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Evolution of the south Pacific helium plume over the past three decades
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2017
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Source: Geochemistry, Geophysics, Geosystems, 18(5), 1810-1823
[PDF-2.90 MB]
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Journal Title:Geochemistry, Geophysics, Geosystems
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NOAA Program & Office:
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Description:The recent GEOTRACES Eastern Pacific Zonal Tra nsect in 2013 crossed the East Pacific Rise at 158S following the same track as the 1987 Helios Expedition along the core of the mid-depth helium plume that spreads westward from the East Pacific Rise (EPR) axis. The fact that several stations were co- located with the earlier Helios stations has allowe dad e t a i l e dc o m p a r i s o no ft he changes in the helium plume over the intervening 26 years. While the p lume in many areas is unc hanged, there is a marked decrease in plume intensity at longitude 120 8W in the 2013 data which was not present in 1987. Recent radioisotope measurements along the plume track suggest that this decrease is due to the intrusion of a
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Source:Geochemistry, Geophysics, Geosystems, 18(5), 1810-1823
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DOI:
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ISSN:1525-2027
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Rights Information:Other
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