Simulated changes in vegetation distribution, land carbon storage, and atmospheric CO2 in response to a collapse of the North Atlantic thermohaline circulation
Measurements on glacial ice show that atmospheric CO2 varied by 20ppmv with large iceberg discharges into the North Atlantic (NA) and themost prominent Dansgaard/ Oeschger (D/O) climate fluctuations. CO2variations during less pronounced D/O events were smaller than a fewppm. The D/O fluctuations hav...
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Online Access: | https://epic.awi.de/id/eprint/10912/ https://epic.awi.de/id/eprint/10912/1/Khl2004i.pdf https://doi.org/10.1007/s00382-005-0058-8 https://hdl.handle.net/10013/epic.21380 https://hdl.handle.net/10013/epic.21380.d001 |
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ftawi:oai:epic.awi.de:10912 2023-09-05T13:20:12+02:00 Simulated changes in vegetation distribution, land carbon storage, and atmospheric CO2 in response to a collapse of the North Atlantic thermohaline circulation Köhler, Peter Joos, F. Gerber, S. Knutti, R. 2005 application/pdf https://epic.awi.de/id/eprint/10912/ https://epic.awi.de/id/eprint/10912/1/Khl2004i.pdf https://doi.org/10.1007/s00382-005-0058-8 https://hdl.handle.net/10013/epic.21380 https://hdl.handle.net/10013/epic.21380.d001 unknown https://epic.awi.de/id/eprint/10912/1/Khl2004i.pdf https://hdl.handle.net/10013/epic.21380.d001 Köhler, P. orcid:0000-0003-0904-8484 , Joos, F. , Gerber, S. and Knutti, R. (2005) Simulated changes in vegetation distribution, land carbon storage, and atmospheric CO2 in response to a collapse of the North Atlantic thermohaline circulation , Climate Dynamics, 25 (7), pp. 689-708 . doi:10.1007/s00382-005-0058-8 <https://doi.org/10.1007/s00382-005-0058-8> , hdl:10013/epic.21380 EPIC3Climate Dynamics, 25(7), pp. 689-708 Article isiRev 2005 ftawi https://doi.org/10.1007/s00382-005-0058-8 2023-08-22T19:48:58Z Measurements on glacial ice show that atmospheric CO2 varied by 20ppmv with large iceberg discharges into the North Atlantic (NA) and themost prominent Dansgaard/ Oeschger (D/O) climate fluctuations. CO2variations during less pronounced D/O events were smaller than a fewppm. The D/O fluctuations have been linked to changes in the NAThermohaline Circulation (THC). Here, we analyse how abrupt changes inthe NA THC affect the terrestrial carbon cycle by forcing theLund-Potsdam-Jena Dynamic Global Vegetation Model with climateperturbations from freshwater experiments with the ECBILT-CLIOgeneral circulation model. Changes in the marine carbon cycle are notaddressed. Modelled NA THC collapsed and recovered after about amillennium in response to prescribed freshwater forcing. The initialcooling of several Kelvin over Eurasia causes a reduction ofextant boreal and temperate forests and a decrease in carbon storage inhigh northern latitudes, whereas improved growing conditions andslower soil decomposition rates lead to enhanced storage inmid-latitudes. The magnitude and evolution of global terrestrialcarbon storage in response to abrupt THC changes depends sensitivelyon the initial climate conditions. Terrestrial storage varies between-67 and +50 PgC for arange of experiments that start at different times during the last21,000 years. Simulated peak-to-peak differences in atmospheric CO2and d13C are between {6 and 18 ppmv} and $0.18$ and $0.30$~\mypermil and compatible with the ice core CO2 record. Article in Journal/Newspaper ice core North Atlantic North atlantic Thermohaline circulation Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Climate Dynamics 25 7-8 689 708 |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Measurements on glacial ice show that atmospheric CO2 varied by 20ppmv with large iceberg discharges into the North Atlantic (NA) and themost prominent Dansgaard/ Oeschger (D/O) climate fluctuations. CO2variations during less pronounced D/O events were smaller than a fewppm. The D/O fluctuations have been linked to changes in the NAThermohaline Circulation (THC). Here, we analyse how abrupt changes inthe NA THC affect the terrestrial carbon cycle by forcing theLund-Potsdam-Jena Dynamic Global Vegetation Model with climateperturbations from freshwater experiments with the ECBILT-CLIOgeneral circulation model. Changes in the marine carbon cycle are notaddressed. Modelled NA THC collapsed and recovered after about amillennium in response to prescribed freshwater forcing. The initialcooling of several Kelvin over Eurasia causes a reduction ofextant boreal and temperate forests and a decrease in carbon storage inhigh northern latitudes, whereas improved growing conditions andslower soil decomposition rates lead to enhanced storage inmid-latitudes. The magnitude and evolution of global terrestrialcarbon storage in response to abrupt THC changes depends sensitivelyon the initial climate conditions. Terrestrial storage varies between-67 and +50 PgC for arange of experiments that start at different times during the last21,000 years. Simulated peak-to-peak differences in atmospheric CO2and d13C are between {6 and 18 ppmv} and $0.18$ and $0.30$~\mypermil and compatible with the ice core CO2 record. |
format |
Article in Journal/Newspaper |
author |
Köhler, Peter Joos, F. Gerber, S. Knutti, R. |
spellingShingle |
Köhler, Peter Joos, F. Gerber, S. Knutti, R. Simulated changes in vegetation distribution, land carbon storage, and atmospheric CO2 in response to a collapse of the North Atlantic thermohaline circulation |
author_facet |
Köhler, Peter Joos, F. Gerber, S. Knutti, R. |
author_sort |
Köhler, Peter |
title |
Simulated changes in vegetation distribution, land carbon storage, and atmospheric CO2 in response to a collapse of the North Atlantic thermohaline circulation |
title_short |
Simulated changes in vegetation distribution, land carbon storage, and atmospheric CO2 in response to a collapse of the North Atlantic thermohaline circulation |
title_full |
Simulated changes in vegetation distribution, land carbon storage, and atmospheric CO2 in response to a collapse of the North Atlantic thermohaline circulation |
title_fullStr |
Simulated changes in vegetation distribution, land carbon storage, and atmospheric CO2 in response to a collapse of the North Atlantic thermohaline circulation |
title_full_unstemmed |
Simulated changes in vegetation distribution, land carbon storage, and atmospheric CO2 in response to a collapse of the North Atlantic thermohaline circulation |
title_sort |
simulated changes in vegetation distribution, land carbon storage, and atmospheric co2 in response to a collapse of the north atlantic thermohaline circulation |
publishDate |
2005 |
url |
https://epic.awi.de/id/eprint/10912/ https://epic.awi.de/id/eprint/10912/1/Khl2004i.pdf https://doi.org/10.1007/s00382-005-0058-8 https://hdl.handle.net/10013/epic.21380 https://hdl.handle.net/10013/epic.21380.d001 |
genre |
ice core North Atlantic North atlantic Thermohaline circulation |
genre_facet |
ice core North Atlantic North atlantic Thermohaline circulation |
op_source |
EPIC3Climate Dynamics, 25(7), pp. 689-708 |
op_relation |
https://epic.awi.de/id/eprint/10912/1/Khl2004i.pdf https://hdl.handle.net/10013/epic.21380.d001 Köhler, P. orcid:0000-0003-0904-8484 , Joos, F. , Gerber, S. and Knutti, R. (2005) Simulated changes in vegetation distribution, land carbon storage, and atmospheric CO2 in response to a collapse of the North Atlantic thermohaline circulation , Climate Dynamics, 25 (7), pp. 689-708 . doi:10.1007/s00382-005-0058-8 <https://doi.org/10.1007/s00382-005-0058-8> , hdl:10013/epic.21380 |
op_doi |
https://doi.org/10.1007/s00382-005-0058-8 |
container_title |
Climate Dynamics |
container_volume |
25 |
container_issue |
7-8 |
container_start_page |
689 |
op_container_end_page |
708 |
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1776200919311974400 |