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首页> 外文期刊>International Journal of Environment and Bioenergy >Assessment of Urban Heat Island over Ibadan Metropolis Using Landsat and Modis
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Assessment of Urban Heat Island over Ibadan Metropolis Using Landsat and Modis

机译：使用Landsat和Modis评估伊巴丹大都市上的城市热岛

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Urban growth and economic dependence on land and its numerous resources have been the major driving force shaping various landscapes. It has become an increasing evident that large development influences the climate. There are worries that rising temperature over developed areas could have adverse impact and increase living discomfort within city areas. In this study, the effect of urban heat island is analyzed using the Landsat TM, ETM+, OLI, and Moderate Resolution Imaging Spectroradiometer MODIS. Two algorithms were applied to retrieve the land surface temperature (LST) distribution from the Landsat TM, ETM+, OLI and MODIS data. The spatial pattern of LST in the study area is retrieved to characterize their local effects on urban heat island. However, the correlation between LST and the normalized difference vegetation index (NDVI), was analyzed to discover the impacts of the green land on the urban heat island. The results indicate that the effect of urban heat island in Ibadan is dominant in the central area (Challenge, Mokola, Oluyole, Yemetu, etc.) of the city and the North-Western part of the city. However, there exist a negative correlation between LST and NDVI, -0.8492, -0.7884, -0.6926 in 1986, 2002 and 2015 respectively. Which means green land can weaken the effect of urban heat island. UHI intensities from remotely sensed data shows an average of 5.32°C warmer than the rural areas in the last decade.
机译：城市发展和经济对土地及其众多资源的依赖一直是塑造各种景观的主要动力。越来越大的证据表明，大的发展会影响气候。令人担忧的是，发达地区的气温升高可能会对城市地区造成不利影响并增加人们的居住不适感。在这项研究中，使用Landsat TM，ETM +，OLI和中等分辨率成像光谱仪MODIS分析了城市热岛效应。应用了两种算法从Landsat TM，ETM +，OLI和MODIS数据中检索地表温度（LST）分布。检索研究区域内LST的空间格局，以表征其对城市热岛的局部影响。然而，分析了LST与归一化植被指数（NDVI）之间的相关性，以发现绿地对城市热岛的影响。结果表明，伊巴丹的城市热岛效应在该城市的中部地区（挑战区，莫科拉州，奥卢尤尔州，叶梅图省等）和西北部地区占主导地位。然而，分别在1986年，2002年和2015年，LST和NDVI之间分别呈负相关，分别为-0.8492，-0.7884和-0.6926。这意味着绿地可以削弱城市热岛效应。过去十年中，来自遥感数据的超高强度烈度显示平均比农村地区高5.32°C。

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