Biophysical climate impacts of recent changes in global forest cover
Biophysical climate impacts of recent changes in global forest cover
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DOI：
10.1126/science.aac8083
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发表时间：
2016-02-05
期刊：
影响因子：
56.9
通讯作者：
Cescatti, Alessandro
中科院分区：
文献类型：
--
作者：
Alkama, Ramdane;Cescatti, Alessandro
森林覆盖的变化通过调节陆地-大气的能量和水通量影响当地气候。这种生物物理影响的程度在科学界仍有争议，目前在气候条约中被忽视。在这里，我们提出了一个观测驱动的评估最近的森林损失和收益的气候影响，根据地球观测全球森林覆盖和地表温度。我们的研究结果表明，森林损失放大了日温度变化，并增加了平均和最高气温，最大的信号在干旱区，其次是温带，热带和寒带。在2003-2012年的十年中，森林覆盖的变化产生了平均生物物理变暖的土地对应于约18%的全球生物地球化学信号，由于CO2排放的土地利用变化。
Changes in forest cover affect the local climate by modulating the land-atmosphere fluxes of energy and water. The magnitude of this biophysical effect is still debated in the scientific community and currently ignored in climate treaties. Here we present an observation-driven assessment of the climate impacts of recent forest losses and gains, based on Earth observations of global forest cover and land surface temperatures. Our results show that forest losses amplify the diurnal temperature variation and increase the mean and maximum air temperature, with the largest signal in arid zones, followed by temperate, tropical, and boreal zones. In the decade 2003-2012, variations of forest cover generated a mean biophysical warming on land corresponding to about 18% of the global biogeochemical signal due to CO2 emission from land-use change.