Browsing Faculty Research Publications (College of Earth, Ocean, and Atmospheric Sciences) by Author "van Geen, Alexander"

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Distribution and variability of iron input to Oregon coastal waters during the upwelling season

Chase, Zanna; Hales, Burke; Cowles, Timothy J.; Schwartz, Roseanne; van Geen, Alexander (American Geophysical Union, 2005-09-09)

We measured iron concentrations off the Oregon coast in spring (May–June) and summer (August) of 2001 as part of the Coastal Ocean Advances in Shelf Transport (COAST) program. Dissolvable and total dissolvable iron lev ...
High-frequency measurement of seawater chemistry: Flow-injection analysis of macronutrients

Hales, Burke; van Geen, Alexander; Takahashi, Taro (American Society of Limnology and Oceanography, 2004-03)

We adapted a commercially available flow-injection autoanalyzer (Lachat Quik-Chem 8000) to measure seawater nitrate concentrations at a rate of nearly 0.1 Hz and phosphate and silicate concentrations at a rate half tha ...
Iron, nutrient, and phytoplankton distributions in Oregon coastal waters

Chase, Zanna; van Geen, Alexander; Kosro, P. Michael, 1951-; Marra, John; Wheeler, Patricia A. (American Geophysical Union, 2002-10-25)

The relationship between iron and nitrate concentrations was examined off the coast of Oregon during the upwelling season. Surface Fe and N (nitrate + nitrite) concentrations measured underway by flow injection analysi ...