies are also found near Alaska. Further analyses of streamfunction anomalies and wave activity flux show clear signatures of Rossby wave trains excited by convection anomalies related to MJO phases 3 and 8. These wave trains propagate across the Pacific and North America, bringing an anticyclonic (cyclonic) anomaly to the eastern part of North America, shifting the westerly jet to the north (south), thereby modulating the surface air temperature and storm-track activity over the continent. Rossby waves associated with phases 2 and 6 are also found to impact the U.S. West Coast. |
英文关键词 | Rossby waves Madden-Julian oscillation Precipitation Storm tracks Temperature Intraseasonal variability |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000437092900007 |
WOS关键词 | EXTRATROPICAL CYCLONE ACTIVITY ; CONTIGUOUS UNITED-STATES ; EXTREME PRECIPITATION ; WINTERTIME CIRCULATION ; ARCTIC OSCILLATION ; MJO ; EVENTS ; HEMISPHERE ; MODULATION ; MECHANISMS |
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/20250 |
专题 | 气候变化 |
作者单位 | 1.SUNY Stony Brook, Sch Marine & Atmospher Sci, Stony Brook, NY 11794 USA; 2.NOAA, Climate Predict Ctr, College Pk, MD USA |
推荐引用方式 GB/T 7714 | Zheng, Cheng,Chang, Edmund Kar-Man,Kim, Hye-Mi,et al. Impacts of the Madden-Julian Oscillation on Storm-Track Activity, Surface Air Temperature, and Precipitation over North America[J]. JOURNAL OF CLIMATE,2018,31(15):6113-6134. |
APA | Zheng, Cheng,Chang, Edmund Kar-Man,Kim, Hye-Mi,Zhang, Minghua,&Wang, Wanqiu.(2018).Impacts of the Madden-Julian Oscillation on Storm-Track Activity, Surface Air Temperature, and Precipitation over North America.JOURNAL OF CLIMATE,31(15),6113-6134. |
MLA | Zheng, Cheng,et al."Impacts of the Madden-Julian Oscillation on Storm-Track Activity, Surface Air Temperature, and Precipitation over North America".JOURNAL OF CLIMATE 31.15(2018):6113-6134. |
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