| DOI: | 10.5194/cp-8-1881-2012
|
| Scopus记录号: | 2-s2.0-84870218469
|
| 论文题名: | An automated approach for annual layer counting in ice cores |
| 作者: | Winstrup M.; Svensson A.M.; Rasmussen S.O.; Winther O.; Steig E.J.; Axelrod A.E.
|
| 刊名: | Climate of the Past
|
| ISSN: | 18149324
|
| 出版年: | 2012
|
| 卷: | 8, 期:6 | | 起始页码: | 1881
|
| 结束页码: | 1895
|
| 语种: | 英语
|
| Scopus关键词: | algorithm
; annual variation
; automation
; climate change
; data acquisition
; ice core
; paleoclimate
; statistical analysis
; timescale
; Arctic
; Greenland
|
| 英文摘要: | A novel method for automated annual layer counting in seasonally-resolved paleoclimate records has been developed. It relies on algorithms from the statistical framework of hidden Markov models (HMMs), which originally was developed for use in machine speech recognition. The strength of the layer detection algorithm lies in the way it is able to imitate the manual procedures for annual layer counting, while being based on statistical criteria for annual layer identification. The most likely positions of multiple layer boundaries in a section of ice core data are determined simultaneously, and a probabilistic uncertainty estimate of the resulting layer count is provided, ensuring an objective treatment of ambiguous layers in the data. Furthermore, multiple data series can be incorporated and used simultaneously. In this study, the automated layer counting algorithm has been applied to two ice core records from Greenland: one displaying a distinct annual signal and one which is more challenging. The algorithm shows high skill in reproducing the results from manual layer counts, and the resulting timescale compares well to absolute-dated volcanic marker horizons where these exist. © 2009 Author(s). |
| Citation statistics: |
|
| 资源类型: | 期刊论文
|
| 标识符: | http://119.78.100.158/handle/2HF3EXSE/49511
|
| Appears in Collections: | 气候变化与战略
|
|
There are no files associated with this item.
|
| Recommended Citation: | |
Winstrup M.,Svensson A.M.,Rasmussen S.O.,et al. An automated approach for annual layer counting in ice cores[J]. Climate of the Past,2012-01-01,8(6)
|
|
|