@article{fdi:010064866, title = {{S}outhern {A}nnular {M}ode and westerly-wind-driven changes in {I}ndian-{A}tlantic exchange mechanisms}, author = {{L}oveday, {B}. {R}. and {P}enven, {P}ierrick and {R}eason, {C}. {J}. {C}.}, editor = {}, language = {{ENG}}, abstract = {{T}he dynamical link between the {I}ndian {O}cean and {A}tlantic {M}eridional {O}verturning {C}irculation ({AMOC}) remains poorly understood. {T}his partly arises from the complex {A}gulhas leakage, which occurs via rings, cyclones, and non-eddy flux. {H}indcast simulations suggest that leakage has recently increased but have not decomposed this signal into its constituent mechanisms. {H}ere these are isolated in a realistic ocean model. {I}ncreases in simulated leakage are attributed to stronger eddy and non-eddy-driven transports, and a strong warming and salinification, especially within {A}gulhas rings. {V}ariability in both regimes is associated with strengthening {I}ndian {O}cean westerly winds, reflecting an increasingly positive {S}outhern {A}nnular {M}ode. {W}hile eddy and non-eddy flux signals are tied through turbulent eddy dissipation, the ratio between the two varies decadally. {C}onsequently, while altimetry suggests a recent increase in retroflection turbulence and implied leakage, non-eddy flux may also play a significant role in modulating the leakage {AMOC} connection.}, keywords = {{A}gulhas leakage ; {S}outhern {A}nnular {M}ode ; interbasin exchange ; oceanography ; mesoscale variability ; {AFRIQUE} {DU} {SUD} ; {ATLANTIQUE} ; {OCEAN} {INDIEN} ; {AGULHAS} {COURANT} {MARIN}}, booktitle = {}, journal = {{G}eophysical {R}esearch {L}etters}, volume = {42}, numero = {12}, pages = {4912--4921}, ISSN = {0094-8276}, year = {2015}, DOI = {10.1002/2015gl064256}, URL = {https://www.documentation.ird.fr/hor/fdi:010064866}, }