Estimation of Soil Heat Flux over the Northern Tibetan Plateau based on in-situ Soil Temperature and Moisture Data

FENG Lu; ZHONG Lei; MA Yaoming; FU Yunfei; ZOU Mijun

doi:10.7522/j.issn.1000-0534.2015.00006

Plateau Meteorology >

2016 , Vol. 35 >Issue 2: 297 - 308

DOI: https://doi.org/10.7522/j.issn.1000-0534.2015.00006

Estimation of Soil Heat Flux over the Northern Tibetan Plateau based on in-situ Soil Temperature and Moisture Data

FENG Lu ,
ZHONG Lei ,
MA Yaoming ,
FU Yunfei ,
ZOU Mijun

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Key Laboratory of Atmospheric Composition and Optical Radiation, Chinese Academy of Science/School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China;2. Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China;3. CAS Center for Excellence in Tibetan Plateau Earth Sciences, Beijing 100101, China

Received date: 2014-11-20

Online published: 2016-04-28

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Abstract

In order to estimate and analyze soil heat flux over the Northern Tibetan Plateau, this study adopts a temperature prediction-correction(TDEC) method based on in-situ soil temperature and moisture data (from 8 June to 30 July 2004) from the Coordinated Enhanced Observing Period (CEOP) Asia-Australia Monsoon Project on the Tibetan Plateau(CAMP/Tibet). The comparison between in-situ soil heat flux and estimated values from TDEC shows that they have the same heat flux flow direction and phase. A positive linear relationship(R²>0.74) can also been found between them, but the in-situ values by heat flux plate is generally smaller than estimation. Both cloud and precipitation can influence the fluctuation of soil heat flux, especially in the surface soil. A good linear relationship(R²>0.78)exists between ground heat flux calculated by the TDEC method and the net radiation flux. The higher soil thermal conductivity, the faster diurnal variation rate of soil heat flux estimated by the TDEC method. For homogeneous sandy loam soil, the diurnal variation amplitude of soil heat flux is very large, indicating the vertical heat exchanged is very strong.

Key words： Northern Tibetan Pla; Soil temperature and; Soil heat flux; Temperature predicti

Cite this article

FENG Lu , ZHONG Lei , MA Yaoming , FU Yunfei , ZOU Mijun . Estimation of Soil Heat Flux over the Northern Tibetan Plateau based on in-situ Soil Temperature and Moisture Data[J]. Plateau Meteorology, 2016 , 35(2) : 297 -308 . DOI: 10.7522/j.issn.1000-0534.2015.00006

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