Tropical Indo‐Pacific Ocean chlorophyll response to MJO forcing

摘要: [1] Previous studies that analyzed ocean color satellite data have suggested the primary mechanism of surface chlorophyll (Chl) response to MJO is wind-induced turbulent mixing and corresponding mixed layer entrainment. In this study, notion examined with an biophysical model in ensemble framework, focusing on upper processes (z < 200 m). As a whole, model's mean Chl state lower than observations except tropical Pacific basin, but its seasonal variation acceptable, particularly Indian Ocean. can simulate responses consistent terms phase-by-phase anomaly evolution patterns. These are mostly induced by wind forcing, which previous studies. Further investigation subsurface variations performed at select grid points, it revealed (1) entrained nutrients source enhancement for concentration detrainment blooms relatively less common; (2) limited regions, Ekman pumping effectively reduce concentration; (3) both entrainment/detrainment mechanisms rely background states nutrient availability, so same forcing result completely different depending state.