西安市热岛效应与植被覆盖度的关系研究  

A Study of Relationship Between Xi'an Heat Island Effect and Vegetation Fraction

作　　者：张善红[1] 丁小松[1] 

机构地区：[1]商洛学院城乡规划与建筑工程学院,陕西商洛726000

出　　处：《商洛学院学报》2016年第6期76-81,共6页Journal of Shangluo University

基　　金：国家林业公益性行业科研专项项目(201304309);商洛学院科研基金项目(14KY017)

摘　　要：利用2003年6月Landsat5 TM和2014年8月Landsat8 OLT_TIRS两期遥感影像数据对西安市主城区夏季热岛效应强度与同期植被覆盖度关系进行研究。结果表明:植被覆盖度与热岛效应强度呈负相关,西安市主城区植被覆盖度每增加10%,平均降温0.47℃,但植被覆盖度对降低温度的影响却因地而异;西安市植被覆盖在空间上呈现自一环向三环主城区外围逐渐减小的趋势(植被覆盖度分别为45%、42%和38%),地表温度温差自一环至三环呈现降低的趋势(地表温差分别为18.88℃、14.62℃和9.43℃);2014年较2003年,西安市主城区植被覆盖向低等植被覆盖快速过渡,人类活动对城市自然景观影响日趋加重。Relationship between the intensity of heat island effect and vegetation fraction in the summer in the central area of Xi＇ an, Shannxi province, is studied by using Landsat5 TM data in June, 2003 and Landsat8 OLT_TIRS data in July, 2014. The results show that negative correlation is expressde in the relationship between vegetation fraction and urban heat island effect. The temperature reduces 0.47 ℃ when the vegetation fraction degree is increase 10%; Xi＇an vegetation from a ring in a space to the third ring road outside the main gradually decreases （vegetation coverage is respectively： 45%, 42 % and 38%）, the surface temperature difference in temperature on the space from a ring to three-ring reduce trends （the earth＇s surface temperature difference are 18.88 ℃, 14.62 ℃ and 18.88℃）; vegetation fraction in the central area of Xi＇an rapidly has transitioned to lower ones from 2003 to 2014, which can be seen that human activity exerts increasingly worse influence on urban natural landscape.

关 键 词：热岛效应 植被覆盖度 西安市 

分 类 号：X16[环境科学与工程—环境科学]