Interannual variability of hydrographic properties in Potter Cove during summers between 2010 and 2017

The temporal and spatial variability of oceanographic properties in Potter Cove was analysed for the 2010–17 summer periods. This was linked with meteorological parameters and sea ice. The water column structure presented significant differences in turbidity between two areas (away from and closer t...

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Bibliographic Details
Published in:Antarctic science 2021-06, Vol.33 (3), p.281-300
Main Authors: Ruiz Barlett, E.M., Sierra, M.E., Costa, A.J., Tosonotto, G.V.
Format: Article
Language:English
Subjects:
Air temperature
Atmospheric conditions
Atmospheric pressure
Climate change
Coasts
Columnar structure
El Nino
El Nino phenomena
El Nino-Southern Oscillation event
Glacial sedimentation
Glacier retreat
Glaciers
Interannual variability
Islands
La Nina
Meteorological parameters
Opinion
Parameters
Precipitation
Properties
Salinity
Sea ice
Southern Oscillation
Spatial variability
Spatial variations
Stratification
Summer
Temperature
Turbidity
Vertical distribution
Water circulation
Water column
Wind
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Summary:The temporal and spatial variability of oceanographic properties in Potter Cove was analysed for the 2010–17 summer periods. This was linked with meteorological parameters and sea ice. The water column structure presented significant differences in turbidity between two areas (away from and closer to the Fourcade Glacier). The recent retreat has been transforming it into a land terminating glacier. Therefore, correlations obtained between oceanographic properties near the glacier and meteorological parameters reveal that atmospheric conditions are the main forcing of the Potter system, in agreement with previous studies. Also, high turbidity values within deeper waters in 2013 and 2014 were probably related to resuspended glacial sediment input into the cove. Interannual variability observed in the local parameters was connected to ENSO and SAM, reflecting a larger connection with ENSO, mainly in longer timescales. Colder waters during the 2010 and 2016 El Niño phases could be related to lower air temperature. In summer 2010 during a negative SAM phase, colder, more saline and low turbid waters were observed. Alternatively, in 2012 during La Niña and positive SAM, warmer, fresher and more turbid conditions were found with high vertical stratification. Finally, during 2015 (positive SAM), warmer and low salinity waters were observed.
ISSN:0954-1020
1365-2079
DOI:10.1017/S0954102020000668