@article{fdi:010088067, title = {{H}ow does the {N}iger river warm coastal waters in the northern {G}ulf of {G}uinea ?}, author = {{T}ope, {G}. {D}. {A}. and {A}lory, {G}. and {D}jakoure, {S}. and {D}a-{A}llada, {C}. {Y}. and {J}ouanno, {J}ulien and {M}orvan, {G}uillaume}, editor = {}, language = {{ENG}}, abstract = {{T}o highlight the processes by which the {N}iger {R}iver warms the coastal waters in the eastern part of the northern {G}ulf of {G}uinea upwelling, two simulations of the {NEMO} model at high resolution were used over the period 2010 - 2017. {T}he first simulation is realistic while the second is a simulation in which the effects of the {N}iger {R}iver are not taken into account. {T}he first step was to evaluate the outputs of the models, using satellite products and in situ observations. {T}he average states of the {S}ea {S}urface {T}emperature, {S}alinity, {H}eight, zonal current and vertical profiles of temperature and salinity showed the ability of the model to reproduce correctly the physical characteristics of the study area. {T}he analysis of the heat balance terms of the two simulations showed that vertical diffusion and meridional advection processes are the causes of the warming induced by the {N}iger {R}iver. {T}he stratification and vertical shear of the horizontal currents reveal that the river acts by inhibiting the upwelling of cold water induced by vertical diffusion. {T}he river reinforces the stratification and prevents vertical shearing of horizontal currents at the bottom of the mixed layer.}, keywords = {coastal upwelling ; {N}iger river plume ; {G}ulf of {G}uinea ; heat balance ; tropical {A}tlantic ; {ATLANTIQUE} ; {ZONE} {TROPICALE} ; {GOLFE} {DE} {GUINEE}}, booktitle = {}, journal = {{F}rontiers in {M}arine {S}cience}, volume = {10}, numero = {}, pages = {1187202 [11 p.]}, year = {2023}, DOI = {10.3389/fmars.2023.1187202}, URL = {https://www.documentation.ird.fr/hor/fdi:010088067}, }