气候变化领域集成服务门户(CCPortal): Age model of firn core DML05C98

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.686038
	Age model of firn core DML05C98_32 (B32)
	Traufetter; Fidan; Fischer; Hubertus
发布日期	2008-03-10
数据集类型	dataset
英文简介	In the framework of the European Project for Ice Coring in Antarctica (EPICA), a comprehensive glaciological pre-site survey has been carried out on Amundsenisen, Dronning Maud Land, East Antarctica, in the past decade. Within this survey, four intermediate-depth ice cores and 13 snow pits were analyzed for their ionic composition and interpreted with respect to the spatial and temporal variability of volcanic sulphate deposition. The comparison of the non-sea-salt (nss)-sulphate peaks that are related to the well-known eruptions of Pinatubo and Cerro Hudson in AD 1991 revealed sulphate depositions of comparable size (15.8 ± 3.4 kg/km**2) in 11 snow pits. There is a tendency to higher annual concentrations for smaller snow-accumulation rates. The combination of seasonal sodium and annually resolved nss-sulphate records allowed the establishment of a time-scale derived by annual-layer counting over the last 2000 years and thus a detailed chronology of annual volcanic sulphate deposition. Using a robust outlier detection algorithm, 49 volcanic eruptions were identified between AD 165 and 1997. The dating uncertainty is ±3 years between AD 1997 and 1601, around ±5 years between AD 1601 and 1257, and increasing to ±24 years at AD 165, improving the accuracy of the volcanic chronology during the penultimate millennium considerably.
空间范围	Latitude: -75.002333 * Longitude: 0.007000
时间范围	1997-12-25T00:00:00 - 1997-12-25T00:00:00
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/213928
推荐引用方式 GB/T 7714	Traufetter,Fidan,Fischer,et al. Age model of firn core DML05C98_32 (B32).2008-03-10.https://doi.org/10.1594/PANGAEA.686038.