Sökning: id:"swepub:oai:DiVA.org:su-106949" >
Evolution of the la...
Evolution of the large-scale atmospheric circulation in response to changing ice sheets over the last glacial cycle
-
- Löfverström, Marcus (författare)
- Stockholms universitet,Meteorologiska institutionen (MISU)
-
- Caballero, Rodrigo (författare)
- Stockholms universitet,Meteorologiska institutionen (MISU)
-
- Nilsson, Johan (författare)
- Stockholms universitet,Meteorologiska institutionen (MISU)
-
visa fler...
-
- Kleman, Johan (författare)
- Stockholms universitet,Institutionen för naturgeografi och kvartärgeologi (INK)
-
visa färre...
-
(creator_code:org_t)
- 2014-07-31
- 2014
- Engelska.
-
Ingår i: Climate of the Past. - : Copernicus GmbH. - 1814-9324 .- 1814-9332. ; 10:4, s. 1453-1471
- Relaterad länk:
-
https://doi.org/10.5...
-
visa fler...
-
https://su.diva-port... (primary) (Raw object)
-
https://www.clim-pas...
-
https://urn.kb.se/re...
-
https://doi.org/10.5...
-
visa färre...
Abstract
Ämnesord
Stäng
- We present modelling results of the atmospheric circulation at the cold periods of marine isotope stage 5b (MIS 5b), MIS 4 and the Last Glacial Maximum (LGM), as well as the interglacial. The palaeosimulations are forced by ice-sheet reconstructions consistent with geological evidence and by appropriate insolation and greenhouse gas concentrations. The results suggest that the large-scale atmospheric winter circulation remained largely similar to the interglacial for a significant part of the glacial cycle. The proposed explanation is that the ice sheets were located in areas where their interaction with the mean flow is limited. However, the LGM Laurentide Ice Sheet induces a much larger planetary wave that leads to a zonalisation of the Atlantic jet. In summer, the ice-sheet topography dynamically induces warm temperatures in Alaska and central Asia that inhibits the expansion of the ice sheets into these regions. The warm temperatures may also serve as an explanation for westward propagation of the Eurasian Ice Sheet from MIS 4 to the LGM.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Meteorologi och atmosfärforskning (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Meteorology and Atmospheric Sciences (hsv//eng)
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
Till lärosätets databas