Variability of Soil Moisture and Its Relationship with Surface Albedo and Soil Thermal Parameters over the Loess Plateau

Variability of Soil Moisture and Its Relationship with Surface Albedo and Soil Thermal Parameters over the Loess Plateau

Data from July 2006 to June 2008 observed at SACOL （Semi-Arid Climate and Environment Observatory of Lanzhou University, 35.946°N, 104.137°E, elev. 1961 m）, a semi-arid site in Northwest China, are used to study seasonal variability of soil moisture, along with surface albedo and other soil thermal...

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Bibliographic Details
Published in:Advances in atmospheric sciences Vol. 26; no. 4; pp. 692 - 700
Main Author: 管晓丹 黄建平 郭铌 闭建荣 王国印
Format: Journal Article
Language:English
Published: Heidelberg SP Science Press 01-07-2009
Springer Nature B.V
Key Laboratory for Semi-Arid Climate Change of the Ministry of Education,College of Atmospheric Sciences,Lanzhou University,Lanzhou 730000%Institute of Arid Meteorology,China Meteorological Administration,Lanzhou 730020
Subjects:
Albedo
Arid climates
Atmospheric Sciences
Climate change
Earth and Environmental Science
Earth Sciences
Geophysics/Geodesy
Heat conductivity
Meteorology
Moisture content
Seasonal variations
Semiarid climates
Semiarid environments
Soil conductivity
Soil moisture
Soils
Thermal conductivity
Thermal diffusivity
半干旱气候
土壤水分变化
土壤水分含量
土壤热扩散率
地表反照率
热参数
降水量变化
黄土高原
China, People's Rep., Loess Plateau
China, People's Rep
surface albedo
soil moisture
soil heat capacity
AMSR-E soil moisture product
soil thermal conductivity
soil thermal diffusivity
Loess Plateau
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Summary:Data from July 2006 to June 2008 observed at SACOL （Semi-Arid Climate and Environment Observatory of Lanzhou University, 35.946°N, 104.137°E, elev. 1961 m）, a semi-arid site in Northwest China, are used to study seasonal variability of soil moisture, along with surface albedo and other soil thermal parameters, such as heat capacity, thermal conductivity and thermal diffusivity, and their relationships to soil moisture content. The results indicate that surface albedo decreases with increases in soil moisture content, showing a typical exponential relation between the surface albedo and the soil moisture. The heat capacity, the soil thermal diffusivity, and soil thermal conductivity show large variations between Julian day 90-212 and 450-578. The soil thermal conductivity is found to increase as a power function of soil moisture. Soil heat capacity and soil thermal diffusivity increase with increases in soil moisture. The SACOL observed soil moisture are also used to validate the AMSR-E/AQUA retrieved soil moisture and there is good agreement between them. The analysis of the relationship between satellite retrieved soil moisture and precipitation suggests that the variability of soil moisture depends on the variation of precipitation over the Loess Plateau.
Bibliography:S152.72
soil moisture, surface albedo, soil heat capacity, soil thermal conductivity, soil thermal diffusivity, AMSR-E soil moisture product, Loess Plateau
P407
11-1925/O4
ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0256-1530
1861-9533
DOI:10.1007/s00376-009-8198-0