FN Archimer Export Format
PT J
TI Sensitivity of Holocene East Antarctic productivity to subdecadal variability set by sea ice
BT 
AF Johnson, Katelyn M.
   McKay, Robert M.
   Etourneau, Johan
   Jiménez-Espejo, Francisco J.
   Albot, Anya
   Riesselman, Christina R.
   Bertler, Nancy A. N.
   Horgan, Huw J.
   Crosta, Xavier
   Bendle, James
   Ashley, Kate E.
   Yamane, Masako
   Yokoyama, Yusuke
   Pekar, Stephen F.
   Escutia, Carlota
   Dunbar, Robert B.
AS 1:1,2;2:2;3:3,4,5;4:3,6;5:2;6:7,8;7:1,2;8:2;9:5;10:9;11:9;12:10;13:11;14:12;15:3;16:13;
FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;10:;11:;12:;13:;14:;15:;16:;
C1 GNS Science, Lower Hutt, New Zealand
   Antarctic Research Centre, Victoria University of Wellington, Wellington, New Zealand
   Andaluz Institute of Earth Sciences, CSIC-University of Granada, Granada, Spain
   EPHE, PSL University, Paris, France
   UMR 5805 EPOC CNRS, University of Bordeaux, Bordeaux, France
   Biogeochemistry Center, JAMSTEC, Yokosuka, Japan
   Department of Geology, University of Otago, Dunedin, New Zealand
   Department of Marine Science, University of Otago, Dunedin, New Zealand
   School of Geography, Earth, and Environmental Sciences, University of Birmingham, Birmingham, UK
   Institute for Space–Earth Environmental Research (ISEE), Nagoya University, Nagoya, Japan
   Analytical Center for Environmental Study, Atmosphere and Ocean Research Institute, University of Tokyo, Kashiwa, Japan
   School of Earth and Environmental Sciences, City University of New York - Queens College, New York, NY, USA
   School of Earth, Energy, and Environmental Sciences, Stanford University, Stanford, CA, USA
C2 GNS SCIENCE, NEW ZEALAND
   UNIV WELLINGTON VICTORIA, NEW ZEALAND
   CSIC, SPAIN
   EPHE, FRANCE
   UNIV BORDEAUX, FRANCE
   JAMSTEC, JAPAN
   UNIV OTAGO, NEW ZEALAND
   UNIV OTAGO, NEW ZEALAND
   UNIV BIRMINGHAM, UK
   UNIV NAGOYA, JAPAN
   UNIV TOKYO, JAPAN
   UNIV NEW YORK, USA
   UNIV STANFORD, USA
IF 21.531
TC 4
UR https://archimer.ifremer.fr/doc/00722/83378/88352.pdf
   https://archimer.ifremer.fr/doc/00722/83378/88353.pdf
LA English
DT Article
CR MD 130 / CADO
BO Marion Dufresne
AB ntarctic sea-ice extent, primary productivity and ocean circulation represent interconnected systems that form important components of the global carbon cycle. Subdecadal to centennial-scale variability can influence the characteristics and interactions of these systems, but observational records are too short to evaluate the impacts of this variability over longer timescales. Here, we use a 170-m-long sediment core collected from Integrated Ocean Drilling Program Site U1357B, offshore Adélie Land, East Antarctica to disentangle the impacts of sea ice and subdecadal climate variability on phytoplankton bloom frequency over the last ~11,400 years. We apply X-ray computed tomography, Ice Proxy for the Southern Ocean with 25 carbon atoms, diatom, physical property and geochemical analyses to the core, which contains an annually resolved, continuously laminated archive of phytoplankton bloom events. Bloom events occurred annually to biennially through most of the Holocene, but became less frequent (~2–7 years) at ~4.5 ka when coastal sea ice intensified. We propose that coastal sea-ice intensification subdued annual sea-ice break-out, causing an increased sensitivity of sea-ice dynamics to subdecadal climate modes, leading to a subdecadal frequency of bloom events. Our data suggest that projected loss of coastal sea ice will impact the influence of subdecadal variability on Antarctic margin primary productivity, altering food webs and carbon-cycling processes at seasonal timescales. 
PY 2021
PD OCT
SO Nature Geoscience
SN 1752-0894
PU Springer Science and Business Media LLC
VL 14
IS 10
UT 000695635300002
BP 762
EP 768
DI 10.1038/s41561-021-00816-y
ID 83378
ER

EF