论文标题
森林退化造成的碳损失超出了巴西亚马逊森林砍伐
Carbon loss from forest degradation exceeds that from deforestation in the Brazilian Amazon
论文作者
论文摘要
地上生物量（AGB）和森林地区的时空动力学影响巴西亚马逊的碳循环，气候和生物多样性。在这里，我们通过分析基于卫星的年度AGB和森林区域数据集研究了AGB和森林地区的年度变化。我们发现，2019年的森林地区损失比2015年大的损失大，这可能是由于最近放松了森林保护政策。然而，2019年净AGB的损失比2015年小三倍。在2010年至2019年期间，巴西亚马逊的总累积损失为4.45 pg c，而总收益为3.78 pg c，净AGB损失了0.67 pg C. C. C. C. C.森林降解（73％）的损失（73％）比Deforage（73％）损失了（27％），而Deforatiation（27％）的损失（27％）损失了。超过森林砍伐。这表明森林退化已成为驱动碳损失的最大过程，并应成为更高的政策优先事项。
Spatial-temporal dynamics of aboveground biomass (AGB) and forest area affect the carbon cycle, climate, and biodiversity in the Brazilian Amazon. Here we investigate inter-annual changes of AGB and forest area by analyzing satellite-based annual AGB and forest area datasets. We found the gross forest area loss was larger in 2019 than in 2015, possibly due to recent loosening of forest protection policies. However, net AGB loss was three times smaller in 2019 than in 2015. During 2010-2019, the Brazilian Amazon had a cumulative gross loss of 4.45 Pg C against a gross gain of 3.78 Pg C, resulting in net AGB loss of 0.67 Pg C. Forest degradation (73%) contributed three times more to the gross AGB loss than deforestation (27%), given that the areal extent of degradation exceeds deforestation. This indicates that forest degradation has become the largest process driving carbon loss and should become a higher policy priority.
