| DOI: | 10.1175/JCLI-D-16-0524.1
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| Scopus记录号: | 2-s2.0-85012257219
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| 论文题名: | Causes of extreme ridges that induce california droughts |
| 作者: | Teng H.; Branstator G.
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| 刊名: | Journal of Climate
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| ISSN: | 8948755
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| 出版年: | 2017
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| 卷: | 30, 期:4 | | 起始页码: | 1477
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| 结束页码: | 1492
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| 语种: | 英语
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| Scopus关键词: | Climate change
; Climate models
; Drought
; Heating
; Time measurement
; Atmospheric circulation
; Climate variability
; Diabatic heating
; Interannual variability
; North American
; Climatology
; annual variation
; atmospheric circulation
; climate change
; climate modeling
; climate variation
; diabatic process
; drought
; El Nino-Southern Oscillation
; teleconnection
; California
; United States
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| 英文摘要: | California droughts are often caused by high-amplitude and persistent ridges near and off the west coast of North America without apparent connections with ENSO. Here with a hierarchy of climate models, it is demonstrated that extreme ridges in this region are associated with a continuum of zonal wavenumber-5 circumglobal teleconnection patterns that originate from midlatitude atmospheric internal dynamics. Although tropical diabatic heating anomalies are not essential to the formation and maintenance of these wave patterns, certain persistent heating anomalies may double the probability of ridges with amplitudes in the 90th percentile occurring on interannual time scales. Those heating anomalies can be caused by either natural variability or possibly by climate change, and they do not necessarily depend on ENSO. The extreme ridges that occurred during the 2013/14 and 2014/15 winters could be examples of ridges produced by heating anomalies that are not associated with ENSO. This mechanism could provide a source of subseasonal-to-interannual predictability beyond the predictability provided by ENSO. © 2017 American Meteorological Society. |
| 资助项目: | NASA, National Aeronautics and Space Administration
; NSF, National Science Foundation
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/49833
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| Appears in Collections: | 气候变化事实与影响
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作者单位: | National Center for Atmospheric Research, Boulder, CO, United States
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| Recommended Citation: | |
Teng H.,Branstator G.. Causes of extreme ridges that induce california droughts[J]. Journal of Climate,2017-01-01,30(4)
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