CAJ | 학술논문

利用陆面过程模式（CLM3.5）和中国区域两种土壤质地数据（分别来自第二次中国土壤调查SNSS和联合国粮食农业组织 FAO），研究了土壤质地变化对于模式模拟的陆表水热变量的影响。结果显示，土壤质地对土壤水文学变量的影响远大于对土壤热力学变量的影响，尤其是对于饱和土壤含水量和饱和水力传导率的影响。对于模式的输出，土壤质地影响比较明显的有土壤湿度、总径流和土壤渗透等水文学变量以及地表潜热、地表感热和土壤热通量等热力学变量，而影响相对较小的有地面吸收的太阳辐射和地表反照率。同时，发现基于SNSS模拟的土壤湿度与站点观测值更加接近。因此，本研究认为基于SNSS土壤质地数据可以有效地改进模式模拟结果，建议以后在陆面模式试验中尽可能使用以观测为基础的SNSS土壤质地数据。
이용륙면과정모식（CLM3.5）화중국구역량충토양질지수거（분별래자제이차중국토양조사SNSS화연합국양식농업조직 FAO），연구료토양질지변화대우모식모의적륙표수열변량적영향。결과현시，토양질지대토양수문학변량적영향원대우대토양열역학변량적영향，우기시대우포화토양함수량화포화수력전도솔적영향。대우모식적수출，토양질지영향비교명현적유토양습도、총경류화토양삼투등수문학변량이급지표잠열、지표감열화토양열통량등열역학변량，이영향상대교소적유지면흡수적태양복사화지표반조솔。동시，발현기우SNSS모의적토양습도여참점관측치경가접근。인차，본연구인위기우SNSS토양질지수거가이유효지개진모식모의결과，건의이후재륙면모식시험중진가능사용이관측위기출적SNSS토양질지수거。
On the basis of Community Land Model version 3.5 (CLM3.5) and two soil texture datasets such as the Second National Soil Survey of China (SNSS) and the Food and Agriculture Organization of the United Nations (FAO), this study investigates the impacts of soil texture on the simulation of land surface processes in China. By analyzing soil hydrological and thermal properties derived from soil texture, it is determined that soil texture plays a more important role on the soil hydrological characteristics, such as saturated soil moisture and saturated hydraulic conductivity, than that on its thermal properties. Model outputs show that soil texture has a significant impact on soil moisture, runoff, infiltration, surface latent heat, sensible heat, and heat flux, while little impact on absorbed solar radiation and albedo. Moreover, it is shown that soil moisture values are closer to the observations when simulated by CLM3.5 with SNSS than those simulated with FAO. Therefore, to improve the performance of the land surface model, particularly for soil hydrology, this study suggests the use of observation-based soil texture datasets, such as those of SNSS, in the future.