【摘要】：正確理解城市熱島效應(yīng)的形成機(jī)制及其影響因素是制定熱島效應(yīng)緩解政策和研究城市生態(tài)問題的前提和基礎(chǔ)。選用1987年9月26日的Landsat-5和2013年9月17日的Landsat-8遙感影像進(jìn)行地表溫度反演,分析武漢市城市熱島效應(yīng)的時空演變特征;對熱島效應(yīng)明顯的武漢市主城區(qū)進(jìn)行格網(wǎng)劃分,提取格網(wǎng)內(nèi)地表溫度及所選影響因子指標(biāo)值,運用主成分回歸方法進(jìn)行地表溫度多因子綜合分析,探討城市熱島形成的主要影響因素。結(jié)果表明:(1)武漢市地表溫度空間分布表現(xiàn)出典型的熱島特征,1987年和2013年分別有27.7%和39.1%的范圍被"熱島"覆蓋;(2)影響武漢城市熱島效應(yīng)的主要因素有不透水面指數(shù)、水體面積比例、歸一化建筑指數(shù)、歸一化植被指數(shù)及綠地面積比例;(3)當(dāng)其他影響因素穩(wěn)定時,不透水面指數(shù)每增加1%,可使地表溫度增溫0.04℃~0.10℃;水體面積每增加1%,可降低地表溫度0.03℃。
[Abstract]:The correct understanding of the formation mechanism of urban heat island effect and its influencing factors are the premise and foundation of formulating the policy of alleviating the heat island effect and studying the urban ecological problems. Land surface temperature inversion was carried out from Landsat-5 images of September 26, 1987 and Landsat-8 images from September 17, 2013, and the spatial and temporal evolution characteristics of urban heat island effect in Wuhan were analyzed. The main urban area of Wuhan city with obvious heat island effect is divided into grid, the surface temperature and the selected factor index value are extracted, and the multi-factor comprehensive analysis of surface temperature is carried out by principal component regression method. The main factors influencing the formation of urban heat island are discussed. The results show that: (1) the spatial distribution of surface temperature in Wuhan shows typical heat island characteristics, 27.7% in 1987 and 39.1% in 2013 are covered by "heat island"; (2) the main factors affecting the urban heat island effect in Wuhan are water surface index, water area ratio, normalized building index, normalized vegetation index and green area ratio; (3) when other influencing factors are stable, the surface temperature can be increased by 0.04 鈩，

本文編號：2397599