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In Situ Soil Moisture Sensors in Undisturbed Soils
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中国西南部云南省陆地表面温度变化
1College of Architecture and Civil Engineering, Kunming University, Kunming, 650214, China. huohong@lzb.ac.cn.
Environmental monitoring and assessment
|December 17, 2024
概括
中国云南省的陆地表面温度 (LST) 显示出显著的变暖趋势,特别是在夜间和3500米以上,突出了高度依赖变暖 (EDW). 气候变化的影响在空间和土地覆盖面上有所不同,建筑区的变暖速度最快.
科学领域:
- 环境科学 环境科学
- 气候科学 气候科学
- 遥感 遥感 遥感 遥感
背景情况:
- 高海拔地区对气候变化非常敏感.
- 长期陆地表面温度 (LST) 数据在低度,高海拔山区很少.
- 了解时空空间LST变化对于气候变化评估至关重要.
研究的目的:
- 调查2001-2020年云南省 (YNP) 上LST的时空变化.
- 在各种时间尺度上确定LST变化的主导驱动因素.
- 具体分析该地区的高度依赖变暖 (EDW) 模式.
主要方法:
- 使用中等分辨率成像光谱辐射仪 (MODIS) 数据用于LST观测.
- 分析了长期LST数据 (2001-2020年) 来确定趋势和变化.
- 研究了LST与气候因素 (温度,降雨) 和土地覆盖类型之间的相关性.
主要成果:
- 年度LST增加了0.18°C十年−1,夏季的上升更为明显 (0.47°C十年−1).
- 与白天 (−0.08°C) 相比,夜间LST显著增加 (0.43°C十年-1),显示出不对称的日间变暖.
- 确认EDW,增强升温在3500米以上;升温趋势在空间上有所不同,在建成土地上最为显著.
结论:
- 延边地区正在经历显著的变暖,有显著的EDW和不对称的日间温度变化.
- 温度和降水是LST的关键驱动因素,土地覆盖面影响着变暖趋势.
- 这些发现为高海拔热带和亚热带地区的气候变化动态提供了关键的见解.
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