DOI: 10.1002/2015JD023266
论文题名: High-resolution modeling of atmospheric dynamics in the Nepalese Himalaya
作者: Collier E. ; Immerzeel W.W.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2015
卷: 120, 期: 19 起始页码: 9882
结束页码: 9896
语种: 英语
英文关键词: high-resolution atmospheric modeling
; Himalayan meteorology
; temperature lapse rates and precipitation gradients
; WRF model
Scopus关键词: air temperature
; atmospheric circulation
; atmospheric convection
; atmospheric dynamics
; atmospheric lapse rate
; atmospheric modeling
; complex terrain
; precipitation assessment
; spatial resolution
; spatiotemporal analysis
; topographic effect
; tropical meteorology
; westerly
; Bagmati
; Himalayas
; Langtang Valley
; Nepal
英文摘要: High-altitude meteorological processes in the Himalaya are influenced by complex interactions between the topography and the monsoon and westerly circulation systems. In this study, we use the Weather Research and Forecasting model configured with high spatial resolution to understand seasonal patterns of near-surface meteorological fields and precipitation processes in the Langtang catchment in the central Himalaya. Using a unique high-altitude observational network, we evaluate a simulation from 17 June 2012 to 16 June 2013 and conclude that, at 1 km horizontal grid spacing, the model captures the main features of observed meteorological variability in the catchment. The finer representation of the complex terrain and explicit simulation of convection at this grid spacing give strong improvements in near-surface air temperature and small improvements in precipitation, in particular in the magnitudes of daytime convective precipitation and at higher elevations. The seasonal differences are noteworthy, including a reversal in the vertical and along-valley distributions of precipitation between the monsoon and winter seasons, with peak values simulated at lower altitudes (~3000 m above sea level (asl)) and in the upper regions (above 5000 m asl) in each season, respectively. We conclude that there is great potential for improving the local accuracy of climate change impact studies in the Himalaya by using high-resolution atmospheric models to generate the forcing for such studies. ©2015. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63000
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Department of Physical Geography, Utrecht University, Utrecht, Netherlands
Recommended Citation:
Collier E.,Immerzeel W.W.. High-resolution modeling of atmospheric dynamics in the Nepalese Himalaya[J]. Journal of Geophysical Research: Atmospheres,2015-01-01,120(19)