Auxiliary material for this article contains four figures that provide additional details of our measurement methods

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grl27471-sup-0001-readme.txtplain text document3Kreadme.txt
grl27471-sup-0002-fs01.tifTIFF image3349KFigure S1. Box size over which measurements for Figure 1b were averaged.
grl27471-sup-0003-fs02.pdfPDF document25KFigure S2. Changing dune area fraction down dune field.
grl27471-sup-0004-fs03.tifTIFF image4518KFigure S3. Circle size over which measurements for Figure 2a were averaged.
grl27471-sup-0005-fs04.pdfPDF document24KFigure S4. An alternative bulk estimate of erosion rates over the barchan dune of Figure 2.

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