Land use-driven historical soil carbon losses in Swiss peatlands
Land use-driven historical soil carbon losses in Swiss peatlands
复制标题
瑞士泥炭地土地利用驱动的历史土壤碳损失
作者：
Chloé Wüst;A. Grünig;J. Leifeld
背景 在全球范围内，泥炭地的集约利用极大地增加了温室气体排放。过去几个世纪里，泥炭地利用的集约化导致碳（C）损失增加，但如果没有历史排放数据，这些增加和累积排放量很难量化。目标 了解瑞士泥炭地排水随时间推移造成的土壤碳损失的程度和发展情况，并将当今泥炭地的状况与这一历史发展联系起来。方法 使用历史记录和已发表的泥炭地范围估计值来估计泥炭地的原始范围和碳库，并了解泥炭地历史使用的趋势。应用特定土地用途的排放因子来估算过去 300 年通过排水产生的碳排放量。结果约。瑞士已有 15 至 55 座 C 山因泥炭地排水而消失。尽管有机土壤面积有所减少，但由于有机土壤的使用集约化，特别是在农业方面，每年的碳排放量却大幅增加，特别是自二十世纪中叶以来。这种碳损失比提取泥炭损失的碳要大得多。剩余的 C 股票大约相当于过去 300 年损失的股票。结论 瑞士泥炭地表面损失速度是欧洲湿地的典型情况。排放因子的不确定性仍然很高，应加以改进以证明任何缓解策略的合理性。尽管瑞士不再开采泥炭，但只要排水网络的影响及其当前的使用强度持续存在，未来泥炭地的碳排放量就会保持在很高水平。
Context Globally, the intensive use of peatlands contributes substantially to greenhouse gas emissions. The intensification of peatland use has led to increasing carbon (C) losses over the last centuries, but without historical emissions data, these increases and cumulative emissions are difficult to quantify. Objectives To understand the magnitude and development of soil C losses through peatland drainage in Switzerland through time, and to relate the situation of peatlands today to this historical development. Methods Historical records and a published estimate of the peatland extent are used to estimate peatlands’ original extent and C stocks, and to understand trends in the historical use of peatlands. Land use-specific emission factors are applied to estimate the C emission through drainage over the last 300 years. Results Ca. 15 to 55 Mt C have been lost through peatland drainage in Switzerland. Despite a decrease in the area of organic soils, annual C emissions have increased considerably especially since the mid-twentieth century due to intensification of their use, particularly for agriculture. This C loss is a magnitude greater than that lost through extracted peat. Remaining C stocks approximate those lost over the last 300 years. Conclusions The rate of peatland surface loss in Switzerland is typical of European wetlands. Uncertainties in emission factors remain high and should be refined to justify any mitigation strategies. Although peat is no longer mined in Switzerland, future C emissions from peatlands will remain high as long as the effects of drainage networks and their current intensity of use persist.
影响因子：
4.9
作者：
Charman, D. J.;Beilman, D. W.;Zhao, Y.
通讯作者：
Zhao, Y.
影响因子：
2.4
作者：
Loisel, Julie;Yu, Zicheng;Zhou, Weijian
通讯作者：
Zhou, Weijian
影响因子：
5.2
作者：
Leifeld, Jens;Steffens, Markus;Galego-Sala, Angela
通讯作者：
Galego-Sala, Angela