The ocean's nitrogen budget has escaped quantification. A modelling study shows how a small shift in the nitrate-to-phosphate uptake ratio of phytoplankton has a large effect on calculated nitrogen fixation rates.
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Wolfgang Koeve and Paul Kähler are in the Department of Biogeochemical Modelling, Leibniz-Institut für Meereswissenschaften, Düsternbrooker Weg 20, D-24105 Kiel, Germany.
- Wolfgang Koeve
- & Paul Kähler
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Correspondence to Wolfgang Koeve.
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