Reconstruction of annual accumulation rate on firn, synchronising H2O2 concentration data with an estimated temperature record
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-l...
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fttriple:oai:gotriple.eu:oai:doaj.org/article:0db03e3bf44a4fe4b7acbbf28c836b1f 2023-05-15T13:56:01+02:00 Reconstruction of annual accumulation rate on firn, synchronising H2O2 concentration data with an estimated temperature record J. M. Travassos S. S. Martins M. Potocki J. C. Simões 2021-07-01 https://doi.org/10.5194/tc-15-3495-2021 https://tc.copernicus.org/articles/15/3495/2021/tc-15-3495-2021.pdf https://doaj.org/article/0db03e3bf44a4fe4b7acbbf28c836b1f en eng Copernicus Publications doi:10.5194/tc-15-3495-2021 1994-0416 1994-0424 https://tc.copernicus.org/articles/15/3495/2021/tc-15-3495-2021.pdf https://doaj.org/article/0db03e3bf44a4fe4b7acbbf28c836b1f undefined The Cryosphere, Vol 15, Pp 3495-3505 (2021) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2021 fttriple https://doi.org/10.5194/tc-15-3495-2021 2023-01-22T19:12:27Z 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. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula ice core The Cryosphere Unknown Antarctic Antarctic Peninsula Bruce Plateau ENVELOPE(-64.000,-64.000,-66.000,-66.000) Detroit ENVELOPE(-60.000,-60.000,-64.167,-64.167) Gomez ENVELOPE(-58.795,-58.795,-62.196,-62.196) The Antarctic The Cryosphere 15 7 3495 3505 |
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Open Polar |
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Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
geo envir |
spellingShingle |
geo envir J. M. Travassos S. S. Martins M. Potocki J. C. Simões Reconstruction of annual accumulation rate on firn, synchronising H2O2 concentration data with an estimated temperature record |
topic_facet |
geo envir |
description |
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. |
format |
Article in Journal/Newspaper |
author |
J. M. Travassos S. S. Martins M. Potocki J. C. Simões |
author_facet |
J. M. Travassos S. S. Martins M. Potocki J. C. Simões |
author_sort |
J. M. Travassos |
title |
Reconstruction of annual accumulation rate on firn, synchronising H2O2 concentration data with an estimated temperature record |
title_short |
Reconstruction of annual accumulation rate on firn, synchronising H2O2 concentration data with an estimated temperature record |
title_full |
Reconstruction of annual accumulation rate on firn, synchronising H2O2 concentration data with an estimated temperature record |
title_fullStr |
Reconstruction of annual accumulation rate on firn, synchronising H2O2 concentration data with an estimated temperature record |
title_full_unstemmed |
Reconstruction of annual accumulation rate on firn, synchronising H2O2 concentration data with an estimated temperature record |
title_sort |
reconstruction of annual accumulation rate on firn, synchronising h2o2 concentration data with an estimated temperature record |
publisher |
Copernicus Publications |
publishDate |
2021 |
url |
https://doi.org/10.5194/tc-15-3495-2021 https://tc.copernicus.org/articles/15/3495/2021/tc-15-3495-2021.pdf https://doaj.org/article/0db03e3bf44a4fe4b7acbbf28c836b1f |
long_lat |
ENVELOPE(-64.000,-64.000,-66.000,-66.000) ENVELOPE(-60.000,-60.000,-64.167,-64.167) ENVELOPE(-58.795,-58.795,-62.196,-62.196) |
geographic |
Antarctic Antarctic Peninsula Bruce Plateau Detroit Gomez The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Bruce Plateau Detroit Gomez The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula ice core The Cryosphere |
genre_facet |
Antarc* Antarctic Antarctic Peninsula ice core The Cryosphere |
op_source |
The Cryosphere, Vol 15, Pp 3495-3505 (2021) |
op_relation |
doi:10.5194/tc-15-3495-2021 1994-0416 1994-0424 https://tc.copernicus.org/articles/15/3495/2021/tc-15-3495-2021.pdf https://doaj.org/article/0db03e3bf44a4fe4b7acbbf28c836b1f |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/tc-15-3495-2021 |
container_title |
The Cryosphere |
container_volume |
15 |
container_issue |
7 |
container_start_page |
3495 |
op_container_end_page |
3505 |
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