Estimating ocean climatologies for short periods: A simple technique for removing the effect of eddies from temperature and salinity profiles

Details Estimating ocean climatologies for short periods: A simple technique for removing the effect of eddies from temperature and salinity profiles Estimating ocean climatologies for short periods: A simple technique for removing the effect of eddies from temperature and salinity profiles

Oct 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009georl..3619602h&link_type=abstract

Geophysical Research Letters, Volume 36, Issue 19, CiteID L19602

Physics

1

Oceanography: General: Climate And Interannual Variability (1616, 1635, 3305, 3309, 4513), Oceanography: Physical: Eddies And Mesoscale Processes, Oceanography: Physical: Instruments And Techniques, Oceanography: General: Ocean Observing Systems, Oceanography: General: Remote Sensing And Electromagnetic Processes (0689, 2487, 3285, 4455, 6934)

Scientific paper

Existing temperature and salinity ocean climatologies are usually mean fields based on observations collected over many decades. Because of low frequency variability of major features such as the Gulf Stream it is often more appropriate to define the mean for shorter periods, but there are subsequently fewer observations and more problems with aliasing of mesoscale variability. We present a method for removing eddy-related noise from observations using satellite altimeter sea surface height measurements. We demonstrate the technique using Argo observations from the northwest Atlantic and produce mean temperature and salinity fields for an eight year period. The reduction in variance achieved is quantified. Comparison with an existing climatology shows that there is good agreement between the two analyses but that the representation of the Gulf Stream is more realistic in the new climatology.

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