DOI: 10.1002/2014MS000414
Scopus记录号: 2-s2.0-85027920852
论文题名: Precipitation over East Asia simulated by NCAR CAM5 at different horizontal resolutions
作者: Li J ; , Yu R ; , Yuan W ; , Chen H ; , Sun W ; , Zhang Y
刊名: Journal of Advances in Modeling Earth Systems
ISSN: 19422466
出版年: 2015
卷: 7, 期: 2 起始页码: 774
结束页码: 790
语种: 英语
英文关键词: Flow fields
; Precipitation (chemical)
; Precipitation (meteorology)
; Rain
; Annual mean precipitation
; Community atmosphere model
; East Asia
; Frequency structure
; Horizontal resolution
; Long term simulation
; National center for atmospheric researches
; Resolution increase
; Climate models
; atmospheric modeling
; climate modeling
; monsoon
; orographic effect
; precipitation intensity
; rainfall
; simulation
; spatiotemporal analysis
; China
; Far East
; Qinghai-Xizang Plateau
英文摘要: Long-term simulations using version 5.1 of the National Center for Atmospheric Research' Community Atmosphere Model at low (T42), medium (T106), and high (T266) resolutions were carried out to study the impact of horizontal resolution on the model's performance in reproducing the climatological features of precipitation over East Asia. The simulated spatial pattern of annual mean precipitation amount improves significantly with increased resolution. The low-resolution model is inadequate to reproduce the precipitation closely associated with fine-scale orographic forcing, such as the narrow large-rainfall belt along the southern edge of the Tibetan Plateau. The distribution of rainfall over and around the elevation of the Tibetan Plateau and high-altitude mountains becomes more realistic at higher resolutions. The proportion of the large-bias (small-bias) area continuously reduces (increases) when moving from T42 to T266 resolution. Simulations at all three resolutions can capture the key features of the major seasonal variation of rainfall arising from the onset and advancement of the Asian monsoon. A novel method is used to evaluate the sensitivity of the simulated intensity-frequency structure to the horizontal resolution. The proportion of light rain, which demonstrates large positive bias in climate models, decreases dramatically at higher resolution. The intensity-frequency structures averaged over steep-terrain regions and plain areas become more distinctive and realistic as the resolution increases. © 2015. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/76059
Appears in Collections: 影响、适应和脆弱性 气候变化与战略
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作者单位: LaSW, Chinese Academy of Meteorological Sciences, China Meteorological Administration, Beijing, China; LASG, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; Institute of Atmospheric Physics, University of Chinese Academy of Sciences, Beijing, China
Recommended Citation:
Li J,, Yu R,, Yuan W,et al. Precipitation over East Asia simulated by NCAR CAM5 at different horizontal resolutions[J]. Journal of Advances in Modeling Earth Systems,2015-01-01,7(2)