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森林植被在欧洲变暖中的扩大局部冷却效应
Yitao Li1,2,3, Jun Ge4, Hua Wu5
1State Key Laboratory of Resources and Environmental Information System, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China.
Nature communications
|September 25, 2025
概括
森林会影响当地气温,由于气候变化,冬季的变暖效应会减弱,夏季的冷却效应会加剧. 这些观察到的陆地表面温度 (LST) 趋势凸显了森林的动态作用.
科学领域:
- 环境科学 环境科学
- 气候科学 气候科学
- 森林生态 森林生态
背景情况:
- 森林通过生物物理过程影响当地气候,与开放区域相比,影响土地表面温度 (LST).
- 地球系统模型预测气候变化下的森林温度效应的演变,但观测数据缺乏.
- 了解这些时间动态对于气候变化适应和减缓战略至关重要.
研究的目的:
- 量化过去二十年来欧洲森林变化对当地LST影响的时间趋势.
- 将观察到的趋势与来自最先进的地球系统模型的预测进行比较.
- 通过考虑森林生物物理效应的动态,为森林相关的气候政策提供信息.
主要方法:
- 利用卫星观测,在20年的时间内比较附近森林和开放土地的LST.
- 分析了森林引起的变暖和变冷效应的季节性趋势.
- 对来自多个地球系统模型的模拟进行验证的结果.
主要成果:
- 由于降低了积雪覆盖,森林的冬季白天变暖效应已经减弱并逆转为降温 (-0.142 K/十年).
- 由于土壤对干旱的抵抗力更强,森林在夏天白天的冷却效应加剧了 (-0.188 K/十年).
- 观察到的趋势与模型预测一致,尽管具有显著的模型间变化.
结论:
- 森林的当地气候调节是动态的,随着气候变化而演变.
- 观察到的冬季和夏季LST趋势需要更新的气候模型和森林管理策略.
- 纳入这些生物物理效应动态对于有效的森林气候政策至关重要.
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