GDAC Post-Cruise Metadata form Platform
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Cruise Name: [any identifier (acronyms),Including technical name] / GEOTRACES GP13
Platform Name and type: Research Vessel Southern Surveyor
[vessel, mooring, satellite,, towed vehicle,]
Project: Australasian GEOTRACES: A collaborative international study of the marine biogeochemical cycles of trace elements and their isotopes along a zonal section of the Pacific Ocean east of Australia
Principle funding bodies: Australian Marine National Facility, ACE CRC
[associated project or program name related to funding]
Lead Nation: Australia
Chief scientist (Lead scientist / Principal Investigator) contact details
Name: Dr Andrew R Bowie / Email: / Phone:+61 3 6226 2509
Mailing Address:
Antarctic Climate and Ecosystems CRC
University of Tasmania, Private Bag 80, Hobart, TAS 7001, Australia
Co-Chief scientist contact details: [GEOTRACES point of contact if different from Chief scientist]
Name: Dr Christel Hassler (alternative) / Email: / Phone: +61 2 9514 4159
Mailing Address:
Plant Functional Biology and Climate Change Cluster
Faculty of Science University of Technology, Sydney
POBox 123 Broadway Sydney NSW 2007 Australia
Cruise Details
Start Port and Country: Brisbane (Australia) / Start date: 13 May 2011
End Port and Country: Auckland (New Zealand) / End Date: 5 June 2011
Location: [general description of study area; map if possible]
Tasman Sea, southwest Pacific Ocean (cruise map attached)
Voyage ss2011_v02 undertook a zonal ocean section along the 30oS line of latitude (from 153o30’E to 176oE) and then diverting to 32o30’S and continuing eastwards (from 179oE to 170oW) (Figure 4). This constituted the GEOTRACES GP13 line, with stations re-occupying the CLIVAR P06 line. A full station and event log can be found in Appendix 2.
Cruise Overview: [proposal abstract]
The ocean plays a vital role in Earth’s climate through control of atmospheric carbon dioxide concentrations. One
important component of this system is the iron cycle, in which iron-rich soil dust is transported from land through
atmosphere to ocean. Iron is a key micronutrient for marine plankton productivity, the scarcity of which limits
essential biogeochemical processes and thus ocean fertility. This project will undertake an integrated
oceanographic transect and dust monitoring program for iron, other trace elements, and their isotopes (TEIs) along
the western end of the P06 zonal section (~30oS) east of Australia.
Our innovative measurement and analysis strategy will identify processes and quantify fluxes that control the
distributions of key TEIs in the southwestern Pacific Ocean, and establish the sensitivity of these distributions to
changing environmental conditions. We will use a series of novel techniques to fingerprint the sources, sinks and
internal cycling of TEIs, focussing on the atmospheric delivery of iron-dust to the remote ocean. This project will
provide maximum scientific reward for evaluating future global change, and has strong international collaborative
activity under the auspices of the international GEOTRACES (www.geotraces.org) program.
Outcomes of this project will be an improved ability to predict climate-driven changes in the supply and
biogeochemistry of trace elements in ocean waters around Australia. Our research will quantify the importance of
atmospheric dust for marine ecosystem health, help inform Government policy on ocean iron fertilisation as a
carbon sequestration strategy, and provide a broad basis for evaluating future climatic changes in atmospheric ocean
processes.
Intercalibration activities: Please provide details of how each element was calibrated to meet the requirements of the GEOTRACES programme e.g. use of SaFe standards, collaborative sampling.
Intercalibration (overlap) stations conducted at 30oS 165oE (with PINTS voyage), and 32.5oS 171oW and 32.5oS 170oE (with NZ leg) (the latter also crosses the GEOTRACES meridional transect along 170oW)
Collaborative sampling between different groups and nations
Use of SaFe and GEOTRACES standards as certified samples for all dissolved trace metal analysis
Sampling and sample processing as per GEOTRACES guidelines
Participating labs contributing to GEOTRACES intercalibration activities for suspended particles and aerosols
Some measurement will be duplicated to ensure intercomparability of data: some dissolved and particulate metals will be analysed both by Ellwood’s and Bowie’s groups
List of parameters to be submitted to GDAC: Key parameters listed, please list any other parameters measured and the PI’s contact information. Also include information in regards to the phase i.e. dissolved or particulate and how the samples were collected. i.e. Fe (dissolved)- CTD –Bottle or Fe (Particulate) –Insitu pumps
Trace elements:
Fe
Al
Zn
Mn
Cd
Cu
Pb
Other
Other / Phase and sampling method
Dissolved and particulate
Trace metal rosette (General Oceanics 1018 autonomous rosette fitted with 12x 10 L Niskin-X bottles)
McLane WTS in situ pumps / Contact for each element (PI); [name and email]
Andrew Bowie () and
Michael Ellwood ()
/ Internationally calibrated (Yes or No)
Yes
Radioactive isotopes:
230Th
231Pa
Other
Other
Other
Other
Stable isotopes:
d15N
d13C
Fe
Zn
Cu
Cd / Dissolved and particulate
Trace metal rosette
McLane WTS in situ pumps / Michael Ellwood ()
Claudine Sterling () / No
Radiogenic isotopes:
Nd isotopes
Pb isotopes
Pa
Th / Dissolved and particulate
CTD
McLane WTS in situ pumps / Zanna Chase
() / No
Other parameters:
Fe chemical speciation (Christel Hassler, )
Cu chemical speciation (Michael Ellwood, )
Suwannee River fulvic acid (SRFA)-like compounds (Christel Hassler, )
Pigments and Chl a (Christel Hassler, )
Picoplankton and bacterial abundance (Christel Hassler, )
Photosynthetic health (Fv/Fm) (Christel Hassler, )
Nifh (Philip Boyd, )
Dissolved barium (Frank Dehairs, )
Particulate organic carbon and nitrogen (Andrew Bowie, )
Flow cytometry (glutaraldehyde preserved samples) (bioGEOTRACES) (Penny Chisholm, )
Single cell genomics (glycerol preserved samples) (bioGEOTRACES) (Penny Chisholm, )
qPCR and Metagenomics (bioGEOTRACES) (Penny Chisholm, )
Particulate iron mineralogy (Andrew Bowie, )
Metagenomics and ferredoxin/flavodxin index (Christel Hassler, )
Atmospheric dust collection (Edward Butler, )
Rain collection (Andrew Bowie, )
List CTD hydrographic parameters [sensors including make; salinity, temperature, oxygen, nutrients etc]
CTD Seabird 911 plus sensors:
Temperature Seabird SBE3plus
Conductivity Seabird SBE4C
Depth Paroscientific Digiquartz DMS43K (3000PSIA)
Oxygen Seabird SBE43
Transmissometer Wetlabs C-Star (25mm path / 660nm wavelength)
Profiling fluorometer Chelsea Aquatracker Mk 3 (Chlorophyll-a)
PAR Biospherical Instruments QCP-2300
Salinity and Oxygen sensor was be calibrated by discrete measurement using the Guildline Salinometer and the Automated Photometric Oxygen System built by SCRIPPS respectively.
Nutrients were measured on board using the Lachat FIA Nutrient Analyser.
Typical detection limits are 35nM for nitrates, 12 nM for silicate and 9 nM for phosphate (Marine National Facility).
Low level of nitrate, nitrite and phosphate will be analysed on archived samples using a three-channel nanomolar analyser, combining sensitive segmented flow colorimetric analyticaltechniques with a 2-metre flow-length Liquid Waveguide Capillary Cell [Woodward and 221 Rees, 2001; Woodward, 2002] (C. Law - ()
Particles/Aerosols:
Atmospheric dust was collected on filter(s) using a high-volume sampler (or cascade impactor) with automated sector control. The dust sampler (modified Lear-Siegler PK 2100 Hi-Vol sampler using Whatman 41 filters) was checked and calibrated for flow rate prior the voyage – E. Butler () and P. Boyd ().
Water column particles were sampled as outlined above
List Underway data: [Met data, navigation hull mounted sensors including make and model]
pCO2 – B. Tillbrook (), accuracy +/- 2 uatm.
ADCP- current vector beneath the vessel – 20 minutes averaged
Simrad EA500 sounder (Marine National Facility)
Is there a national data centre: (name and contact) [If not GDAC should be used]
GDAC will be used as the primary means of storing this data.
We will lodge relevant information with national meta-databases. (MarLIN)
Some of this work will also be publicised through a cross-institutional website on marine micronutrients, (http://austracemarine.net). The contact person for the website is M. Ellwood ()
All data listed above which are deemed suitable for the GEOTRACES database will be sent to GDAC in a timeframe from 2-3 years following the voayge.
Other relevant information: