气候变化领域集成服务门户(CCPortal): Implementing Dynamic Rooting Depth for Improved Simulation of Soil Moisture and Land Surface Feedbacks in Noah-MP-Crop

CCPortal

DOI	10.1029/2019MS001786
	Implementing Dynamic Rooting Depth for Improved Simulation of Soil Moisture and Land Surface Feedbacks in Noah-MP-Crop
	Liu X.; Chen F.; Barlage M.; Niyogi D.
发表日期	2020
ISSN	19422466
卷号	12 期号:2
英文摘要	The study postulates that crop rooting depth representation plays a vital role in simulating soil-crop-atmospheric interactions. Rooting depth determines the water access for plants and alters the surface energy participation and soil moisture profile. The aboveground crop growth representation in land surface models continues to evolve and improve, but the root processes are still poorly represented. This limitation likely contributes to the bias in simulating soil-crop-related variables such as soil moisture and associated water and energy exchanges between the surface and the atmosphere. In Noah-MP-Crop, the rooting depth of crops is assumed as 1 m regardless of crop types and the length of growing seasons. In this study, a simple dynamic rooting depth formulation was integrated into Noah-MP-Crop. On comparing with soil moisture observations from the in situ Ameriflux, USDA Soil Climate Analysis Network, and the remote-sensed Soil Moisture Active Passive data set, the results highlight the improved performance of Noah-MP-Crop due to modified rooting depth. The improvements were noted in terms of soil moisture and more prominently in terms of the energy flux simulations at both field scale and regional scale. The enhancements in soil moisture profiles reduce the biases in surface heat flux simulations. The impact of rooting depth representation appears to be particularly significant for improving model performance under drought-like situations. Although it was not possible to validate the simulated rooting depth due to lack of observations, the overall performance of the model helps emphasize the importance of enhancing the representation of crop rooting depth in Noah-MP-Crop. ©2020. The Authors.
英文关键词	crop modelling; land surface interaction; land surface model; root zone soil moisture; rooting depth; soil moisture
语种	英语
scopus关键词	Crops; Heat flux; Plants (botany); Remote sensing; Soil moisture; Surface measurement; Active-passive data; Atmospheric interaction; Land surface; Land surface modeling; Root zone soil moistures; Rooting depths; Soil moisture profiles; Surface heat fluxes; Soil surveys; agricultural modeling; data set; energy flux; growth; model; satellite data; simulation; soil moisture
来源期刊	Journal of Advances in Modeling Earth Systems
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/156756
作者单位	Department of Agronomy, Purdue University, West Lafayette, IN, United States; National Center for Atmospheric Research, Boulder, CO, United States; Department of Earth, Atmospheric, and Planetary Sciences, Purdue University, West Lafayette, IN, United States
推荐引用方式 GB/T 7714	Liu X.,Chen F.,Barlage M.,et al. Implementing Dynamic Rooting Depth for Improved Simulation of Soil Moisture and Land Surface Feedbacks in Noah-MP-Crop[J],2020,12(2).
APA	Liu X.,Chen F.,Barlage M.,&Niyogi D..(2020).Implementing Dynamic Rooting Depth for Improved Simulation of Soil Moisture and Land Surface Feedbacks in Noah-MP-Crop.Journal of Advances in Modeling Earth Systems,12(2).
MLA	Liu X.,et al."Implementing Dynamic Rooting Depth for Improved Simulation of Soil Moisture and Land Surface Feedbacks in Noah-MP-Crop".Journal of Advances in Modeling Earth Systems 12.2(2020).