DOI: 10.1175/JCLI-D-16-0512.1
Scopus记录号: 2-s2.0-85019118820
论文题名: Impact of mountains on tropical circulation in two earth system models
作者: Naiman Z. ; Goodman P.J. ; Krasting J.P. ; Malyshev S.L. ; Russell J.L. ; Stouffer R.J. ; Wittenberg A.T.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2017
卷: 30, 期: 11 起始页码: 4149
结束页码: 4163
语种: 英语
Scopus关键词: Atmospheric pressure
; Climatology
; Earth (planet)
; Landforms
; Nickel
; Tropics
; Climate classification/regimes
; Climate variability
; Earth system model
; Hadley circulation
; Interannual time scale
; Paleoclimates
; Southern oscillation
; Walker circulation
; Climate models
; Pomatiopsis californica
英文摘要: Two state-of-the-art Earth system models (ESMs) were used in an idealized experiment to explore the role of mountains in shaping Earth's climate system. Similar to previous studies, removing mountains from both ESMs results in the winds becoming more zonal and weaker Indian and Asian monsoon circulations. However, there are also broad changes to the Walker circulation and El Niño-Southern Oscillation (ENSO). Without orography, convection moves across the entire equatorial Indo-Pacific basin on interannual time scales. ENSO has a stronger amplitude, lower frequency, and increased regularity. A wider equatorial wind zone and changes to equatorial wind stress curl result in a colder cold tongue and a steeper equatorial thermocline across the Pacific basin during La Niña years. Anomalies associated with ENSO warm events are larger without mountains and have greater impact on the mean tropical climate than when mountains are present. Without mountains, the centennial-mean Pacific Walker circulation weakens in both models by approximately 45%, but the strength of the mean Hadley circulation changes by less than 2%. Changes in the Walker circulation in these experiments can be explained by the large spatial excursions of atmospheric deep convection on interannual time scales. These results suggest that mountains are an important control on the large-scale tropical circulation, impacting ENSO dynamics and the Walker circulation, but have little impact on the strength of the Hadley circulation. © 2017 American Meteorological Society. 资助项目: NSF, National Science Foundation
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/48883
Appears in Collections: 气候变化与战略
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作者单位: Department of Geosciences, The University of Arizona, Tucson, AZ, United States; NOAA/Geophysical Fluid Dynamics Laboratory, Princeton, NJ, United States; Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ, United States
Recommended Citation:
Naiman Z.,Goodman P.J.,Krasting J.P.,et al. Impact of mountains on tropical circulation in two earth system models[J]. Journal of Climate,2017-01-01,30(11)