Methane has a short atmospheric lifetime compared to carbon dioxide (CO2), ∼decade versus ∼centuries, but it has a much higher global warming potential (GWP), highlighting how reducing methane emissions can slow the rate of climate change. When considering the contribution of greenhouse gas (GHG) emissions to current global warming (2010–2019) relative to the industrial revolution (1850–1900) levels, methane contributes 0.5 °C or ∼ a third of the total. The most recent post-2023 global estimates of methane emissions by bottom-up (BU) and top-down (TD) approaches for the coal mining sector are in the range of ∼41 ± 3 Tg yr−1 and 33 ± 5 Tg yr−1, respectively. This divergence, notwithstanding overlapping confidence intervals, is a result of differences between applied TD global inversion models and BU emission inventories. Further research can help to better refine emissions from the various contributing coal mine methane (CMM) emissions sources. The coal mining sector accounts for over 10 % of global anthropogenic methane emissions. The contribution of CMM emissions to the global budget have increased since 2000, although upward and downward regional trends have been observed.

中文翻译：

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通过减少煤矿甲烷来缓解气候变化：对现状和机遇的批判性审查


与二氧化碳 （CO2） 相比，甲烷在大气中的寿命较短，约为 10 年对 10 年，但其全球变暖潜能值 （GWP） 要高得多，这凸显了减少甲烷排放如何减缓气候变化的速度。考虑到温室气体 （GHG） 排放对当前全球变暖（2010-2019 年）相对于工业革命（1850-1900 年）水平的贡献，甲烷贡献了 0.5 °C 或约占总量的三分之一。2023 年后，通过自下而上 （BU） 和自上而下 （TD） 方法对煤矿开采部门甲烷排放量的最新估计分别在 ∼41 ± 3 Tg yr-1 和 33 ± 5 Tg yr-1 的范围内。尽管置信区间重叠，但这种差异是应用的 TD 全球反演模型和 BU 排放清单之间存在差异的结果。进一步的研究有助于更好地改进各种煤矿甲烷 （CMM） 排放源的排放。煤矿开采部门占全球人为甲烷排放量的 10% 以上。自 2000 年以来，CMM 排放量对全球预算的贡献有所增加，尽管观察到区域呈上升和下降趋势。