干旱区生态环境知识资源中心(Arid): Effects of Optimized Root Water Uptake Parameterization Schemes on Water and Heat Flux Simulation in a Maize Agroecosystem

Arid

	Effects of Optimized Root Water Uptake Parameterization Schemes on Water and Heat Flux Simulation in a Maize Agroecosystem
	Cai Fu; Ming Huiqing; Mi Na; Xie Yanbing; Zhang Yushu; Li Rongping
来源期刊	Journal of Meteorological Research
ISSN	2095-6037
出版年	2017
卷号	31 期号:2 页码:363-377
英文摘要	As root water uptake (RWU) is an important link in the water and heat exchange between plants and ambient air, improving its parameterization is key to enhancing the performance of land surface model simulations. Although different types of RWU functions have been adopted in land surface models, there is no evidence as to which scheme most applicable to maize farmland ecosystems. Based on the 2007-09 data collected at the farmland ecosystem field station in Jinzhou, the RWU function in the Common Land Model (CoLM) was optimized with scheme options in light of factors determining whether roots absorb water from a certain soil layer (W_x) and whether the baseline cumulative root efficiency required for maximum plant transpiration (W_c) is reached. The sensibility of the parameters of the optimization scheme was investigated, and then the effects of the optimized RWU function on water and heat flux simulation were evaluated. The results indicate that the model simulation was not sensitive to W_x but was significantly impacted by W_c. With the original model, soil humidity was somewhat underestimated for precipitation-free days; soil temperature was simulated with obvious interannual and seasonal differences and remarkable underestimations for the maize late-growth stage; and sensible and latent heat fluxes were overestimated and underestimated, respectively, for years with relatively less precipitation, and both were simulated with high accuracy for years with relatively more precipitation. The optimized RWU process resulted in a significant improvement of CoLMs performance in simulating soil humidity, temperature, sensible heat, and latent heat, for dry years. In conclusion, the optimized RWU scheme available for the CoLM model is applicable to the simulation of water and heat flux for maize farmland ecosystems in arid areas.
英文关键词	root water uptake land surface model water flux heat flux maize agroecosystem
类型	Article
语种	英语
开放获取类型	Other Gold
收录类别	CSCD
WOS研究方向	Agriculture
CSCD记录号	CSCD:5993527
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335809
作者单位	Cai Fu, Institute of Atmospheric Environment, China Meteorological Administration, Shenyang, Liaoning 110166, China.; Mi Na, Institute of Atmospheric Environment, China Meteorological Administration, Shenyang, Liaoning 110166, China.; Xie Yanbing, Institute of Atmospheric Environment, China Meteorological Administration, Shenyang, Liaoning 110166, China.; Zhang Yushu, Institute of Atmospheric Environment, China Meteorological Administration, Shenyang, Liaoning 110166, China.; Ming Huiqing, Liaoning Province Meteorological Service Center, Shenyang, Liaoning 110166, China.; Li Rongping, Institute of Meteorological Science of Liaoning Province, Shenyang, Liaoning 110166, China.
推荐引用方式 GB/T 7714	Cai Fu,Ming Huiqing,Mi Na,et al. Effects of Optimized Root Water Uptake Parameterization Schemes on Water and Heat Flux Simulation in a Maize Agroecosystem[J],2017,31(2):363-377.
APA	Cai Fu,Ming Huiqing,Mi Na,Xie Yanbing,Zhang Yushu,&Li Rongping.(2017).Effects of Optimized Root Water Uptake Parameterization Schemes on Water and Heat Flux Simulation in a Maize Agroecosystem.Journal of Meteorological Research,31(2),363-377.
MLA	Cai Fu,et al."Effects of Optimized Root Water Uptake Parameterization Schemes on Water and Heat Flux Simulation in a Maize Agroecosystem".Journal of Meteorological Research 31.2(2017):363-377.