Auxiliary material for Paper 2009gb003500 Biogeochemical iron budgets of the Southern Ocean south of Australia demonstrate that summertime supply decouples iron and nutrient cycles in the subantarctic zone Andrew R. Bowie, Delphine Lannuzel, and Tomas A. Remenyi Antarctic Climate and Ecosystems CRC, University of Tasmania, Hobart, Tasmania, Australia Thibaut Wagener Laboratoire d'Océanographie de Villefranche sur Mer, Université Pierre et Marie Curie, Villefranche sur Mer, France Phoebe J. Lam Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts, USA Philip W. Boyd NIWA Centre for Chemical and Physical Oceanography, Department of Chemistry, University of Otago, Dunedin, New Zealand Cécile Guieu Laboratoire d'Océanographie de Villefranche sur Mer, Université Pierre et Marie Curie, Villefranche sur Mer, France Ashley T. Townsend Central Science Laboratory, University of Tasmania, Hobart, Tasmania, Australia Thomas W. Trull Antarctic Climate and Ecosystems CRC, University of Tasmania, Hobart, Tasmania, Australia CSIRO Marine and Atmospheric Research, Castray Esplanade, Hobart, Tasmania, Australia Institute of Antarctic and Southern Ocean Studies, University of Tasmania, Hobart, Tasmania, Australia Bowie, A. R., D. Lannuzel, T. A. Remenyi, T. Wagener, P. J. Lam, P. W. Boyd, C. Guieu, A. T. Townsend, and T. W. Trull (2009), Biogeochemical iron budgets of the Southern Ocean south of Australia demonstrate that summertime supply decouples iron and nutrient cycles in the sub-Antarctic zone, Global Biogeochem. Cycles, 23, GB4034, doi:10.1029/2009GB003500. Introduction This auxiliary material contains supplementary information (1 text file), data (2 tables) and figures (4) used in the preparation of the above manuscript. 1. 2009gb003500-txts01.doc. Details of the sampling and analytical Methods used for the measurement of the following parameters reported in the paper: Dissolved trace metals, Particulate trace metals, Iron uptake and remineralization, Aerosols, and Particulate organic carbon. 2. 2009gb003500-ts01.txt. Aluminium, iron and dust concentrations in aerosols and solubility of atmospheric iron in seawater in the collected aerosols. Footnote 1: Calculated from the aluminium concentration assuming 7.7% (by mass) aluminium concentration in crustal particulate matter [Wedepohl, 1995]. Footnote 2: N/A = no data available 3. 2009gb003500-ts02.txt. Estimated dust, total iron and dissolved iron flux estimations for each of the three process stations P1, P2 and P3. Value for the “SO” column represents the first best estimate of mineral dust fluxes over the open Southern Ocean region occupied during the SAZ-Sense cruise. 4. 2009gb003500-fs01.pdf. Location of aerosol sample collection superimposed on SAZ-Sense voyage track. Airmass back trajectories over 24 h at the position of the ship at 12:00 (UTC) for every sampling day are shown. 5. 2009gb003500-fs02.pdf. Trace metal stations sampled during SAZ-Sense, numbered according to the nearest CTD cast. Long term process stations and transect lines are also shown. Figure prepared using Ocean Data View (R. Schlitzer, available from http://odv.awi.de). 6. 2009gb003500-fs03.pdf. Vertical profiles of particulate trace metals (iron, aluminium and manganese) and hydrography (temperature, salinity and dissolved oxygen) at station 23 (CTD 105) located at 150.2oE, 44.2oS, on the northeast transect from P3 to Hobart. 7. 2009gb003500-fs04.pdf. Active fires in Tasmania on the 18 February 2007 detected from MODIS Terra and Aqua satellite sensors (data from http://maps.geog.umd.edu/firms), and UV Aerosol Index (AI) from the OMI instrument on the same day (data from http://disc.sci.gsfc.nasa.gov/techlab/giovanni), indicating an important smoke plume when sampling AeroSAZ-8. Locations of transect stations 23 and 24 are shown (white circles).