What caused the ice ages? Tiny ocean fossils offer key evidence
Liz Fuller-Wright, Office of Communications,Dec. 10, 2020
https://www.princeton.edu/news/2020/12/10/what-caused-ice-ages-tiny-ocean-fossils-offer-key-evidence
The paper is;
Ai, X.E., Studer, A.S., Sigman, D.M., Martínez-García, A., Fripiat, F.,
Thöle, L.M., Michel, E., Gottschalk, J., Arnold, L., Moretti, S. and
Schmitt, M., 2020. Southern Ocean upwelling, Earth’s obliquity,
and glacial-interglacial atmospheric CO2 change. Science,
370(6522), pp.1348-1352.
Yours,
Paul H.