TY - GEN AU - Jaccard,S L AU - Hayes,C T AU - Martínez-García,A AU - Hodell,D A AU - Anderson,R F AU - Sigman,D M AU - Haug,G H TI - Two modes of change in Southern Ocean productivity over the past million years SN - 1095-9203 PY - 2013///0401 KW - Antarctic Regions KW - Atmosphere KW - Carbon Cycle KW - Carbon Dioxide KW - analysis KW - Climate KW - Geologic Sediments KW - chemistry KW - Ice Cover KW - Iron KW - Oceans and Seas KW - Phytoplankton KW - growth & development KW - Seawater KW - Time N1 - Publication Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S UR - https://doi.org/10.1126/science.1227545 ER -