DOI: 10.5194/cp-12-103-2016
Scopus记录号: 2-s2.0-84956707986
论文题名: Variability of sulfate signal in ice core records based on five replicate cores
作者: Gautier E. ; Savarino J. ; Erbland J. ; Lanciki A. ; Possenti P.
刊名: Climate of the Past
ISSN: 18149324
出版年: 2016
卷: 12, 期: 1 起始页码: 103
结束页码: 113
语种: 英语
英文摘要: Current volcanic reconstructions based on ice core analysis have significantly improved over the past few decades by incorporating multiple-core analyses with a high temporal resolution from different parts of the polar regions into a composite common volcanic eruption record. Regional patterns of volcanic deposition are based on composite records, built from cores taken at both poles. However, in many cases only a single record at a given site is used for these reconstructions. This assumes that transport and regional meteorological patterns are the only source of the dispersion of the volcanic products. Here we evaluate the localscale variability of a sulfate profile in a low-accumulation site (Dome C, Antarctica), in order to assess the representativeness of one core for such a reconstruction. We evaluate the variability with depth, statistical occurrence, and sulfate flux deposition variability of volcanic eruptions detected in five ice cores, drilled 1m apart from each other. Local-scale variability, essentially attributed to snow drift and surface roughness at Dome C, can lead to a non-exhaustive record of volcanic events when a single core is used as the site reference, with a bulk probability of 30% of missing volcanic events and close to 65% uncertainty on one volcanic flux measurement (based on the standard deviation obtained from a five-core comparison). Averaging n records reduces the uncertainty of the deposited flux mean significantly (by a factor 1= p n); in the case of five cores, the uncertainty of the mean flux can therefore be reduced to 29 %. © 2016 Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49074
Appears in Collections: 气候变化与战略
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Recommended Citation:
Gautier E.,Savarino J.,Erbland J.,et al. Variability of sulfate signal in ice core records based on five replicate cores[J]. Climate of the Past,2016-01-01,12(1)