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The role of iron as a micro-nutrient to the Antarctic sea-ice zone algal community - Casey Data

Entry ID: ASAC_3026_Casey

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Summary

Abstract: Public Description of the Project
This project will assess the importance of the trace micro-nutrient element iron to Antarctic sea-ice algal communities during the International Polar Year (2007-2009). We will investigate the biogeochemistry of iron, including a comprehensive examination of its distribution, speciation, cycling and role in fuelling ice-edge phytoplankton blooms. A significant ... part of this research will concentrate on the the influence of organic exopolysaccharides on iron solubility, complexation and bioavailability, both within the ice and in surrounding snow and surface seawater. This innovative research will improve our understanding of key processes that control the productivity of the climatically-important Antarctic sea-ice zone.

Project objectives:
This project will assess the importance of the trace element iron (Fe) as a micro-nutrient to seasonal sea-ice algal communities in the Australian sector of Antarctica during the International Polar Year (2007-09). We will investigate the biogeochemistry of Fe, including a comprehensive examination of its distribution, speciation, cycling and role in fuelling ice-edge phytoplankton blooms. A significant part of this research will concentrate on the influence of organic exopolysaccharides (EPS) on Fe solubility and complexation (and hence bioavailability), both within the ice and in surrounding surface waters. This innovative research will improve our understanding of key processes that control the productivity of the climatically-important Antarctic sea-ice zone.

This metadata record describes data collected at Casey Station as part of project 3026.

Collected data from the time series experiment in sea ice near Casey station Antarctica (66 degrees 13 minutes 07 seconds S, 110 degrees 39 minutes 02 seconds E). Measurements were made at the same location during seven consecutive study days between 10 November and 2 December 2009. Variables measured were pFe (particulate Fe), TDFe (total dissolvable Fe), dFe (dissolved Fe), plFe (particulate leachable Fe), PON (particulate organic nitrogen), POC (particulate organic carbon), Chl a (Chlorophyll a), salinity, ice temperature, vb/v (brine volume fraction), mean daily air temperature, and max daily air temperature.
Measurements were taken on each study day of the snow directly overlying the sea ice (SNOW), a shallow and a deep brine (B- and B+, respectively), three sections of the sea ice core at median depths 3, 33, and 73 centimeters (SI1, SI2, and SI3, respectively) as well as two consecutive sections in the lower most basal ice (SI4 and SI5). Finally, four samples were taken of the underlying seawater at 0, 5, 10 and 15 m (SW0, SW5, SW10 and SW15, respectively).

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Geographic Coverage

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Spatial coordinates

N: -66.2

S: -66.3

E: 110.7

W: 110.6

Data Set Citation

Dataset Release Date: 2012-02-28

Dataset DOI: doi:http://dx.doi.org/10.4225/15/514A83EF4D31E

Temporal Coverage

Start Date: 1810-04-01

Stop Date: 1958-04-30

Location Keywords

OCEAN > ATLANTIC OCEAN > NORTH ATLANTIC OCEAN

CONTINENT > NORTH AMERICA > CANADA > NEWFOUNDLAND

CONTINENT > NORTH AMERICA > CANADA > GRAND BANKS

GEOGRAPHIC REGION > NORTHERN HEMISPHERE

Science Keywords

CRYOSPHERE > SEA ICE > ICE EDGES

CRYOSPHERE > SEA ICE > ICE EXTENT

ISO Topic Category

CLIMATOLOGY/METEOROLOGY/ATMOSPHERE

GEOSCIENTIFIC INFORMATION

INLAND WATERS

OCEANS

Platform

SHIPS

MAPS

Access Constraints None

Ancillary Keywords

Grand Banks

Newfoundland

Labrador

Originating Center

CA/NRC/IOT > Institute for Ocean Technology, National Research Council, Canada

Data Center

Institute for Ocean Technology, National Research Council, Canada

Data Center URL: http://iot-ito.nrc-cnrc.gc.ca/
Dataset ID: Newfoundland and Grand Banks Ice Extent

Data Center Personnel
Name: BRIAN T. HILL Phone: 709 772 4735 Fax: 709 772 2462 Email: Brian.Hill at nrc.ca Contact Address: National Research Council Canada Box 12093 Institute for Ocean Technology City: St. John's Province or State: Newfoundland Postal Code: A1B 3T5 Country: Canada

Distribution

Distribution Media: Online

Fees: Free

Personnel

BRIAN T. HILL

Role: INVESTIGATOR

Role: DIF AUTHOR

Phone: 709 772 4735

Fax: 709 772 2462

Email: Brian.Hill at nrc.ca

Contact Address:

National Research Council Canada

Box 12093

Institute for Ocean Technology

City: St. John's

Province or State: Newfoundland

Postal Code: A1B 3T5

Country: Canada

Creation and Review Dates

DIF Creation Date: 2005-06-15

Last DIF Revision Date: 2009-08-03

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