古尔班通古特沙漠腹地秋季浅层地温特征分析  

The Analysis of Shallow-ground Temperature Features in Autumn over Guerbantonggute Desert Hinterland

作　　者：曹兴[1,2] 魏文寿[2] 陈荣毅[2] 季枫 杨举芳 徐根生[1,2] 

机构地区：[1]新疆师范大学,新疆乌鲁木齐830054 [2]中国气象局乌鲁木齐沙漠气象研究所,新疆乌鲁木齐830002 [3]乌兰乌苏农业气象试验站,新疆石河子832021

出　　处：《沙漠与绿洲气象》2010年第2期26-31,共6页Desert and Oasis Meteorology

基　　金：中国气象局乌鲁木齐沙漠气象研究所所长基金(SZJJ200703);新疆气象局项目"干旱区棉田土壤CO2通量研究";新疆科技厅自然基金(2009.211B41)共同资助

摘　　要：以古尔班通古特沙漠腹地为试验区,利用2009年9—10月3种不同植被覆盖下浅层地温数据,分析了秋季地温的变化特征以及降水和人类活动对地温的影响。结果表明:秋季地温呈现波动的下降过程,梭梭地温降幅达8.1℃,为最大。晴天时,梭梭、苜蓿、麻黄的地温日变化为标准的波形,变化过程明显。而多云天气时的地温白天上升幅度小,甚至下降,其日变化幅度远小于晴天。地温的昼夜变化过程差异明显,白天地温均值高于夜间。此外降水、灌溉使得地温下降,在随后的1～2d后逐步回升,而苜蓿的收割导致地温日变化更加明显。天气状况、降水、灌溉等可以造成地温峰值位相提前或滞后,但谷值的位相却相对稳定在08时前后。Taking Guerbantonggute Desert hinterland as the test region, and using the data of shallow-ground soil temperature under three types of vegetation overcast from Sept. to Oct. 2009, this paper analyzed the change character of ground temperature in autumn and the impact of precipitation and human activity on ground temperature. The result shows that the ground temperature in autumn descends with undulate, the Haloxylon ammoden-dron ground temperature has the most descending amplitude of 8.1℃. On fine days, the ground temperature of Haloxylon ammoden-dron, Medlcago and Ephedra przewalskii present standard undulance, and the change process is evident. While ground temperature on cloudy days rises less, even descend sometimes, so the daily change is much less than that on fine day. The difference of day-night ohground temperature is evident; the daily soil temperature is higher than that at night. Furthermore, precipitation and irrigation make the ground temperature fell, but it returns after 1-2 days, moreover, the harvestry of Medlcago makes the daily vibration of ground temperature more evidently. The peak values of ground temperature move up or lag by the influence of weather condition, precipitation and irrigation. But the daily minimum values occur steadily relatively in 08：00 A.M. in front and back.

关 键 词：古尔班通古特 秋季 地温 特征 

分 类 号：S162[农业科学—农业气象学]