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| 塔里木南缘绿洲"冷岛"效应及与植被覆盖相关分析——以于田绿洲为例 | |
| 引用本文： | 马勇刚,塔西甫拉塔·特依拜,丁建丽,徐成波.塔里木南缘绿洲"冷岛"效应及与植被覆盖相关分析——以于田绿洲为例[J].干旱区地理,2007,30(6):865-870. |
| 作者姓名： | 马勇刚 塔西甫拉塔·特依拜 丁建丽 徐成波 |
| 作者单位： | 1. 新疆遥感中心,新疆,乌鲁木齐,830011;新疆大学,新疆,乌鲁木齐,830046 2. 新疆大学,新疆 乌鲁木齐,830046 3. 新疆大学,新疆,乌鲁木齐,830046 4. 中国灌溉与排水发展中心,北京,100054 |
| 基金项目： | 新疆大学重点实验室开放课题(XJDX0201-2007-06) |
| 摘 要： | 温度是生态系统中极其重要的因子。在中小尺度区域的热量资源和热场分布,对绿洲冷岛效应进行研究,评价绿洲的生态环境状况。通过利用TM/ETM遥感影像和利用Sobrino普适性单通道算法定量,反演了塔里木南缘于田绿洲1989年,1999年,2002年三个时期的陆地表面温度,通过植被覆盖度遥感估算模型提取了植被覆盖度。尝试将绿洲冷岛作为绿洲状况的评价因子,分析了温度场时空变化,在归一化地表温度-植被覆盖度二维散点图计算的基础上,对温度与植被覆盖的相关性进行分析。结果表明:(1)于田绿洲的冷岛效应有逐年减弱的趋势,主要表现为绿洲中心相对温度的升高;(2)将地表植被覆盖作为影响绿洲温度场变化的动因,结果显示,于田绿洲地表温度状况与植被覆盖状况有明显的负相关关系,相关系数在-0.48～0.78之间。地表温度对植被覆盖程度的变化十分显著。文章指出,冷岛效应对绿洲发展具有重要意义,可以将绿洲冷岛效应作为绿洲生态环境状况评价的一个重要指标。 |
| 关 键 词： | “冷岛”效应 植被覆盖 于田 塔里木南缘 |
"Cold island" effect and vegetation coverage in south Tarim Basin -a case study of Hetian oasis |
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| MA Yong-gang,Tashpolat TIYIP,DING Jian-li,XU Chenbo."Cold island" effect and vegetation coverage in south Tarim Basin -a case study of Hetian oasis[J].Arid Land Geography,2007,30(6):865-870. | |
| Authors: | MA Yong-gang Tashpolat TIYIP DING Jian-li XU Chenbo |
| Abstract: | Temperature is a very important factor in ecosystem.The resource and distribution of thermal energy have objective and direct proof to the analysis of the cold island effect and evaluation of the oasis ecological environment condition in middle and small scale areas.This paper retrieved the Land Surface Temperature with the TM/ETM remote sensing image and Sobrino general single channel,then distilled the vegetation cover ratio of Yutian area in the southern marginal zone of Tarim Basin oasis in 1989,1999 and 2002 through remote sensing estimate model of vegetation cover ratio.The paper regarded the cool island effect as an index for evaluating the oasis status,with the 2-D scatter plot of the NLST(normalize land surface temperature)and vegetation cover ratio,then analyzed their sensitivity.Some conclusions can be rearched:(1)a cool island effect has the weaker tendency in Yutian oasis according to the analysis of Yutian temperature field and the temperature raising center of Yutian.(2)there is a negative correlation between land surface temperature and vegetation status,the correlative quotients is between-0.48 and 0.78.There is a evident sensitivity between oasis surface temperature and the vegetation change.The paper pointed out that the cool island effect is very important to the development of oasis,adn the cold island effect can be taken as an important index for oasis ecological environment condition appraisal. |
| Keywords: | remote sensing "cool island" effect Yutian |
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