@article{fdi:010080512, title = {{A} road map to {I}nd{OOS}-2 better observations of the rapidly warming {I}ndian {O}cean}, author = {{B}eal, {L}. {M}. and {V}ialard, {J}{\'e}r{\^o}me and {R}oxy, {M}. {K}. and {L}i, {J}. and {A}ndres, {M}. and {A}nnamalai, {H}. and {F}eng, {M}. and {H}an, {W}. and {H}ood, {R}. and {L}ee, {T}. and {L}engaigne, {M}atthieu and {L}umpkin, {R}. and {M}asumoto, {Y}. and {M}c{P}haden, {M}. {J}. and {R}avichandran, {M}. and {S}hinoda, {T}. and {S}loyan, {B}. {M}. and {S}trutton, {P}. {G}. and {S}ubramanian, {A}. {C}. and {T}ozuka, {T}. and {U}mmenhofer, {C}. {C}. and {U}nnikrishnan, {A}. {S}. and {W}iggert, {J}. and {Y}u, {L}. and {C}heng, {L}. and {D}esbruyeres, {D}. {G}. and {P}arvathi, {V}.}, editor = {}, language = {{ENG}}, abstract = {{T}he {I}ndian {O}cean {O}bserving {S}ystem ({I}nd{OOS}), established in 2006, is a multinational network of sustained oceanic measurements that underpin understanding and forecasting of weather and climate for the {I}ndian {O}cean region and beyond. {A}lmost one-third of humanity lives around the {I}ndian {O}cean, many in countries dependent on fisheries and rain-fed agriculture that are vulnerable to climate variability and extremes. {T}he {I}ndian {O}cean alone has absorbed a quarter of the global oceanic heat uptake over the last two decades and the fate of this heat and its impact on future change is unknown. {C}limate models project accelerating sea level rise, more frequent extremes in monsoon rainfall, and decreasing oceanic productivity. {I}n view of these new scientific challenges, a 3-yr international review of the {I}nd{OOS} by more than 60 scientific experts now highlights the need for an enhanced observing network that can better meet societal challenges, and provide more reliable forecasts. {H}ere we present core findings from this review, including the need for 1) chemical, biological, and ecosystem measurements alongside physical parameters; 2) expansion into the western tropics to improve understanding of the monsoon circulation; 3) better-resolved upper ocean processes to improve understanding of air-sea coupling and yield better subseasonal to seasonal predictions; and 4) expansion into key coastal regions and the deep ocean to better constrain the basinwide energy budget. {T}hese goals will require new agreements and partnerships with and among {I}ndian {O}cean rim countries, creating opportunities for them to enhance their monitoring and forecasting capacity as part of {I}nd{OOS}-2.}, keywords = {{OCEAN} {INDIEN}}, booktitle = {}, journal = {{B}ulletin of the {A}merican {M}eteorological {S}ociety}, volume = {101}, numero = {11}, pages = {{E}1891--{E}1913}, ISSN = {0003-0007}, year = {2020}, DOI = {10.1175/bams-d-19-0209.1}, URL = {https://www.documentation.ird.fr/hor/fdi:010080512}, }