TY  - JOUR
A1  - Haug, Gerald H.
A1  - Sigman, Daniel M.
T1  - Palaeoceanography : polar twins
N2  - Ice ages in the North Pacific Ocean and the Southern Ocean were marked by low productivity. Accumulating evidence indicates that strong stratification restricted the supply of nutrients from the deep ocean to the algae of the sunlit surface in these regions.
Y1  - 2009
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/11330
UR  - http://www.nature.com/ngeo
SN  - 1752-0894
ER  -