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Sampling based chemical and biogeochemical stratification profiles of melt water ponds at Bratina Island, McMurdo Ice Shelf
Entry ID: K081_2005_2006_NZ_2


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Summary
Abstract: A comprehensive suite of geochemical samples and measurements from a selection of meltwater ponds at Bratina Island was collected in the 2005/06 and 2006/07 seasons. The purpose was to help identify interactions between inorganic and organic carbon and the biogeochemical cycling of this element within meltwater ponds and to assess model predictions against observed winter freezing conditions in certain ponds. In the first season of study four melt water ponds were selected for sampling based chemical stratification profiles including conductivity profiles taken in the centre of each pond at 5cm and 10cm intervals, representative depths identified to sample based on the stratified layers, at each depth water samples were collected for nutrient, cation, anion bicarbonate, sulphide, dissolved organic carbon, trace metal and arsenic analysis with temperature, pH, conductivity, dissolved oxygen and Eh measured immediately for each sample. In the second season of the study, seven melt water ponds were selected and sampled for collection and in situ measurements of chemical profile data and water samples. Sediment and salt samples were also collected from within and around ponds in this area over both seasons to help characterise the geochemical extremes in melt water ponds. Extensive sampling of microbial mat, sediment and water communities, along with corresponding environmental data and water samples and measurements of key environmental processes, were used to understand the effects of water chemistry on species composition.

Related URL
Link: VIEW PROJECT HOME PAGE
Description: National Institute for Water and Atmospheric Research (NIWA)


Geographic Coverage
 N: -78.0 S: -78.0  E: 165.3333  W: 165.3333

Temporal Coverage
Start Date: 2005-12-19
Stop Date: 2005-12-28

Start Date: 2007-01-16
Stop Date: 2007-01-29


Location Keywords
CONTINENT > ANTARCTICA
CONTINENT > ANTARCTICA > BRATINA ISLAND
GEOGRAPHIC REGION > POLAR


Science Keywords
TERRESTRIAL HYDROSPHERE >WATER QUALITY/WATER CHEMISTRY >CONDUCTIVITY    [Definition]
TERRESTRIAL HYDROSPHERE >WATER QUALITY/WATER CHEMISTRY >NUTRIENTS    [Definition]
TERRESTRIAL HYDROSPHERE >WATER QUALITY/WATER CHEMISTRY >OXYGEN    [Definition]
TERRESTRIAL HYDROSPHERE >WATER QUALITY/WATER CHEMISTRY >PH    [Definition]
TERRESTRIAL HYDROSPHERE >WATER QUALITY/WATER CHEMISTRY >TRACE METALS    [Definition]
TERRESTRIAL HYDROSPHERE >WATER QUALITY/WATER CHEMISTRY >WATER TEMPERATURE    [Definition]
TERRESTRIAL HYDROSPHERE >WATER QUALITY/WATER CHEMISTRY >WATER ION CONCENTRATION    [Definition]
BIOLOGICAL CLASSIFICATION >BACTERIA/ARCHAEA >CYANOBACTERIA (BLUE-GREEN ALGAE)    [Definition]


ISO Topic Category
INLAND WATERS


Project
LGP >Latitudinal Gradient Project    [Information]
EBA >Evolution and Biodiversity in the Antarctic    [Information]


Data Set Progress
COMPLETE


Data Center
Antarctica New Zealand, New Zealand Antarctic Institute, New Zealand    [Information]
Data Center URL: http://www.antarcticanz.govt.nz/

Data Center Personnel
Name: SHULAMIT GORDON
Phone: +64 3 358 0200
Fax: +64 3 358 0211
Email: s.gordon at antarcticanz.govt.nz
Contact Address:
Antarctica New Zealand
Private Bag 4745
City: Christchurch
Country: New Zealand


Personnel
BRIAN SORRELL
Role: INVESTIGATOR
Phone: +64 3 343 7802
Fax: +64 3 348 5548
Email: b.sorrell at niwa.co.nz
Contact Address:
NIWA
PO BOX 11-115
City: Christchurch
Country: New Zealand


IAN HAWES
Role: INVESTIGATOR
Email: AquaticResearchSolutions at gmail.com
Email: ian.hawes at canterbury.ac.nz
Contact Address:
Waterways Centre for Freshwater Management
University of Canterbury
City: Christchurch
Country: New Zealand


CLIVE HOWARD-WILLIAMS
Role: INVESTIGATOR
Phone: +64 3 343 7857
Fax: +64 3 348 5548
Email: c.howard-williams at niwa.co.nz
Contact Address:
NIWA
PO BOX 8602
City: Christchurch
Country: New Zealand


CEISHA POIROT
Role: DIF AUTHOR
Phone: +64 3 358 0200
Fax: +64 3 358 0211
Email: c.poirot at antarcticanz.govt.nz
Contact Address:
Antarctica New Zealand
Private Bag 4745
City: Christchurch
Country: New Zealand


SHULAMIT GORDON
Role: DIF AUTHOR
Phone: +64 3 358 0200
Fax: +64 3 358 0211
Email: s.gordon at antarcticanz.govt.nz
Contact Address:
Antarctica New Zealand
Private Bag 4745
City: Christchurch
Country: New Zealand


Publications/References
Wait, B.R. Webster-Brown, J.G. Brown, K.L. Healy, M. Hawes, I. Chemistry and stratification of Antarctic meltwater ponds I: Coastal ponds near Bratina Island, McMurdo Ice Shelf. Antarctic science 18(4): 515-524, 2006.

Wait, B.R., Nokes, R., Webster-Brown, J.G. 2009. Freeze-thaw dynamics and the implications for stratification and brine geochemistry in meltwater ponds on the McMurdo Ice Shelf, Antarctica. Antarctic science 21: 243-254.
doi: 10.1017/S0954102006000563

Creation and Review Dates
DIF Creation Date: 2008-10-06
Last DIF Revision Date: 2010-02-23


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