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当地温度对实际土地覆盖变化的反应具有显著的度变化和不对称性
Xiangyang Liu1, Zhao-Liang Li2, Yitao Li3
1State Key Laboratory of Efficient Utilization of Arid and Semi-arid Arable Land in Northern China, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
Science bulletin
|October 18, 2023
概括
土地覆盖变化 (LCCs) 从2006年至2015年,全球平均气温增加了0.08K. 这些变化,特别是耕地扩张和森林LCC,显著影响当地表面温度,并影响气候适应战略.
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:
- 土地覆盖变化 (LCC) 通过生物物理过程影响当地表面温度.
- 之前的研究经常使用空间换时间假设,限制了对实际LCC影响的理解.
- 不同LCC对温度的现实影响仍未得到充分研究.
研究的目的:
- 评估所有类型的现实的LCC对表面温度的实际影响.
- 为了全面评估,利用一个带有高分辨率卫星数据的时空图.
- 量化LCCs对并发变暖的贡献.
主要方法:
- 采用一个空间和时间评估方案.
- 从2006年到2015年使用了广泛的高分辨率 (1公里) 卫星观测数据.
- 分析了不同度和LCC类型的温度变化.
主要成果:
- 在LCC地区的全球平均温度增加了0.08K,具有显著的度变化 (-0.05到0.18K).
- 农田的扩张导致了北方中度地区的冷却;森林LCC导致了其他地区的变暖.
- 低温温室占并发变暖的高达44.6%,变暖效应比冷却效应更频繁和强烈.
结论:
- 实际的LCC对表面温度有显著而不对称的影响,而变暖效应往往占主导地位.
- 这些发现突显了LCC在当地和区域变暖中的重要作用.
- 结果为土地管理和气候适应政策提供了现实的影响.
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