METHANE AND CARBON DIOXIDE EVOLUTION FROM SUBARCTIC FENS
METHANE AND CARBON DIOXIDE EVOLUTION FROM SUBARCTIC FENS
复制标题
亚北极沼泽的甲烷和二氧化碳演化
DOI：
10.4141/cjss87-007
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发表时间：
1987
影响因子：
1.7
通讯作者：
R. Knowles
中科院分区：
文献类型：
--
作者：
T. Moore;R. Knowles
四个亚北极沼泽在一个夏季的甲烷和二氧化碳净释放速率范围为0至7 mmol CH 4 m−2 d−1和2至29 mmol CO2 m − 2 d−1。 二氧化碳与甲烷的平均摩尔比范围为3至10。部分原因是由于演化速率的高度空间变异性，二氧化碳对温度的依赖性较弱，但甲烷的依赖性较强，在两个地点具有显著（P <0.05）的正相关性，尤其是与泥炭温度的相关性。 甲烷的年通量估计为0.1-0.6 g C m−2，虽然与其他湿地相比较低，但当考虑到亚北极泥炭地所占据的大面积时，它成为大气的重要贡献。 关键词：甲烷，二氧化碳，泥炭地，沼泽
Rates of net methane and carbon dioxide evolution from four subarctic fens over one summer ranged from 0 to 7 mmol CH4 m−2 d−1 and from 2 to 29 mmol CO2 m2 d−1. Average molar ratios of carbon dioxide to methane ranged from 3 to 10. Partially because of the high spatial variability in evolution rates, the temperature dependence of carbon dioxide was weak, but stronger for methane, with significant (P < 0.05) positive correlations at two sites, especially with peat temperatures. Annual flux of methane is estimated to be 0.1–0.6 g C m−2 which, although low compared to other wetlands, becomes a substantial atmospheric contribution when the large area occupied by subarctic peatlands is taken into account. Key words: Methane, carbon dioxide, peatlands, fens