Modulation of tropical ocean surface chlorophyll by the Madden–Julian Oscillation

摘要: The MJO modulation of sea surface chlorophyll-a (Chl) examined initially by Waliser et al. in Geophys Res Lett, (2005) is revisited with a significantly longer time-series observations and more systematic approach to characterizing the possible mechanisms underlying MJO-Chl relationships. composite analysis Chl lead-lag correlations between other physical variables reveal regional variability corresponding indicative temporal relationships among variables. Along path convection, wind speed—a proxy for oceanic vertical turbulent mixing entrainment—is most strongly correlated when leads few days. Composite also displays influences away from convection. role speed those regions generally same as that along although Ekman pumping plays generating limited regions. However, forcing convection less coherent, rendering link relatively weak. Lastly, potential bio-physical feedbacks at time-scale examined. correlation provides tantalizing evidence local bio-feedbacks system. Plausible hypothesis amplify phase transition presented though it cannot be affirmed this study will reported future modeling study.