Methane flux: Water table relations in northern wetlands
文献类型：期刊论文
| 作者 | T. R. Moore ; N. T. Roulet |
| 刊名 | GEOPHYSICAL RESEARCH LETTERS
 |
| 出版日期 | 1993 |
| 卷号 | 20期号:7页码:587 |
| 关键词 | Geochemical cycles Hydrologic budget North America Biosphere-atmosphere interactions |
| 中文摘要 | Water table position, through the creation of aerobic and anaerobic conditions in the soil profile, plays an important role in controlling CH4 flux from wetlands. A laboratory study of peat columns revealed that CH4emission rates initially increased and then decreased as the water table was lowered from the peat surface to a depth of 50 cm, with the release of CH4 trapped in pores. There was a strong hysteresis between CH4 flux on the falling and rising water table limbs (falling > rising). When expressed as seasonal average values, there was a strong relationship (r² 0.08 – 0.74) between log CH4 flux and water table position for sites within 5 wetland regions in boreal‐subarctic Canada. The regression coefficients were similar among regions (0.022 – 0.037), but there were differences in the regression constants (0.47 – 1.89). CH4 flux from drained, forested peatland soils decreased as the water table depth increased, and several sites were transformed from sources to sinks of CH4. Global CH4 emissions to the atmosphere may have been reduced by ≈ 1 Tg yr−1 by peatland drainage during the last 100 yr. |
| 学科主题 | Geochemistry |
| 语种 | 英语 |
| 公开日期 | 2012-10-29 |
| 源URL | [http://ir.yic.ac.cn/handle/133337/5689]  |
| 专题 | 烟台海岸带研究所_科研共享资源 |
| 推荐引用方式 GB/T 7714 | T. R. Moore,N. T. Roulet. Methane flux: Water table relations in northern wetlands[J]. GEOPHYSICAL RESEARCH LETTERS,1993,20(7):587. |
| APA | T. R. Moore,&N. T. Roulet.(1993).Methane flux: Water table relations in northern wetlands.GEOPHYSICAL RESEARCH LETTERS,20(7),587. |
| MLA | T. R. Moore,et al."Methane flux: Water table relations in northern wetlands".GEOPHYSICAL RESEARCH LETTERS 20.7(1993):587. |
入库方式： OAI收割
来源：烟台海岸带研究所
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