| 摘要: |
| 天山北坡降雪为季节性降雪。【目的】为了对比分析天山北坡不同下垫面积雪特性及其影响因素,为进一步定量化探讨天山北坡融雪产流过程提供理论基础。【方法】通过对融雪期林地、草地、裸地雪特性、气象因子和土壤因子等数据进行实时监测,利用Pearson相关分析方法对比分析气象因子、土壤因子与3种下垫面雪特性间的相关性,以筛选出影响雪特性的重要气象因子和土壤因子。【结果】融雪期林地、草地、裸地平均积雪深度分别为8.06 cm,18.67 cm、16.34 cm；林地积雪层平均雪密度、平均液态含水率均大于草地和裸地,分别为0.48 g.cm-3、0.66%；林地平均积雪层温度(-0.032℃)均小于草地、裸地；融雪期裸地积雪深度与积雪温度、太阳辐射均成显著负相关,其相关系数分别为-0.946,-0.960；草地雪密度与太阳辐射呈显著正相关(r=0.908,p<0.05)；裸地雪密度、液态含水率、积雪层温度与大气温度均呈极显著正相关；融雪期10 cm处的土壤含水率与林地、草地、裸地雪密度均呈显著正相关,20 cm处的土壤含水率与裸地液态含水率呈显著正相关；30 cm处的土壤含水率与草地雪深呈显著负相关,与草地液态含水率呈显著正相关；10 cm处的土壤层温度与裸地雪深呈显著负相关性(r=-0.955,p<0.05)；30 cm处的土壤层温度与草地雪深呈显著负相关,与雪密度呈显著正相关相关。 |
| 关键词: 雪特性；气象因子；土壤温度；土壤含水率；天山北坡 |
| DOI： |
| 分类号:S715 |
| 基金项目:国家“十二五”农村领域国家科技计划课题(2015BAD07B0303)[Foundation:“12th Five-Year”Nationa Science and technology program in rural areas (2015BAD07B0303)] |
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| Analysis of snowmelt characteristics and influencing factors in forest land, grassland and bare land during the snowmelt period on the northern slope of Tianshan Mountain |
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ZHANG Yunyun1,2,3,2, ZHANG Yutao4, LI Jimei4
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1.Institute of Forest Ecology,Xinjiang Academy of Forestry;2.China;3.College of Resources and Environmental Sciences,Xinjiang University;4.Institute of Forest Ecology, Xinjiang Academy of Forestry
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| Abstract: |
| In order to compare and analyze the snow characteristics of different underlying areas and their influencing factors, real-time monitoring of snow-covered woodland, grassland, bare snow characteristics, meteorological factors and soil factors was carried out, and Pearson correlation analysis method was used to compare and analyze meteorological factors and soil factors. Correlation with the snow characteristics of the three underlying surfaces to screen out the important meteorological factors and soil factors affecting the snow characteristics. The results show that the average snow depth of the forest, grassland and bare land during the snowmelt period is 8.06 cm and 18.67 cm,16.34 cm; the average snow density and average liquid water content of the snow cover in the forest are higher than that of the grassland and bare land, respectively 0.48 g.cm -3 and 0.66%; the average snow cover temperature of the forest (-0.032 ° C) is smaller than the grassland and bare The depth of bare snow in the snowmelt period was significantly negatively correlated with the snow temperature and solar radiation, and the correlation coefficients were -0.946, -0.960, respectively; the grass snow density was significantly positively correlated with solar radiation (r=0.908, p< 0.05); bare snow density, liquid water content, snow layer temperature and atmospheric temperature are significantly positively correlated; soil moisture content at 10 cm during snowmelt and forest, grassland, bare land snow There was a significant positive correlation between the soil moisture content at 20 cm and the liquid water content at bare soil. The soil moisture content at 30 cm is significantly negatively correlated with the snow depth of the grassland, and was significantly positively correlated with the liquid water content of the grassland. The soil layer temperature at 10 cm was significantly negatively correlate with bare snow depth (r=-0.955, p<0.05); the soil layer temperature at 30 cm is significantly negatively correlated with the snow depth of the grassland, and is significantly correlated with snow density. Positive correlation. The research results provide a theoretical basis for further quantitative exploration of the process of melting snow production. |
| Key words: snow characteristics; meteorological factors; soil temperature; soil moisture content ; northern slope of Tianshan |
