DOI: 10.1007/s00382-016-3208-2
Scopus记录号: 2-s2.0-85016272097
论文题名: Impact of spectral nudging on regional climate simulation over CORDEX East Asia using WRF
作者: Tang J. ; Wang S. ; Niu X. ; Hui P. ; Zong P. ; Wang X.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2017
卷: 48, 期: 2017-07-08 起始页码: 2339
结束页码: 2357
语种: 英语
英文关键词: CORDEX East Asia
; Regional climate simulation
; Spectral nudging
; Validation
英文摘要: In this study, the impact of the spectral nudging method on regional climate simulation over the Coordinated Regional Climate Downscaling Experiment East Asia (CORDEX-EA) region is investigated using the Weather Research and Forecasting model (WRF). Driven by the ERA-Interim reanalysis, five continuous simulations covering 1989–2007 are conducted by the WRF model, in which four runs adopt the interior spectral nudging with different wavenumbers, nudging variables and nudging coefficients. Model validation shows that WRF has the ability to simulate spatial distributions and temporal variations of the surface climate (air temperature and precipitation) over CORDEX-EA domain. Comparably the spectral nudging technique is effective in improving the model’s skill in the following aspects: (1), the simulated biases and root mean square errors of annual mean temperature and precipitation are obviously reduced. The SN3-UVT (spectral nudging with wavenumber 3 in both zonal and meridional directions applied to U, V and T) and SN6 (spectral nudging with wavenumber 6 in both zonal and meridional directions applied to U and V) experiments give the best simulations for temperature and precipitation respectively. The inter-annual and seasonal variances produced by the SN experiments are also closer to the ERA-Interim observation. (2), the application of spectral nudging in WRF is helpful for simulating the extreme temperature and precipitation, and the SN3-UVT simulation shows a clear advantage over the other simulations in depicting both the spatial distributions and inter-annual variances of temperature and precipitation extremes. With the spectral nudging, WRF is able to preserve the variability in the large scale climate information, and therefore adjust the temperature and precipitation variabilities toward the observation. © 2016, Springer-Verlag Berlin Heidelberg. 资助项目: NSFC, National Natural Science Foundation of China
; NSFC, National Natural Science Foundation of China
; NSFC, National Natural Science Foundation of China
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/53293
Appears in Collections: 过去全球变化的重建
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作者单位: School of Atmospheric Sciences, Nanjing University, 163 Xianlin Road, Nanjing, China; Institute for Climate and Global Change Research, Nanjing University, Nanjing, China; Jiangsu Climate Center, Nanjing, China; Jiangsu Meteorological Observatory, Nanjing, China
Recommended Citation:
Tang J.,Wang S.,Niu X.,et al. Impact of spectral nudging on regional climate simulation over CORDEX East Asia using WRF[J]. Climate Dynamics,2017-01-01,48(2017-07-08)