cc6a0110-2f85-ee42-ebb3-564f2d915c88 eng utf8 dataset pointOfContact NIWA National Institute of Water and Atmospheric Research +64 4 386 0300 voice +64 4 386 0574 facsimile 301 Evans Bay Parade Hataitai Wellington 6021 New Zealand kevin.mackay@niwa.co.nz http://www.niwa.co.nz Website of the National Institute of Water and Atmospheric Research, New Zealand - experts in environmental science Kevin Mackay custodian National Institute of Water and Atmospheric Research curator@niwa.co.nz Data curator 2014-02-21T16:12:01 creation ISO 19115-3 urn:ogc:def:crs:EPSG::4326 OGP NZST/NZDT Physical oceanography during TANGAROA cruise SOIREE 2014-01-17T00:30:00 creation 2014-01-17T00:30:00 revision The Southern Ocean Iron RElease Experiment (SOIREE) was the first in situ iron fertilisation experiment performed in the polar waters of the Southern Ocean. SOIREE was an interdisciplinary study involving participants from six countries, and took place in February 1999 south of the Polar Front in the Australasian-Pacific sector of the Southern Ocean. Approximately 3800 kg of acidified FeSO4.7H2O and 165 g of the tracer sulphur hexafluoride (SF6) were added to a 65-m deep surface mixed layer over an area of ∼50 km2. Initially, mean dissolved iron concentrations were ∼2.7 nM, but decreased to ambient levels within days, requiring subsequent additions of 1550–1750 kg of acidified FeSO4.7H2O on days 3, 5 and 7 of the experiment. During the 13-day site occupation there were iron-mediated increases in phytoplankton growth rates, with marked increases in chlorophyll a (up to 2 μg l−1) and production rates (up to 1.3 g C m−2 d−1). These resulted in subsequent changes in the pelagic ecosystem structure, and in the cycling of carbon, silica and sulphur, such as a 10% drawdown of surface CO2. The SOIREE bloom persisted for >40 days following our departure from the site, as observed via SeaWiFS remotely sensed observations of Ocean Colour. Instruments used: Sea-Bird SBE 911Plus CTD, and; Sea-Tech 25 beamlength 660 nm Transmissometer. The Joint Global Ocean Flux Study (JGOFS) was an international and multi-disciplinary programme with participants from more than 20 nations. JGOFS was launched in 1987 at a planning meeting in Paris under the auspices of the Scientific Committee of Oceanic Research (SCOR), a committee of the International Council for Science (ICSU). Two years later, JGOFS became one of the first core projects of the International Geosphere-Biosphere Programme (IGBP). In the fall of 1988, long-term ocean time-series projects were established at sites near Bermuda and Hawaii, and the following year, the multinational North Atlantic Bloom Experiment (NABE) set up the standard for future process studies in other oceans. Gall, Mark P; Walkington, Matt (2013): Physical oceanography during TANGAROA cruise SOIREE. doi:10.1594/PANGAEA.807840 completed author NIWA Mark Gall PI author NIWA Matt Walkington PI vector oceans 139.406712,-61.124439 139.406712,-60.895278 141.097997,-60.895278 141.097997,-61.124439 139.406712 141.097997 -61.124439 -60.895278 1999-01-11T19:03:00 1999-01-20T23:20:00 southern ocean iron fertilisation CTD unclassified eng https://dc.niwa.co.nz/niwa_dc/srv/metadata/cc6a0110-2f85-ee42-ebb3-564f2d915c88 WWW:LINK-1.0-http--metadata-URL Point of truth URL of this metadata record http://doi.pangaea.de/10.1594/PANGAEA.807840?format=textfile Dataset as tab-delimited text http://doi.pangaea.de/10.1594/PANGAEA.807840 Data record in Pangaea dataset unclassified