Application of MODIS BRDF/Albedo Dataset in the Regional Temperature Simulation of China

  • 1. Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China;
    2. Department of Geography and Environment, Boston University, Boston, MA 02215, USA

Received date: 2010-09-20

  Revised date: 2011-01-05

  Online published: 2011-03-20

Supported by

China Global Change Research Program, No.2010CB950903; No.2010CB950102; National Natural Science Foundation of China, No.41001122


Surface albedo determines the surface radiation budget directly and causes a local radiation forcing, thus the local temperature (2 m temperature, the same below) could be modified; and then, through atmospheric advection, the temperature of lower reach would be impacted. To study the effects of using MODIS BRDF/Albedo in the regional climate simulation with WRF (Weather Research and Forecasting) model, we carried out two 6-year (2002-2007) simulations on climate of China with WRF model. The Control Run (CT) was forced by surface albedo derived from Static Surface Dataset suggested by WRF model; the MODIS Run (MD) was forced by spectral surface albedo derived from MODIS BRDF/Albedo dataset. The results show the CT run could reproduce the general spatial pattern of temperature with evident biases. In southern Tibetan Plateau, the CT's simulation is lower than observation, with the maximum biases of 1.03oC in autumn; while, in eastern China, the CT's simulation is higher than observation, with the maximum biases of 3.4oC in spring. MD's biases pattern is similar with CT run. However, the MD's cooling biases in southern Tibetan Plateau are larger than CT run, with the maximum biases of 1.32oC; the MD's warming biases in eastern China is lower than CT run, with the maximum biases of 2.97oC. The differences between the CT's biases and MD's biases demonstrate MD's simulation is generally lower than CT's simulation. On the Tibetan Plateau, the lower simulation from MD is attributed to local higher surface albedo. The higher surface albedo causes a less net solar radiation and then a less sense heat from surface to atmosphere bottom; as a consequence, the lower temperature happened. In eastern China, the lower temperature was attributed to colder airflow from north, which is caused by higher albedo and thus cooling effects occur on the Mongolia Plateau.

Cite this article

ZHANG Xuezhen, ZHENG Jingyun, HE Fanneng, WANG Zhuosen . Application of MODIS BRDF/Albedo Dataset in the Regional Temperature Simulation of China[J]. Acta Geographica Sinica, 2011 , 66(3) : 356 -366 . DOI: 10.11821/xb201103008


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