Numerical simulation and data assimilation of the water-energy cycle over semiarid northeastern China (SCI)

CORC > 寒区旱区环境与工程研究所 > 中科院寒区旱区环境与工程研究所（未分类） > 期刊论文

	Numerical simulation and data assimilation of the water-energy cycle over semiarid northeastern China (SCI)
	Wen X. H. ; Liao X. H. ; Yuan W. P. ; Yan X. D. ; Wei Z. G. ; Liu H. Z. ; Feng J. M. ; Lu S. H. ; Dong W. J.
刊名	Science China-Earth Sciences
	2014
卷号	57 期号:10 页码:2340-2356
英文摘要	The default fractional vegetation cover and terrain height were replaced by the estimated fractional vegetation cover, which was calculated by the Normalized Difference Vegetation Index (NDVI) of Earth Observing System Moderate-Resolution Imaging Spectroradiometer (EOS-MODIS) and the Digital Elevation Model of the Shuttle Radar Topography Mission (SRTM) system. The near-surface meteorological elements over northeastern China were assimilated into the three-dimensional variational data assimilation system (3DVar) module in the Weather Research and Forecasting (WRF) model. The structure and daily variations of air temperature, humidity, wind and energy fields over northeastern China were simulated using the WRF model. Four groups of numerical experiments were performed, and the simulation results were analyzed of latent heat flux, sensible heat flux, and their relationships with changes in the surface energy flux due to soil moisture and precipitation over different surfaces. The simulations were compared with observations of the stations Tongyu, Naiman, Jinzhou, and Miyun from June to August, 2009. The results showed that the WRF model achieves high-quality simulations of the diurnal characteristics of the surface layer temperature, wind direction, net radiation, sensible heat flux, and latent heat flux over semiarid northeastern China in the summer. The simulated near-surface temperature, relative humidity, and wind speed were improved in the data assimilation case (Case 2) compared with control case (Case 1). The simulated sensible heat fluxes and surface heat fluxes were improved by the land surface parameterization case (Case 3) and the combined case (Case 4). The simulated temporal variations in soil moisture over the northeastern arid areas agree well with observations in Case 4, but the simulated precipitation should be improved in the WRF model. This study could improve the land surface parameters by utilizing remote sensing data and could further improve atmospheric elements with a data assimilation system. This work provides an effective attempt at combining multi-source data with different spatial and temporal scales into numerical simulations. The assimilation datasets generated by this work can be applied to research on climate change and environmental monitoring of arid lands, as well as research on the formation and stability of climate over semiarid areas.
收录类别	SCI
公开日期	2015-12-24
内容类型	期刊论文
源URL	[http://ir.casnw.net/handle/362004/24812]
专题	寒区旱区环境与工程研究所_中科院寒区旱区环境与工程研究所（未分类）_期刊论文
推荐引用方式 GB/T 7714	Wen X. H.,Liao X. H.,Yuan W. P.,et al. Numerical simulation and data assimilation of the water-energy cycle over semiarid northeastern China (SCI)[J]. Science China-Earth Sciences,2014,57(10):2340-2356.
APA	Wen X. H..,Liao X. H..,Yuan W. P..,Yan X. D..,Wei Z. G..,...&Dong W. J..(2014).Numerical simulation and data assimilation of the water-energy cycle over semiarid northeastern China (SCI).Science China-Earth Sciences,57(10),2340-2356.
MLA	Wen X. H.,et al."Numerical simulation and data assimilation of the water-energy cycle over semiarid northeastern China (SCI)".Science China-Earth Sciences 57.10(2014):2340-2356.