measured TEX86 index, which is based on
the number of cyclopentyl and cyclohexyl moieties in isoprenoidal
glycerol dialkyl glycerol tetraether (GDGT) lipids, in surface sediments
and sediment cores from marginal seas and open-ocean
sites in the northwestern Pacific to test the accuracy of TEX86 paleothermometry
in the region. They show highly season and depth
specific production of Archaea and GDGTs they produce due to
unique oceanographic conditions in this region, suggesting that
production of GDGT strongly depends on oceanographic setting.
They conclude that for this index to be usable for reconstructing
surface temperatures, region-specific calibration, rather than a global
core top calibration, is necessary.
measured TEX86 index, which is based onthe number of cyclopentyl and cyclohexyl moieties in isoprenoidalglycerol dialkyl glycerol tetraether (GDGT) lipids, in surface sedimentsand sediment cores from marginal seas and open-oceansites in the northwestern Pacific to test the accuracy of TEX86 paleothermometryin the region. They show highly season and depthspecific production of Archaea and GDGTs they produce due tounique oceanographic conditions in this region, suggesting thatproduction of GDGT strongly depends on oceanographic setting.They conclude that for this index to be usable for reconstructingsurface temperatures, region-specific calibration, rather than a globalcore top calibration, is necessary.
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