jpy12123-sup-0001-AppendxiS1.docxWord document1555KFigure S1. HOOH production in buffer-treated media incubated (A) in the dark or (B) in light-exposed milli-Q water (i.e., without seawater solutes). Buffers are at 10 mM. Error bars are the SE of three replicate treatments.
jpy12123-sup-0002-AppendxiS2.docxWord document1555KFigure S2. HOOH dynamics over time for illuminated natural seawater treated with a variety of buffers (at 10 mM). Plotted are the results of individual samples. Black arrows indicate “asymptotes,” discussed in the text.
jpy12123-sup-0003-FigS1.docxWord document432KFigure S3. A comparison of the long-term HOOH production rate in buffered media with and without the presence of O2. Error bars are the SE of three replicate samples.
jpy12123-sup-0004-FigS2.docxWord document1151KTable S1. Buffers studied in this work.
jpy12123-sup-0005-FigS3.docxWord document299KTable S2. Multiple linear regression of kHOOH versus medium characteristics.
jpy12123-sup-0006-TableS1.docxWord document30KAppendix S1. Detailed methods.
jpy12123-sup-0007-TableS2.docxWord document40KAppendix S2. Suggestions for preparation of phytoplankton growth media.

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