DOI: 10.1175/JCLI-D-16-0519.1
Scopus记录号: 2-s2.0-85017120394
论文题名: Oceanic origins of historical southwest Asia precipitation during the boreal cold season
作者: Hoell A. ; Barlow M. ; Cannon F. ; Xu T.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2017
卷: 30, 期: 8 起始页码: 2885
结束页码: 2903
语种: 英语
Scopus关键词: Atmospheric pressure
; Atmospheric temperature
; Climate change
; Climatology
; Nickel
; Precipitation (chemical)
; Precipitation (meteorology)
; Surface waters
; Asia
; Atmospheric model simulations
; EL Nino
; La nina
; Precipitation anomalies
; Precipitation variability
; Sea surface temperatures
; Time-varying boundary conditions
; Oceanography
英文摘要: While a strong influence on cold season southwest Asia precipitation by Pacific sea surface temperatures (SSTs) has been previously established, the scarcity of southwest Asia precipitation observations prior to 1960 renders the region's long-term precipitation history largely unknown. Here a large ensemble of atmospheric model simulations forced by observed time-varying boundary conditions for 1901-2012 is used to examine the long-term sensitivity of November-April southwest Asia precipitation to Pacific SSTs. It is first established that the models are able to reproduce the key features of regional variability during the best-observed 1960-2005 period and then the pre-1960 variability is investigated using the model simulations. During the 1960-2005 period, both the mean precipitation and the two leading modes of precipitation variability during November-April are reasonably simulated by the atmospheric models, which include the previously identified relationships with El Niño-Southern Oscillation (ENSO) and the multidecadal warming of Indo-Pacific SSTs. Over the full 1901-2012 period, there are notable variations in precipitation and in the strength of the SST influence. A long-term drying of the region is associated with the Indo-Pacific warming, with a nearly 10% reduction in westernmost southwest Asia precipitation during 1938-2012. The influence of ENSO on southwest Asia precipitation varied in strength throughout the period: strong prior to the 1950s, weak between 1950 and 1980, and strongest after the 1980s. These variations were not antisymmetric between ENSO phases. El Niño was persistently related with anomalously wet conditions throughout 1901-2012, whereas La Niña was not closely linked to precipitation anomalies prior to the 1970s but has been associated with exceptionally dry conditions thereafter. © 2017 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49715
Appears in Collections: 气候变化事实与影响
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作者单位: Physical Sciences Division, NOAA/Earth System Research Laboratory, Boulder, CO, United States; Department of Environmental, Earth and Atmospheric Sciences, University of Massachusetts Lowell, Lowell, MA, United States; Department of Geography, University of California Santa Barbara, Santa Barbara, CA, United States; Cooperative Institute for Research in the Environmental Sciences, University of Colorado, Boulder, CO, United States; Physical Sciences Division, NOAA/Earth System Research Laboratory, Boulder, CO, United States; Center for Western Weather and Water Extremes, Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA, United States
Recommended Citation:
Hoell A.,Barlow M.,Cannon F.,et al. Oceanic origins of historical southwest Asia precipitation during the boreal cold season[J]. Journal of Climate,2017-01-01,30(8)