@article{fdi:010065418,
  title = {{O}n the {S}outhern {O}cean {CO}2 uptake and the role of the biological carbon pump in the 21st century},
  author = {{H}auck, {J}. and {V}olker, {C}. and {W}olf-{G}ladrow, {D}. {A}. and {L}aufkotter, {C}. and {V}ogt, {M}. and {A}umont, {O}livier and {B}opp, {L}. and {B}uitenhuis, {E}. {T}. and {D}oney, {S}. {C}. and {D}unne, {J}. and {G}ruber, {N}. and {H}ashioka, {T}. and {J}ohn, {J}. and {L}e {Q}uere, {C}. and {L}ima, {I}. {D}. and {N}akano, {H}. and {S}eferian, {R}. and {T}otterdell, {I}.},
  editor = {},
  language = {{ENG}},
  abstract = {{W}e use a suite of eight ocean biogeochemical/ecological general circulation models from the {M}arine {E}cosystem {M}odel {I}ntercomparison {P}roject and {C}oupled {M}odel {I}ntercomparison {P}roject {P}hase 5 archives to explore the relative roles of changes in winds (positive trend of {S}outhern {A}nnular {M}ode, {SAM}) and in warming- and freshening-driven trends of upper ocean stratification in altering export production and {CO}2 uptake in the {S}outhern {O}cean at the end of the 21st century. {T}he investigated models simulate a broad range of responses to climate change, with no agreement on a dominance of either the {SAM} or the warming signal south of 44 degrees {S}. {I}n the southernmost zone, i.e., south of 58 degrees {S}, they concur on an increase of biological export production, while between 44 and 58 degrees {S} the models lack consensus on the sign of change in export. {Y}et in both regions, the models show an enhanced {CO}2 uptake during spring and summer. {T}his is due to a larger {CO}2(aq) drawdown by the same amount of summer export production at a higher {R}evelle factor at the end of the 21st century. {T}his strongly increases the importance of the biological carbon pump in the entire {S}outhern {O}cean. {I}n the temperate zone, between 30 and 44 degrees {S}, all models show a predominance of the warming signal and a nutrient-driven reduction of export production. {A}s a consequence, the share of the regions south of 44 degrees {S} to the total uptake of the {S}outhern {O}cean south of 30 degrees {S} is projected to increase at the end of the 21st century from 47 to 66% with a commensurable decrease to the north. {D}espite this major reorganization of the meridional distribution of the major regions of uptake, the total uptake increases largely in line with the rising atmospheric {CO}2. {S}imulations with the {MIT}gcm-{RE}co{M}2 model show that this is mostly driven by the strong increase of atmospheric {CO}2, with the climate-driven changes of natural {CO}2 exchange offsetting that trend only to a limited degree (approximate to 10%) and with negligible impact of climate effects on anthropogenic {CO}2 uptake when integrated over a full annual cycle south of 30 degrees {S}.},
  keywords = {ocean carbon sink ; export production ; {CMIP}5 ; {S}outhern {A}nnular {M}ode ; polar carbon cycle ; ecosystem model intercomparison ; {OCEAN} {AUSTRAL}},
  booktitle = {},
  journal = {{G}lobal {B}iogeochemical {C}ycles},
  volume = {29},
  numero = {9},
  pages = {1451--1470},
  ISSN = {0886-6236},
  year = {2015},
  DOI = {10.1002/2015gb005140},
  URL = {https://www.documentation.ird.fr/hor/fdi:010065418},
}