An Argo mixed layer climatology and database

TitleAn Argo mixed layer climatology and database
Publication TypeJournal Article
Year of Publication2017
AuthorsHolte J., Talley LD, Gilson J., Roemmich D.
JournalGeophysical Research Letters
Volume44
Pagination5618-5626
Date Published2017/06
Type of ArticleArticle
ISBN Number0094-8276
Accession NumberWOS:000404382600042
Keywordsantarctic mode; Argo; circulation; Climatology; convection; depths; global; intermediate; labrador sea-water; mixed layer; mode water; north-atlantic; ocean; transport
Abstract

A global climatology and database of mixed layer properties are computed from nearly 1,250,000 Argo profiles. The climatology is calculated with both a hybrid algorithm for detecting the mixed layer depth (MLD) and a standard threshold method. The climatology provides accurate information about the depth, properties, extent, and seasonal patterns of global mixed layers. The individual profile results in the database can be used to construct time series of mixed layer properties in specific regions of interest.  The MLDs calculated by the hybrid algorithm are shallower and generally more accurate than those of the threshold method, particularly in regions of deep winter mixed layers; the new climatology differs the most from existing mixed layer climatologies in these regions. Examples are presented from the Labrador and Irminger Seas, the Southern Ocean, and the North Atlantic Ocean near the Gulf Stream. In these regions the threshold method tends to overestimate winter MLDs by approximately 10% compared to the algorithm.

DOI10.1002/2017gl073426
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