Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JCLI-D-19-0211.1 |
Energetics of the Western Hemisphere Circulation Pattern | |
Tan, Xin; Bao, Ming; Ren, Xuejuan | |
2019-11-01 | |
发表期刊 | JOURNAL OF CLIMATE |
ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2019 |
卷号 | 32期号:22页码:7857-7870 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | The Western Hemisphere (WH) circulation pattern, identified by self-organizing maps cluster analysis, is a low-frequency atmospheric regime that influences the fluctuations of large-scale circulation over the North Pacific-North American-North Atlantic areas. The reanalysis datasets from ECMWF are used to estimate the energetics of the WH pattern in this study. The composite results based on monthly WH events reveal that the kinetic energy (KE) associated with the WH pattern is maintained through the barotropic conversion from the climatological-mean westerlies, mainly in the Atlantic jet exit regions. The KE could also be gained through the barotropic feedback forcing from transient eddies. The corresponding baroclinic conversion of available potential energy (APE) from the climatological-mean state, which contributes most efficiently to the energy maintenance of the WH pattern, is obvious in the middle and lower troposphere, owing to the thermal contrast of the colder continent and warmer ocean over the North America-North Atlantic sector. The baroclinic conversion associated with the heat flux on the climatological temperature gradient is consistent with the southwestward-tilting height anomalies from 850 to 500 hPa. The baroclinic feedback from transient eddies contributes negatively to the energy conversion and destroys the maintenance of the WH pattern. |
英文关键词 | Northern Hemisphere Atmospheric circulation Forcing Teleconnections Waves atmospheric Climate variability |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000491924000001 |
WOS关键词 | VERTICAL STRUCTURE ; TELECONNECTION PATTERN ; VARIABILITY ; DYNAMICS ; PROPAGATION ; MAINTENANCE ; GROWTH |
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/188123 |
专题 | 气候变化 |
作者单位 | Nanjing Univ, Sch Atmospher Sci, Nanjing, Jiangsu, Peoples R China |
推荐引用方式 GB/T 7714 | Tan, Xin,Bao, Ming,Ren, Xuejuan. Energetics of the Western Hemisphere Circulation Pattern[J]. JOURNAL OF CLIMATE,2019,32(22):7857-7870. |
APA | Tan, Xin,Bao, Ming,&Ren, Xuejuan.(2019).Energetics of the Western Hemisphere Circulation Pattern.JOURNAL OF CLIMATE,32(22),7857-7870. |
MLA | Tan, Xin,et al."Energetics of the Western Hemisphere Circulation Pattern".JOURNAL OF CLIMATE 32.22(2019):7857-7870. |
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