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Data Supporting "Process Controls on Dimethyl Sulfide Accumulation and Its Response to Microplastic Perturbation in the Pearl River Estuary–Western South China Sea"
Original title: Data Supporting “Process Controls on Dimethyl Sulfide Accumulation and Its Response to Microplastic Perturbation in the Pearl River Estuary–Western South China Sea”
Summary
Scientists studied how a gas called DMS—produced by ocean microbes and linked to cloud formation—is created and broken down in coastal waters near southern China, and tested whether floating microplastic pollution changes this process. This matters because DMS plays a role in climate regulation, and the findings suggest that microplastic pollution in our oceans could be quietly disrupting natural systems that help keep our planet's weather and climate stable.
This dataset supports the study entitled “Process Controls on Dimethyl Sulfide Accumulation and Its Response to Microplastic Perturbation in the Pearl River Estuary–Western South China Sea.” The study integrates field observations, process-rate measurements, sea-to-air flux calculations, photochemical experiments, and shipboard microplastic incubations to investigate the processes regulating dimethyl sulfide (DMS) accumulation in estuarine–coastal waters.The dataset contains five worksheets:Surface_data: Surface hydrographic and biogeochemical observations collected in the Pearl River Estuary and the western South China Sea during July–August 2021, including wind speed, temperature, salinity, chlorophyll-a (Chl-a), DMS, DMSP, dissolved DMSP (DMSPd), and particulate DMSP (DMSPp).Process_rates: Station-specific biological DMS production rates, microbial DMS consumption rates, net DMS production rates, DMSPd degradation rates, and DMSPd-to-DMS conversion efficiencies.Sea_air_flux: Surface-water DMS concentrations, wind speeds, and calculated sea-to-air DMS fluxes at individual sampling stations.Photochemistry: DMS photochemical oxidation rates under visible light, UVA, UVB, and full-spectrum solar radiation, together with the corresponding solar irradiance.Microplastic_data: Time-series data from shipboard microplastic incubation experiments, including Chl-a, dissolved organic carbon (DOC), DMS, DMSPd, and DMSPp in the microplastic-amended treatments and their corresponding controls.The data are provided in a machine-readable Microsoft Excel file and include the numerical values used in the analyses, figures, and tables presented in the manuscript and Supporting Information. Blank cells indicate measurements that were unavailable or not determined. The dataset may be used to examine DMS and DMSP distributions, transformation efficiencies, biological and photochemical turnover, sea-to-air exchange, and the responses of the DMSP–DMS system to controlled microplastic perturbation.