Last Glacial Maximum world ocean simulations at eddy-permitting and coarse resolutions: do eddies contribute to a better consistency between models and palaeoproxies?

↓ Direkt till sidans innehåll
↓ Direkt till sidans sekundära innehåll (sidomenyn)

Search: onr:"swepub:oai:DiVA.org:kth-139246" > Last Glacial Maximu...

1 of 1
Previous record
Next record
To hitlist

Last Glacial Maximum world ocean simulations at eddy-permitting and coarse resolutions : do eddies contribute to a better consistency between models and palaeoproxies?

Ballarotta, Maxime (author): Stockholms universitet,Meteorologiska institutionen (MISU)

Laurent, Brodeau (author): Stockholms universitet,Meteorologiska institutionen (MISU)

Brandefelt, Jenny (author): KTH,Turbulens

Lundberg, Peter (author): Stockholms universitet,Meteorologiska institutionen (MISU)

Döös, Kristofer (author): Stockholms universitet,Meteorologiska institutionen (MISU)

show less...

(creator_code:org_t)

2013-11-28
2013
English.
In: Climate of the Past. - : Copernicus GmbH. - 1814-9324 .- 1814-9332. ; 9:6, s. 2669-2686

Related links:: https://www.clim-pas...; show more...; https://doi.org/10.5...; https://urn.kb.se/re...; https://doi.org/10.5...; https://urn.kb.se/re...; show less...

Journal article (peer-reviewed)

Abstract Subject headings

Most state-of-the-art climate models include a coarsely resolved oceanic component, which hardly captures detailed dynamics, whereas eddy-permitting and eddy-resolving simulations are developed to reproduce the observed ocean. In this study, an eddy-permitting and a coarse resolution numerical experiment are conducted to simulate the global ocean state for the period of the Last Glacial Maximum (LGM, similar to 26 500 to 19 000 yr ago) and to investigate the improvements due to taking into account the smaller spatial scales. The ocean state from each simulation is confronted with a data set from the Multiproxy Approach for the Reconstruction of the Glacial Ocean (MARGO) sea surface temperatures (SSTs), some reconstructions of the palaeo-circulations and a number of sea-ice reconstructions. The western boundary currents and the Southern Ocean dynamics are better resolved in the high-resolution experiment than in the coarse simulation, but, although these more detailed SST structures yield a locally improved consistency between model predictions and proxies, they do not contribute significantly to the global statistical score. The SSTs in the tropical coastal upwelling zones are also not significantly improved by the eddy-permitting regime. The models perform in the mid-latitudes but as in the majority of the Paleo-climate Modelling Intercomparison Project simulations, the modelled sea-ice conditions are inconsistent with the palaeo-reconstructions. The effects of observation locations on the comparison between observed and simulated SST suggest that more sediment cores may be required to draw reliable conclusions about the improvements introduced by the high resolution model for reproducing the global SSTs. One has to be careful with the interpretation of the deep ocean state which has not reached statistical equilibrium in our simulations. However, the results indicate that the meridional overturning circulations are different between the two regimes, suggesting that the model parametrizations might also play a key role for simulating past climate states.

Subject headings

NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Klimatforskning (hsv//swe)
NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Climate Research (hsv//eng)
NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Oceanografi, hydrologi och vattenresurser (hsv//swe)
NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Oceanography, Hydrology and Water Resources (hsv//eng)

Keyword

Meridional Overturning Circulation
Pmip2 Coupled Simulations
Sea-Surface Temperatures
Southern-Ocean
North-Atlantic
Ice-Age
Thermohaline Circulation
Climate
Reconstruction
Margo

Publication and Content Type

ref (subject category)
art (subject category)

Find in a library

Climate of the Past (Search for host publication in LIBRIS)

To the university's database

1 of 1
Previous record
Next record
To hitlist

Find more in SwePub

By the author/editor: Ballarotta, Maxi ...; Laurent, Brodeau; Brandefelt, Jenn ...; Lundberg, Peter; Döös, Kristofer

About the subject

NATURAL SCIENCES: NATURAL SCIENCES; and Earth and Relate ...; and Climate Research

NATURAL SCIENCES: NATURAL SCIENCES; and Earth and Relate ...; and Oceanography Hyd ...

Articles in the publication: Climate of the P ...

By the university: Royal Institute of Technology; Stockholm University

Search outside SwePub

Extend your search to:: Google; Google Book Search; Google Scholar

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

LIBRIS.kb.se