Reconstruction of annual accumulation rate on firn, synchronising H<sub>2</sub>O<sub>2</sub> concentration data with an estimated temperature record
-
Published:2021-07-27
Issue:7
Volume:15
Page:3495-3505
-
ISSN:1994-0424
-
Container-title:The Cryosphere
-
language:en
-
Short-container-title:The Cryosphere
Author:
Travassos Jandyr M., Martins Saulo S.ORCID, Potocki Mariusz, Simões Jefferson C.ORCID
Abstract
Abstract. This work deals with reconstructing firn layer thicknesses at the deposition time from the firn's observed thickness in ice cores, thus reconstructing the annual accumulation, yielding a timescale and an ice-core chronology. We employed a dynamic time warping algorithm to find an optimal, non-linear alignment between an H2O2 concentration data series from 98 m worth of ice cores of a borehole on the central ice divide of the Detroit Plateau, the Antarctic Peninsula, and an estimated local temperature time series. The viability and the physical reliability of the procedure are rooted in the robustness of the seasonal marker H2O2 in a high-accumulation context, which brought the entire borehole to within the operational life span of four Antarctic stations around the Antarctic Peninsula. The process was heavily based on numerical optimisation, producing a mathematically sound match between the two series to estimate the annual layering efficiently on the entire data section at once, being disposition-free. The results herein confirm a high annual accumulation rate of aN=2.8 m w.e./yr, which is of the same order of magnitude as and highly correlated with that of the Bruce Plateau and twice as large as that of the Gomez Plateau, 300 and 1200 km further south, respectively.
Funder
Instituto Nacional de Ciência e Tecnologia da Criosfera
Publisher
Copernicus GmbH
Subject
Earth-Surface Processes,Water Science and Technology
Reference39 articles.
1. Capron, E., Landais, A., Lemieux-Dudon, B., Schilt, A., Masson-Delmotte, V.,
Buiron, D., Chappellaz, J., Dahl-Jensen, D., Johnsen, S., Leuenberger, M.,
et al.: Synchronising EDML and NorthGRIP ice cores using δ18O of
atmospheric oxygen (δ18O atm) and CH4 measurements over MIS5
(80–123 kyr), Quaternary Sci. Rev., 29, 222–234, 2010. a 2. Chaovalitwongse, W. and Pardalos, P.: On the time series support vector machine
using dynamic time warping kernel for brain activity classification,
Cybern. Syst. Anal., 44, 125–138, 2008. a 3. Cleveland, W. S. and Grosse, E.: Computational methods for local regression,
Stat. Comput., 1, 47–62, 1991. a 4. Criel, J. and Tsiporkova, E.: Gene Time Expression Warper: a tool for
alignment, template matching and visualization of gene expression time
series, Bioinformatics, 22, 251–252, 2005. a 5. Cuffey, K. and Paterson, W.: The Physics of Glaciers, 4th edn., Academic Press, Elsevier, Burlington, MA 01803, USA, ISBN 9780123694614, 2010. a, b, c, d
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献
|
|