本文選題：熱島強度 + 地表溫度　； 參考：《地球信息科學學報》2017年11期

【摘要】：城市熱島效應作為城市范圍的一種典型氣候特征,在近年來受到了廣泛的關注。了解城市熱島時空演變及形成原因對緩解城市熱環(huán)境和提高人居舒適性有著重要意義。以北京市中心城區(qū)為例,首先,基于Landsat衛(wèi)星2005、2010、2016年的熱紅外影像數據反演得到地表溫度,采用均值標準差方法對地表溫度進行劃分得到多等級的熱島強度,分析城市熱島的空間格局和隨時間的演變規(guī)律;其次,提取不透水層、植被、裸土和水體4種典型地物類型,統(tǒng)計不同年份下各熱島強度之間的轉移信息并計算相關的熱力景觀格局指數;接著,依據離市中心的距離將中心城區(qū)分為30級緩沖區(qū),統(tǒng)計分析每一級緩沖區(qū)內各地物類型的面積比例與熱島強度信息。最后,以各地物類型的統(tǒng)計數據,結合離市中心的距離,建立各影響因子與熱島強度之間的多元關系模型,綜合分析地物類型和市中心的距離變化對城市熱島的影響。結果表明:北京中心城區(qū)整體熱島強度呈逐年增長的趨勢,高等級熱島強度的熱力斑塊面積逐步擴張,熱力景觀類型的多樣性隨時間推移呈下降態(tài)勢。不透水層對熱島強度的影響較大,具體表現(xiàn)為不透水層蓋度越高,熱島強度越大;熱島強度隨離市中心距離的增大逐漸降低。
[Abstract]:As a typical urban climate feature, urban heat island effect has been paid more and more attention in recent years.It is important to understand the temporal and spatial evolution of urban heat island and its causes to alleviate the urban thermal environment and improve the comfort of human settlements.Taking the central urban area of Beijing as an example, first of all, based on the thermal infrared image data of Landsat satellite 2005 / 2010 and 2016, the surface temperature is retrieved, and the mean standard deviation method is used to divide the surface temperature to obtain multi-grade heat island intensity.The spatial pattern of urban heat island and its evolution over time are analyzed. Secondly, four types of typical features, including impermeable layer, vegetation, bare soil and water body, are extracted.Statistics the transfer information between different heat island intensity in different years and calculate the related thermal landscape pattern index. Then, according to the distance from the city center, the central city is divided into 30 buffer zones,The area ratio and heat island intensity information of each class buffer are analyzed.Finally, based on the statistical data of the local object types and the distance from the city center, the multivariate relationship model between the influence factors and the intensity of the heat island is established, and the influence of the type of the feature and the distance change of the city center on the urban heat island is analyzed synthetically.The results show that the overall heat island intensity of the central city of Beijing is increasing year by year, the thermal patch area of the high grade heat island intensity is gradually expanding, and the diversity of the thermal landscape type is decreasing with the passage of time.The influence of impermeable layer on the strength of heat island is greater, the more the cover of impermeable layer is, the greater the intensity of heat island is, and the intensity of heat island decreases with the increase of distance from the center of the city.
【作者單位】： 首都師范大學資源環(huán)境與旅游學院;資源環(huán)境與地理信息系統(tǒng)北京市重點實驗室;
【基金】：國家自然科學基金項目(41671339)
【分類號】：X16

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本文編號：1753879