Transient changes in the global carbon cycle during the last glacial/interglacial transition
The glacial/interglacial rise in atmospheric CO2 is one of thebest known changes in paleoclimate research - yet the cause for it is still unknown.Forcing a coupled ocean--atmosphere--biosphere box model of the global carbon cycle with proxy data over the last glacial termination we are able to quant...
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ftawi:oai:epic.awi.de:10098 2023-09-05T13:21:09+02:00 Transient changes in the global carbon cycle during the last glacial/interglacial transition Köhler, Peter Fischer, Hubertus 2004 application/pdf https://epic.awi.de/id/eprint/10098/ https://epic.awi.de/id/eprint/10098/1/Khl2004c.pdf https://hdl.handle.net/10013/epic.20593 https://hdl.handle.net/10013/epic.20593.d001 unknown https://epic.awi.de/id/eprint/10098/1/Khl2004c.pdf https://hdl.handle.net/10013/epic.20593.d001 Köhler, P. orcid:0000-0003-0904-8484 and Fischer, H. (2004) Transient changes in the global carbon cycle during the last glacial/interglacial transition , Geophysical Research Abstracts, Vol. 6, 01957, 2004. European Geosciences Union, 1st General Assembly, 25-30 April 2004, Nice, France. . hdl:10013/epic.20593 EPIC3Geophysical Research Abstracts, Vol. 6, 01957, 2004. European Geosciences Union, 1st General Assembly, 25-30 April 2004, Nice, France. Conference notRev 2004 ftawi 2023-08-22T19:48:27Z The glacial/interglacial rise in atmospheric CO2 is one of thebest known changes in paleoclimate research - yet the cause for it is still unknown.Forcing a coupled ocean--atmosphere--biosphere box model of the global carbon cycle with proxy data over the last glacial termination we are able to quantitatively reproduce transient variations in pCO2 and its isotopic signatures (d13c, D14c) observed in natural climate archives.According to our model, a reduction of aeolian iron fertilization in the Southern Ocean together with a breakdown in Southern Ocean stratification, the latter caused by rapid sea ice retreat, trigger the onset of the pCO2 increase.After these events the reduced North Atlantic Deep Water (NADW) formation during the Heinrich 1 event and the subsequent resumption of ocean circulation at the beginning of the Boelling-Alleroed warm interval are the main processes determining the atmospheric carbon records in the subsequent time periodof Termination I.We further deduce that a complete shutdown of the NADW formation during the Younger Dryas was very unlikely.Changes in ocean temperature and the terrestrial carbon storage together with carbonate compensation are the dominant processes explaining atmospheric d13C after the Boelling-Alleroed warm interval. Conference Object NADW North Atlantic Deep Water North Atlantic Sea ice Southern Ocean Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Southern Ocean |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
unknown |
description |
The glacial/interglacial rise in atmospheric CO2 is one of thebest known changes in paleoclimate research - yet the cause for it is still unknown.Forcing a coupled ocean--atmosphere--biosphere box model of the global carbon cycle with proxy data over the last glacial termination we are able to quantitatively reproduce transient variations in pCO2 and its isotopic signatures (d13c, D14c) observed in natural climate archives.According to our model, a reduction of aeolian iron fertilization in the Southern Ocean together with a breakdown in Southern Ocean stratification, the latter caused by rapid sea ice retreat, trigger the onset of the pCO2 increase.After these events the reduced North Atlantic Deep Water (NADW) formation during the Heinrich 1 event and the subsequent resumption of ocean circulation at the beginning of the Boelling-Alleroed warm interval are the main processes determining the atmospheric carbon records in the subsequent time periodof Termination I.We further deduce that a complete shutdown of the NADW formation during the Younger Dryas was very unlikely.Changes in ocean temperature and the terrestrial carbon storage together with carbonate compensation are the dominant processes explaining atmospheric d13C after the Boelling-Alleroed warm interval. |
format |
Conference Object |
author |
Köhler, Peter Fischer, Hubertus |
spellingShingle |
Köhler, Peter Fischer, Hubertus Transient changes in the global carbon cycle during the last glacial/interglacial transition |
author_facet |
Köhler, Peter Fischer, Hubertus |
author_sort |
Köhler, Peter |
title |
Transient changes in the global carbon cycle during the last glacial/interglacial transition |
title_short |
Transient changes in the global carbon cycle during the last glacial/interglacial transition |
title_full |
Transient changes in the global carbon cycle during the last glacial/interglacial transition |
title_fullStr |
Transient changes in the global carbon cycle during the last glacial/interglacial transition |
title_full_unstemmed |
Transient changes in the global carbon cycle during the last glacial/interglacial transition |
title_sort |
transient changes in the global carbon cycle during the last glacial/interglacial transition |
publishDate |
2004 |
url |
https://epic.awi.de/id/eprint/10098/ https://epic.awi.de/id/eprint/10098/1/Khl2004c.pdf https://hdl.handle.net/10013/epic.20593 https://hdl.handle.net/10013/epic.20593.d001 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
NADW North Atlantic Deep Water North Atlantic Sea ice Southern Ocean |
genre_facet |
NADW North Atlantic Deep Water North Atlantic Sea ice Southern Ocean |
op_source |
EPIC3Geophysical Research Abstracts, Vol. 6, 01957, 2004. European Geosciences Union, 1st General Assembly, 25-30 April 2004, Nice, France. |
op_relation |
https://epic.awi.de/id/eprint/10098/1/Khl2004c.pdf https://hdl.handle.net/10013/epic.20593.d001 Köhler, P. orcid:0000-0003-0904-8484 and Fischer, H. (2004) Transient changes in the global carbon cycle during the last glacial/interglacial transition , Geophysical Research Abstracts, Vol. 6, 01957, 2004. European Geosciences Union, 1st General Assembly, 25-30 April 2004, Nice, France. . hdl:10013/epic.20593 |
_version_ |
1776201759618760704 |