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Recent Trends in Satellite-Derived Chlorophyll and Aerosol Optical Depth Together with Simulated dimethylsulfide in the Eastern China Marginal seas

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Journal of Ocean University of China 2022年第2期21卷 486-498页

作者： QU Bo GABRIC Albert J. School of Science Nantong UniversityNantong 266000China School of Environment and Science Griffith UniversityBrisbaneQLDAustralia

The biogenic compound dimethylsulfide(DMS)produced by a range of marine biota is the major natural source of re-duced sulfur to the atmosphere and plays a major role in the formation and evolution of aerosols,potentially affecting *** spatio-temporal distribution of satellite-derived chlorophyll_a(CHL)and aerosol optical depth(AOD)for the recent years(2011-2019)in the Eastern China Marginal seas(ECMS)(25°-40°N,120°-130°E)are *** seasonal CHL peaks occurred during late April and the CHL distribution displays a clear zonal *** CHL was also observed along the northern and western coastlines during summer and winter *** analysis shows that mean CHL decreases by about 10%over the 9-year study period,while AOD was higher in south and lower in north during summertime.A genetic algorithm technique is used to calibrate the key model parameters and simulations are carried out for 2015,a year when field data was *** simulation results show that DMS seawater concentration ranges from 1.56 to 5.88 nmol L^(−1) with a mean value of 2.76 nmol L^(−1).DMS sea-air flux ranges from 2.66 to 5.00mmol m^(−2) d^(−1) with mean of 3.80mmol m^(−2) d^(−1).Positive correlations of about 0.5 between CHL and AOD were found in the study region,with higher correlations along the coasts of Jiangsu and Zhejiang *** elevated CHL concentration along the west coast is correlated with increased sea-water concentrations of DMS in the *** results suggest a possible influ-ence of DMS-derived aerosol in the local ECMS atmosphere,especially along the western coastline of ECMS.

关键词： dimethylsulfide sea-to-air flux chlorophyll-a aerosol optical depth biogeochemical model Eastern China Marginal seas

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