TY - JOUR A1 - Badger, M. P. S. T1 - Alkenone isotopes show evidence of active carbon concentrating mechanisms in coccolithophores as aqueous carbon dioxide concentrations fall below 7 µmol L−1 JO - Biogeosciences J1 - BG VL - 18 IS - 3 SP - 1149 EP - 1160 Y1 - 2021/02/15 PB - Copernicus Publications SN - 1726-4189 UR - https://bg.copernicus.org/articles/18/1149/2021/ L1 - https://bg.copernicus.org/articles/18/1149/2021/bg-18-1149-2021.pdf DO - 10.5194/bg-18-1149-2021 ER -