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利用那曲地区NMQ站2010年11月1日至2011年7月26日的观测资料作为通用陆面过程模式CLM3.0和水热耦合模式SHAW的大气强迫,在青藏高原中部季节冻土区进行了单点模拟研究.在参照观测资料的基础上,对两个陆面模式的模拟结果对比发现:SHAW模式和CLM3.0模式模拟的向上短波辐射和向下长波辐射值基本相近或重合,但两个模式均未考虑新雪存在对向上短波辐射的影响,以及青藏高原日冻融循环过程中潜热释放对向上长波辐射的影响.此外,SHAW模式和CLM3.0模式均能模拟各层土壤温度的逐日变化,均是上层土壤的模拟效果较下层好;相比SHAW模式,CLM3.0各层土壤温度的模拟值更接近于实测值.对土壤含水量的模拟而言,60cm以上(包括60cm)SHAW模式和CLM3.0模式各有其优缺点,60cm以下SHAW模式的模拟结果要好于CLM3.0,尤其是土壤冻结和消融时段的模拟结果.
Based on the observation data of NMQ station in Nagqu region from November 1, 2010 to July 26, 2011, the atmospheric compulsion of general land-surface process model CLM3.0 and hydrothermal coupling model SHAW was carried out in the central permafrost region of the Qinghai-Tibet Plateau Based on the observed data, the simulation results of two land surface modes show that the SHW mode and the CLM3.0 mode simulate upward shortwave radiation and downward longwave radiation are basically similar or coincident, but two All the models did not consider the influence of fresh snow on upward shortwave radiation and the effect of latent heat release on the upward longwave radiation during the freeze-thaw cycles of Qinghai-Tibet Plateau. In addition, SHAW mode and CLM3.0 mode can simulate the soil temperature Compared with the SHAW model, the simulation values of soil temperature in CLM3.0 layers are closer to the measured values. For the simulation of soil moisture content, SHAW (including 60cm) SHAW Both the CLM3.0 and CLM3.0 modes have their own advantages and disadvantages. The results of the SHAW model below 60 cm are better than those of the CLM3.0, especially the soil freezing and thawing periods.