Supersaturation and evasion of CO2 and CH4 in surface waters at Mer Bleue peatland, Canada

被引：107

作者：

Billett, M. F. ^{[1
]}

Moore, T. R. ^{[2
,3
]}

机构：

[1] Ctr Ecol & Hydrol, Edinburgh Res Stn, Penicuik EH26 0QB, Midlothian, Scotland

[2] McGill Univ, Dept Geog & Global Environm, Montreal, PQ H3A 2K6, Canada

[3] McGill Univ, Climate Change Ctr, Montreal, PQ H3A 2K6, Canada

来源：

HYDROLOGICAL PROCESSES | 2008年 / 22卷 / 12期

基金：

英国自然环境研究理事会;

关键词：

peatland; evasion; carbon dioxide; methane; supersaturation; DOC;

D O I：

10.1002/hyp.6805

中图分类号：

TV21 [水资源调查与水利规划];

学科分类号：

081501 ;

摘要：

Carbon dioxide (CO2) and methane (CH4) concentrations and evasion rates were measured in surface waters draining Mer Bleue peatland (Ontario, Canada) between spring and autumn 2005. All sites exhibit a consistent pattern of supersaturation throughout the year, which is broadly related to hydrological and temperature changes between spring snowmelt and autumn freezing. Both measurements and estimates of CO2 and CH4 evasion from open water to the atmosphere suggest that parts of the catchment (including beaver dams) are significant degassing hot spots. We present data showing how vertical gaseous carbon fluxes compare with lateral carbon fluxes and make an initial estimate of the importance to the overall carbon budget of CO2 and CH4 evasion to the atmosphere from water surfaces at Mer Bleue. Copyright (C) 2007 John Wiley & Sons, Ltd.

引用

页码：2044 / 2054

页数：11