Methane dynamics of Eurasian peatlands: Environmental controls on linear and non-linear pathways of CH4 emissions

欧亚泥炭地的甲烷动态：CH4 排放线性和非线性路径的环境控制

• 批准号: 24797238
• 负责人: Professor Dr. Martin Wilmking, Ph.D.
• 金额: --
• 依托单位: Arbeitsgruppe Landschaftsökologie und Ökosystemdynamik
• 依托单位国家: 德国
• 项目类别: Independent Junior Research Groups
• 财政年份: 2007
• 资助国家: 德国
• 起止时间: 2006-12-31 至 2013-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/24797238?language=en
• 关键词: Methane; dynamics; Eurasian; peatlands; Environmental

Eurasian peatlands are important sources of the greenhouse gas CH4 to the atmosphere, but no long-term, continuous observations of the spatial and temporal variation in CH4 emissions in these peatlands exist. Here we propose to narrow this knowledge gap by building a network of four sites along a maritime-continental transect spanning from Finland to the largest peatlands on earth in Western Siberia. At each site we will 1) combine chamber measurements and eddy covariance towers to quantify the importance of each pathway of emission (diffusion, plant mediated, ebullition/bubbling); 2) scale plot based results up using high resolution kite and zeppelin aerial photography and IKONOS imagery; 3) use stable isotopes and surface level recorders to quantify the importance of deep ebullition events. This novel set-up of methods combined with the spatial extent of the investigation area promises a comprehensive analysis of the spatial and temporal variation in CH4 emissions in Eurasia. Innovative aspects include: Measurement of annual CH4 fluxes, quantification of ebullition and geographical coverage in areas with nearly no history of flux measurements.

欧亚泥炭地是大气中温室气体CH 4的重要来源，但这些泥炭地CH 4排放的空间和时间变化没有长期的，连续的观测。在这里，我们建议通过建立一个网络的四个站点沿着从芬兰到地球上最大的泥炭地在西伯利亚西部的海洋-大陆样带缩小这一知识差距。在每个站点，我们将1）结合联合收割机室测量和涡度协方差塔，以量化每个排放途径（扩散、植物介导、沸腾/冒泡）的重要性; 2）使用高分辨率风筝和齐柏林飞艇航空摄影和IKONOS图像，基于比例图的结果; 3）使用稳定同位素和表面水平记录仪来量化深层沸腾事件的重要性。这种新的设置相结合的调查区域的空间范围的方法，承诺在欧亚大陆的CH 4排放的时空变化的全面分析。创新方面包括：在几乎没有流量测量历史的地区测量年度CH 4通量、沸腾量化和地理覆盖范围。

项目成果

Overestimation of CO2 respiration fluxes by the closed chamber method in low‐turbulence nighttime conditions

低湍流夜间条件下闭室法高估 CO2 呼吸通量

• DOI: 10.1029/2008jg000909
• 发表时间: 2009
• 期刊: Journal of Geophysical Research
• 作者: Schneider;Kutzbach;Schulz;M. Wilmking
• 通讯作者: M. Wilmking

Evapotranspiration dynamics in a boreal peatland and its impact on the water and energy balance

• DOI: 10.1029/2009jg001075
• 发表时间: 2010-12
• 期刊: Journal of Geophysical Research
• 作者: Jiabing Wu;Jiabing Wu;L. Kutzbach;L. Kutzbach;D. F. Jager;C. Wille;C. Wille;M. Wilmking

The influence of summer seasonal extremes on dissolved organic carbon export from a boreal peatland catchment: evidence from one dry and one wet growing season.

• DOI: 10.1016/j.scitotenv.2008.10.005
• 发表时间: 2009-02
• 期刊: The Science of the total environment
• 作者: D. F. Jager;M. Wilmking;J. Kukkonen

The surface energy balance and its drivers in a boreal peatland fen of northwestern Russia

• DOI: 10.1016/j.jhydrol.2014.01.056
• 发表时间: 2014-04
• 期刊: Journal of Hydrology
• 影响因子: 6.4
• 作者: B. Runkle;C. Wille;M. Gažovič;M. Wilmking;L. Kutzbach

Cross-evaluation of measurements of peatland methane emissions on microform and ecosystem scales using high-resolution landcover classification and source weight modelling

• DOI: 10.1016/j.agrformet.2011.02.006
• 发表时间: 2011-07-15
• 期刊: AGRICULTURAL AND FOREST METEOROLOGY
• 影响因子: 6.2
• 作者: Forbrich, Inke;Kutzbach, Lars;Wilmking, Martin
• 通讯作者: Wilmking, Martin