The results of air pollution assessment during a 2017 cruise of the research ship "MinervaUno" in the Tyrrhenian Sea are reported. Volatile Organic Compounds (VOCs), Oxygenated VolatileOrganic Compounds (OVOCs), and pollutants such as nitrogen oxides, ozone, and sulphur dioxidewere monitored throughout the cruise. The shallow waters at ten sites of the investigated areawere also analyzed. Organic compounds such as n-alkanes showed a bimodal distribution with amaximum at C5-C6 and C10-C11 at sites the most affected by anthropic impact, whereas remotesites showed a unimodal distribution with maximum at C10-C11. The most abundant atmosphericOVOC was acetone (3.66 µg/m3), accounting for 38%; formaldehyde (1.23 µg/m3) and acetaldehyde(0.99 µg/m3) made up about 22-29% of the total. The influence of some natural sources as volcanoes,in the southern part of the Tyrrhenian Sea near the Aeolian arc was studied. This source did notinduce any noticeable effect on the total amount of hydrocarbons nor on the levels of trace gasessuch as CFCs, whereas the trends of sulphur dioxide seemed to confirm a possible contribution. Theimpact of underwater emissions was observed near the Panarea and Vulcano islands, where lowerpHs, high levels of Fe and Mn, and diagnostic of vent activity, were measured.
Air Quality Assessment in the Central Mediterranean Sea (Tyrrhenian Sea): Anthropic Impact and Miscellaneous Natural Sources, including Volcanic Contribution, on the Budget of Volatile Organic Compounds (VOCs)
Vichi, F.
;Ianniello, A.;Frattoni, M.;Imperiali, A.;Esposito, G.;Tomasi Scianò, M. C.;Perilli, M.;Cecinato, A.
2021
Abstract
The results of air pollution assessment during a 2017 cruise of the research ship "MinervaUno" in the Tyrrhenian Sea are reported. Volatile Organic Compounds (VOCs), Oxygenated VolatileOrganic Compounds (OVOCs), and pollutants such as nitrogen oxides, ozone, and sulphur dioxidewere monitored throughout the cruise. The shallow waters at ten sites of the investigated areawere also analyzed. Organic compounds such as n-alkanes showed a bimodal distribution with amaximum at C5-C6 and C10-C11 at sites the most affected by anthropic impact, whereas remotesites showed a unimodal distribution with maximum at C10-C11. The most abundant atmosphericOVOC was acetone (3.66 µg/m3), accounting for 38%; formaldehyde (1.23 µg/m3) and acetaldehyde(0.99 µg/m3) made up about 22-29% of the total. The influence of some natural sources as volcanoes,in the southern part of the Tyrrhenian Sea near the Aeolian arc was studied. This source did notinduce any noticeable effect on the total amount of hydrocarbons nor on the levels of trace gasessuch as CFCs, whereas the trends of sulphur dioxide seemed to confirm a possible contribution. Theimpact of underwater emissions was observed near the Panarea and Vulcano islands, where lowerpHs, high levels of Fe and Mn, and diagnostic of vent activity, were measured.File | Dimensione | Formato | |
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