Modeling Mediterranean Ocean climate of the Last Glacial Maximum Max-Planck-Institut für Meteorologie, Bundesstr. 53, 20146 Hamburg, Germany
03 Mar 2011
Received: 25 Aug 2010 – Published in Clim. Past Discuss.: 01 Oct 2010Abstract. A regional ocean general circulation model of the Mediterranean is
used to study the climate of the Last Glacial Maximum. The atmospheric
forcing for these simulations has been derived from simulations with
an atmospheric general circulation model, which in turn was forced
with surface conditions from a coarse resolution earth system model.
The model is successful in reproducing the general patterns of
reconstructed sea surface temperature anomalies with the strongest
cooling in summer in the northwestern Mediterranean and weak cooling
in the Levantine, although the model underestimates the extent of the
summer cooling in the western Mediterranean. However, there is a
strong vertical gradient associated with this pattern of summer
cooling, which makes the comparison with reconstructions
complicated. The exchange with the Atlantic is decreased to roughly one
half of its present value, which can be explained by the shallower
Strait of Gibraltar as a consequence of lower global sea level. This
reduced exchange causes a strong increase of salinity in the
Mediterranean in spite of reduced net evaporation.
Revised: 24 Jan 2011 – Accepted: 26 Jan 2011 – Published: 03 Mar 2011
Citation: Mikolajewicz, U.: Modeling Mediterranean Ocean climate of the Last Glacial Maximum, Clim. Past, 7, 161-180, doi:10.5194/cp-7-161-2011, 2011.