在韩半岛40年来受气候变化影响的时空空间湖区变化
1Center for Global Change and Earth Observations, Michigan State University, Lansing, MI, USA.
Scientific reports
|January 11, 2024
概括
40多年来,朝鲜半岛的湖泊面积不断扩大,主要是由于新建的水库. 大湖受到气候变化的影响,而小湖正在缩,显示人类活动对水资源的影响.
科学领域:
- 水文和远程传感技术
- 环境科学 环境科学
- 生态系统监测 生态系统监测
背景情况:
- 湖泊资源对韩国和朝鲜社会和生态系统至关重要.
- 了解时空湖泊动态对于水资源管理至关重要.
研究的目的:
- 40年来,在干旱季节期间,对朝鲜半岛湖区的时空变化进行描述.
- 确定这些变化的驱动因素,区分气候和人类影响.
主要方法:
- 利用Landsat 5-9卫星图像从1984年到2023年,绘制了975个湖泊的地图.
- 使用修改后规范差异水指数 (MNDWI) 准确划定湖泊界限 (准确率为92.3%).
主要成果:
- 由于水库的建设,干旱季的湖面总面积从1070.7平方公里 (1984) 增加到1659.3平方公里 (2023).
- 大湖 (>10平方公里) 的面积每年增加 (0.1%),受气候变化的影响.
- 小湖 (≤10平方公里) 的年面积减少 (0.15-0.5%),受气候变化影响较小.
结论:
- 时空空间湖泊面积的变化是由气候变化和人类活动的结合驱动的.
- 湖泊大小的不同趋势凸显了环境因素和人类影响的差异性影响.
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