Late-Glacial to Holocene changes in winds, upwelling, and seasonal production of the northern California current system

Auteurs :
SANCETTA, C.
LYLE, M.
HEUSSER, L.
ZAHN, R.
PLATT BRADBURY, J.

Description :
A core 120 km off the coast of southern Oregon was examined for changes in lithology, diatoms, and pollen over the past 30,000 yr. Primary production during the late Pleistocene was about half that of the Holocene. The findings verify predictions of a climate model based on glacial maximum conditions. There is no compelling evidence for a climatic reversal corresponding to the European Younger Dryas chron. During the early Holocene there may have been years when winds were insufficiently strong to support upwelling, so that warm stratified waters lay closer to the coast.


Type de document :
Article de périodique

Source :
Quaternary research, issn : 0033-5894, 1992, vol. 38, n°. 3, p. 359-370, Collation : Illustration, Références bibliographiques : 40 réf.

Date :
1992

Editeur :
Pays édition : Etats-Unis, San Diego, CA, Elsevier