Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JCLI-D-16-0513.1 |
Variations of Northern Hemisphere Storm Track and Extratropical Cyclone Activity Associated with the Madden-Julian Oscillation | |
Guo, Yanjuan1; Shinoda, Toshiaki1; Lin, Jialin2; Chang, Edmund K. M.3 | |
2017-07-01 | |
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:13 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | This study investigates the intraseasonal variations of the Northern Hemispheric storm track associated with the Madden-Julian oscillation (MJO) during the extended boreal winter (November-April) using 36 yr (1979-2014) of reanalysis data fromERA-Interim. Two methods have been used to diagnose storm-track variations. In the first method, the storm track is quantified by the temporal-filtered variance of 250-hPa meridional wind (vv250) ormean sea level pressure (pp). The intraseasonal anomalies of vv250 composited for eight MJO phases are characterized by a zonal band of strong positive (or negative) anomalies meandering from the Pacific all the way across North America and the Atlantic into northern Europe, with weaker anomalies of opposite sign at one or both flanks. The results based on pp are consistent with those based on vv250 except for larger zonal variations, which may be induced by surface topography. In the second method, an objective cyclone-tracking scheme has been used to track the extratropical cyclones that compose the storm track. The MJO-composite anomalies of the "accumulated'' cyclone activity, a quantity that includes contributions from both the cyclone frequency and cyclonemean intensity, are very similar to those based on pp. Further analysis demonstrates that major contribution comes from variations in the cyclone frequency. Further analysis suggests that the intraseasonal variations of the storm track can be primarily attributed to the variations of the mean flow that responds to the anomalous MJO convections in the tropics, with possible contribution also from the moisture variations. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000402380900002 |
WOS关键词 | INTRASEASONAL TIME SCALES ; GEOPOTENTIAL HEIGHT ; SOUTHERN-HEMISPHERE ; LIFE-CYCLES ; GULF-STREAM ; CIRCULATION ; WINTER ; PACIFIC ; VARIABILITY ; CONVECTION |
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/20230 |
专题 | 气候变化 |
作者单位 | 1.Texas A&M Univ Corpus Christi, Dept Phys & Environm Sci, Corpus Christi, TX 78412 USA; 2.Ohio State Univ, Dept Geog, Columbus, OH 43210 USA; 3.SUNY Stony Brook, Sch Marine & Atmospher Sci, Stony Brook, NY 11794 USA |
推荐引用方式 GB/T 7714 | Guo, Yanjuan,Shinoda, Toshiaki,Lin, Jialin,et al. Variations of Northern Hemisphere Storm Track and Extratropical Cyclone Activity Associated with the Madden-Julian Oscillation[J]. JOURNAL OF CLIMATE,2017,30(13). |
APA | Guo, Yanjuan,Shinoda, Toshiaki,Lin, Jialin,&Chang, Edmund K. M..(2017).Variations of Northern Hemisphere Storm Track and Extratropical Cyclone Activity Associated with the Madden-Julian Oscillation.JOURNAL OF CLIMATE,30(13). |
MLA | Guo, Yanjuan,et al."Variations of Northern Hemisphere Storm Track and Extratropical Cyclone Activity Associated with the Madden-Julian Oscillation".JOURNAL OF CLIMATE 30.13(2017). |
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