Physics
Scientific paper
Aug 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005georl..3215601k&link_type=abstract
Geophysical Research Letters, Volume 32, Issue 15, CiteID L15601
Physics
2
Oceanography: General: Climate And Interannual Variability (1616, 1635, 3305, 3309, 4513), Oceanography: General: Water Masses, Oceanography: General: Instruments And Techniques, Oceanography: Physical: Decadal Ocean Variability (1616, 1635, 3305, 4215)
Scientific paper
This paper demonstrates that CTD data from autonomous profiling floats can be used to detect basin-scale changes of water properties on decadal, and potentially shorter, timescales. In the western Indian Ocean at 32°S, the properties of Subantarctic Mode Water have changed such that between 1987 and 2002, salinity has increased by 0.04 at certain temperature levels. Although in this case detailed and high-accuracy data are available from a research cruise, we demonstrate that floats have the following value: real-time float data are of sufficient accuracy to reveal changes in ocean properties on timescales of a decade or less; floats achieve spatial and temporal coverage not possible with research ships, providing vital supporting evidence for the interpretation of cruise CTD data. Floats therefore provide a mechanism for monitoring changes during the interval between dedicated research cruises and for identifying areas in which further cruises are likely to be fruitful.
King Brian A.
McDonagh Elaine L.
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