Browsing by Author "Johnson K.S."

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GEOCHEMISTRY OF BARIUM IN MARINE SEDIMENTS: IMPLICATIONS FOR ITS USE AS A PALEOPROXY - RESULTS FROM SITES 680, 682, 685, AND 688

McManus J.; Berelson W.M.; Klinkhammer G.P.; Johnson K.S.; Coale K.H.; Anderson R.F.; Kumar N.; Burdige D.J.; Hammond D.E.; Brumsack H.J.; McCorkle D.C.; Rushdi A. (1998)

Variations in the accumulation rate of barium in marine sediments are thought to be indicative of variations in marine biological productivity through time. However, the use of Ba as a proxy for paleoproductivity is partly ...
ON THE FORMATION OF THE MANGANESE MAXIMUM IN THE OXYGEN MINIMUM

Johnson K.S.; Coale K.H.; Berelson W.M.; Gordon R.M. (1996)

A simple model that accounts for the formation of the Mn maximum in the oxygen minimum is presented here. In this model, Mn is proposed to cycle in a constant proportion to carbon, as do nitrogen and phosphorous. Superimposed ...
OXIDATION KINETICS OF MANGANESE (II) IN SEAWATER AT NANOMOLAR CONCENTRATIONS

von Langen P.J.; Johnson K.S.; Coale K.H.; Elrod V.A. (1997)

Manganese oxidation rates were determined at low (#20 nM) concentrations in seawater by measuring dissolved manganese (Mn(II)) using flow injection analysis with chemiluminescence detection. Mn(II) was measured in samples ...

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