Inferring palaeo-accumulation records from ice-core data by an adjoint-based method: application to James Ross Island's ice core
Ice cores contain a record of snow precipitation that includes information about past atmospheric circulation and mass imbalance in the polar regions. We present a novel approach to reconstruct a climatic record – by both optimally dating an ice core and deriving from it a detailed accumulation hist...
Published in: | Climate of the Past |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2015
|
Subjects: | |
Online Access: | https://doi.org/10.5194/cp-11-547-2015 https://doaj.org/article/054bcc6eaede453785cfdc17335c9e1f |
id |
ftdoajarticles:oai:doaj.org/article:054bcc6eaede453785cfdc17335c9e1f |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:054bcc6eaede453785cfdc17335c9e1f 2023-05-15T13:30:38+02:00 Inferring palaeo-accumulation records from ice-core data by an adjoint-based method: application to James Ross Island's ice core C. Martín R. Mulvaney G. H. Gudmundsson H. Corr 2015-03-01T00:00:00Z https://doi.org/10.5194/cp-11-547-2015 https://doaj.org/article/054bcc6eaede453785cfdc17335c9e1f EN eng Copernicus Publications http://www.clim-past.net/11/547/2015/cp-11-547-2015.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 1814-9324 1814-9332 doi:10.5194/cp-11-547-2015 https://doaj.org/article/054bcc6eaede453785cfdc17335c9e1f Climate of the Past, Vol 11, Iss 3, Pp 547-557 (2015) Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 article 2015 ftdoajarticles https://doi.org/10.5194/cp-11-547-2015 2022-12-31T03:49:10Z Ice cores contain a record of snow precipitation that includes information about past atmospheric circulation and mass imbalance in the polar regions. We present a novel approach to reconstruct a climatic record – by both optimally dating an ice core and deriving from it a detailed accumulation history – that uses an adjoint-based method. The motivation of our work is the recent application of phase-sensitive radar which measures the vertical velocity of an ice column. The velocity is dependent on the history of subsequent snow accumulation, compaction and compression; in our inverse formulation of this problem, measured vertical velocity profiles can be utilized directly, thereby reducing the uncertainty introduced by ice-flow modelling. We first apply our method to synthetic data in order to study its capability and the effect of noise and gaps in the age–depth observations. The method is then applied to the ice core retrieved from James Ross Island, Antarctica. We show that the method is robust and that the results depend on the quality of the age–depth observations and the derived flow regime around the core site. The method facilitates the incorporation of increasing detail provided by ice-core analysis together with observed full-depth velocity in order to construct a complete climatic record of the polar regions. Article in Journal/Newspaper Antarc* Antarctica ice core James Ross Island Ross Island Directory of Open Access Journals: DOAJ Articles Ross Island Climate of the Past 11 3 547 557 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
spellingShingle |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 C. Martín R. Mulvaney G. H. Gudmundsson H. Corr Inferring palaeo-accumulation records from ice-core data by an adjoint-based method: application to James Ross Island's ice core |
topic_facet |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
description |
Ice cores contain a record of snow precipitation that includes information about past atmospheric circulation and mass imbalance in the polar regions. We present a novel approach to reconstruct a climatic record – by both optimally dating an ice core and deriving from it a detailed accumulation history – that uses an adjoint-based method. The motivation of our work is the recent application of phase-sensitive radar which measures the vertical velocity of an ice column. The velocity is dependent on the history of subsequent snow accumulation, compaction and compression; in our inverse formulation of this problem, measured vertical velocity profiles can be utilized directly, thereby reducing the uncertainty introduced by ice-flow modelling. We first apply our method to synthetic data in order to study its capability and the effect of noise and gaps in the age–depth observations. The method is then applied to the ice core retrieved from James Ross Island, Antarctica. We show that the method is robust and that the results depend on the quality of the age–depth observations and the derived flow regime around the core site. The method facilitates the incorporation of increasing detail provided by ice-core analysis together with observed full-depth velocity in order to construct a complete climatic record of the polar regions. |
format |
Article in Journal/Newspaper |
author |
C. Martín R. Mulvaney G. H. Gudmundsson H. Corr |
author_facet |
C. Martín R. Mulvaney G. H. Gudmundsson H. Corr |
author_sort |
C. Martín |
title |
Inferring palaeo-accumulation records from ice-core data by an adjoint-based method: application to James Ross Island's ice core |
title_short |
Inferring palaeo-accumulation records from ice-core data by an adjoint-based method: application to James Ross Island's ice core |
title_full |
Inferring palaeo-accumulation records from ice-core data by an adjoint-based method: application to James Ross Island's ice core |
title_fullStr |
Inferring palaeo-accumulation records from ice-core data by an adjoint-based method: application to James Ross Island's ice core |
title_full_unstemmed |
Inferring palaeo-accumulation records from ice-core data by an adjoint-based method: application to James Ross Island's ice core |
title_sort |
inferring palaeo-accumulation records from ice-core data by an adjoint-based method: application to james ross island's ice core |
publisher |
Copernicus Publications |
publishDate |
2015 |
url |
https://doi.org/10.5194/cp-11-547-2015 https://doaj.org/article/054bcc6eaede453785cfdc17335c9e1f |
geographic |
Ross Island |
geographic_facet |
Ross Island |
genre |
Antarc* Antarctica ice core James Ross Island Ross Island |
genre_facet |
Antarc* Antarctica ice core James Ross Island Ross Island |
op_source |
Climate of the Past, Vol 11, Iss 3, Pp 547-557 (2015) |
op_relation |
http://www.clim-past.net/11/547/2015/cp-11-547-2015.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 1814-9324 1814-9332 doi:10.5194/cp-11-547-2015 https://doaj.org/article/054bcc6eaede453785cfdc17335c9e1f |
op_doi |
https://doi.org/10.5194/cp-11-547-2015 |
container_title |
Climate of the Past |
container_volume |
11 |
container_issue |
3 |
container_start_page |
547 |
op_container_end_page |
557 |
_version_ |
1766011042718023680 |