DOI: 10.1007/s00382-015-2500-x
Scopus记录号: 2-s2.0-84946480621
论文题名: The influence of the Interdecadal Pacific Oscillation on Temperature and Precipitation over the Globe
作者: Dong B. ; Dai A.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2015
卷: 45, 期: 2017-09-10 起始页码: 2667
结束页码: 2681
语种: 英语
英文关键词: Climate transition
; IPO
; Pacific SST
; PDO
; Precipitation
; Temperature
英文摘要: The Interdecadal Pacific Oscillation (IPO) is a 40–60 year quasi-oscillation seen mostly in the Pacific basin, but its impacts on surface temperature (T) and precipitation (P) have been found over Australia, the Southwest U.S. and other regions. Here, a global analysis of IPO’s impacts on T and P and its modulation of ENSO’s influence on T and P over the globe is performed using observational and reanalysis data and model simulations. Since 1920, there are two warm (1924–1944 and 1977–1998) and two cold (1945–1976 and 1999–present) IPO phases, whose change is associated with abrupt shifts in North Pacific sea level pressure (SLP) and contrasting anomaly patterns in T and P and atmospheric circulation over the eastern and western Pacific. The IPO explains more than half of the interdecadal variations in T and P over many regions, such as northeastern Australia, western Canada and northern India. Significant correlations between the IPO and local P are observed over eastern Australia, southern Africa and the Southwest U.S. The IPO also modulates ENSO’s influence on local T and P over most of these regions. T over northern India is positively correlated with Niño3.4 ENSO index during cold IPO phases but the correlation turns negative or insignificant during IPO warm phases. Over northeastern Australia, the T versus ENSO and P versus ENSO correlations are stronger during the IPO cold phases than during the warm phases. The P versus ENSO correlation over southern Africa tends to be negative during IPO warm phases but becomes weaker or insignificant during IPO cold phases. The IPO-induced P anomalies can be explained by the associated anomaly circulation, which is characterized by a high SLP center and anti-cyclonic flows over the North Pacific, and negative SLP anomalies and increased wind convergence over the Indonesia and western Pacific region during IPO cold phases. These observed influences of the IPO on regional T and P are generally reproduced by an atmospheric model forced by observed sea surface temperatures. © 2015, Springer-Verlag Berlin Heidelberg. 资助项目: NSF, U.S. Department of Energy
; DOE, U.S. Department of Energy
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/53950
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Atmospheric and Environmental Sciences, University at Albany, State University of New York (SUNY), Albany, NY, United States; National Center for Atmospheric Research (NCAR), Boulder, CO, United States
Recommended Citation:
Dong B.,Dai A.. The influence of the Interdecadal Pacific Oscillation on Temperature and Precipitation over the Globe[J]. Climate Dynamics,2015-01-01,45(2017-09-10)