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中国沙漠 ›› 2007, Vol. 27 ›› Issue (5): 866-869.

• 天气与气候 • 上一篇    下一篇

塔里木南缘绿洲“冷岛”效应时空变化研究——以于田地区为例

马勇刚1,2, 贡 璐2, 丁建丽2   

  1. 1.新疆遥感中心, 新疆 乌鲁木齐 830011; 2.新疆大学资环学院, 新疆 乌鲁木齐 830046
  • 收稿日期:2006-05-27 修回日期:2006-09-11 出版日期:2007-09-20 发布日期:2007-09-20

Spatial-Temporal Change of “Cool Island” Effect in Southern Tarim Basin: A Case Study in Yutian Oasis

MA Yong-gang1,2, GONG Lu2, DING Jian-li2

  

  1. 1.Xinjiang Remote Sensing Center, Urumqi 830011, China; 2.College of Resources and Environment Sciences, Xinjiang University, Urumqi 830046, China
  • Received:2006-05-27 Revised:2006-09-11 Online:2007-09-20 Published:2007-09-20

摘要:

利用遥感技术,选取研究区TM/ETM热红外波段,反演了塔里木盆地南缘绿洲于田地区1989年、1999年、2002年的陆表温度(LST),构建了绿洲“冷岛”比例指数(OCRI),定量分析了于田地区14 a来,绿洲内部“冷岛”效应的时序变化,指出于田绿洲“冷岛”效应有减弱的趋势;并且通过对于田温度场的分析,总结了“冷岛”效应空间变化的特点:①于田县绿洲内外部温度差异变小,温度波动趋缓,“冷岛”效应减弱;②于田县城建成区面积的扩大减弱了“热岛”效应的强度和范围。

关键词: 遥感, “冷岛”效应, 于田

Abstract:

“Cool island” effect is a major aspect in oasis effect. This thesis has retrieved the Land Surface Temperature (LST) of Yutian area in the southern marginal zone of Tarim Basin in 1989, 1999 and 2002; constructed the Oasis-Cold-Island Ratio Index; established the west to east and the north to south temperature profiles taking the Yutian county as the centre; has quantitatively analyzed the spatial-temporal change of “cool island” effect in interior Yutian oasis for 14 years; pointed out “the cool island effect” has the weaker tendency in Yutian oasis; and through the analysis to Yutian temperature field, summarized the representation aspects of the space variation of “the cool island effect”: ①the expansion of Yutian county has weakened the intensity and the scope of “cool island effect”; ②in Yutian county, the interior temperature gradient changes slightly and the temperature fluctuation becomes slower.

Key words: remote sensing, “cool island” effect, Yutian oasis

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