Rapid Climatic Warming in the past: reconstruction and modelling

2.50
Hdl Handle:
http://hdl.handle.net/10029/256060
Title:
Rapid Climatic Warming in the past: reconstruction and modelling
Authors:
Vandenberghe J; Isarin RFB; Renssen H
Other Titles:
Snelle opwarming van het klimaat in het verleden: reconstructie en modellering
Abstract:
Abstract niet beschikbaar

The last two important periods of climate warming (at c. 14.7 and 11.5 kyr BP) in NW and Central Europe are characterized quantitatively by their shifts especially in winter and summer temperature, but also in effective precipitation. Two independent methods are used: simulations with the ECHAM4 atmospheric general circulation model and reconstructions based on geological and palaeoecological data. In both climatic transitions, January temperatures increased by as much as 20 degrees Celcius from -25 degrees a -15 degrees Celcius to -5 degrees a +5 degrees Celcius. During July the changes were smaller: temperatures increased on the average by 3-5 degrees from 10 degrees -15 degrees Celcius to 13-17 degrees Celcius during both warming phases. In both transitions an increase in precipitation was balanced by a comparable increase in evapotranspiration so that the effective precipitation remained rather stable or increased slightly. The strong increase in January temperatures was forced by changes in the N Atlantic Ocean, as the variations in sea surface temperatures and the position of the sea ice margin determined the temperature change over land. The increase in July temperatures was mainly driven by the small increase in insolation and the deglaciation of Scotland and Scandinavia. The latter effects were much less than the changes in the N Atlantic Ocean. In addition, the magnitude of the two climate shifts was geographically changing as a result of different distances to the Atlantic Ocean and the land ice. Moreover, the timing of the major warming phases is spatially different, as this timing is mainly determined by the relative distance to the sea ice and land ice margins.
Affiliation:
NOP
Issue Date:
17-Jan-2001
URI:
http://hdl.handle.net/10029/256060
Additional Links:
http://www.rivm.nl/bibliotheek/rapporten/410200054.html
Type:
Onderzoeksrapport
Language:
en
Description:
Order by e-mail: nop.secr@rivm.nl or by http//www.nop.rivm.nl/
ISBN:
90 5851 035 2
Sponsors:
SG-NOP
Appears in Collections:
RIVM official reports

Full metadata record

DC FieldValue Language
dc.contributor.authorVandenberghe J-
dc.contributor.authorIsarin RFB-
dc.contributor.authorRenssen H-
dc.date.accessioned2012-12-12T13:13:37Z-
dc.date.available2012-12-12T13:13:37Z-
dc.date.issued2001-01-17-
dc.identifier410200054-
dc.identifier.isbn90 5851 035 2-
dc.identifier.urihttp://hdl.handle.net/10029/256060-
dc.descriptionOrder by e-mail: nop.secr@rivm.nl or by http//www.nop.rivm.nl/en
dc.description.abstractAbstract niet beschikbaarnl
dc.description.abstractThe last two important periods of climate warming (at c. 14.7 and 11.5 kyr BP) in NW and Central Europe are characterized quantitatively by their shifts especially in winter and summer temperature, but also in effective precipitation. Two independent methods are used: simulations with the ECHAM4 atmospheric general circulation model and reconstructions based on geological and palaeoecological data. In both climatic transitions, January temperatures increased by as much as 20 degrees Celcius from -25 degrees a -15 degrees Celcius to -5 degrees a +5 degrees Celcius. During July the changes were smaller: temperatures increased on the average by 3-5 degrees from 10 degrees -15 degrees Celcius to 13-17 degrees Celcius during both warming phases. In both transitions an increase in precipitation was balanced by a comparable increase in evapotranspiration so that the effective precipitation remained rather stable or increased slightly. The strong increase in January temperatures was forced by changes in the N Atlantic Ocean, as the variations in sea surface temperatures and the position of the sea ice margin determined the temperature change over land. The increase in July temperatures was mainly driven by the small increase in insolation and the deglaciation of Scotland and Scandinavia. The latter effects were much less than the changes in the N Atlantic Ocean. In addition, the magnitude of the two climate shifts was geographically changing as a result of different distances to the Atlantic Ocean and the land ice. Moreover, the timing of the major warming phases is spatially different, as this timing is mainly determined by the relative distance to the sea ice and land ice margins.en
dc.description.sponsorshipSG-NOP-
dc.format.extent160 p-
dc.language.isoen-
dc.relation.ispartofGlobal Change NOP-NRP report 410200954-
dc.relation.urlhttp://www.rivm.nl/bibliotheek/rapporten/410200054.html-
dc.subject04nl
dc.subjectklimaatveranderingnl
dc.subjectgeschiedenisnl
dc.subjectanalysenl
dc.subjectmodellenonderzoeknl
dc.subjectclimatic changesen
dc.subjecthistoryen
dc.subjectanalysisen
dc.subjectmodellingen
dc.subjectclimatic warmingen
dc.titleRapid Climatic Warming in the past: reconstruction and modellingen
dc.title.alternativeSnelle opwarming van het klimaat in het verleden: reconstructie en modelleringnl
dc.typeOnderzoeksrapport-
dc.contributor.departmentNOP-
dc.date.updated2012-12-12T13:13:37Z-
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