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	Simulation and improvement of land surface processes in nameqie, central tibetan plateau, using the community land model (clm3.5)
	Wang, Xuejia1,2; Yang, Meixue1; Pang, Guojin3; Wan, Guoning1; Chen, Xiaolei2,4
刊名	Environmental earth sciences
	2015-06-01
卷号	73期号:11页码:7343-7357
关键词	Community land model Land surface process Soil thermal conductivity Soil temperature Freeze/thaw Soil volumetric water content
ISSN号	1866-6280
DOI	10.1007/s12665-014-3911-4
通讯作者	Yang, meixue(mxyang@lzb.ac.cn)
英文摘要	Accurate simulation of thermal and hydrological soil processes is highly important for studying cold region climates. in this paper, two thermal conductivity parameterization schemes for soil proposed by johansen and luo were combined with a groundwater parameterization scheme (jn and ln schemes) to modify the soil water and heat parameterization schemes in the community land model (clm3.5). land surface processes in the central tibetan plateau were simulated based on the original scheme (farouki scheme), jn scheme, and ln scheme using the atmospheric forces from meteorological observations at nameqie, and they were compared with observed data in the same period. we found that all three schemes underestimated the upward shortwave radiation and overestimated the upward longwave radiation and net radiation, but the predictions from the modified scheme better agreed with the observations. the three schemes simulated the average soil temperatures higher than the observation data. the modified schemes, particularly the ln scheme, resulted in better predictions of the soil temperature compared with the original clm3.5. more thawing days were simulated by three schemes. the observed freezing and thawing proceeded from the upper layers to the lower layers; however, the frozen soil in the farouki and ln schemes began to thaw in the upper layers and below 160 cm. the differences in the simulated soil thermal conductivity among the three schemes increased with depth. the soil thermal conductivity simulated by the farouki scheme was the highest, while the smallest values were generated by the jn scheme. the soil volumetric water content of the farouki scheme below a 100 cm depth was obviously larger than the observed data. after considering water exchange between the soil column and its underlying aquifer, the jn scheme and, particularly, the ln scheme, simulated the soil volumetric water content slightly higher than but similarly to the observed data.
WOS关键词	FROZEN SOIL PARAMETERIZATION ; THERMAL-CONDUCTIVITY PARAMETERIZATION ; CLIMATE MODEL ; CONTINENTAL-SCALE ; SCHEME ; MOISTURE ; VALIDATION ; PERMAFROST ; ATMOSPHERE ; DYNAMICS
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Water Resources
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Water Resources
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000354712300049
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2376550
专题	中国科学院大学
通讯作者	Yang, Meixue
作者单位	1.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, State Key Lab Cryospher Sci, Lanzhou 730000, Gansu, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Lab Remote Sensing & Geospatial Sci, Lanzhou 730000, Gansu, Peoples R China 4.Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Numer Modeling Atmospher Sci & Geop, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Wang, Xuejia,Yang, Meixue,Pang, Guojin,et al. Simulation and improvement of land surface processes in nameqie, central tibetan plateau, using the community land model (clm3.5)[J]. Environmental earth sciences,2015,73(11):7343-7357.
APA	Wang, Xuejia,Yang, Meixue,Pang, Guojin,Wan, Guoning,&Chen, Xiaolei.(2015).Simulation and improvement of land surface processes in nameqie, central tibetan plateau, using the community land model (clm3.5).Environmental earth sciences,73(11),7343-7357.
MLA	Wang, Xuejia,et al."Simulation and improvement of land surface processes in nameqie, central tibetan plateau, using the community land model (clm3.5)".Environmental earth sciences 73.11(2015):7343-7357.

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