Collaborative Research: New insights into the Holocene methane budget from dual isotope systematics and a high resolution record of the interpolar gradient

这是由俄勒冈州立大学和宾夕法尼亚州立大学的主要研究人员合作提出的一项建议。在这个项目中，他们将评估全新世大气甲烷负荷的趋势、机制和来源。他们的方法将包括对先前从格陵兰岛恢复的冰芯进行详细采样，并进行模拟实验，以记录全新世以及全新世早期、8.2 ka事件、过去5000年（一个提出的人为输入的时期）和过去200年等关键时期的长期趋势。利用特定的甲烷同位素、建模和极地间梯度随时间的比较，可以更准确地确定极地冰芯中存档的大气甲烷浓度的来源和原因。这种对极间甲烷梯度的进一步分析，可能是由北半球更大的来源控制的，预计将揭示全新世甲烷来源的变化。

Abstract for 0520523This is a collaborative proposal by Principal Investigators from the Oregon State University and Pennsylvania State University. During this project, they will evaluate trends, mechanisms and sources of atmospheric methane loading through the Holocene. Their approach will include a detailed sampling of previously recovered ice cores from Greenland and modeling experiments to document long-term trends in the Holocene as well as during critical periods such as the early Holocene, the 8.2 ka event, the last 5,000 years (a period of proposed anthropogenic input), and the last 200 years. The use of specific methane isotopes, modeling, and comparison of interpolar gradients through time will allow more accurate determination of sources and causes of atmospheric methane concentrations archived in polar ice cores. This further analysis of the interpolar methane gradient, presumably controlled by larger northern hemisphere sources, is anticipated to shed light on changing methane sources through the Holocene.