Although wetlands are the largest natural source of atmospheric methane, the amount and variability of methane emissions from wetlands still have large uncertainty. We investigated the local growth rate of the column-averaged methane dry air mole fraction (XCH₄) in Siberia where wetlands are widely abundant using 11-year (2009-2019) Greenhouse gases Observing SATellite (GOSAT) data. While the mean growth rate during the summer from the GOSAT observations is 7.2 ppb yr⁻¹ globally, that in West Siberia is 8.4 ppb yr⁻¹. In particular, the growth rates in West Siberia after 2013 is much larger in July and August than in the other months. Moreover, the growth of XCH₄ in West Siberia appears to larger than in the other boreal areas. These results imply that methane emissions from wetlands in West Siberia increased during the summer in recent several years.

尽管湿地是大气中甲烷的最大自然来源，但湿地甲烷排放的数量和变异性仍存在很大不确定性。我们使用11年（2009-2019）温室气体观测卫星（GOSAT）数据，调查了湿地广泛丰富的西伯利亚的平均甲烷干燥空气摩尔分数（XCH ₄）的局部增长率。根据GOSAT观测，夏季全球平均增长率为7.2 ppb yr ^-1，而西西伯利亚的平均增长率为8.4 ppb yr ^-1。特别是，2013年之后西西伯利亚的增长率在7月和8月比其他几个月要大得多。此外，XCH ₄的增长西西伯利亚地区的面积似乎比其他北方地区大。这些结果表明，西西伯利亚湿地的甲烷排放在最近几年的夏季有所增加。