Important New North American East Coast Proxy Data

Climate Audit

One of my long-standing interests is the location of ocean sediment series that enable apples-to-apples comparison of the 20th century to the mid-Holocene.   These are not nearly as common as one would think.   Ocean sediment series covering the Holocene typically stop prior to the 20th century due to core recovery problems and, on the other hand, high-resolution series (especially from box cores) that provide detailed 20th century information are not necessarily accompanied by corresponding Holocene information (even on “intermediate” resolution.)

Last week, Sicre and coauthors archived two very high resolution alkenone series from Placentia Bay and Bonavista Bay, offshore Newfoundland (5 and 9 years respectively), covering the last two millennium, with their most recent portion dated through the 20th century.   While the proximity is not ideal, the cores do appear to be close enough to three Holocene alkenone SST series from Sachs et al 2007 to compare…

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