Response of the ocean, climate and terrestrial carbon cycle to Holocene freshwater discharge after 8 kyr BP
The "green'' McGill Paleoclimate Model is run from 8 to 0 kyr BP under variable insolation ( Milankovitch forcing), Taylor Dome CO2 ( radiative forcing) and four prescribed meltwater scenarios ( freshwater forcing) due to the retreat of the Laurentide Ice Sheet ( LIS). For each scenar...
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ftunivsussex:oai:sro.sussex.ac.uk:11345 2023-07-30T04:04:13+02:00 Response of the ocean, climate and terrestrial carbon cycle to Holocene freshwater discharge after 8 kyr BP Wang, Yi Mysak, Laurence A 2005 http://sro.sussex.ac.uk/id/eprint/11345/ https://doi.org/10.1029/2005GL023344 unknown Wang, Yi and Mysak, Laurence A (2005) Response of the ocean, climate and terrestrial carbon cycle to Holocene freshwater discharge after 8 kyr BP. Geophysical Research Letters, 32 (15). L15705. ISSN 0094-8276 Article PeerReviewed 2005 ftunivsussex https://doi.org/10.1029/2005GL023344 2023-07-11T20:08:59Z The "green'' McGill Paleoclimate Model is run from 8 to 0 kyr BP under variable insolation ( Milankovitch forcing), Taylor Dome CO2 ( radiative forcing) and four prescribed meltwater scenarios ( freshwater forcing) due to the retreat of the Laurentide Ice Sheet ( LIS). For each scenario, we constrain the total volume of meltwater to be 1.62 x 10(15) m(3) ( sea level-equivalent of 4.62 m), which is obtained from the work of Paterson ( 1972) and the reconstructed sea level increase between 8 and 6 kyr BP. During each freshwater perturbation, the simulated maximum Atlantic meridional overturning circulation (MOC) intensity is reduced, by amounts of up to 8 Sv. During the time of a weakened MOC, the sea surface temperature is reduced in the high-latitude North Atlantic and increased in the Southern Ocean. Our model results indicate that the freshwater impact on the Holocene climate and terrestrial carbon cycle is likely negligible after the 8.2-kyr cold event. Only a large freshwater perturbation (> 0.1 Sv) has a significant impact on the Holocene climate and terrestrial carbon cycle; it results in an enhanced cooling of about 1 degrees C in the Northern Hemisphere (NH) and notable drops in the global net primary productivity ( 2 PgC/yr) and total land carbon storage ( 40 PgC). Article in Journal/Newspaper Ice Sheet North Atlantic Southern Ocean University of Sussex: Sussex Research Online Southern Ocean Taylor Dome ENVELOPE(157.667,157.667,-77.667,-77.667) Paterson ENVELOPE(-154.600,-154.600,-78.033,-78.033) Geophysical Research Letters 32 15 |
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Open Polar |
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University of Sussex: Sussex Research Online |
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ftunivsussex |
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description |
The "green'' McGill Paleoclimate Model is run from 8 to 0 kyr BP under variable insolation ( Milankovitch forcing), Taylor Dome CO2 ( radiative forcing) and four prescribed meltwater scenarios ( freshwater forcing) due to the retreat of the Laurentide Ice Sheet ( LIS). For each scenario, we constrain the total volume of meltwater to be 1.62 x 10(15) m(3) ( sea level-equivalent of 4.62 m), which is obtained from the work of Paterson ( 1972) and the reconstructed sea level increase between 8 and 6 kyr BP. During each freshwater perturbation, the simulated maximum Atlantic meridional overturning circulation (MOC) intensity is reduced, by amounts of up to 8 Sv. During the time of a weakened MOC, the sea surface temperature is reduced in the high-latitude North Atlantic and increased in the Southern Ocean. Our model results indicate that the freshwater impact on the Holocene climate and terrestrial carbon cycle is likely negligible after the 8.2-kyr cold event. Only a large freshwater perturbation (> 0.1 Sv) has a significant impact on the Holocene climate and terrestrial carbon cycle; it results in an enhanced cooling of about 1 degrees C in the Northern Hemisphere (NH) and notable drops in the global net primary productivity ( 2 PgC/yr) and total land carbon storage ( 40 PgC). |
format |
Article in Journal/Newspaper |
author |
Wang, Yi Mysak, Laurence A |
spellingShingle |
Wang, Yi Mysak, Laurence A Response of the ocean, climate and terrestrial carbon cycle to Holocene freshwater discharge after 8 kyr BP |
author_facet |
Wang, Yi Mysak, Laurence A |
author_sort |
Wang, Yi |
title |
Response of the ocean, climate and terrestrial carbon cycle to Holocene freshwater discharge after 8 kyr BP |
title_short |
Response of the ocean, climate and terrestrial carbon cycle to Holocene freshwater discharge after 8 kyr BP |
title_full |
Response of the ocean, climate and terrestrial carbon cycle to Holocene freshwater discharge after 8 kyr BP |
title_fullStr |
Response of the ocean, climate and terrestrial carbon cycle to Holocene freshwater discharge after 8 kyr BP |
title_full_unstemmed |
Response of the ocean, climate and terrestrial carbon cycle to Holocene freshwater discharge after 8 kyr BP |
title_sort |
response of the ocean, climate and terrestrial carbon cycle to holocene freshwater discharge after 8 kyr bp |
publishDate |
2005 |
url |
http://sro.sussex.ac.uk/id/eprint/11345/ https://doi.org/10.1029/2005GL023344 |
long_lat |
ENVELOPE(157.667,157.667,-77.667,-77.667) ENVELOPE(-154.600,-154.600,-78.033,-78.033) |
geographic |
Southern Ocean Taylor Dome Paterson |
geographic_facet |
Southern Ocean Taylor Dome Paterson |
genre |
Ice Sheet North Atlantic Southern Ocean |
genre_facet |
Ice Sheet North Atlantic Southern Ocean |
op_relation |
Wang, Yi and Mysak, Laurence A (2005) Response of the ocean, climate and terrestrial carbon cycle to Holocene freshwater discharge after 8 kyr BP. Geophysical Research Letters, 32 (15). L15705. ISSN 0094-8276 |
op_doi |
https://doi.org/10.1029/2005GL023344 |
container_title |
Geophysical Research Letters |
container_volume |
32 |
container_issue |
15 |
_version_ |
1772815485159604224 |