Auxiliary material for Paper 2011GL048315 Nitrogen fixation in the South Atlantic Gyre and the Benguela Upwelling System Jill A. Sohm Department of Biological Sciences, University of Southern California, Los Angeles, California, USA Jason A. Hilton 2Department of Ocean Sciences, University of California, Santa Cruz, California, USA Abigail E. Noble Marine Chemistry and Geochemistry Department, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts, USA Jonathan P. Zehr Department of Ocean Sciences, University of California, Santa Cruz, California, USA Mak A. Saito Marine Chemistry and Geochemistry Department, Woods Hole Oceanographic Institution, Woods Hole, Woods Hole, Massachusetts, USA Eric A. Webb Department of Biological Sciences, University of Southern California, Los Angeles, California, USA Sohm, J. A., J. A. Hilton, A. E. Noble, J. P. Zehr, M. A. Saito, and E. A. Webb (2011), Nitrogen fixation in the South Atlantic Gyre and the Benguela Upwelling System, Geophys. Res. Lett., 38, L16608, doi:10.1029/2011GL048315. Introduction This supplementary file contains one table. 1. 2011gl048315-ts01.docx The abundance at the surface and with depth of two unicellular diazotrophic cyanobacteria (UCYN-A and Crocosphaera), as determined with qPCR of the nifH gene. These samples were collected in the South Atlantic Gyre and Benguela Upwelling in November/December 2007, and the samples were processed and data generated in the lab of Jonathan Zehr.