伊犁河谷2001-2014年地表温度时空分异特征

doi:10.7522/j.issn.1000-694X.2017.00012

摘要/Abstract

摘要： 地表温度是地表能量平衡、区域和全球尺度地表物理过程的一个重要因子。为了辨析中国西北干旱区“天山湿岛”——伊犁河谷的地表温度时空分异，采用趋势分析法和空间数据统计法，探讨了2001-2014年不同土地利用/覆盖类型下地表温度时空变化规律，分析地表温度的时空分异特征及原因。结果表明：（1） MODIS LST产品的精度（平均R²=0.90）能够满足伊犁河谷地表温度时空变化分析的要求；（2）空间上，地表温度呈现出中部高四周低的变化趋势，高温区面积约占总面积的41%，低温区面积约占总面积的23%；时间上，伊犁河谷平均地表温度的年际波动较大，以2013年、2006年、2007年和2008年尤为突出；地表温度的年内变化呈现出单峰型分布，地表温度高值集中在3-8月，最高值出现在7月；（3）不同土地利用/覆盖类型下年均地表温度分布的总体特征为建设用地最高，稀疏草地、旱地等次之，冰川/积雪最低；（4）伊犁河谷地表温度变化趋势呈严重减少、基本不变和轻微增加区域面积分别占5%、37%和26%，以基本不变和轻微增加为主。伊犁河谷地表温度时空变化不仅受大尺度气候变化影响，还受土地类型差异影响，两者共同构成了不同地理区域及景观的温场格局，绿色植被对地表温度时空分布具有重要的调节作用。

关键词: 地表温度, 伊犁河谷, MODIS, 土地利用/覆盖变化, 时空格局变化

Abstract: Land surface temperature (LST) is an important parameter for surface energy balance, physical processes in regional and global scale. In order to discriminate the characteristics and attributions of LST in "Wet Island of Tianshan Mountain", Ili River Basin area by the methods of variation trend and spatial statistics, the spatio-temporal distribution rules of LST in different land use types are discussed during recent 14 years (2001-2014). The results demonstrate that:(1) MODIS LST product is applicable for the analysis of spatio-temporal distribution characteristics of LST in Ili River Valley (mean R²=0.90); (2)The distribution of LST had different spatial patterns obviously in Ili River Valley, The average LST from 2001 to 2014 changed obviously, and the sudden ascent happened in 2013, 2006, 2008 and 2013; LST values in the center of river area are higher than the marginal areas, the percentage of high temperature area and low temperature area accounted for 41% and 23% respectively; Furthermore, the seasonal variation of LST shows a unimodel pattern, and its peak value occurs in July; (3)The spatial distribution of annual average LST differ according to land cover types:the highest annual average LST is distributed in the construction lands, in the second place is grass land and dry land, then minimum annual average LST is distributed in the glacier and snow cover; (4)The LST trend was classified as severely reduced, basically unchanged and slight increase, and their corresponding percentage of area are 5%, 37% and 26% respectively; belong to basically unchanged and slight increase areas of LST trend are dominant. The spatio-temporal variation of LST not only is influenced by the global climate change, but also is affected by temperature field of different land use/cover change in different district and zone. Vegetation cover and its distribution are contributing to the spatio-temporal distribution of regional LST.

Key words: land surface temperature, Ili River Valley, MODIS, land use/cover change, spatio-temporal variation

中图分类号:

P467

热伊莱·卡得尔, 玉苏甫·买买提, 玉素甫江·如素力, 阿迪来·乌甫, 艾则孜提约麦尔·麦麦提, 姜红. 伊犁河谷2001-2014年地表温度时空分异特征[J]. 中国沙漠, 2018, 38(3): 637-644.

Reyilai Kadeer, Yusufu Maimaiti, Yusufujiang Rusuli, Adilai Wufu, Aizezitiyuemaier Maimaiti, Jiang Hong. Spatio-temporal Variation of Land Surface Temperature in the Ili River Valley during 2001-2014[J]. Journal of Desert Research, 2018, 38(3): 637-644.

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