Methane emissions from wetland soils in Southwest-Germany
Methane emissions from wetland soils in Southwest-Germany
复制标题
德国西南部湿地土壤的甲烷排放
DOI：
--
复制
发表时间：
2002
期刊：
影响因子：
--
通讯作者：
S. Fiedler
中科院分区：
文献类型：
--
作者：
M. Sommer;S. Fiedler
1996年7月至1998年7月，对德国南部6个湿地土壤甲烷通量的时空变化进行了研究。我们研究的目的是：(i)验证甲烷排放量是否随地下水位和地貌单元的不同而一致变化的假设，（ii）证明在全球范围内，温带湿润气候的湿地土壤中存在大量的甲烷排放。这些湿地土壤CH4的日排放量为0 ~ 85 mg CH4 m-2 -1（中位数），年累积排放量相差两个数量级（0 ~ 73 g CH4 m-2）。CH4排放与地下水位和Eh均呈非线性相关。后两个变量都与土壤形态和分类密切相关。我们建议土壤图可用于陆地生态系统ch4通量的面积计算。
The spatial and temporal variability of methane flux was investigated in six wetland soils in southern Germany from July 1996 to July 1998. The objectives of our study were (i) to test the hypothesis if CH4 emissions vary consistently with differences in groundwater level and geomorphic units, (ii) to demonstrate that there is, on a global scale, substantial CH4 emission from wetland soils in temperate-humid climates. Daily emissions of CH4 in these wetland soils ranged from 0 to 85 mg CH4 m-2d-1 (medians), and cumulative yearly emissions differed by two orders of magnitude (0 to 73 g CH4 m-2). There was a non-linear correlation between CH4 emission and both groundwater level and Eh. Both of the latter variables were very well related to soil morphology and classification. We recommended that soil maps may be used for area calculations of the CH4-fluxes from terrestrial ecosystems.