At-sea high-resolution chemical mapping: extreme barium depletion in North Pacific surface water

We have modified an inductively coupled plasma mass spectrometer (ICPMS) for use at sea, which permits mapping of dissolved Ba at high temporal and spatial resolution. While evaluating this system off the Pacific coast of Baja California, we discovered Ba depletion greater than 60% in surface waters...

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Bibliographic Details
Published in:Marine chemistry 2002-08, Vol.79 (2), p.67-79
Main Authors: Esser, Bradley K, Volpe, Alan M
Format: Article
Language:English
Subjects:
Acantharia
Analytical techniques
Barium
Biological production
Earth sciences
Earth, ocean, space
Exact sciences and technology
External geophysics
Geochemistry
Marine
Mexico/Baja California/Pacific Ocean
Mineralogy
Nutrient cycles
Physical and chemical properties of sea water
Physics of the oceans
Plankton
Silicates
Strontium
Water geochemistry
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Summary:We have modified an inductively coupled plasma mass spectrometer (ICPMS) for use at sea, which permits mapping of dissolved Ba at high temporal and spatial resolution. While evaluating this system off the Pacific coast of Baja California, we discovered Ba depletion greater than 60% in surface waters over tens of kilometers. Observed Ba abundance is among the lowest reported in any ocean water. No corresponding depletion was seen in Sr, which strongly suggests that acantharians are not the primary source of biogenic Ba in these surface waters.
ISSN:0304-4203
1872-7581
DOI:10.1016/S0304-4203(02)00037-3