Considering the effect of gravel(particle size≥2 mm)on the land surface process, using the measured data of the Maduo site on the Qinghai-Tibetan Plateau (QTP) to test the influence of the surface model gravel parameterization scheme on thermal and hydrological processes in soil containing gravel.The new scheme was implemented in the BCC_AVIM land surface process model of the National Climate Center.The results show that the gravel changes the composition of the soil texture, resulting the changes in the basic parameters of soil thermal and soil hydrological.So the soil hydraulic conductivity and soil thermal conductivity are affected.In the end, the simulation of soil temperature and humidity changes.Using the measured data of Maduo station, comparing the original and new scheme, it is found that the new scheme reduces the simulated values of soil temperature and soil water content, reduces the absolute deviation and root mean square error of the simulation results, and increases the correlation between soil temperature and soil moisture simulation.The coefficient improves the performance of the original model soil thermal and hydrological simulation, especially the simulation effect of deep soil water content.At the same time, the new scheme reduces the simulation of ice content in shallow soils, increases the simulation of ice content in deep soils, and increases the simulation of snow cover and snow depth.
Cuili MA
,
Shihua Lü
,
Yongjie PAN
,
Shaobo ZHANG
,
Zhaoguo LI
,
Chuang YAO
. Application and Test of Land Surface Model Gravel Parameterization in BCC_AVIM Land Surface Model[J]. Plateau Meteorology, 2020
, 39(6)
: 1232
-1245
.
DOI: 10.7522/j.issn.1000-0534.2019.00129
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