globalchange  > 气候变化事实与影响
DOI: 10.1175/JCLI-D-12-00168.1
Scopus记录号: 2-s2.0-84874809338
论文题名:
Impacts of the bermuda high on regional climate and ozone over the United states
作者: Zhu J.; Liang X.-Z
刊名: Journal of Climate
ISSN: 8948755
出版年: 2013
卷: 26, 期:3
起始页码: 1018
结束页码: 1032
语种: 英语
Scopus关键词: Decadal variability ; General circulation model ; Interannual variability ; Model evaluation/performance ; Regional model ; Air cleaners ; Air quality ; Atmospheric temperature ; Ozone ; Climate models ; advection ; air quality ; air temperature ; annual variation ; atmospheric transport ; decadal variation ; general circulation model ; heating ; high pressure ; jet stream ; marine atmosphere ; ozone ; pollutant transport ; precipitation (climatology) ; regional climate ; sea surface temperature ; temperature anomaly ; Atlantic Ocean ; Bermuda ; Great Plains ; Gulf of Mexico ; Midwest ; United States
英文摘要: Observations reveal that, in summer, westward extension of the Bermuda high enhances the Great Plains low-level jet (LLJ) that transports more moisture northward, causing precipitation increases in the Midwest and decreases in the Gulf States. Meanwhile, more warm air advection from the Gulf of Mexico to the southern Great Plains and stronger clear-sky radiative heating under high pressures over the Southeast result in warmer surface temperatures across the Gulf states. The enhanced LLJ transport of cleaner marine air from the Gulf reduces surface ozone across the southern Great Plains-Midwest. In contrast, larger transport of more polluted air from the Midwest to New England and more frequent air stagnation under high pressures in the Southeast increase ozone over most of the eastern coastal states. This Bermuda high-induced ozone change reversal between the southern Great Plains-Midwest and eastern coastal states, with a magnitude of 6 and 13.5 ppb, respectively, in summer-mean maximum daily 8-h average, exhibits strong decadal variations that should be considered in the U.S. air quality dynamic management. The observed Bermuda high signatures over the Gulf states can be well captured by regional climate and air quality models. Notable model deficiencies exist over the northern Great Plains-Midwest that are more remote to the Bermuda high and LLJ control. The regional models largely reduce these deficiencies from general circulation models (GCMs). Only 7 out of 51 GCMs can represent all key regional signatures of the Bermuda high, while none can simulate its strong association with planetary sea surface temperature anomalies. The result indicates a great challenge for GCMs to predict Bermuda high variability and change. © 2013 American Meteorological Society.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52043
Appears in Collections:气候变化事实与影响

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作者单位: Earth System Science Interdisciplinary Center, University of Maryland, College Park, College Park, MD, United States; Earth System Science Interdisciplinary Center, Department of Atmospheric and Oceanic Science, University of Maryland, College Park, College Park, MD, United States

Recommended Citation:
Zhu J.,Liang X.-Z. Impacts of the bermuda high on regional climate and ozone over the United states[J]. Journal of Climate,2013-01-01,26(3)
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