RESPONSES OF MARINE PRIMARY PRODUCTION CAUSED BY DEPOSITION OF TYPICAL NATURAL AEROSOLS
Atmospheric deposition is an important route for terrigenous materials to input nutrients into the ocean.Dust,wildfire,and volcanic eruption can all discharge aerosols into the atmosphere.These typical terrigenous aerosols can travel a long distance with wind,provide some limiting nutrients to the upper ocean via deposition,improve the growth of marine phytoplankton,increase the primary productive capacity of the ocean,and consequently promote the carbon cycle process.The responses of sea surface chlorophyll concentration,an important index of ocean primary productivity to three typical terrestrial aerosols of dust,wildfire,and volcanic eruption were analyzed.Results show that the response of marine primary production to aerosol deposition is not only related to the type of aerosol,but also related to the temperature,hydrodynamic conditions,photosynthetically active radiation,and other limiting factors of marine primary production,demonstrating the sensitivity of marine primary production to terrigenous aerosols.Therefore,marine primary production driven by terrigenous aerosol deposition has an important potential impact on the global carbon cycle.
natural aerosoltransportation and depositionnutrientssea surface chlorophyll concentrationmarine primary production
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