Reducing Emissions From Degraded Floodplain Wetlands

Toward a statistical description of methane emissions from arctic wetlands

Methane (CH4) emissions from arctic tundra typically follow relations with soil temperature and water table depth, but these process-based descriptions can be difficult to apply to areas where no measurements exist. We formulated a description of the broader temporal flux pattern in the growing season based on two distinct CH4 source components from slow and fast-turnover carbon. We used automa...

Methane emissions from two tundra wetlands in eastern Antarctica

During the summertime of 2005/2006 net methane ðCH4Þ fluxes and environmental variables were investigated in two tundra wetlands Wolong Marsh and Tuanjie Marsh of eastern Antarctica, using the closed chamber technique. At Wolong Marsh, the measurements were made at four wet tundra sites, four mesic tundra sites, and two dry sites. CH4 flux for wet tundra sites averaged 163:4mgm 2 h 1 and for th...

Modelling CH4 emissions from arctic wetlands: effects of hydrological parameterization

This study compares the CH4 fluxes from two arctic wetland sites of different annual temperatures during 2004 to 2006. The PEATLAND-VU model was used to simulate the emissions. The CH4 module of PEATLANDVU is based on the Walter-Heimann model. The first site is located in northeast Siberia, Indigirka lowlands, Kytalyk reserve (70 N, 147 E) in a continuous permafrost region with mean annual temp...

Global methane emissions from wetlands, rice paddies, and lakes

Mitigation of methane emissions from constructed farm wetlands.

Constructed wetlands are increasingly used for water pollution treatment but may also be sources of the greenhouse gas CH(4). The effect of addition of two potential inhibitors of methanogenesis - iron ochre and gypsum - on net CH(4) emissions was investigated in a constructed wetland treating farm runoff in Scotland, UK. CH(4) fluxes from three 15-m(2) wetland plots were measured between Janua...