| 陈辰光,高佳程,买买提艾力·买买提依明,王豫,宋美琪,温聪,艾力亚尔,杨帆,霍文,周成龙.古尔班通古特沙漠土壤物理参数时间变化特征及其影响因子研究[J].沙漠与绿洲气象,2024,18(5):135~145 |
| 古尔班通古特沙漠土壤物理参数时间变化特征及其影响因子研究 |
| Study on temporal variation characteristics and influencing factors of soil physical parameters in Gurbantunggut Desert |
| 投稿时间：2023-05-30 修订日期：2024-04-21 |
| DOI： |
| 中文关键词: 古尔班通古特沙漠 土壤参数 导热率 |
| 英文关键词:Gurbantunggut Desert Soil parameters Thermal conductivity |
| 基金项目:科技创新团队（天山创新团队）项目（2022TSYCTD0007）、沙漠边界层气象及其关键探测技术研究创新团队（）、自治区创新环境建设专项（PT2203）、国家自然科学基金（42375084、42305132 ）、中央级公益性科研院所基本科研业务费专项资金（IDM2021005、IDM2021001） |
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| 中文摘要: |
| 以古尔班通古特沙漠为研究靶区，利用2020年全年克拉美丽陆-气相互作用观测试验站连续观测数据，分析了古尔班通古特沙漠土壤温湿度、土壤热通量、土壤盐分及导热率等主要土壤参数变化特征及影响因子。结果表明：（1）古尔班通古特沙漠土壤温度年日均值变化呈倒“U”型，季节变化特征明显，总体表现为夏季>春季>秋季>冬季，浅层土壤温度的变化幅度大于深层，湿度变化特征为春夏高，秋冬低，通常表现为随土壤深度增加土壤湿度逐渐升高；土壤热通量变化总体表现为春夏高，秋冬低，日变化幅度春夏秋冬依次递减。（2）古尔班通古特沙漠土壤导热率年均值为0.832 W·m-1·K-1，导热率与降水呈显著的正相关，土壤温湿度、土壤盐分是影响沙漠区土壤导热率的主要因子。在冻土条件下，土壤导热率平均为0.634 W·m-1·K-1，且其随土壤湿度增加而增加，冻土时导热随湿度增加的速率约为非冻土时的2.5倍；在降水条件下，土壤含水量小于0.06 m3·m-3时土壤导热率呈现缓慢增加趋势，大于0.06 m3·m-3时随湿度上升而迅速增加；在融雪时期，土壤含水量小于0.11 m3·m-3时土壤导热率随湿度上升缓慢增加，大于0.11 m3·m-3时土壤导热率迅速上升。 |
| 英文摘要: |
| Taking the Gurbantunggut Desert as the research target, the main soil parameters and influencing factors of the Gurbantunggut Desert were analyzed by using the continuous observation data of the Kelameili Land-Air Interaction Observation Experimental Station in 2020. The results showed that: (1) The annual daily mean change of soil temperature in the Gurbantunggut Desert showed an inverted "U" shape, and the seasonal variation characteristics were obvious, which generally showed that the change range of shallow soil temperature was greater than that of deep layer > summer> autumn > winter, and the humidity change was high in spring and summer and low in autumn and winter, which was usually characterized by a gradual increase in soil moisture with the increase of soil depth, and the overall change of soil heat flux was high in spring and summer, low in autumn and winter, and the diurnal variation range decreased in spring, summer, autumn and winter. (2) The average annual thermal conductivity of soil in the Gurbantunggut Desert was 0.832 W·m-1· K-1, the thermal conductivity was significantly positively correlated with precipitation, and soil temperature, humidity and soil salinity were the main factors affecting soil thermal conductivity in desert areas. Under permafrost conditions, the average soil thermal conductivity was 0.634 W·m-1· K-1, and it increases with the increase of soil moisture, the rate of heat conductivity increases with humidity during frozen soil is about 2.5 times that of non-frozen soil, and under precipitation conditions, the soil thermal conductivity increases slowly when the soil moisture content is less than 0.06 m3·m-3, and increases rapidly with the increase of humidity when the soil moisture content is greater than 0.06 m3·m-3, and increases slowly with the increase of humidity when the soil water content is less than 0.11 m3·m-3 during the snowmelt period, and increases rapidly with the increase of humidity when the soil water content is less than 0.11 m3·m-3. |
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