气候变化领域集成服务门户(CCPortal): Variations in surface roughness of heterogeneous surfaces in the Nagqu area of the Tibetan Plateau

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DOI	10.5194/hess-25-2915-2021
	Variations in surface roughness of heterogeneous surfaces in the Nagqu area of the Tibetan Plateau
	Li, Maoshan; Liu, Xiaoran; Shu, Lei; Yin, Shucheng; Wang, Lingzhi; Fu, Wei; Ma, Yaoming; Yang, Yaoxian; Sun, Fanglin
通讯作者	Li, MS (通讯作者)
发表日期	2021
ISSN	1027-5606
EISSN	1607-7938
起始页码	2915
结束页码	2930
卷号	25 期号:5
英文摘要	Temporal and spatial variations of the surface aerodynamic roughness lengths (Z(0m)) in the Nagqu area of the northern Tibetan Plateau were analysed in 2008, 2010 and 2012 using MODIS satellite data and in situ atmospheric turbulence observations. Surface aerodynamic roughness lengths were calculated from turbulent observations by a single-height ultrasonic anemometer and retrieved by the Massman model. The results showed that Z(0m) has an apparent characteristic of seasonal variation. From February to August, Z(0m) increased with snow ablation and vegetation growth, and the maximum value reached 4-5 cm at the BJ site. From September to February, Z(0m) gradually decreased and reached its minimum values of about 1-2 cm. Snowfall in abnormal years was the main reason for the significantly lower Z(0m) compared with that in normal conditions. The underlying surface can be divided into four categories according to the different values of Z(0m): snow and ice, sparse grassland, lush grassland and town. Among them, lush grassland and sparse grassland accounted for 62.49% and 33.74 %, and they have an annual variation of Z(0m) between 1-4 and 2-6 cm, respectively. The two methods were positively correlated, and the retrieved values were lower than the measured results due to the heterogeneity of the underlying surface. These results are substituted into the Noah-MP (multi-parameterisation) model to replace the original parameter design numerical simulation experiment. After replacing the model surface roughness, the sensible heat flux and latent heat flux were simulated with a better diurnal dynamics.
关键词	MODEL PARAMETERIZATION VALIDATION CANOPIES HEIGHT SCHEME LENGTH
语种	英语
WOS研究方向	Geology ; Water Resources
WOS类目	Geosciences, Multidisciplinary ; Water Resources
WOS记录号	WOS:000658337100001
来源期刊	HYDROLOGY AND EARTH SYSTEM SCIENCES
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/260171
推荐引用方式 GB/T 7714	Li, Maoshan,Liu, Xiaoran,Shu, Lei,et al. Variations in surface roughness of heterogeneous surfaces in the Nagqu area of the Tibetan Plateau[J]. 中国科学院青藏高原研究所,2021,25(5).
APA	Li, Maoshan.,Liu, Xiaoran.,Shu, Lei.,Yin, Shucheng.,Wang, Lingzhi.,...&Sun, Fanglin.(2021).Variations in surface roughness of heterogeneous surfaces in the Nagqu area of the Tibetan Plateau.HYDROLOGY AND EARTH SYSTEM SCIENCES,25(5).
MLA	Li, Maoshan,et al."Variations in surface roughness of heterogeneous surfaces in the Nagqu area of the Tibetan Plateau".HYDROLOGY AND EARTH SYSTEM SCIENCES 25.5(2021).