塔中地区不同类型沙丘浅层地温观测

干旱区研究 ›› 2011, Vol. 28 ›› Issue (1): 163-167.

塔中地区不同类型沙丘浅层地温观测

贾效禄¹, 杨青^2,3, 霍文^2,3

1. 新疆师范大学地理科学与旅游学院, 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. 塔克拉玛干沙漠大气环境观测试验站, 新疆塔中 841000

收稿日期:2010-02-07 修回日期:2010-04-14 出版日期:2011-02-25 发布日期:2011-09-06
作者简介:贾效禄(1985－),男,山西朔州人,在读硕士研究生,从事沙漠气象方面的研究.E-mail:JiaXL2011@163.com
基金资助:
中央级公益性科研院所基本科研业务专项(IDM200702);中国沙漠气象科学研究基金(SQJ2007001,SQJ2009002);国家自然科学基金项目(40775019)共同资助

Observation of Ground Temperature at Shallow Layer of Different Dune Types in the Tazhong Area

JIA Xiao-lu¹, YANG Qing^2,3, HUO Wen^2,3

1. College of Geographic Science and Tourism, Xinjiang Normal University, Urumqi 830054, China;
2. Institute of Desert Meteorology , China Meteorological Administration, Urumqi 830002, China;
3. Taklimakan Station for Desert Atmospheric Environment Observation and Experiment, Tazhong 841000, Xinjiang, China

Received:2010-02-07 Revised:2010-04-14 Published:2011-02-25 Online:2011-09-06

摘要/Abstract

摘要： 2009年8月3～10日,通过对塔中地区流动沙丘和人工固定沙丘的地温测量,获得了不同深度的地温数据:① 夏季无论人工固定沙丘,还是流动沙丘表面地温的日较差都很大,日较差随着深度的增加逐渐变小,特别在沙丘20 cm深度处,地温的日较差较小;② 人工固定沙丘在相同深度的温度要比流动沙丘低;③ 在夏季地温和气温差值较大,出现了一年中最大值;④ 无论固定沙丘还是流动沙丘,风速对其表层温度的影响都较大。

关键词: 地温, 固定沙丘, 流动沙丘, 塔克拉玛干沙漠

Abstract: Land surface temperature affects the capability of long wave radiation, and it is an important parameter for studying climate change. The variation of air temperature and precipitation was often stressed in studying climate change in the Taklimakan Desert in the previous studies, but ground temperature in the desert was infrequently studied. In this paper, MicroLite 16K LITE5016 was used to examine the spatial distribution and temporal variation of ground temperature at shallow layer of different dune types in the Tazhong area located in the central Taklimakan Desert, where oceanic airstream is difficult to arrive. The Tazhong area is characterized by a typical continental climate with frequently and intensely wind-blown sand movement. The area of mobile dunes in Tazhong occupies more than 80% of the total area of the Taklimakan Desert. Temperature variation here is drastic, the maximum temperature is as high as 45.6 ℃, and the diurnal-nocturnal temperature difference is over 40 ℃. The annual sunshine duration in this area is 2 700 hours, accumulated temperature ≥0 ℃ is over 4 000 ℃, and the total solar radiation is 5 700-6 000 MJ/m². Precipitation in this area is low, the annual precipitation is no more than 50 mm and only 4-5 mm in minimum, and it is extremely arid climate.The values of ground temperature at different depths (0 cm, 10 cm and 20 cm) over a mobile dune and an artificially-fixed dune in the Tazhong area were measured during the period from August 3rd to 10th, 2009. The results are as follows: (1) Daily range of ground surface temperature was high in summer both for mobile dune and artificially-fixed dune, it was decreased with the increase of depth, and it was the lowest at depth of 20 cm; furthermore, the maximum ground temperature occurred 2 hours later from noon, and the minimum one occurred at dawn; (2) The ground temperature of artificially-fixed dune was lower than that of mobile dune; (3) The difference between ground temperature and air temperature was the highest in summer; (4) Wind speed affected significantly the ground surface temperature regardless of mobile dune or artificially-fixed dune.

Key words: ground temperature, fixed dune, mobile dune, Taklimakan Desert

中图分类号:

P463.2

贾效禄, 杨青, 霍文. 塔中地区不同类型沙丘浅层地温观测[J]. 干旱区研究, 2011, 28(1): 163-167.

JIA Xiao-lu, YANG Qing, HUO Wen. Observation of Ground Temperature at Shallow Layer of Different Dune Types in the Tazhong Area[J]. , 2011, 28(1): 163-167.

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