春季变暖对北方植物生产力的广泛季节性补偿影响
Wolfgang Buermann1,2, Matthias Forkel3, Michael O'Sullivan4
1Institute for Climate and Atmospheric Science, School of Earth and Environment, University of Leeds, Leeds, UK. wolfgang.buermann@geo.uni-augsburg.de.
Nature
|October 5, 2018
概括
北方生态系统的温泉可能会对植物的生产力产生负面影响, 这些影响很普遍,但目前的气候模型并未完全捕捉到它们.
科学领域:
- 生态学
- 气候科学
- 遥感技术
背景情况:
- 气候变化改变了植物现象,影响了生态系统功能和气候反.
- 北方生态系统的温泉通常会提前生长,
- 春季暖气对后季生产力的延迟影响已被观察到,但对其了解甚少.
研究的目的:
- 分析北方生态系统对春天温暖的反应.
- 将观测数据与地球碳循环模型的预测进行比较.
- 确定影响滞后效应的方向和分布的因素.
主要方法:
- 分析了1982-2011年间的卫星,现场和建模数据.
- 受不利和有利的落后生产力反应影响的面积的量化.
- 统计分析以确定海拔和降水的影响.
主要成果:
- 发现了对春季温暖的广泛,相反的落后生产力反应.
- 观察数据显示,研究区域的~15%具有不良延迟作用,约5%具有有益作用.
- 模型低估了不利的滞后效应,高估了有益的效应,特别是由于水压.
结论:
- 春季变暖对北方生态系统生产力的滞后影响是显著的,并且在地理上有所变化.
- 季节性缺水可以抵消温泉带来的好处,
- 高度和降水模式是滞后生产力反应的关键决定因素.
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