JpGU-AGU Joint Meeting 2017

講演情報

[EE] 口頭発表

セッション記号 H (地球人間圏科学) » H-TT 計測技術・研究手法

[H-TT20] [EE] Geographic Information Systems and Cartography

2017年5月20日(土) 13:45 〜 15:15 106 (国際会議場 1F)

コンビーナ:小口 高(東京大学空間情報科学研究センター)、村山 祐司(筑波大学大学院生命環境科学研究科地球環境科学専攻)、若林 芳樹(首都大学東京大学院都市環境科学研究科)、座長:小口 高(東京大学空間情報科学研究センター)、座長:若林 芳樹(首都大学東京大学院都市環境科学研究科)

14:00 〜 14:15

[HTT20-02] Investigating the relationships between land surface temperature and social-ecological variables: A case study of Nanchang City, China

*XINMIN ZHANG1Ronald C. Estoque1Yuji Murayama1 (1.University of Tsukuba )

キーワード:Urban heat island, Land surface temperature, Land use/land cover, Population density, Fossil-fuel carbon dioxide emission, Nanchang City

In the context of rapid urbanization and population growth, urban planners and policy makers require information on factors contributing to the urban heat island (UHI) effect. This study investigated the relationship between land surface temperature (LST) and multi exploratory variables in Nanchang City, China. We used Landsat images from 2000 and 2013 to detect land use/land cover changes (LULC). Exploratory variables included: Normalized Difference Vegetation Index (NDVI), Normalized Difference Built-up Index (NDBI), population density and fossil-fuel carbon dioxide (CO2) emissions. The urban area increased from 4,830–12,090 ha, a net increase of 150.31%. The autumn LST ranged from 17.09–35.20°C on September 15, 2000 and from 14.98–37.87°C on October 5, 2013. This indicated that urbanization has resulted in a strong UHI effect in Nanchang City. NDBI, population density, fossil-fuel CO2 emissions and LST were positively correlated, while LST and NDVI were negatively correlated. The highest temperatures were in urban and bare land, while water and forest had the lowest temperatures. Urban green space planning could be used to alleviate the UHI effect and create a livable city. Population density should be distributed more evenly to mitigate disparity and fossil-fuel CO2 emissions should be controlled to save energy consumption.