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| Titel |
Monthly Isopycnal/Mixed-layer Ocean Climatology (MIMOC) |
| VerfasserIn |
Sunke Schmidtko, Gregory Johnson, John Lymann |
| Konferenz |
EGU General Assembly 2013
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250082924
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| Zusammenfassung |
| A monthly, isopycnal/mixed-layer ocean climatology (MIMOC) is presented, motivated by comparisons with other monthly ocean climatologies. All available quality-controlled profiles of temperature (T) and salinity (S) versus pressure (P) collected by conductivity temperature-depth (CTD) instruments from the Argo Program, Ice-Tethered Profilers, and archived in the World Ocean Database are used for this climatology. MIMOC provides maps of mixed layer properties (conservative temperature (Θ), Absolute Salinity SA, and maximum pressure P) as well as maps of interior ocean properties (Θ, SA, and P) on isopycnal surfaces. A third product merges the two onto a pressure grid spanning the upper 1950 dbar and provides the more familiar potential temperature (θ) and practical salinity (S). All maps are at monthly × 0.5° × 0.5° resolution, spanning from 80°S to 90°N. The optimal interpolation used to map the data incorporates an isobath-following component using a “Fast Marching” algorithm, as well as front-sharpening components in both the mixed layer and on interior isopycnals. Recent data are emphasized in the mapping. The goal is to compute a climatology that looks as much as possible like synoptic surveys sampled circa 2007–2011 during all phases of the seasonal cycle, minimizing transient eddy and wave signatures. MIMOC preserves a surface mixed layer, minimizes both diapycnal and isopycnal smoothing of θ–S, as well as preserving density structure in the vertical (pycnoclines and pycnostads) and the horizontal (fronts and their associated currents). It resolves water-mass features, as well as fronts and associated currents, with a high level of detail and fidelity. |
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