@article{fdi:010073058,
  title = {{M}ountain ranges, climate and weathering. {D}o orogens strengthen or weaken the silicate weathering carbon sink ?},
  author = {{M}affre, {P}. and {L}adant, {J}. {B}. and {M}oquet, {J}. {S}. and {C}arretier, {S}{\'e}bastien and {L}abat, {D}. and {G}odderis, {Y}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he role of mountains in the geological evolution of the carbon cycle has been intensively debated for the last decades. {M}ountains are thought to increase the local physical erosion, which in turns promotes silicate weathering, organic carbon transport and burial, and release of sulfuric acid by dissolution of sulfides. {I}n this contribution, we explore the impact of mountain ranges on silicate weathering. {M}ountains modify the global pattern of atmospheric circulation as well as the local erosion conditions. {U}sing an {IPCC}-class climate model, we first estimate the climatic impact of mountains by comparing the present day climate with the climate when all the continents are assumed to be flat. {W}e then use these climate output to calculate weathering changes when mountains are present or absent, using standard expression for physical erosion and a 1{D} vertical model for rock weathering. {W}e found that large-scale climate changes and enhanced rock supply by erosion due to mountain uplift have opposite effect, with similar orders of magnitude. {A} thorough testing of the weathering model parameters by data-model comparison shows that best-fit parameterizations lead to a decrease of weathering rate in the absence of mountain by about 20%. {H}owever, we demonstrate that solutions predicting an increase in weathering in the absence of mountain cannot be excluded. {A} clear discrimination between the solutions predicting an increase or a decrease in global weathering is pending on the improvement of the existing global databases for silicate weathering. {N}evertheless, imposing a constant and homogeneous erosion rate for models without relief, we found that weathering decrease becomes unequivocal for very low erosion rates (below 10 t(km(2)/yr). {W}e conclude that further monitoring of continental silicate weathering should be performed with a spatial distribution allowing to discriminate between the various continental landscapes (mountains, plains ...).},
  keywords = {weathering ; erosion ; modeling ; regression ; parameter sensitivity ; {MONDE}},
  booktitle = {},
  journal = {{E}arth and {P}lanetary {S}cience {L}etters},
  volume = {493},
  numero = {},
  pages = {174--185},
  ISSN = {0012-821{X}},
  year = {2018},
  DOI = {10.1016/j.epsl.2018.04.034},
  URL = {https://www.documentation.ird.fr/hor/fdi:010073058},
}