Offline experiment of land surface processes in Qinghai-Xizang Plateau
Tóm tắt
The observational data of Beiluhe test of the Qinghai-Xizang railway in June 2002 are used as forcing field of the surface model to study the simulation performance in Qinghai-Xizang Plateau. The simulation result shows that the model (NCAR/LSM) can present the surface character tendency reasonably under observation forcing. In NCAR/LSM, the descriptions of the surface vegetation type in Qinghai-Xizang Plateau have much difference to what is actually happening. According to the actual characteristic of the surface, we define the grassland vegetation coverage rate is 0.6, and the vegetation canopy is 0.15 m, and the displacement height is 0.10 m. Compared the results with the old model’s parameter in experiment, we find that the simulation air (2 m) temperature and the ground temperature are close to those of the observation, and the simulation temperature of peak value is better, and the simulation flux of the ground is sure to be improved too. So, if the surface and vegetation parameters are revised in LSM model, the simulation capability of the land surface process model can be improved effec-tively in Qinghai-Xizang Plateau.
Tài liệu tham khảo
Dickinson, R. E., Land-atmosphere interaction, Reviews of Geophysics, 1995, 33: 917–922.
Chen, W. L., Wang, G. L., Zhou, S. Q., Numerical modeling for effect of vegetative distribution on heavy rain processes occurred in east Qinghai-Tibetan Plateau, Plateau Meteorology, 1997, 16(2): 165–173.
Zhou, S. Q., Chen, W. L., Numerical experiments with effect of Tibetan vegetation on east Asian atmospheric circulations, Journal ofNanjing Institute of Meteorology, 1995, 18(4): 536–542.
Sun, S. F., Jin, J. M., Some problems on the study of land surface process model, Quarterly Journal of Applied Meteorology, 1997, 8(1): 50–57.
Boman, G. The land surface climatology of the NCAR land surface model coupled to the NCAR community climate model, Journal of Climate, 1998, 11(6): 1307–1326.
Zhang, Y., Lu, S. H., An experiment on the Northern Qing- hai-Xizang Plateau land surface model, Chinese Journal of Atmospheric Sciences, 2002, 26(3): 387–393.
Wang, C. H., Dong, W. J., Wei, Z. G. et al., The simulation and analysis of land surface processes on the typical arid area, Plateau Meteorology, 2002, 21(5): 466–472.
Boman, G. A land surface model (LSM version 1.0) for ecological, hydrological, and atmospheric studies: Technical description and user’s guide, NCAR Tech Note NCAR/TN417+STR, 1996, 1–150.
Zhang, Y., Lu, S. H., The sensitivity of land surface model to physical properties of different soils, Journal of Glaciology and Geocryology, 2001, 23(3): 270–275.