DOI: 10.1175/JCLI-D-17-0324.1
Scopus记录号: 2-s2.0-85048148006
论文题名: Importance of the resolution of surface topography in Indian monsoon simulation
作者: Mishra S.K. ; Anand A. ; Fasullo J. ; Bhagat S.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2018
卷: 31, 期: 12 起始页码: 4879
结束页码: 4898
语种: 英语
英文关键词: Atmosphere
; Climate models
; Monsoons
; Numerical analysis/modeling
Scopus关键词: Atmospheric movements
; Atmospheric temperature
; Atmospheric thermodynamics
; Climate models
; Earth atmosphere
; Sea level
; Surface waters
; Topography
; Atmospheric process
; Community atmospheric model
; Ensemble simulation
; Indian summer monsoon
; Monsoons
; Numerical analysis/modeling
; Sea surface temperature (SST)
; Surface air temperatures
; Surface topography
; atmospheric modeling
; climate modeling
; computer simulation
; ensemble forecasting
; monsoon
; orographic effect
; sea surface temperature
; topographic effect
; China
; Himalayas
; India
; Xizang
英文摘要: The influence of surface topography resolution in Indian summer monsoon simulation is investigated. Three sets of six-member ensemble simulations with climatological sea surface temperature are conducted with the Community Atmospheric Model, version 5.1 (CAM5.1): COARSE simulation at 1.9° × 2.5° latitude-longitude resolution, FINE simulation at 0.47° × 0.63° resolution, and HYBRID simulation, that is, using COARSE surface topography imposed on the FINE configuration. With regard to the representation of the surface topography, substantial differences occur at the regional scales between the simulations, especially over the foothills and steep flanks of the mountains. In the COARSE and HYBRID simulations, the orographic height of the foothills is overestimated whereas that of the steep flanks adjacent to the foothills is underestimated. The biases are severe (up to 1 km) over the Himalayas and Tibet and have detrimental effects on regional climate through barrier effects on the low-level flow, and the lapse rate and elevated heat source effects. Overall, the simulations show remarkable improvement with an increase in resolution, mainly because of the improved representation of atmospheric and surface processes. However, local climate-surface air temperature, sea level pressure, precipitable water, and wind-of the orographic regions, particularly where large orographic biases exist in COARSE, is found to benefit substantially from increased resolution of surface topography. Local precipitation and evaporation are exceptions, although, as they are negligibly sensitive to topographic resolution, showing strong dependence on the resolution of surface and atmospheric processes. Moreover, resolution of surface topography generally does not have notable remote impacts. © 2018 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111509
Appears in Collections: 气候减缓与适应
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作者单位: Centre for Atmospheric Sciences, Indian Institute of Technology Delhi, Delhi, India; National Center for Atmospheric Research, Boulder, CO, United States; Department of Civil Engineering, Indian Institute of Technology Delhi, Delhi, India
Recommended Citation:
Mishra S.K.,Anand A.,Fasullo J.,et al. Importance of the resolution of surface topography in Indian monsoon simulation[J]. Journal of Climate,2018-01-01,31(12)