Global-Gridded Daily Methane Emissions from Inland Dam-Reservoir Systems

This dataset includes global maps of methane (CH4) emissions from inland dam-reservoir systems at 0.25-degree spatial resolution. Daily emission rates (as grams of CH4 per day per total area of grid cell) were estimated for boreal, temperate, and subtropical-tropical eco-climatic domains and total emissions. The annual duration of the emission season is based on freeze-thaw cycles of these water bodies as applicable. In addition, the dataset includes the total fractional area of reservoirs in each grid cell. These estimates will promote understanding of the current and future role of reservoirs in the global CH4 budget and guide efforts to mitigate reservoir-related CH4 emissions. These emission estimates are climatological; one daily value for each day of year (n=365) is provided for each grid cell. Modeled estimates were based on daily mean inputs, averaged over 2002 to 2015.

本数据集涵盖全球内陆水库系统甲烷（CH4）排放的0.25度空间分辨率地图。针对寒带、温带以及亚热带-热带生态气候区域，以及对总排放量，日均排放速率（以每平方公里每日甲烷克数计）进行了估算。排放季节的年度时长基于这些水体冻结-融化周期。此外，数据集还包含了每个网格单元中水库的总面积分数。这些估算将有助于理解水库在全球甲烷预算中的当前及未来作用，并指导减轻与水库相关的甲烷排放的努力。这些排放估算属于气候学性质；为每年每一天（n=365）的每个网格单元提供了每日平均值；估算模型基于2002至2015年间的每日平均输入数据。