Sea level ~400 000 years ago (MIS 11): analogue for present and future sea-level? School of Earth and Ocean Sciences, Cardiff University, Cardiff, CF10 3YE, UK
Received: 29 Apr 2009 – Published in Clim. Past Discuss.: 13 Jul 2009 Abstract. Comparison of the sea-level today with that of 400 000 years ago
(MIS 11), when the Earth's orbital characteristics were similar may
provide, under conditions of natural variability, indications of
future sea-level during the present interglacial. Then, as now,
orbital eccentricity was low and precession dampened. Evidence for
MIS 11 sea-level occurs on uplifting coastlines where shorelines
with geochronological ages have been preserved. The sea-level term
and the uplift term may be separated with an "uplift correction"
formula. This discovers the original sea-level at which the now
uplifted shoreline was fashioned. Estimates are based on average
uplift rates of the "last interglacial" sea-level (MIS 5.5) using
a range of estimates for sea-level and age at that time at different
locations. These, with varying secular tectonic regimes in different
ocean basins, provide a band of estimates for the MIS 11 sea-level.
They do not support the hypothesis of an MIS 11 sea-level at
~20 m, and instead show that it was closer to its present
Revised: 30 Nov 2009 – Accepted: 09 Dec 2009 – Published: 19 Jan 2010
Citation: Bowen, D. Q.: Sea level ~400 000 years ago (MIS 11): analogue for present and future sea-level?, Clim. Past, 6, 19-29, doi:10.5194/cp-6-19-2010, 2010.