Cold season CH4, CO2 and N2O fluxes from freshwater marshes in northeast China

被引：70

作者：

Zhang, JB ^{[1
]}

Song, CC ^{[1
]}

Yang, WY ^{[1
]}

机构：

[1] Chinese Acad Sci, NE Inst Geog & Agr Ecol, Changchun 130012, Jilin, Peoples R China

来源：

CHEMOSPHERE | 2005年 / 59卷 / 11期

基金：

中国国家自然科学基金;

关键词：

cold season; carbon dioxide; methane; nitrous oxide; northeast China;

D O I：

10.1016/j.chemosphere.2004.11.051

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Cold season (winter and thaw) CH4, CO2 and N2O fluxes from freshwater marshes (47 degrees 35'N, 133 degrees 31'E, Northeast China) were measured, using the static chamber method. The mean CH4 and CO2 fluxes from Carex lasiocarpa (CI) were 0.5 +/- 0.19 and 6.23 +/- 1.36 mgCm(-2) h(-1), respectively, and those from Deyeuxia angustifoli (Da) were 0.18 +/- 0.15 and 5.22 +/- 2.48 ing Cm-2 h(-1), respectively in winter. There was no significant difference between CI and Da (p > 0.05). The contributions of winter CH4 fluxes were about 5.5% and 3% in the Cl and Da, respectively. Marshes are an important potential N2O sink in winter season in northeast China. During thaw, the CH4 and CO2 emissions rapidly increased, 4.5-6 times of winter emissions. Wetland became a source of N2O. Cold season gases flux from northern wetlands play an important role in the seasonal gas exchange. (c) 2004 Elsevier Ltd. All rights reserved.

引用

页码：1703 / 1705

页数：3

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