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大规模的遥感分析显示,草原活力与大气水需求的联系越来越大

Katja Kowalski¹, Cornelius Senf², Akpona Okujeni^1,3

¹Geography Department, Humboldt-Universität zu Berlin, Berlin, Germany.

Global change biology

|May 9, 2024

概括

中欧草原对干旱的敏感性越来越大,大气中的高水需求严重影响了生命力. 这一趋势表明,未来大规模的草原损失很可能是由于气候变化.

科学领域:

生态生态学生态生态学
环境科学环境科学
遥感遥感遥感遥感

背景情况:

草原提供重要的生态系统服务,但在气候变化下受到干旱的威胁.
了解草原对干旱的反应至关重要,尤其是在中欧多样化的景观中.

研究的目的:

量化草原对德国干旱的时空敏感性.
分析不同草原息地类型干旱敏感性的变化.

主要方法:

使用了一种新的遥感数据集 (Landsat/Sentinel-2) 从1985年到2021年.
将卫星数据与气候再分析数据配对,以评估草原活力和干旱指数.
研究了草原活力和干旱指数之间的联系,探索了息地特定的敏感性.

主要成果:

在过去的干旱期间,草原的活力显著下降,2018-2019年显示出最大的多年下降.
草原的活力一直与干旱联系在一起,蒸汽压力缺陷是最强的预测因素.
干旱敏感性随着时间的推移而增加,并且在息地类型中存在差异,在干旱和平草原中最高.

结论:

这项研究提供了第一个大规模的长期证据,证明中欧草原的干旱敏感性越来越高.
高大气水需求显著影响草原的活力,这一趋势预计会随着气候变化而恶化.
未来的复合干旱和热浪可能会增加大规模草原生命力丧失的可能性.

关键词:

欧尼斯 (EUNIS) 是一个国际组织.陆地卫星 (Landsat) 是一个地球卫星.哨兵-2 在线观看蒸汽压力缺陷是指蒸汽压力缺陷.干旱干旱干旱干旱息地息地息地息地时间序列时间序列

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