Spatiotemporal variability of dissolved inorganic macronutrients along the northern Antarctic Peninsula (1996–2019)

Abstract The northern Antarctic Peninsula is a key region of the Southern Ocean due to its complex ocean dynamics, distinct water mass sources, and climate‐driven changes taking place in region. Despite importance macronutrients supporting strong biological carbon uptake storage, little known about their spatiotemporal variability along Peninsula. Hence, we explored for first time 24‐year series (1996–2019) this understand processes involved spatial interannual macronutrients. We found high macronutrient concentrations, even surface waters during phytoplankton blooms. Minimum concentrations dissolved inorganic nitrogen (DIN; 16 μ mol kg −1 ), phosphate (0.7 silicic acid (40 ) are higher than those recorded surrounding regions. main source intrusions Circumpolar Deep Water modified variety, while local sources (organic matter remineralization, mixing, mesoscale structures) can enhance variability. However, identified depletion influence Dense Shelf from Weddell Sea. Macronutrient show substantial driven by balance between advection Water, which largely modulated Annular Mode (SAM) some extent El Niño‐Southern Oscillation (ENSO). These findings critical improving our understanding natural ecosystem how it responding climate changes.