Decadal Changes in Global Oceanic Primary Productivity and Its Drivers  

作　　者：Subhadeep Maishal 

机构地区：[1]CORAL,Indian Institute of Technology Kharagpur,Kharagpur 721302,India

出　　处：《Ocean-Land-Atmosphere Research》2024年第1期117-131,共15页海洋-陆地-大气研究(英文)

摘　　要：This study investigates the decade-long changes in net primary productivity(NPP)across global oceans and their underlying drivers.The reanalysis data indicate a substantial decline in NPP in the equatorial Indian Ocean(IO),Atlantic Ocean(AO),and Pacific Ocean(PO),averaging-25 to-50 mgC/day/m^(3)/dec between 1998 and 2008.However,subsequent shifts occurred,with the AO and IO showing positive trends of similar magnitude,while the equatorial PO experienced more pronounced negative trends from 2009 to 2018.These PO trends are linked to a warming of approximately 0.1 to 0.2℃/dec.Surface density exhibited a decline of-0.023 kg/m^(3)/dec,surface salinity ranged from-0.025 to-0.050 per dec,wind stress decreased at a rate of-0.02 Pa/dec,and mixed layer depth was reduced by-10 to-20 m/dec during the same period.Additionally,the substantial decrease in nitrate(-0.2 mmol/m^(3)/dec)and phosphate(-0.2 mmol/m^(3)/dec)concentrations contributed to the notable decline in NPP observed in the PO region.

关 键 词：EQUATORIAL SALINITY WARMING 

分 类 号：P73[天文地球—海洋科学]