The global hydroclimate response during the Younger Dryas event
To analyze the global hydroclimate response during the Younger Dryas cold event, we evaluate climate model results that have been constrained with proxy-based temperatures from the North Atlantic region. We find that both the temperature and the hydroclimate response have a clear global signature. A...
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2018
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Online Access: | https://research.vu.nl/en/publications/0b7afd39-7813-49b3-a402-b413c9413c51 https://doi.org/10.1016/j.quascirev.2018.05.033 https://hdl.handle.net/1871.1/0b7afd39-7813-49b3-a402-b413c9413c51 https://research.vu.nl/ws/files/118940526/The_global_hydroclimate_response_during_the_Younger_Dryas_event.pdf http://www.scopus.com/inward/record.url?scp=85048766053&partnerID=8YFLogxK http://www.scopus.com/inward/citedby.url?scp=85048766053&partnerID=8YFLogxK |
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ftvuamstcris:oai:research.vu.nl:publications/0b7afd39-7813-49b3-a402-b413c9413c51 2024-09-15T18:21:36+00:00 The global hydroclimate response during the Younger Dryas event Renssen, Hans Goosse, Hugues Roche, Didier M. Seppä, Heikki 2018-08-01 application/pdf https://research.vu.nl/en/publications/0b7afd39-7813-49b3-a402-b413c9413c51 https://doi.org/10.1016/j.quascirev.2018.05.033 https://hdl.handle.net/1871.1/0b7afd39-7813-49b3-a402-b413c9413c51 https://research.vu.nl/ws/files/118940526/The_global_hydroclimate_response_during_the_Younger_Dryas_event.pdf http://www.scopus.com/inward/record.url?scp=85048766053&partnerID=8YFLogxK http://www.scopus.com/inward/citedby.url?scp=85048766053&partnerID=8YFLogxK eng eng https://research.vu.nl/en/publications/0b7afd39-7813-49b3-a402-b413c9413c51 info:eu-repo/semantics/openAccess Renssen , H , Goosse , H , Roche , D M & Seppä , H 2018 , ' The global hydroclimate response during the Younger Dryas event ' , Quaternary Science Reviews , vol. 193 , pp. 84-97 . https://doi.org/10.1016/j.quascirev.2018.05.033 Global Paleoclimate modelling Younger Dryas /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water article 2018 ftvuamstcris https://doi.org/10.1016/j.quascirev.2018.05.033 2024-09-05T00:23:22Z To analyze the global hydroclimate response during the Younger Dryas cold event, we evaluate climate model results that have been constrained with proxy-based temperatures from the North Atlantic region. We find that both the temperature and the hydroclimate response have a clear global signature. A marked cooling is simulated over the North Atlantic Ocean (more than 5 °C) and the downwind continents (2–4 °C). This response is related to the weakening of the Atlantic meridional overturning circulation under influence of meltwater discharges. The hydroclimate response is most expressed over Eurasia in a belt between 40 and 60°N, and over Northern Africa in the Sahel region. In both areas, a strong decrease in soil moisture is simulated (up to 20% reduction). In contrast, a striking increase in moisture is found over southeastern North America (15% increase), where southerly atmospheric flow brings moist air to the continent. Outside these areas that are clearly affected by the cold North Atlantic Ocean, the responses of temperature and moisture are decoupled, with different causes for these temperature and hydroclimate responses. In the tropics, the hydroclimate response is governed by the southward shift of the intertropical convergence zone (ITCZ) due to the cooling of the North Atlantic Ocean. This causes drier conditions north of the equator and wetter conditions in the Southern Hemisphere tropics. The associated changes in soil moisture are relatively gradual here, taking up to two centuries to complete, suggesting that the impact of the ITCZ shift on the tropical hydroclimate is building up. Our experiment indicates that Southern Hemisphere continents experienced a small cooling (less than 0.5 °C) during the Younger Dryas, caused by the negative radiative forcing associated with reduced atmospheric methane concentrations and enhanced dust levels. In our simulation, the bi-polar seesaw mechanism is relatively weak, so that the associated warming of the South Atlantic Ocean is not overwhelming the reduction ... Article in Journal/Newspaper North Atlantic South Atlantic Ocean Vrije Universiteit Amsterdam (VU): Research Portal Quaternary Science Reviews 193 84 97 |
institution |
Open Polar |
collection |
Vrije Universiteit Amsterdam (VU): Research Portal |
op_collection_id |
ftvuamstcris |
language |
English |
topic |
Global Paleoclimate modelling Younger Dryas /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water |
spellingShingle |
Global Paleoclimate modelling Younger Dryas /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water Renssen, Hans Goosse, Hugues Roche, Didier M. Seppä, Heikki The global hydroclimate response during the Younger Dryas event |
topic_facet |
Global Paleoclimate modelling Younger Dryas /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water |
description |
To analyze the global hydroclimate response during the Younger Dryas cold event, we evaluate climate model results that have been constrained with proxy-based temperatures from the North Atlantic region. We find that both the temperature and the hydroclimate response have a clear global signature. A marked cooling is simulated over the North Atlantic Ocean (more than 5 °C) and the downwind continents (2–4 °C). This response is related to the weakening of the Atlantic meridional overturning circulation under influence of meltwater discharges. The hydroclimate response is most expressed over Eurasia in a belt between 40 and 60°N, and over Northern Africa in the Sahel region. In both areas, a strong decrease in soil moisture is simulated (up to 20% reduction). In contrast, a striking increase in moisture is found over southeastern North America (15% increase), where southerly atmospheric flow brings moist air to the continent. Outside these areas that are clearly affected by the cold North Atlantic Ocean, the responses of temperature and moisture are decoupled, with different causes for these temperature and hydroclimate responses. In the tropics, the hydroclimate response is governed by the southward shift of the intertropical convergence zone (ITCZ) due to the cooling of the North Atlantic Ocean. This causes drier conditions north of the equator and wetter conditions in the Southern Hemisphere tropics. The associated changes in soil moisture are relatively gradual here, taking up to two centuries to complete, suggesting that the impact of the ITCZ shift on the tropical hydroclimate is building up. Our experiment indicates that Southern Hemisphere continents experienced a small cooling (less than 0.5 °C) during the Younger Dryas, caused by the negative radiative forcing associated with reduced atmospheric methane concentrations and enhanced dust levels. In our simulation, the bi-polar seesaw mechanism is relatively weak, so that the associated warming of the South Atlantic Ocean is not overwhelming the reduction ... |
format |
Article in Journal/Newspaper |
author |
Renssen, Hans Goosse, Hugues Roche, Didier M. Seppä, Heikki |
author_facet |
Renssen, Hans Goosse, Hugues Roche, Didier M. Seppä, Heikki |
author_sort |
Renssen, Hans |
title |
The global hydroclimate response during the Younger Dryas event |
title_short |
The global hydroclimate response during the Younger Dryas event |
title_full |
The global hydroclimate response during the Younger Dryas event |
title_fullStr |
The global hydroclimate response during the Younger Dryas event |
title_full_unstemmed |
The global hydroclimate response during the Younger Dryas event |
title_sort |
global hydroclimate response during the younger dryas event |
publishDate |
2018 |
url |
https://research.vu.nl/en/publications/0b7afd39-7813-49b3-a402-b413c9413c51 https://doi.org/10.1016/j.quascirev.2018.05.033 https://hdl.handle.net/1871.1/0b7afd39-7813-49b3-a402-b413c9413c51 https://research.vu.nl/ws/files/118940526/The_global_hydroclimate_response_during_the_Younger_Dryas_event.pdf http://www.scopus.com/inward/record.url?scp=85048766053&partnerID=8YFLogxK http://www.scopus.com/inward/citedby.url?scp=85048766053&partnerID=8YFLogxK |
genre |
North Atlantic South Atlantic Ocean |
genre_facet |
North Atlantic South Atlantic Ocean |
op_source |
Renssen , H , Goosse , H , Roche , D M & Seppä , H 2018 , ' The global hydroclimate response during the Younger Dryas event ' , Quaternary Science Reviews , vol. 193 , pp. 84-97 . https://doi.org/10.1016/j.quascirev.2018.05.033 |
op_relation |
https://research.vu.nl/en/publications/0b7afd39-7813-49b3-a402-b413c9413c51 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.quascirev.2018.05.033 |
container_title |
Quaternary Science Reviews |
container_volume |
193 |
container_start_page |
84 |
op_container_end_page |
97 |
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1810460252822306816 |