Long-Term Trends of Air Pollution at National Atmospheric Observatory Košetice (ACTRIS, EMEP, GAW)
| Autor: | Pavel Machálek, Adéla Holubová Smejkalová, Jaroslava Svobodová, Milan Váňa |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Pollution
Total organic carbon Atmospheric Science media_common.quotation_subject long-term trends Air pollution Environmental Science (miscellaneous) lcsh:QC851-999 Atmospheric sciences medicine.disease_cause air quality Air quality monitoring Trend analysis Observatory background scale medicine Environmental science Hydrometeorology lcsh:Meteorology. Climatology Air quality index media_common Czech Republic |
| Zdroj: | Atmosphere Volume 11 Issue 5 Atmosphere, Vol 11, Iss 537, p 537 (2020) |
| ISSN: | 2073-4433 |
| DOI: | 10.3390/atmos11050537 |
| Popis: | The National Atmospheric Observatory Ko&scaron etice operated by the Czech Hydrometeorological Institute was established in 1988 as a station specializing in air quality monitoring at the background scale. The observatory is located in the free area outside of the settlement and represents the Czech Republic in various international projects. The objective of the present study is to detect the long-term trends of air quality at the background scale of the Czech Republic. The statistical method used for trend analysis is based on the nonparametric Mann&ndash Kendall test. Generally, the results show that the fundamental drop in emission of basic air pollutants was reflected in the significant decrease in pollution levels. A most significant drop was detected for sulphur. No trend was found for NO2 in 1990&ndash 2012, but a visibly decreasing tendency was registered in the last 7 years. A slightly decreasing trend was registered for O3 in the whole period, but a slightly increasing tendency was found after 2006. More importantly, the number of episodes exceeding the target value for human health dropped significantly. The reduction of volatile organic compounds (VOCs) emissions was reflected in a statistically significant decrease of concentrations. Only isoprene, which is of natural origin, displays an inverse trend. Concentrations of elemental carbon (EC) and organic carbon (OC) dropped since 2010, but only for EC is the trend statistically significant. |
| Databáze: | OpenAIRE |
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