Group 2i Isochrysidales produce characteristic alkenones reflecting sea ice distribution
Alkenones are biomarkers produced solely by algae in the order Isochrysidales that have
been used to reconstruct sea surface temperature (SST) since the 1980s. However,
alkenone-based SST reconstructions in the northern high latitude oceans show significant
bias towards warmer temperatures in core-tops, diverge from other SST proxies in down
core records, and are often accompanied by anomalously high relative abundance of the
C37 tetra-unsaturated methyl alkenone (% C37: 4). Elevated% C37: 4 is widely interpreted …
been used to reconstruct sea surface temperature (SST) since the 1980s. However,
alkenone-based SST reconstructions in the northern high latitude oceans show significant
bias towards warmer temperatures in core-tops, diverge from other SST proxies in down
core records, and are often accompanied by anomalously high relative abundance of the
C37 tetra-unsaturated methyl alkenone (% C37: 4). Elevated% C37: 4 is widely interpreted …
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