Paleoceanography of sediment cores SO202-27-6 during MIS 3

The modern subarctic Pacific is characterized by a steep salinity-driven surface water stratification, which hampers the supply of saline and nutrient-rich deeper waters into the euphotic zone, limiting productivity. However, the strength of the halocline might have varied in the past. Here, we pres...

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Bibliographic Details
Main Author: Maier, Edith
Format: Other/Unknown Material
Language:English
Published: PANGAEA 2014
Subjects:
AWI_Paleo
Paleoenvironmental Reconstructions from Marine Sediments @ AWI
Greenland
Greenland ice cores
Subarctic
Alaska
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.834413
https://doi.org/10.1594/PANGAEA.834413
Description
Summary:The modern subarctic Pacific is characterized by a steep salinity-driven surface water stratification, which hampers the supply of saline and nutrient-rich deeper waters into the euphotic zone, limiting productivity. However, the strength of the halocline might have varied in the past. Here, we present diatom oxygen (d18Odiat) and silicon (d30Sidiat) stable isotope data from the open subarctic North-East (NE) Pacific (SO202-27-6; Gulf of Alaska), in combination with other proxy data (Neogloboquadrina pachydermasin d18O, biogenic opal, Ca and Fe intensities, IRD), to evaluate changes in surface water hydrography and productivity during Marine Isotope Stage (MIS) 3, characterized by millennial-scale temperature changes (Dansgaard-Oeschger (D-O) cycles) documented in Greenland ice cores.

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