Recent increases in terrestrial carbon uptake at little cost to the water cycle.
Recent increases in terrestrial carbon uptake at little cost to the water cycle.
复制标题
DOI：
10.1038/s41467-017-00114-5
复制
发表时间：
2017-07-24
影响因子：
16.6
通讯作者：
Zhang Y
中科院分区：
文献类型：
--
作者：
Cheng L;Zhang L;Wang YP;Canadell JG;Chiew FHS;Beringer J;Li L;Miralles DG;Piao S;Zhang Y
量化耦合的碳和水循环对当前全球变暖和大气CO2浓度上升的响应对于预测和适应气候变化至关重要。在这里，我们表明，陆地碳吸收（即总初级生产）显着增加，从1982年到2011年使用地面和遥感土地和大气观测相结合。重要的是，我们发现陆地碳吸收的增加并不伴随着水资源利用（即蒸散）的成比例增加，而是在很大程度上（约90%）由每单位水资源利用（即水资源利用效率）的碳吸收增加所驱动。水分利用效率的提高与CO2浓度的升高和冠层叶面积指数的增加呈正相关，与水汽压亏缺的增加呈负相关。我们的研究结果表明，大气CO2浓度的上升引起了陆地水经济的碳吸收的转变。耦合的碳和水循环对人为气候变化的响应尚不清楚。在这里，作者表明，从1982年到2011年，陆地碳吸收量显着增加，这种增加主要是由水利用效率的提高而不是用水量的增加所驱动的。
Quantifying the responses of the coupled carbon and water cycles to current global warming and rising atmospheric CO2 concentration is crucial for predicting and adapting to climate changes. Here we show that terrestrial carbon uptake (i.e. gross primary production) increased significantly from 1982 to 2011 using a combination of ground-based and remotely sensed land and atmospheric observations. Importantly, we find that the terrestrial carbon uptake increase is not accompanied by a proportional increase in water use (i.e. evapotranspiration) but is largely (about 90%) driven by increased carbon uptake per unit of water use, i.e. water use efficiency. The increased water use efficiency is positively related to rising CO2 concentration and increased canopy leaf area index, and negatively influenced by increased vapour pressure deficits. Our findings suggest that rising atmospheric CO2 concentration has caused a shift in terrestrial water economics of carbon uptake. The response of the coupled carbon and water cycles to anthropogenic climate change is unclear. Here, the authors show that terrestrial carbon uptake increased significantly from 1982 to 2011 and that this increase is largely driven by increased water-use efficiency, rather than an increase in water use.
登录
查看更多内容
影响因子：
56.9
作者：
Beer, Christian;Reichstein, Markus;Papale, Dario
通讯作者：
Papale, Dario
影响因子：
4.9
作者：
Friedlingstein, Pierre;Meinshausen, Malte;Knutti, Reto
通讯作者：
Knutti, Reto
影响因子：
7.3
作者：
FIELD, CB;JACKSON, RB;MOONEY, HA
通讯作者：
MOONEY, HA
影响因子：
64.8
作者：
Gedney, N;Cox, PM;Stott, PA
通讯作者：
Stott, PA
影响因子：
4.9
作者：
Arora, Vivek K.;Boer, George J.;Wu, Tongwen
通讯作者：
Wu, Tongwen