羌塘高原核心区2013-2014年土壤温度变化特征

发布时间：2018-03-02 05:27

本文关键词： 羌塘高原土壤温度冻结消融过程水热交换青藏高原　出处：《地理研究》2017年11期 　论文类型：期刊论文

【摘要】：基于羌塘高原核心区布设的19套土壤温湿度仪器和3个自动气象站2013年9月-2014年10月间的监测数据,分析羌塘高原核心区不同站点在1 cm、10 cm、20 cm深度处的土壤温度日变化和季节变化特征。结果表明:(1)研究时段内站点1 cm、10 cm、20 cm深度土壤的日均温在-16.27~17.18℃之间波动,随着土壤深度的增加,温度变幅逐渐减小。(2)站点间的日均温差最大不超过12.82℃,主要受海拔与纬度的影响。昼夜变化呈现升温快,降温慢的特征。(3)不同深度的土壤平均最冷月均温为-12.69℃,最暖月均温为13.15℃,土壤日平均温度的年际变幅在30℃左右。在土壤冻结/消融过程中土壤温度的变异系数很高,表层更加明显,且消融过程变异性比冻结过程更强。(4)在月尺度上土壤1 cm日平均温度与气温的相关性最强,可达到0.99以上。研究将有助于填补该地区土壤温度数据的空白,对认识该区域冰冻、消融交替过程中土壤热量迁移的连续变化也有重要的意义。
[Abstract]:Layout of the Qiangtang plateau in the core area of the 19 sets of soil temperature and humidity and 3 automatic weather stations in September 2013 -2014 year in October between the monitoring data based on the analysis of different sites in Qiangtang plateau in core area of 1 cm, 10 cm, the change of soil temperature diurnal and seasonal characteristics at 20 cm depth. The results showed that: (1) during the period of study site 1 cm, 10 cm, the average temperature of 20 cm depth of soil in the range of -16.27~17.18 DEG C, with the increase of soil depth, the temperature amplitude decreased gradually. (2) the average daily maximum temperature difference between the site does not exceed 12.82 degrees, mainly affected by the altitude and latitude. The influence of diurnal variation showed fast heating, slow cooling characteristics. (3) different depth average soil average temperature of the coldest month is -12.69 centigrade, the warmest month average temperature is 13.15 degrees, the interannual variation of daily average soil temperature at 30 degrees Celsius. In the soil freezing / coefficient of variation of soil temperature in the ablation process is very high, the surface is more clear Obviously, and the ablation process variability than the freezing process stronger. (4) in the month scale correlation 1 cm daily average soil temperature and air temperature, can reach more than 0.99. The research will help to fill the gaps in the soil temperature data of the region, to understand the regional frozen, alternating continuous ablation changes of soil heat transfer the process also has an important significance.

【作者单位】：中国科学院地理科学与资源研究所陆地表层格局与模拟重点实验室;中国科学院大学;中国科学院青藏高原地球科学卓越创新中心;江西师范大学地理与环境学院鄱阳湖湿地与流域研究教育部重点实验室;
【基金】：国家科技基础性工作专项重点项目(2012FY111400) 中国科学院战略性先导科技专项(XDB03030500) 国家科技支撑计划(2012BAC06B00)
【分类号】：S152.8

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