Reconstructing the Late Miocene climate and oceanic heat flux using the AGCM ECHAM4 coupled to a mixed-layer ocean model with adjusted flux correction (Record no. 42606)

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control field 20250625124717.0
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Transcribing agency CICY
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Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) B-8300
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245 10 - TITLE STATEMENT
Title Reconstructing the Late Miocene climate and oceanic heat flux using the AGCM ECHAM4 coupled to a mixed-layer ocean model with adjusted flux correction
490 0# - SERIES STATEMENT
Volume/sequential designation Palaeogeography, Palaeoclimatology, PalaeoEcology, 238, p.399-423, 2006
520 3# - SUMMARY, ETC.
Summary, etc. In terms of climate, the Late Miocene represents a transitional phase between the Eocene greenhouse climate and the Quaternary icehouse situation; it is characterised by an extensive Antarctic ice sheet and incipient glaciation in the Northern Hemisphere. In order to better understand the Late Miocene climate, we performed a imulation study for the Tortonian using the complex atmospheric general circulation model ECHAM4 coupled to a mixed-layer ocean model. The boundary conditions such as the orography and the continental ice distribution were adapted to the Tortonian conditions; considering the coarse geographic resolution of the model, the land-sea distribution was assumed to be similar to the present situation and the atmospheric CO2 concentration was set to 353ppm. Because the mixed-layer ocean model uses a flux correction tuned to the modern oceanic heat transport a method was developed to estimate the Tortonian palaeo-flux correction based on the zonally averaged SST gradients. As compared to the present-day world, the Tortonian model run shows a significant reduction in the oceanic heat transport, a considerable warming and reduction of sea ice in high latitudes, a weakening of the Asian monsoon, a cooling in the mid-latitudes- caused by the reduced oceanic heat transport-and an increase in precipitation in Southern Europe. Except for the cooling of the mid-latitudes these results are largely consistent with proxy-data and other modelling studies although the proxy data indicate much warmer conditions in high latitudes than calculated in the model. The reasons for the discrepancies between model-based and proxy data reconstructions are discussed.
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element CLIMATE MODELLING
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element MIXED-LAYER OCEAN MODEL
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element FLUX CORRECTION
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element SEA SURFACE TEMPERATURE
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element MIOCENE
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Steppuhn, A.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Micheels, A.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Geiger, G.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Mosbrugger, V.
856 40 - ELECTRONIC LOCATION AND ACCESS
Uniform Resource Identifier <a href="https://drive.google.com/file/d/1HgYlVAaGOOrt-snmWdRmyjxTkl28cABU/view?usp=drivesdk">https://drive.google.com/file/d/1HgYlVAaGOOrt-snmWdRmyjxTkl28cABU/view?usp=drivesdk</a>
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  Clasificación local     Ref1 CICY CICY Documento préstamo interbibliotecario 25.06.2025   B-8300 25.06.2025 25.06.2025 Documentos solicitados