DOI: 10.1007/s00382-012-1598-3
Scopus记录号: 2-s2.0-84884704778
论文题名: A regional modeling study of the diurnal cycle in the lower troposphere in the south-eastern tropical Pacific
作者: Toniazzo T. ; Sun F. ; Mechoso C.R. ; Hall A.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2013
卷: 41, 期: 2017-07-08 起始页码: 1899
结束页码: 1922
语种: 英语
英文关键词: Diurnal circulations
; Diurnal cycle
; Gravity waves
; South-eastern Pacific
英文摘要: We examine the influence of the South-American land-mass and its mountains on the significant cyclic diurnal and semidiurnal components of the average circulation in the adjacent area of the southeastern tropical Pacific (SEP). Our approach is based on a number of numerical simulations with the regional atmospheric model weather research and forecasting forced by the National Centers for Environmental Prediction's final analysis operational analysis data. In the control simulation the model domain covers the SEP and a large part of South America. In several sensitivity experiments the domain is reduced to progressively exclude continental areas. We find that the mean diurnal cycle is sensitive to model domain in ways that reveal the existence of different contributions originating from the Chilean and Peruvian land-masses. The experiments suggest that diurnal variations in circulations and thermal structures over the SEP (mainly forced by local insolation) are influenced by convection over the Peruvian sector of the Andes cordillera, while the mostly dry mountain-breeze circulations force an additional component that results in semi-diurnal variations near the coast. A series of numerical tests, however, reveal sensitivity of the simulations to the choice of vertical grid, limiting the possibility of solid quantitative statements on the amplitudes and phases of the diurnal and semidiurnal components across the domain. © 2012 Springer-Verlag Berlin Heidelberg.
资助项目: NSF, National Science Foundation
; DOE, U.S. Department of Energy
; NERC, Natural Environment Research Council
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54774
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Meteorology, University of Reading, PO Box 243, Reading, Berkshire, RG6 6BB, United Kingdom; University of California, Los Angeles, Los Angeles, CA, United States
Recommended Citation:
Toniazzo T.,Sun F.,Mechoso C.R.,et al. A regional modeling study of the diurnal cycle in the lower troposphere in the south-eastern tropical Pacific[J]. Climate Dynamics,2013-01-01,41(2017-07-08)