Reconstructing Deglacial Circulation Changes in the Northern North Atlantic and Nordic Seas: Δ14C, δ13C, Temperature and δ18OSW Evidence
Ice-core records have revealed that atmospheric CO2 has varied during glacial-interglacial by ~90 ppm, with rapid increases in atmospheric CO2 occurring during deglaciations. It is widely accepted that changes in the amount of carbon stored in the deep ocean play a leading role in explaining these c...
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ftucl:oai:eprints.ucl.ac.uk.OAI2:1474082 2023-12-24T10:17:33+01:00 Reconstructing Deglacial Circulation Changes in the Northern North Atlantic and Nordic Seas: Δ14C, δ13C, Temperature and δ18OSW Evidence Thornalley, DJR 2015 text https://discovery.ucl.ac.uk/id/eprint/1474082/1/Thornalley%202015%20-%20Reconstructing%20deglacial%20circulation%20change%20NATL%20Nordic%20Nova%20Acta.pdf https://discovery.ucl.ac.uk/id/eprint/1474082/ eng eng https://discovery.ucl.ac.uk/id/eprint/1474082/1/Thornalley%202015%20-%20Reconstructing%20deglacial%20circulation%20change%20NATL%20Nordic%20Nova%20Acta.pdf https://discovery.ucl.ac.uk/id/eprint/1474082/ open Nova Acta Leopoldina , 121 (408) pp. 223-228. (2015) Article 2015 ftucl 2023-11-27T13:07:37Z Ice-core records have revealed that atmospheric CO2 has varied during glacial-interglacial by ~90 ppm, with rapid increases in atmospheric CO2 occurring during deglaciations. It is widely accepted that changes in the amount of carbon stored in the deep ocean play a leading role in explaining these cycles, primarily because of the size of the deep ocean carbon reservoir (~60 times that of the atmosphere) and the millennial timescales on which it interacts with the atmosphere (Sigman et al. 2010). To gain an understanding of how changes in deep ocean carbon storage may have controlled past variations in atmospheric CO2, we ideally require robust and detailed proxy records of the properties and ventilation pathways of the deep ocean across glacial-interglacial transitions. The deep ocean is ventilated in the high latitudes, where dense isopycnals outcrop at the sea surface. Therefore to help understand deep ocean-atmosphere exchange we require reconstructions of past hydrographic changes at these high latitude ventilation sites. Furthermore, constraints on the timing and phasing of deglacial changes in these regions enable us to evaluate hypotheses regarding the underlying mechanisms of the glacial termination. Article in Journal/Newspaper ice core Nordic Seas North Atlantic University College London: UCL Discovery |
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University College London: UCL Discovery |
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ftucl |
language |
English |
description |
Ice-core records have revealed that atmospheric CO2 has varied during glacial-interglacial by ~90 ppm, with rapid increases in atmospheric CO2 occurring during deglaciations. It is widely accepted that changes in the amount of carbon stored in the deep ocean play a leading role in explaining these cycles, primarily because of the size of the deep ocean carbon reservoir (~60 times that of the atmosphere) and the millennial timescales on which it interacts with the atmosphere (Sigman et al. 2010). To gain an understanding of how changes in deep ocean carbon storage may have controlled past variations in atmospheric CO2, we ideally require robust and detailed proxy records of the properties and ventilation pathways of the deep ocean across glacial-interglacial transitions. The deep ocean is ventilated in the high latitudes, where dense isopycnals outcrop at the sea surface. Therefore to help understand deep ocean-atmosphere exchange we require reconstructions of past hydrographic changes at these high latitude ventilation sites. Furthermore, constraints on the timing and phasing of deglacial changes in these regions enable us to evaluate hypotheses regarding the underlying mechanisms of the glacial termination. |
format |
Article in Journal/Newspaper |
author |
Thornalley, DJR |
spellingShingle |
Thornalley, DJR Reconstructing Deglacial Circulation Changes in the Northern North Atlantic and Nordic Seas: Δ14C, δ13C, Temperature and δ18OSW Evidence |
author_facet |
Thornalley, DJR |
author_sort |
Thornalley, DJR |
title |
Reconstructing Deglacial Circulation Changes in the Northern North Atlantic and Nordic Seas: Δ14C, δ13C, Temperature and δ18OSW Evidence |
title_short |
Reconstructing Deglacial Circulation Changes in the Northern North Atlantic and Nordic Seas: Δ14C, δ13C, Temperature and δ18OSW Evidence |
title_full |
Reconstructing Deglacial Circulation Changes in the Northern North Atlantic and Nordic Seas: Δ14C, δ13C, Temperature and δ18OSW Evidence |
title_fullStr |
Reconstructing Deglacial Circulation Changes in the Northern North Atlantic and Nordic Seas: Δ14C, δ13C, Temperature and δ18OSW Evidence |
title_full_unstemmed |
Reconstructing Deglacial Circulation Changes in the Northern North Atlantic and Nordic Seas: Δ14C, δ13C, Temperature and δ18OSW Evidence |
title_sort |
reconstructing deglacial circulation changes in the northern north atlantic and nordic seas: δ14c, δ13c, temperature and δ18osw evidence |
publishDate |
2015 |
url |
https://discovery.ucl.ac.uk/id/eprint/1474082/1/Thornalley%202015%20-%20Reconstructing%20deglacial%20circulation%20change%20NATL%20Nordic%20Nova%20Acta.pdf https://discovery.ucl.ac.uk/id/eprint/1474082/ |
genre |
ice core Nordic Seas North Atlantic |
genre_facet |
ice core Nordic Seas North Atlantic |
op_source |
Nova Acta Leopoldina , 121 (408) pp. 223-228. (2015) |
op_relation |
https://discovery.ucl.ac.uk/id/eprint/1474082/1/Thornalley%202015%20-%20Reconstructing%20deglacial%20circulation%20change%20NATL%20Nordic%20Nova%20Acta.pdf https://discovery.ucl.ac.uk/id/eprint/1474082/ |
op_rights |
open |
_version_ |
1786205771097178112 |