J4 ›› 2011, Vol. 29 ›› Issue (4): 433-438.

• 论文 • 上一篇    下一篇

沙漠腹地秋季地温变化特征及其与气温的关系

曹兴1 ,陈荣毅2 ,杨举芳3 ,季枫3王进3   

  1.  1. 新疆乌鲁木齐市气象局,新疆乌鲁木齐830000; 2. 中国气象局乌鲁木齐沙漠气象研究所,新疆乌鲁木齐830000; 3. 乌兰乌苏农业气象试验站,新疆石河子832100.
  • 收稿日期:2011-06-14 修回日期:2011-07-07 出版日期:2011-12-31 发布日期:2011-12-31
  • 作者简介:曹兴( 1984 - ) ,男,硕士,主要从事沙漠地—气交换研究. E - mail: cxidm@163. com
  • 基金资助:

     国家自然科学基金项目( 40801019) 、新疆维吾尔自治区自然科学基金( 2009211B41) 及新疆气象局项目( 200806) 共同资助

Characteristics of Soil Temperature and Its Relationship with Air Temperature in Autumn in the Hinterland of the Guerbantonggute Desert

CAO Xing1,CHEN Rongyi2,YANG Jufang3,JI Fen3WANG Jin3   

  1.  1. Urumqi Meteorological Bureau of Xinjiang,Urumqi 830000,China; 2. Institute of Desert Meteorology,CMA,Urumqi 830002,China; 3. Wulanwusu Agro - meteorological Experiment Station,Shihezi 832100,China.
  • Received:2011-06-14 Revised:2011-07-07 Online:2011-12-31 Published:2011-12-31

摘要:

 以古尔班通古特沙漠腹地为试验区,利用2009 年9 ~ 10 月不同深度的地温数据,分析了秋季各层地温的变化特征以及其对气温的响应。结果表明: 秋季各层地温呈波动缓慢下降过程,变化倾向率为负值,且由浅至深向下递减,0cm 的地温下降趋势显著,递减变化率为0. 22 ℃ /d; 地温日变化呈正弦曲线变化过程,白天高,夜间低。随深度的增加,日较差逐步减小,日变化过程变缓,位相往后。午后达到日最高值,日出前下降至最低值; 晴天时,地温变幅垂直方向上表现为上层大、下层小的“锥形”形态。浅层地温对降水的响应明显,地温随着降水发生而下降,且与晴天条件下的地温垂直结构差别较大; 地温与气温呈线性正相关,随深度的增加,相关系数减小,地温变幅差异减小,且位相逐层滞后,时滞效应增强。
 

关键词: 沙漠, 秋季, 地温, 特征, 响应

Abstract:

Based on soil temperature data on different depth from September to October of 2009 in the thinterland of Guerbantonggute Deser,the change character of soil temperature in autumn and its response to air temperature were analyzed in this paper. The results show that the soil temperature of each layer presented slow descending and fluctuating trend,the 0 cm soil temperature declined significantly with the decresing rate of 0. 22 ℃ /d. The diurnal variation of soil temperature was a sine curve with high during daytime and low at night,and with the increase of depth,the daily soil temperature range decreased and the diurnal variation was no longer so extremely.The soil temperature was maximum in the afternoon and dropped to minimum value before sunrise. On a sunny day,the vertical variation of soil temperature presented larger in the upper layer and smaller in the lower layer. The response of soil temperature of upper layer to precipitation was obvious,and soil temperature dropped with the start of the rainfall,the vertical structure of soil temperature was greatly different from that on a sunny day. The soil temperature correlated significantly with air temperature ( linear positive crrelation),and a tendency of correlation coefficient decreasing from upper to lower layer.

Key words: desert, autumn, soil temperature, feature, response

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