干旱区生态环境知识资源中心(Arid): CLM4.0模式对干旱区荒漠草原过渡带快速变化陆面过程的数值模拟研究

Arid

	CLM4.0模式对干旱区荒漠草原过渡带快速变化陆面过程的数值模拟研究
其他题名	Numerical Simulation of Transient Land Surface Process over Desert-Steppe Transitional Zone in Arid Areas Using Community Land Model
	杨扬 1; 左洪超 2; 杨启东 3; 杜冰 2; 王晓霞 2; 王明星 2; 武建军 2
来源期刊	高原气象
ISSN	1000-0534
出版年	2015
卷号	34 期号:4 页码:923-934
中文摘要	利用2012年7- 9月微气象蒸发观测实验的观测资料和陆面模式CLM4.0,对荒漠草原过渡带快速变化的陆面过程进行了单点数值模拟试验,通过比较模拟值与观测值来检验模式的模拟能力。结果表明:(1) CLM4.0模式能较好地模拟下垫面快速变化的辐射通量、湍流通量、土壤温度及土壤含水量的变化特征,但模拟值较观测值还存在一定偏差。在干旱及湿润地表状况下,CLM4.0模式模拟的反射辐射与观测值的偏差较小,而草地地表时模拟值较观测值偏高;CLM4.0模式较好地模拟了地表长波辐射的变化趋势,但是在正午和夜间偏差较大。(2) CLM4.0模式模拟的湍流通量与观测值之间的相关系数达0.85以上,但模拟值较观测值偏高。(3) CLM4.0模式模拟的土壤温度及含水量较观测值偏小,且对强降水引起的土壤含水量的变化过程的模拟性能较差。发展适用于干旱荒漠草原过渡带的土壤孔隙度参数化方案,进而通过改善土壤热导率、导水率的模拟有助于提高该类下垫面土壤温度及土壤含水量的模拟性能。
英文摘要	To study the transient change of desert-steppe transitional zone,a single point simulation experiment has been done by using the Community Land Model version 4.0 of NCAR(CLM4.0) and the observed data of Microclimate and Evaporation Experiment during July to September 2012. The simulation capability of the model was test by comparing the simulated values with the observed ones. The results showed that: (1) The results showed that: CLM4.0 model can successfully simulate the variation of the surface radiation,turbulent fluxes, soil temperature and water content with the transient changes over the underlying surface,while there are deviations between the two. In the dry and moist surface conditions, deviations between simulated and observed values of the reflected radiation is small,while the grass surface model simulations higher value compared to the observed values ; CLM4.0 simulate the trend of surface longwave radiation, but deviations exist on noon and night. (2) The correlation coefficient between the simulated turbulent fluxes and observed values reached above 0.85,but the simulated values are higher than the observed values. (3) The simulated soil temperature and water content are smaller than the observed values. The CLM4.0 has a poor performance of the simulated soil moisture changes caused by heavy precipitation process. Developing applicable soil porosity parameterization schemes over the arid desert-steppe transitional zone, improving soil thermal and hydraulic conductivity simulation can help to improve simulation performance of soil temperature and water content over such underlying surface.
中文关键词	荒漠草原过渡带 ; 快速变化 ; 陆面过程 ; CLM4.0模式
英文关键词	Desert-steppe transitional zone Transient change Land surface process CLM4.0 model
语种	中文
国家	中国
收录类别	CSCD
WOS类目	METEOROLOGY ATMOSPHERIC SCIENCES
WOS研究方向	Meteorology & Atmospheric Sciences
CSCD记录号	CSCD:5509409
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/232833
作者单位	1.兰州大学大气科学学院, 甘肃省(中国气象局)干旱气候变化与减灾重点实验室, 兰州, 甘肃 730000, 中国; 2.兰州大学大气科学学院, 兰州, 甘肃 730000, 中国; 3.云南大学大气科学系, 昆明, 云南 650091, 中国
推荐引用方式 GB/T 7714	杨扬,左洪超,杨启东,等. CLM4.0模式对干旱区荒漠草原过渡带快速变化陆面过程的数值模拟研究[J]. 兰州大学,2015,34(4):923-934.
APA	杨扬.,左洪超.,杨启东.,杜冰.,王晓霞.,...&武建军.(2015).CLM4.0模式对干旱区荒漠草原过渡带快速变化陆面过程的数值模拟研究.高原气象,34(4),923-934.
MLA	杨扬,et al."CLM4.0模式对干旱区荒漠草原过渡带快速变化陆面过程的数值模拟研究".高原气象 34.4(2015):923-934.