BIOGEOCHEMICAL ASSESSMENT OF ALKENONE EXPORT DEPTH IN THE SUMMERTIME EUPHOTIC ZONE OF THE GULF OF CALIFORNIA

摘要

Stratigraphic analysis of alkenone unsaturation patterns(U_(37)~k')in marine sediment cores now provides paleoceanographers a valuable tool for reconstruction of past sea surface temperatures(SST).Although most promising,results from such reconstructions nonetheless still bear uncertainty given current unknowns about when during the year this phytoplankton-derived biomarker signal is exported from surface waters,where in the euphotic zone the export originates and how such oceanographic details vary from region to region.