We analyzed the relationship between changes in land cover and the time-series trend of temperature using 40 years’ worth of data (1980–2019) from 38 weather stations in South Korea to establish mitigation strategies for the rising temperature and heat island effect in urban areas. Changes in temperature were estimated by analyzing the time-series trend slope using daily mean temperature data. Stations with a high trend slope showed a mean temperature rise of 2 °C over the study period, and those with a low trend slope had a mean temperature rise of 0.5 °C. In land cover change, each study site was classified into three categories: areas with heavy urbanization, areas with few land-cover changes, and decreased rural and forest areas. A correlation analysis between the land-cover change and temperature trend slope revealed a positive correlation between urban areas and the trend slope and a negative correlation between forest areas and the trend slope. The expansion of urban areas resulting from the development of forest areas was identified as the cause of the long-term increase in the urban temperature. These results will serve as useful data in the urban and environmental planning phase for mitigating urban heat island effects.

我们使用来自韩国38个气象站的40年数据（1980-2019），分析了土地覆盖变化与温度时间序列趋势之间的关系，从而建立了缓解城市气温升高和热岛效应的策略地区。通过使用每日平均温度数据分析时间序列趋势斜率来估算温度变化。在研究期内，趋势斜率高的站点的平均温度升高了2°C，而趋势斜率低的站点的平均温度升高了0.5°C。在土地覆被变化方面，每个研究地点都分为三类：城市化程度高的区域，土地覆被变化少的区域以及农村和森林面积的减少。土地覆盖变化与温度趋势坡度的相关分析表明，城市面积与趋势坡度呈正相关，而森林面积与趋势坡度呈负相关。森林面积的发展导致城市面积的扩大被认为是城市温度长期升高的原因。这些结果将在城市和环境规划阶段用作缓解城市热岛效应的有用数据。