DOI: 10.1175/JCLI-D-14-00726.1
Scopus记录号: 2-s2.0-84947568298
论文题名: Key role of the North Pacific oscillation-West Pacific pattern in generating the extreme 2013/14 North American Winter
作者: Baxter S. ; Nigam S.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期: 20 起始页码: 8109
结束页码: 8117
语种: 英语
英文摘要: The 2013/14 boreal winter (December 2013-February 2014) brought extended periods of anomalously cold weather to central and eastern North America. The authors show that a leading pattern of extratropical variability, whose sea level pressure footprint is the North Pacific Oscillation (NPO) and circulation footprint the West Pacific (WP) teleconnection-together, the NPO-WP-exhibited extreme and persistent amplitude in this winter. Reconstruction of the 850-hPa temperature, 200-hPa geopotential height, and precipitation reveals that the NPO-WP was the leading contributor to the winter climate anomaly over large swaths of North America. This analysis, furthermore, indicates that NPO-WP variability explains the most variance of monthly winter temperature over central-eastern North America since, at least, 1979. Analysis of the NPO-WP related thermal advection provides physical insight on the generation of the cold temperature anomalies over North America. Although NPO-WP's origin and development remain to be elucidated, its concurrent links to tropical SSTs are tenuous. These findings suggest that notable winter climate anomalies in the Pacific-North American sector need not originate, directly, from the tropics. More broadly, the attribution of the severe 2013/14 winter to the flexing of an extratropical variability pattern is cautionary given the propensity to implicate the tropics, following several decades of focus on El Niño-Southern Oscillation and its regional and far-field impacts. © 2015 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50796
Appears in Collections: 气候变化事实与影响
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作者单位: Climate Prediction Center, NOAA/NWS/NCEP, College Park, MD, United States; University of Maryland, College Park, College Park, MD, United States
Recommended Citation:
Baxter S.,Nigam S.. Key role of the North Pacific oscillation-West Pacific pattern in generating the extreme 2013/14 North American Winter[J]. Journal of Climate,2015-01-01,28(20)