Collaborative research: Geophysical evaluation of biogenic gasses in peatlands

合作研究：泥炭地生物气的地球物理评价

• 批准号: 0510370
• 负责人: Lee Slater
• 金额: --
• 依托单位: Rutgers University New Brunswick
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-09-15 至 2010-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0510370&HistoricalAwards=false
• 关键词: Collaborative; research; Geophysical; evaluation; biogenic

0510370 0510545 0510004Slater Glaser ReeveBiogenic gas emission from northern peatlands, by wicking from vascular plants and byepisodic ebullition events, accounts for approximately 7% of the global annual emissionof methane to the atmosphere. This proposal involves experiments to apply groundpenetrating radar (GPR) for (1) estimating the amount of biogenic gas stored in peatlands,(2) determining the spatial distribution of biogenic gas within the peat, and (3)monitoring biogenic gas release to the atmosphere. Data from a large northern peatland inMaine (EAR-0242353) show that (1) higher CH4 and CO2 concentrations correlate withhigh velocity/high attenuation zones in cross-borehole GPR data as well as shadow zones(loss of reflections) in surface GPR data, (2) shadow zones (indicative of high gascontent) are frequently observed in the +11 km of surface GPR data collected in thispeatland. The experimental objectives are: (1) a laboratory evaluation of the relationshipbetween dielectric permittivity and gas content for a profile of peat cores from the surfaceto the mineral soil; (2) a cross-hole GPR and surface GPR monitoring experiment,supported by measurements of water levels, hydraulic conductivity and time domainreflectometry, to observe rates of biogenic gas release to the atmosphere; (3) a surfaceGPR study, supported by in situ measurements of biogenic gas concentration, to estimatethe volume of biogenic gas stored in two well studied northern peatlands (Caribou Bog,ME and Glacial Lake Agassiz, MN). Important milestones include (a) a predictiveequation for gas content estimation in peat as a function of depth from dielectricpermittivity measurements, (b) new insight into the temporal pattern of gas release andebullition flux from peatlands, and (c) new estimates of the free gas content of peatlandcarbon reservoirs accounting for the spatial/depth distribution of the gas.Broader ImpactsThis proposal incorporates educational activities, curriculum development, communityoutreach and international collaboration within an applied research framework. HonorsUnderGraduate (HUG) researchers from the Rutgers-Newark Honors College (HC) willpartner with a postdoctoral scientist to obtain the research training required to completefour of the primary research tasks. Each HUG will complete a yearlong senior project ontheir research and contribute to a publication. The status of Rutgers-Newark as the toprankedNational US University with respect to campus UG diversity facilitates HUGopportunities to minority students. Students in Earth/Environmental Sciences at Rutgers-Newark frequently express interest in fieldwork experiences. Part of the fieldwork will beconducted by students participating in a new class, Summer Field Camp in AppliedGeophysics, developed as part of this project. Community outreach will occur via guidedtours, poster boards and presentations on the hydrology, ecology and carbon cycle inCaribou Bog, facilitated by the recently opened 2 km long Orono boardwalk that nowprovides public access to this bog. Finally, collaboration with a prominent peatlandscientist in Europe will draw international attention to our work and provide anopportunity to conduct comparative work on a unique European peat bog.

0510370 0510545 0510004S -SLATER GLASER REEVEBIOGON气体从北部泥炭地发射，通过血管植物的芯吸芯和散发性的戒断事件，约占甲烷每年甲烷年度排放的7％的大约7％。该建议涉及实验以（1）估计泥炭地储存的生物气体量的实验，（2）确定泥炭中生物气体的空间分布，以及（3）监测生物气体释放到大气中。 Data from a large northern peatland inMaine (EAR-0242353) show that (1) higher CH4 and CO2 concentrations correlate withhigh velocity/high attenuation zones in cross-borehole GPR data as well as shadow zones(loss of reflections) in surface GPR data, (2) shadow zones (indicative of high gascontent) are frequently observed in the +11 km of surface GPR data collected in Thispeatland。实验目标是：（1）对介电介电常数和气体含量之间关系的实验室评估，以从矿物质土壤表面上产生泥炭核的特征； （2）由水位，液压电导率和时域反射测量测量的跨孔GPR和表面GPR监测实验，以观察到生物气体释放到大气中的速率； （3）一项SurfaceGPR研究，由生物气体浓度的原位测量支持，以估计在两个研究的北部泥炭地（Caribou Bog，ME，ME和Glacial Lake Agassiz，MN）中存储的生物气体量。 Important milestones include (a) a predictiveequation for gas content estimation in peat as a function of depth from dielectricpermittivity measurements, (b) new insight into the temporal pattern of gas release andebullition flux from peatlands, and (c) new estimates of the free gas content of peatlandcarbon reservoirs accounting for the spatial/depth distribution of the gas.Broader ImpactsThis proposal incorporates在应用研究框架内的教育活动，课程开发，社区库雷奇和国际合作。 Rutgers-Newark Honors College（HC）WillPartner的Honorsundergradute（Hug）研究人员与博士后科学家一起获得完成主要研究任务所需的研究培训。每个拥抱都将完成为期一年的研究，并为出版物做出贡献。罗格斯·纳瓦克（Rutgers-Newark）作为校园UG多样性的美国高级大学的地位促进了少数民族学生的Hugopportunition。罗特·纳瓦克（Rutgers-Newark）的地球/环境科学的学生经常对现场工作体验表示兴趣。作为该项目的一部分开发的新课程，Appliedgeophysics的夏季夏令营的学生将为野外工作的一部分。社区外展活动将通过导游，海报委员会以及有关水文学，生态和碳循环incaribou bog的演讲，这是由最近开放的2公里长的Orono木板路促进的，现在可以公开访问该沼泽。最后，与欧洲著名的泥炭地学家的合作将吸引国际关注我们的作品，并提供对独特的欧洲泥炭沼泽进行比较工作的肛门运动。