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DOI | 10.1007/s00382-017-3598-9 |
Changes in atmospheric rivers and moisture transport over the Northeast Pacific and western North America in response to ENSO diversity | |
Kim, Hye-Mi1; Zhou, Yang1; Alexander, Michael A.2 | |
2019-06-01 | |
发表期刊 | CLIMATE DYNAMICS
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ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2019 |
卷号 | 52期号:12页码:7375-7388 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The year-to-year changes in atmospheric rivers (ARs) and moisture transport over the northeast Pacific and western North America are investigated during December to February (DJF) from 1979/80 to 2015/16. Changes in AR frequency, intensity, and landfall characteristics are compared between three ENSO phases: central Pacific El Nino (CPEN), eastern Pacific El Nino (EPEN), and La Nina (NINA). During EPEN events, the subtropical jet extends to the south and east with an anomalous cyclonic flow around a deeper Aleutian Low. More moisture is transported towards North America and AR frequency is increased over western North America. In CPEN events, the Aleutian low shifts further southward relative to its position in EPEN, resulting in an increase in the frequency and intensity of landfalling ARs over the southwestern US. In NINA events, the landfalling AR frequency is reduced associated with anomalous anticyclonic circulation over the eastern North Pacific. We diagnose the contribution of multiple factors to the seasonal mean moisture transport using moisture budgets. During the three ENSO phases, the change in low-frequency circulation (dynamical process) is the leading contributor to the seasonal mean moisture flux divergence, while the contributions of the synoptic anomalies and the change in moisture anomaly (thermodynamic process) are not significant along the west coast of North America. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000469017000016 |
WOS关键词 | WINTER PRECIPITATION ; CONNECTION ; MODULATION ; SIGNATURE ; IMPACT ; COAST |
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/183516 |
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, Earth Syst Res Lab, Boulder, CO USA |
推荐引用方式 GB/T 7714 | Kim, Hye-Mi,Zhou, Yang,Alexander, Michael A.. Changes in atmospheric rivers and moisture transport over the Northeast Pacific and western North America in response to ENSO diversity[J]. CLIMATE DYNAMICS,2019,52(12):7375-7388. |
APA | Kim, Hye-Mi,Zhou, Yang,&Alexander, Michael A..(2019).Changes in atmospheric rivers and moisture transport over the Northeast Pacific and western North America in response to ENSO diversity.CLIMATE DYNAMICS,52(12),7375-7388. |
MLA | Kim, Hye-Mi,et al."Changes in atmospheric rivers and moisture transport over the Northeast Pacific and western North America in response to ENSO diversity".CLIMATE DYNAMICS 52.12(2019):7375-7388. |
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