@article{fdi:010086652,
  title = {{M}odified future diurnal variability of the global surface ocean {CO}2 system},
  author = {{K}wiatkowski, {L}. and {T}orres, {O}. and {A}umont, {O}livier and {O}rr, {J}. {C}.},
  editor = {},
  language = {{ENG}},
  abstract = {{O}ur understanding of how increasing atmospheric {CO}2 and climate change influences the marine {CO}2 system and in turn ecosystems has increasingly focused on perturbations to carbonate chemistry variability. {T}his variability can affect ocean-climate feedbacks and has been shown to influence marine ecosystems. {T}he seasonal variability of the ocean {CO}2 system has already changed, with enhanced seasonal variations in the surface ocean p{CO}(2) over recent decades and further amplification projected by models over the 21st century. {M}esocosm studies and {CO}2 vent sites indicate that diurnal variability of the {CO}2 system, the amplitude of which in extreme events can exceed that of mean seasonal variability, is also likely to be altered by climate change. {H}ere, we modified a global ocean biogeochemical model to resolve physically and biologically driven diurnal variability of the ocean {CO}2 system. {F}orcing the model with 3-h atmospheric outputs derived from an {E}arth system model, we explore how surface ocean diurnal variability responds to historical changes and project how it changes under two contrasting 21st-century emission scenarios. {C}ompared to preindustrial values, the global mean diurnal amplitude of p{CO}(2) increases by 4.8 mu atm (+226%) in the high-emission scenario but only 1.2 mu atm (+55%) in the high-mitigation scenario. {T}he probability of extreme diurnal amplitudes of p{CO}(2) and [{H}+] is also affected, with 30- to 60-fold increases relative to the preindustrial under high 21st-century emissions. {T}he main driver of heightened p{CO}(2) diurnal variability is the enhanced sensitivity of p{CO}(2) to changes in temperature as the ocean absorbs atmospheric {CO}2. {O}ur projections suggest that organisms in the future ocean will be exposed to enhanced diurnal variability in p{CO}(2) and [{H}+], with likely increases in the associated metabolic cost that such variability imposes.},
  keywords = {climate change ; {CO}2 ; diel ; diurnal ; marine carbonate chemistry ; ocean acidification ; {MONDE}},
  booktitle = {},
  journal = {{G}lobal {C}hange {B}iology},
  volume = {[{E}arly access]},
  numero = {},
  pages = {[16 p.]},
  ISSN = {1354-1013},
  year = {2022},
  DOI = {10.1111/gcb.16514},
  URL = {https://www.documentation.ird.fr/hor/fdi:010086652},
}