@article{fdi:010083142, title = {{R}edistribution of riverine and rainfall freshwater by the {B}ay of {B}engal circulation}, author = {{C}haitanya, {A}. {V}. {S}. and {V}ialard, {J}{\'e}r{\^o}me and {L}engaigne, {M}atthieu and {D}'{O}vidio, {F}. and {R}iotte, {J}ean and {P}apa, {F}abrice and {J}ames, {R}. {A}.}, editor = {}, language = {{ENG}}, abstract = {{W}e use satellite-derived currents and a {L}agrangian approach to investigate the redistribution of the precipitation minus evaporation ({P}-{E}) and river freshwater inputs into {B}ay of {B}engal ({B}o{B}) by the oceanic circulation. {W}e find a key role of {E}kman transport in shaping the {B}o{B} freshwater distribution. {U}ntil {S}eptember, the summer monsoon winds induce eastward {E}kman transport, which maintains freshwater near its major rivers and rain sources in the northeastern {B}o{B}. {T}he winter monsoon {E}kman transport strongly contributes to the surface flow in many areas of the interior {B}o{B}. {T}his similar to 0.15 m s(-1) westward transport overcomes the weaker offshore transport by mesoscale motions and pushes a similar to 40/45% mixture of {P}-{E} and {G}anges-{B}rahmaputra freshwater into the {E}ast {I}ndian {C}oastal {C}urrent ({EICC}). {I}n agreement with previous studies, we find that the {EICC} then transports {G}anges-{B}rahmaputra freshwater southward, allowing the formation of a narrow freshwater tongue or "river in the sea" along the coast east of {I}ndia in {N}ovember. {E}kman transport thus operates jointly with the {EICC} to allow the "river in the sea" formation. {T}he {EICC} is nonetheless a "leaky pipe" as only similar to 22% of the {G}anges-{B}rahmaputra, and similar to 9% of the {P}-{E} monsoonal freshwater inputs exit the {B}o{B} near {S}ri {L}anka. {T}he winter monsoon anticyclonic circulation in fact brings more rain freshwater from the equatorial {I}ndian {O}cean into the southeastern {B}o{B} than it exports freshwater through the {EICC}. {A}s a result, the {B}o{B} circulation contributes to a net freshwater gain that amounts to 11% of the local rain and freshwater inputs.}, keywords = {{F}reshwater ; {B}ay of {B}engal ; {O}ceanic circulation ; {S}atellite altimetry ; {M}esoscale eddies ; {E}kman transport ; {L}agrangian approach ; {OCEAN} {INDIEN} ; {BENGALE} {GOLFE}}, booktitle = {}, journal = {{O}cean {D}ynamics}, volume = {71}, numero = {11-12}, pages = {1113--1139}, ISSN = {1616-7341}, year = {2021}, DOI = {10.1007/s10236-021-01486-5}, URL = {https://www.documentation.ird.fr/hor/fdi:010083142}, }