Understanding the influence of Rossby waves on surface chlorophyll concentrations in the North Atlantic Ocean

摘要: The variability (in space and time) of westward propagating Rossby waves is analyzed with a wavelet method between 10N 40N in the North Atlantic Ocean using two remotely sensed data sets (Sea Level Anomalies – SLA surface chlorophyll-a concentrations) order to better understand waves' characteristics their impacts on chlorophyll distribution. Signals wavelengths ? 500 km 1000 4- 24-month periods were detected identified as first baroclinic mode waves. spatial temporal information has also highlighted particular situation 1998 at 34N, simultaneous existence distinct wave components corresponding km. Signatures ocean color prompt question how influence concentrations. Several physical/biological processes have been suggested: eddy pumping mechanism associated nutrient injection, uplifting deep maximum toward surface, meridional advection horizontal gradients by geostrophic currents A statistical decomposition observed signal into different modeled Killworth et al. (2004) confirms main contribution north-south south 28N. In this part basin, more than 70% explained process. 28N, signatures seem be due well vertical injection (? 50% amplitude). This may an impact primary production basin.