DOI: 10.1175/JCLI-D-14-00413.1
Scopus记录号: 2-s2.0-84942912483
论文题名: Atmospheric responses to North Atlantic SST anomalies in idealized experiments. Part I: Northern hemispheric circulation
作者: Veres M. ; Hu Q.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期: 15 起始页码: 6204
结束页码: 6220
语种: 英语
Scopus关键词: Atmospheric movements
; Atmospheric temperature
; Atmospherics
; Climate change
; Climatology
; Meteorology
; Submarine geophysics
; Surface properties
; Surface waters
; Waves
; Atmospheric circulation
; Continental forcing
; Numerical analysis/modeling
; Orographic effects
; Sea surface temperature (SST)
; Oceanography
; air-sea interaction
; atmospheric circulation
; atmospheric forcing
; Northern Hemisphere
; numerical model
; orographic effect
; sea surface temperature
; temperature anomaly
; Atlantic Ocean
; Atlantic Ocean (North)
英文摘要: Idealized model experiments using the NCAR CESM1.0.5 under equinox conditions are designed and performed to address two fundamental questions about the effects of the sea surface temperature (SST) variation associated with the Atlantic multidecadal oscillation (AMO) on circulation and precipitation in North America and Europe: 1) Is the observed relationship between the AMOSST and the warm-season precipitation in North America a statistical coincidence? and 2)Why is the response of negative precipitation anomaly to warm SST in the AMO fairly uniform across most of North America, whereas the positive precipitation anomaly in the cold SST rather spotty? Model experiments are done with either a warm or cold SST anomaly in an aquaplanet, a planet with idealized continents, and a planet with both idealized continents and orography. Major results show that the atmospheric response to warm SST anomaly in the North Atlantic is fairly similar among the three sets of experiments. In the lower troposphere, the response has a significant negative geopotential anomaly from the SST anomaly center to the east and a positive geopotential anomaly in upstream North America. However, the response to the cold SST anomaly changes considerably among these experiments, particularly in North America. These results provide a foundation to answer the above mentioned two questions. First, they show that there is physical connection of the AMO SST and atmospheric circulation anomalies in North America. Moreover, the rather stable atmospheric response to the warm SST may explain the observed largely consistent response to the warm SST anomaly. The varying responses of the atmosphere to the cold SST indicate a strong sensitivity of the atmosphere to other forcings during the cold SST anomaly in the North Atlantic. This sensitivity could explain the varying and less stable response of the atmosphere to the cold SST during the AMO. © 2015 American Meteorological Society. 资助项目: NSF, National Oceanic and Atmospheric Administration
; NOAA, National Oceanic and Atmospheric Administration
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50721
Appears in Collections: 气候变化事实与影响
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作者单位: School of Natural Resources, Department of Earth and Atmospheric Sciences, University of Nebraska-Lincoln, Lincoln, NE, United States
Recommended Citation:
Veres M.,Hu Q.. Atmospheric responses to North Atlantic SST anomalies in idealized experiments. Part I: Northern hemispheric circulation[J]. Journal of Climate,2015-01-01,28(15)