Western Mediterranean Climate Response to Dansgaard/Oeschger Events: New Insights From Speleothem Records

Alternative Title

Geophysical Research Letters

Publication Date

7-29-2019

Volume Number

46

Issue Number

15

Abstract

The climate of the western Mediterranean was characterized by a strong precipitation gradient during the Holocene driven by atmospheric circulation patterns. The scarcity of terrestrial paleoclimate archives has precluded exploring this hydroclimate pattern during Marine Isotope Stages 5 to 3. Here we present stable carbon and oxygen isotope records from three flowstones from southeast Iberia, which show that Dansgaard/Oeschger events were associated with more humid conditions. This is in agreement with other records from the Iberian Peninsula, the Mediterranean, and western Europe, which all responded in a similar way to millennial-scale climate variability in Greenland. This general increase in precipitation during Dansgaard/Oeschger events cannot be explained by any present-day or Holocene winter atmospheric circulation pattern. Instead, we suggest that changes in sea surface temperature played a dominant role in determining precipitation amounts in the western Mediterranean.

Keywords

Spain, Last glacia, Marine Isotope Stage 3, Speleothem

Document Type

Article

Digital Object Identifier (DOI)

https://doi.org/10.1029/2019GL084009

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