气候变化领域集成服务门户(CCPortal): Methane concentration and delta deuterium of methane from the NGRIP ice core

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.756715
	Methane concentration and delta deuterium of methane from the NGRIP ice core
	Bock; Michael; Schmitt; Jochen; Möller; Lars; Spahni; Renato; Blunier; Thomas; Fischer; Hubertus
发布日期	2010-02-01
数据集类型	dataset
英文简介	The causes of past changes in the global methane cycle and especially the role of marine methane hydrate (clathrate) destabilization events are a matter of debate. Here we present evidence from the North Greenland Ice Core Project ice core based on the hydrogen isotopic composition of methane [dD(CH4)] that clathrates did not cause atmospheric methane concentration to rise at the onset of Dansgaard-Oeschger (DO) events 7 and 8. Box modeling supports boreal wetland emissions as the most likely explanation for the interstadial increase. Moreover, our data show that dD(CH4) dropped 500 years before the onset of DO 8, with CH4 concentration rising only slightly. This can be explained by an early climate response of boreal wetlands, which carry the strongly depleted isotopic signature of high-latitude precipitation at that time.
空间范围	Latitude: 75.100000 * Longitude: -42.320000
时间范围	1996-07-01T00:00:00 - 1996-07-01T00:00:00
语种	英语
国家	国际
学科大类	气候变化
学科子类	冰冻圈
文献类型	数据集
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/213816
推荐引用方式 GB/T 7714	Bock,Michael,Schmitt,et al. Methane concentration and delta deuterium of methane from the NGRIP ice core.2010-02-01.https://doi.org/10.1594/PANGAEA.756715.