CoLM陆面模式对中亚干旱荒漠草地生态系统陆面过程的数值模拟

发布时间：2018-07-09 10:42

本文选题：干旱区 + 荒漠草地　；参考：《草业学报》2017年03期

【摘要】：鉴于陆面模式在干旱半干旱区模拟性能较差,本研究运用Common Land Model(CoLM)陆面模式对中亚干旱荒漠草地生态系统进行了站点验证,检验其在该区域的模拟性能,并分析了其陆面特征。结果表明,不同水分状况的草地生态系统在能量分配上表现出明显的差异性,干旱特征明显的阜康站和咸海站能量分配表现为以感热通量为主;水分状况较好的巴尔喀什湖站能量分配以潜热通量为主。CoLM陆面模式对典型干旱荒漠草地生态系统的陆面过程有较好的模拟性能,能正确描述能量通量的日变化特征。模型对研究站点夜晚感热通量、土壤热通量的模拟效果不太理想,夜间感热通量模拟值略高于观测值,土壤热通量模拟明显低于观测值,在3个研究站点土壤热通量偏差均大于50 W/m~2,不能很好地描述昼夜温差较大的干旱区夜间较强的土壤热通量交换过程。
[Abstract]:In view of the poor simulation performance of the land surface model in arid and semi-arid regions, the Common Land Model (Colm) land surface model was used to verify the arid desert grassland ecosystem in Central Asia, to test its simulation performance in this region and to analyze its land surface characteristics. The results showed that there were obvious differences in energy distribution among grassland ecosystems with different water conditions, and the main energy distribution in Fukang station and Aral Sea station was sensible heat flux. In Balkesh Lake Station where the water condition is good, the latent heat flux is the main energy distribution. Colm land surface model can simulate the land surface process of typical arid desert grassland ecosystem, and can accurately describe the diurnal variation characteristics of energy flux. The simulation effect of the model on the nocturnal sensible heat flux and soil heat flux is not satisfactory. The simulated value of nocturnal sensible heat flux is slightly higher than the observed value, and the simulation of soil heat flux is obviously lower than the observed value. The deviation of soil heat flux was more than 50 W / m ~ (2) at three sites, which could not describe the process of soil heat flux exchange at night in arid areas with large diurnal temperature difference.
【作者单位】：新疆农业大学草业与环境科学学院新疆草地资源与生态重点实验室;
【基金】：国家自然科学基金项目(41561021) 中国博士后科学基金第60批面上资助(2016M602952XB) 新疆农业大学博士后流动站资助
【分类号】：S812

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