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DOI | 10.1007/s00382-018-4104-8 |
Interannual variability of the North Pacific winter storm track and its relationship with extratropical atmospheric circulation | |
Ma, Xiaojiao; Zhang, Yaocun | |
2018-11-01 | |
发表期刊 | CLIMATE DYNAMICS
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ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2018 |
卷号 | 51页码:3685-3698 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | Interannual variability of the North Pacific storm track and the three-dimensional atmosphere circulation during winter are investigated using NCEP/NCAR reanalysis data during 1950-2015. Results show that year-to-year variations of the storm track exhibit two principal modes, i.e. the monopole intensity change and the meridional shift of the storm track, respectively. The intensity change mode is linked to weakening of the Siberian high, northward shift of the western Pacific jet stream and Aleutian Low, and well corresponding to the Western Pacific teleconnection. The meridional shift mode is related to intensification and south-eastward extension of western Pacific jet stream and Aleutian Low, and linked to the Pacific-North America teleconnection. The internal atmospheric dynamics responsible for the storm track variability is further investigated from the perspective of wave-flow energy conversion. For the intensity change mode, accompanied by the enhanced baroclinity over the entrance region of the storm track, more energy is converted from mean available potential energy to eddy available potential energy and then transferred to eddy kinetic energy, which is favorable for the overall enhancement of the storm track intensity. For the meridional shift mode, more energy is transformed from mean available potential energy to eddy available potential energy and further transferred to eddy kinetic energy over the southern (northern) areas of the storm track, contributing to the southward (northward) shift of the storm track. Additionally, the increased (decreased) conversion from mean-flow kinetic energy to eddy kinetic energy over the north-eastern Pacific region is also in favor of the southward (northward) shift of the storm track. |
英文关键词 | Storm track variability Climate anomalies Wave-flow energy conversion |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000447366100029 |
WOS关键词 | TELECONNECTION PATTERN ; HEMISPHERE WINTER ; GEOPOTENTIAL HEIGHT ; VERTICAL STRUCTURE ; UNITED-STATES ; WAVES ; OSCILLATION ; MECHANISMS ; DYNAMICS ; IMPACTS |
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/35843 |
专题 | 气候变化 |
作者单位 | Nanjing Univ, Sch Atmospher Sci, 163 Xianlin Ave, Nanjing 210023, Jiangsu, Peoples R China |
推荐引用方式 GB/T 7714 | Ma, Xiaojiao,Zhang, Yaocun. Interannual variability of the North Pacific winter storm track and its relationship with extratropical atmospheric circulation[J]. CLIMATE DYNAMICS,2018,51:3685-3698. |
APA | Ma, Xiaojiao,&Zhang, Yaocun.(2018).Interannual variability of the North Pacific winter storm track and its relationship with extratropical atmospheric circulation.CLIMATE DYNAMICS,51,3685-3698. |
MLA | Ma, Xiaojiao,et al."Interannual variability of the North Pacific winter storm track and its relationship with extratropical atmospheric circulation".CLIMATE DYNAMICS 51(2018):3685-3698. |
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