Articles | Volume 16, issue 1
Clim. Past, 16, 299–313, 2020
Clim. Past, 16, 299–313, 2020

Research article 14 Feb 2020

Research article | 14 Feb 2020

Late Pliocene Cordilleran Ice Sheet development with warm northeast Pacific sea surface temperatures

Maria Luisa Sánchez-Montes et al.

Data sets

Alkenone sea surface temperatures, ice rafted debris, terrestrial/aquatic n-alkane ratio, pollen counts and a new age and depth models from IODP Expedition 341 Site U1417, Gulf of Alaska. M. L. Sánchez-Montes, E. L. McClymont, J. M. Lloyd, J. Müller, E. A. Cowan, and C. Zorzi

Short summary
In this paper, we present new climate reconstructions in SW Alaska from recovered marine sediments in the Gulf of Alaska. We find that glaciers reached the Gulf of Alaska during a cooling climate 2.9 million years ago, and after that the Cordilleran Ice Sheet continued growing during a global drop in atmospheric CO2 levels. Cordilleran Ice Sheet growth could have been supported by an increase in heat supply to the SW Alaska and warm ocean evaporation–mountain precipitation mechanisms.