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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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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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description	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.
doi_str_mv	10.1016/S0304-4203(02)00037-3
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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
title	At-sea high-resolution chemical mapping: extreme barium depletion in North Pacific surface water
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