Greenhouse Gas Emissions from Reservoir Water Surfaces: A New Global Synthesis
Greenhouse Gas Emissions from Reservoir Water Surfaces: A New Global Synthesis
复制标题
DOI：
10.1093/biosci/biw117
复制
发表时间：
2016-11-01
期刊：
影响因子：
10.1
通讯作者：
Vonk, J. Arie
中科院分区：
文献类型：
--
作者：
Deemer, Bridget R.;Harrison, John A.;Vonk, J. Arie
总的来说，水坝形成的水库被认为是大气中温室气体(GHGs)的重要来源。到目前为止，量化、建模和管理这些排放的努力受到数据可获得性和方法方法不一致的限制。在这里，我们综合了水库CH4、CO2和N2O的排放数据，主要有三个目标：(1)生成水库温室气体排放的全球估计，(2)确定这些排放的最佳预测因素，以及(3)考虑方法对排放估计的影响。我们估计，水库水面的温室气体排放量每年相当于0.8(0.5-1.2)pg二氧化碳当量，其中大部分强迫是由甲烷造成的。然后，我们讨论几种替代途径的可能性，例如大坝除气和下游排放，这些途径对总排放量的贡献很大。尽管以前的研究已经将水库温室气体排放与水库年龄和纬度联系起来，但我们发现与水库生产力相关的因素是更好的排放预测因子。
Collectively, reservoirs created by dams are thought to be an important source of greenhouse gases (GHGs) to the atmosphere. So far, efforts to quantify, model, and manage these emissions have been limited by data availability and inconsistencies in methodological approach. Here, we synthesize reservoir CH4, CO2, and N2O emission data with three main objectives: (1) to generate a global estimate of GHG emissions from reservoirs, (2) to identify the best predictors of these emissions, and (3) to consider the effect of methodology on emission estimates. We estimate that GHG emissions from reservoir water surfaces account for 0.8 (0.5-1.2) Pg CO2 equivalents per year, with the majority of this forcing due to CH4. We then discuss the potential for several alternative pathways such as dam degassing and downstream emissions to contribute significantly to overall emissions. Although prior studies have linked reservoir GHG emissions to reservoir age and latitude, we find that factors related to reservoir productivity are better predictors of emission.