(Table 1) Surface water chemistry of northern Victoria Land lakes

Concentrations of major ions, silicate and nutrients (total N and P) were measured in samples of surface water from 28 lakes in ice-free areas of northern Victoria Land (East Antarctica). Sixteen lakes were sampled during austral summers 2001/02, 2003/04, 2004/05 and 2005/06 to assess temporal varia...

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Bibliographic Details
Main Authors: Borghini, Francesca, Colacevich, Andrea, Caruso, Tancredi, Bargagli, Roberto
Format: Dataset
Language:English
Published: PANGAEA 2008
Subjects:
Calcium
standard deviation
Chloride
Conductivity
electrical
DEPTH
water
International Polar Year (2007-2008)
Ion chromatography DX-120 (Dionex Corp.)
IPY
Magnesium
Nitrate
Nitrogen
total
Nitrogen/Phosphorus ratio
N-VictoriaL_lakes
pH
Phosphorus
Potassium
Sample amount
Sampling date
Silicon
Sodium
Sulfate
UV/VIS Spectrometer
Antarctic
East Antarctica
Austral
Victoria Land
Antarc*
Antarctica
International Polar Year
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.807883
https://doi.org/10.1594/PANGAEA.807883
Description
Summary:Concentrations of major ions, silicate and nutrients (total N and P) were measured in samples of surface water from 28 lakes in ice-free areas of northern Victoria Land (East Antarctica). Sixteen lakes were sampled during austral summers 2001/02, 2003/04, 2004/05 and 2005/06 to assess temporal variation in water chemistry. Although samples showed a wide range in ion concentrations, their composition mainly reflected that of seawater. In general, as the distance from the sea increased, the input of elements from the marine environment (through aerosols and seabirds) decreased and there was an increase in nitrate and sulfate concentrations. Antarctic lakes lack outflows and during the austral summer the melting and/or ablation of ice cover, water evaporation and leaching processes in dry soils determine a progressive increase in water ion concentrations. During the five-year monitoring survey, no statistically significant variation in the water chemistry were detected, except for a slight (hardly significant) increase in TN concentrations. However, Canonical Correspondence Analysis (CCA) indicated that other factors besides distance from the sea, the presence of nesting seabirds, the sampling time and percentage of ice cover affect the composition of water in Antarctic cold desert environments.

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