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Assessing Model projections of Changes in Ocean Mixed-Layer Depth

PI: seulji kwon
Institution: CCCMA
Abstract:
This project will analyze output from multiple climate models to
assess projected changes in ocean mixed-layer depth (MLD), emphasizing
changes in the North Pacific Ocean. The NRL mixed-layer depth
algorithm of Kara et al. (JGR 2000) will be employed as a standard
measure of MLD applied to all models.

Projected changes in the mean and standard deviation of winter and
summer MLD will be constructed from 20C3M and SRESA1B scenarios, based
on 10-year time slices of monthly data which are separated by 50-year
intervals. The period 1900-2100 will be considered, with computed MLD
changes referenced to ca. 1900. Statistical significance of the
computed MLD changes will be assessed with reference to the interannual
variability within the various time slices.

Attribution of the detected MLD changes will be attempted by examining
concomitant changes in surface temperature and salinity, near-surface
ocean stratification, and surface wind speed.
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    Lawrence Livermore National Laboratory  |  Physical & Life Sciences Directorate