@article{fdi:010081603, title = {{DMS} atmospheric concentrations and sulphate aerosol indirect radiative forcing: a sensitivity study to the {DMS} source representation and oxidation}, author = {{B}oucher, {O}. and {M}oulin, {C}. and {B}elviso, {S}. and {A}umont, {O}livier and {B}opp, {L}. and {C}osme, {E}. and {V}on {K}uhlmann, {R}. and {L}awrence, {M}.{G}. and {P}ham, {M}. and {R}eddy, {M}.{S}. and {S}ciare, {J}. and {V}enkataraman, {C}.}, editor = {}, language = {{ENG}}, abstract = {{T}he global sulphur cycle has been simulated using a general circulation model with a focus on the source and oxidation of atmospheric dimethylsulphide ({DMS}). {T}he sensitivity of atmospheric {DMS} to the oceanic {DMS} climatology, the parameterisation of the sea-air transfer and to the oxidant fields have been studied. {T}he importance of additional oxidation pathways (by {O}3 in the gas- and aqueous-phases and by {B}r{O} in the gas phase) not incorporated in global models has also been evaluated. {W}hile three different climatologies of the oceanic {DMS} concentration produce rather similar global {DMS} fluxes to the atmosphere at 24-27 {T}g {S} yr -1, there are large differences in the spatial and seasonal distribution. {T}he relative contributions of {OH} and {NO}3 radicals to {DMS} oxidation depends critically on which oxidant fields are prescribed in the model. {O}xidation by {O}3 appears to be significant at high latitudes in both hemispheres. {O}xidation by {B}r{O} could be significant even for {B}r{O} concentrations at sub-pptv levels in the marine boundary layer. {T}he impact of such refinements on the {DMS} chemistry onto the indirect radiative forcing by anthropogenic sulphate aerosols is also discussed.}, keywords = {}, booktitle = {}, journal = {{A}tmospheric {C}hemistry and {P}hysics}, volume = {3}, numero = {1}, pages = {49--65}, year = {2003}, DOI = {10.5194/acp-3-49-2003}, URL = {https://www.documentation.ird.fr/hor/fdi:010081603}, }