Gas flux over sea ice and calcium carbonate concentration in sea ice from the SIPEX II voyage of the Aurora Australis
Entry ID: SIPEX_II_Gas_Flux

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Summary
Abstract: Gas Flux over Sea Ice
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We observed amount of gas exchange between sea ice and atmosphere. At the ice station, semi-automated chambers developed in Japan, were used for measurement of air-sea ice CO2 flux. These chambers could be used to examine spatial variability and also temporal variability of gas flux over sea ice. Samples were also taken from the snow and ice in order to measure CH4 and VOC, however these analyses will be conducted post-voyage. This metadata record will be updated in future to reflect the analysis.

The chambers are designed to be placed over a snow and sea ice. When the lid is closed, CO2 concentration was measured. The opening and closing functions of the chambers are automated and were set to a 30 minutes interval. CO2 concentration (as voltage) were recorded in the data logger (CR10X, Campbell Scientific Inc.) and downloaded after the experiments. Raw data are contained in the excel files.

During the CO2 flux measurement, we collected the snow, sea ice, brine/slush and under-ice water. Snow and sea ice samples were melted after sampling in PVDF film bags (like Tedlar bags in order to avoid gas exchange with ambient air) in 4C temperature and treated for analysis.
A chemical analysis for carbonate systems and VOC (water), salinity, nutrient, pigment and oxygen isotopic ratio samples will take place in Japan after the voyage for analysis.
During the cruise, to examine ice growth processes, we made sea ice thin-section to classify the ice cores into granular ice, columnar ice or mixed granular and columnar ice (Eicken and Lange, 1989).

The CO2 data are contained in Excel spreadsheets. These use Japanese column headings.

Calcium Carbonate (CACO3.6H20) as Ikaite in Sea Ice and Snow
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At each listed ice station we collected sea-ice cores using a Kovacs 9cm ice corer. Cores were sectioned into 10-20cm and melted at 4 degrees C, filtered and dried for later analysis of Calcium Carbonate in a home laboratory using an ICP, which produces text file outputs (included).

Also included is a spreadsheet listing the cores, and the calcium carbonate measurements.

Related URL
Link: GET DATA
Description: Download point for the data


Link: VIEW PROJECT HOME PAGE
Description: Public information for ASAC project 4073


Link: VIEW RELATED INFORMATION
Description: Citation reference for this metadata record and dataset


Parent DIF
This data set description is a member of a collection. The collection is described in
SIPEX_II


Geographic Coverage
 N: -64.24 S: -64.24  E: 120.05  W: 120.05
 N: -64.55 S: -64.55  E: 120.59  W: 120.59
 N: -65.08 S: -65.08  E: 120.48  W: 120.48
 N: -65.15 S: -65.15  E: 120.02  W: 120.02
 N: -65.16 S: -65.16  E: 119.05  W: 119.05
 N: -64.85 S: -64.85  E: 116.85  W: 116.85

Temporal Coverage
Start Date: 2012-09-28
Stop Date: 2012-10-29


Location Keywords
OCEAN > SOUTHERN OCEAN
CONTINENT > ANTARCTICA
GEOGRAPHIC REGION > POLAR


Science Keywords
CRYOSPHERE >SEA ICE    [Definition]
OCEANS >OCEAN CHEMISTRY >CARBON DIOXIDE    [Definition]


ISO Topic Category
ENVIRONMENT
OCEANS


Platform
R/V AA >R/V Aurora Australis


Access Constraints
These data are not yet publicly available.


Use Constraints
This data set conforms to the PICCCBY Attribution License
(http://creativecommons.org/licenses/by/3.0/).

Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=SIPEX_II... when using these data.


Keywords
SIPEX
Gas Flux
CO2 Flux


Data Set Progress
IN WORK


Originating Center
Australian Antarctic Division


Data Center
Australian Antarctic Data Centre, Australia    [Information]
Data Center URL: http://data.aad.gov.au

Data Center Personnel
Name: DATA OFFICER AADC
Phone: +61 3 6232 3244
Fax: +61 3 6232 3351
Email: metadata at aad.gov.au
Contact Address:
Australian Antarctic Division
203 Channel Highway
City: Kingston
Province or State: Tasmania
Postal Code: 7050
Country: Australia



Distribution
Distribution_Media: HTTP
Distribution_Size: 12.9 MB
Distribution_Format: Excel
Fees: Free


Personnel
KLAUS MEINERS
Role: INVESTIGATOR
Role: TECHNICAL CONTACT
Role: DIF AUTHOR
Phone: + 61 3 6226 7201
Email: klaus.meiners at acecrc.org.au
Contact Address:
Sea-ice Ecologist
Antarctic Climate and Ecosystems Cooperative Research Centre (ACE CRC)
Private Bag 80
City: Hobart
Province or State: Tasmania
Postal Code: 7001
Country: Australia


GERHARD DIECKMANN
Role: INVESTIGATOR
Email: gerhard.dieckmann at awi.de
Contact Address:
Alfred-Wegener-Institut fuer Polar- und Meeresforschung
Am Handelshafen 12
City: Bremerhaven
Country: Germany


ELLEN DAMM
Role: INVESTIGATOR
Email: Ellen.Damm at awi.de
Contact Address:
Alfred-Wegener-Institut fuer Polar- und Meeresforschung
Am Handelshafen 12
City: Bremerhaven
Country: Germany


TAKESHI TAMURA
Role: INVESTIGATOR
Email: tamura.takeshi at nipr.ac.jp
Contact Address:
National Institute of Polar Research
City: Tokyo
Postal Code: 190-0014
Country: Japan


DAIKI NOMURA
Role: INVESTIGATOR
Phone: +47 77 75 06 42
Email: daiki.nomura at npolar.no
Contact Address:
Hokkaido University and Norwegian Polar Institute
Fram Centre
City: Tromso
Postal Code: NO-9296
Country: Norway



Creation and Review Dates
DIF Creation Date: 2013-01-09
Last DIF Revision Date: 2013-01-09

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