Decadal changes in global oceanic primary productivity and key drivers

Abstract

Abstract Ocean phytoplankton form complex groups of interplayed living organisms in the marine food web, with profound control in marine biological and geochemical cycles, forming ecological structures and affecting climate regulatory systems. They have a significant impact on the marine biochemical and geochemical cycles, help to construct ecological structures, and influence the mechanisms that regulate the global climate. The world's oceanic regions are changing very rapidly there Physical processes and biogeochemistry. A significant portion of the global population relies on ocean resources for their daily livelihood. Since the biogeochemistry of the oceans is crucial for the marine food chain. It is imperative to monitor and detect the changes in oceans' Primary Productivity (PP). Rates and drivers of Primary Productivity (PP) have been well understood for many terrestrial diversified ecosystems but persist unsolved for many marine ecosystems, particularly those within open ocean environments. Here, we analyze the decadal changes in Net Primary Productivity (NPP) in the global ocean and their potential drivers. Ocean warming strengthens upper ocean seasonal or inter-seasonal thermal stratification, mesoscale circulation, water density, and nutrient uptake. These are the major factors playing central roles in regulating PP all over the ocean.