@article{fdi:010081439, title = {{I}mpact of the subtropical mode water biogeochemical properties on primary production in the {N}orth {A}tlantic : new insights from an idealized model study}, author = {{K}remeur, {A}. {S}. and {L}evy, {M}. and {A}umont, {O}livier and {R}everdin, {G}.}, editor = {}, language = {{ENG}}, abstract = {{A}n idealized biophysical model of the {N}orth {A}tlantic was designed to investigate the setting and variability of the subtropical mode water ({STMW}) biogeochemical properties and its impact on surface primary production in the {N}orth {A}tlantic. {T}he model solution first emphasizes that the exact timing of {STMW} formation versus the timing of the spring bloom is of primary importance for setting the {STMW} biogeochemical properties. {T}he surface primary production reaches its maximum in {M}arch in the {STMW} formation region just before its subduction. {T}hus the spring bloom consumes nitrate at the surface before {STMW} subducts, and {STMW} leaves the upper layers depleted in nutrients and fueled in organic matter. {T}his spring consumption explains the low nutrient content of {STMW} observed near its source region by {J}.{B}. {P}alter et al. (2005). {F}urthermore, the model suggests that {STMW} plays a key role in exporting dissolved organic matter ({DOM}) at subsurface. {T}he spring bloom produces a significant amount of {DOM} sequestrated in the mode waters after its subduction. {T}his large pool of {DOM} is then remineralized with time along the transit of {STMW} through the subtropical gyre. {C}onsequently, the nutrient content of {STMW} increases as it moves away from its source region. {F}inally, the model shows also that {STMW} is very important in controlling primary production in the western boundary current ({WBC}) region. {I}ndeed, {STMW} remains isolated from the surface along its trajectory within the subtropical gyre. {I}t joins the mixed layer by obduction in the {WBC} region only. {T}his nutrient-rich old {STMW} irrigates and fertilizes the euphotic zone primarily in the {WBC} and then spreads along the boundary between the two gyres by advection.}, keywords = {{ATLANTIQUE}}, booktitle = {}, journal = {{J}ournal of {G}eophysical {R}esearch - {O}ceans}, volume = {114}, numero = {}, pages = {{C}07019}, ISSN = {0148-0227}, year = {2009}, DOI = {10.1029/2008jc005161}, URL = {https://www.documentation.ird.fr/hor/fdi:010081439}, }