Float 5900324 spent 900 days in a region of very low salinity
gradients just north of the Equator. Towards the end of the
time series it entered a region of lower salinity in the north,
crossing a moderate gradient in the process. The AAIW
salinity minimum recorded by the float shows a similar trend
to the AAIW salinity minimum derived from the WOA data
and a short term variability that barely exceeds the instrument
resolution.