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

Published online by Cambridge University Press:  14 January 2021

E.M. Ruiz Barlett Open the ORCID record for E.M. Ruiz Barlett [Opens in a new window] ,
M.E. Sierra Open the ORCID record for M.E. Sierra [Opens in a new window] ,
A.J. Costa Open the ORCID record for A.J. Costa [Opens in a new window]  and
G.V. Tosonotto Open the ORCID record for G.V. Tosonotto [Opens in a new window]
E.M. Ruiz Barlett*
Affiliation:
Instituto Antártico Argentino, Av. 25 de Mayo 1143 (B1650HMK), General San Martín, Buenos Aires, Argentina
M.E. Sierra
Affiliation:
Instituto Antártico Argentino, Av. 25 de Mayo 1143 (B1650HMK), General San Martín, Buenos Aires, Argentina
A.J. Costa
Affiliation:
Instituto Antártico Argentino, Av. 25 de Mayo 1143 (B1650HMK), General San Martín, Buenos Aires, Argentina
G.V. Tosonotto
Affiliation:
Instituto Antártico Argentino, Av. 25 de Mayo 1143 (B1650HMK), General San Martín, Buenos Aires, Argentina
*
*Departamento de Oceanografía, Instituto Antártico Argentino, Av. 25 de Mayo 1143 (B1650HMK), General San Martín, Buenos Aires, Argentina[email protected]
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Abstract

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.

Keywords

Antarctic fjordENSOKing George Islandmeltwateroceanographic and meteorological parametersSAM
Type
Opinion
Information
Antarctic Science , Volume 33 , Issue 3 , June 2021 , pp. 281 - 300
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Copyright
Copyright © Antarctic Science Ltd 2021

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