环境科学
生物量(生态学)
森林砍伐(计算机科学)
气候变化
土地利用
减缓气候变化
农林复合经营
温带气候
固碳
温室气体
土地利用、土地利用的变化和林业
土地覆盖
植被(病理学)
生态学
生物
病理
程序设计语言
医学
二氧化碳
计算机科学
作者
Karl‐Heinz Erb,Thomas Kästner,Christoph Plutzar,Anna Liza S. Bais,Nuno Carvalhais,Tamara Fetzel,Simone Gingrich,Helmut Haberl,Christian Lauk,Maria Niedertscheider,Julia Pongratz,Martin Thurner,Sebastiaan Luyssaert
出处
期刊:Nature
[Springer Nature]
日期:2017-12-20
卷期号:553 (7686): 73-76
被引量:544
摘要
Carbon stocks in vegetation have a key role in the climate system. However, the magnitude, patterns and uncertainties of carbon stocks and the effect of land use on the stocks remain poorly quantified. Here we show, using state-of-the-art datasets, that vegetation currently stores around 450 petagrams of carbon. In the hypothetical absence of land use, potential vegetation would store around 916 petagrams of carbon, under current climate conditions. This difference highlights the massive effect of land use on biomass stocks. Deforestation and other land-cover changes are responsible for 53-58% of the difference between current and potential biomass stocks. Land management effects (the biomass stock changes induced by land use within the same land cover) contribute 42-47%, but have been underestimated in the literature. Therefore, avoiding deforestation is necessary but not sufficient for mitigation of climate change. Our results imply that trade-offs exist between conserving carbon stocks on managed land and raising the contribution of biomass to raw material and energy supply for the mitigation of climate change. Efforts to raise biomass stocks are currently verifiable only in temperate forests, where their potential is limited. By contrast, large uncertainties hinder verification in the tropical forest, where the largest potential is located, pointing to challenges for the upcoming stocktaking exercises under the Paris agreement.
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