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Nitrogen compounds at Mexican and USA coasts on the Gulf of Mexico
https://orcid.org/0000-0003-4091-1194
https://orcid.org/0000-0003-2536-7266
https://orcid.org/0000-0001-7814-7887
https://orcid.org/0000-0002-9748-4157
Abstract In recent decades, anthropogenic emissions in the Gulf of Mexico have caused a deterioration in air quality in surrounding areas, mainly due to particulate matter, sulfur dioxide and nitrogen dioxide. Over this period, interest in reactive nitrogen compounds has increased due to their relationships to air quality and ecosystem impacts associated with atmospheric deposition. In this study we summarize air concentrations of nitrogen dioxide in ambient air and wet atmospheric deposition of nitrate and ammonium along the southern coast of the United States of America and eastern Mexico over the period 2017 to 2020. The highest concentrations of ammonium and nitrate were observed in precipitation at Texas and sites in Mexico, although the highest rates of atmospheric deposition were observed in Florida and Louisiana. The ratio between ammonium and nitrate in precipitation was higher at Mexican stations than in studied sites in the United States, influenced by meteorological factors, atmospheric emissions, and characteristic air mass transport in the region. Back trajectory modeling showed the importance of the seasonality of the wind in the transport of nitrogen compounds of local and regional origin that affect Veracruz.
Graphical abstract Display Omitted
Highlights In the Gulf of Mexico, anthropogenic emissions have deteriorated air quality. NO2 peaks in the cold months and during peak traffic times. In rural areas, predominates, indicating its relationship with agriculture. Seasonal meteorological conditions influence the origin of nitrogen compounds in Veracruz.
Nitrogen compounds at Mexican and USA coasts on the Gulf of Mexico
https://orcid.org/0000-0003-4091-1194
https://orcid.org/0000-0003-2536-7266
https://orcid.org/0000-0001-7814-7887
https://orcid.org/0000-0002-9748-4157
Abstract In recent decades, anthropogenic emissions in the Gulf of Mexico have caused a deterioration in air quality in surrounding areas, mainly due to particulate matter, sulfur dioxide and nitrogen dioxide. Over this period, interest in reactive nitrogen compounds has increased due to their relationships to air quality and ecosystem impacts associated with atmospheric deposition. In this study we summarize air concentrations of nitrogen dioxide in ambient air and wet atmospheric deposition of nitrate and ammonium along the southern coast of the United States of America and eastern Mexico over the period 2017 to 2020. The highest concentrations of ammonium and nitrate were observed in precipitation at Texas and sites in Mexico, although the highest rates of atmospheric deposition were observed in Florida and Louisiana. The ratio between ammonium and nitrate in precipitation was higher at Mexican stations than in studied sites in the United States, influenced by meteorological factors, atmospheric emissions, and characteristic air mass transport in the region. Back trajectory modeling showed the importance of the seasonality of the wind in the transport of nitrogen compounds of local and regional origin that affect Veracruz.
Graphical abstract Display Omitted
Highlights In the Gulf of Mexico, anthropogenic emissions have deteriorated air quality. NO2 peaks in the cold months and during peak traffic times. In rural areas, predominates, indicating its relationship with agriculture. Seasonal meteorological conditions influence the origin of nitrogen compounds in Veracruz.
Nitrogen compounds at Mexican and USA coasts on the Gulf of Mexico
https://orcid.org/0000-0003-4091-1194
https://orcid.org/0000-0003-2536-7266
https://orcid.org/0000-0001-7814-7887
https://orcid.org/0000-0002-9748-4157
Abstract In recent decades, anthropogenic emissions in the Gulf of Mexico have caused a deterioration in air quality in surrounding areas, mainly due to particulate matter, sulfur dioxide and nitrogen dioxide. Over this period, interest in reactive nitrogen compounds has increased due to their relationships to air quality and ecosystem impacts associated with atmospheric deposition. In this study we summarize air concentrations of nitrogen dioxide in ambient air and wet atmospheric deposition of nitrate and ammonium along the southern coast of the United States of America and eastern Mexico over the period 2017 to 2020. The highest concentrations of ammonium and nitrate were observed in precipitation at Texas and sites in Mexico, although the highest rates of atmospheric deposition were observed in Florida and Louisiana. The ratio between ammonium and nitrate in precipitation was higher at Mexican stations than in studied sites in the United States, influenced by meteorological factors, atmospheric emissions, and characteristic air mass transport in the region. Back trajectory modeling showed the importance of the seasonality of the wind in the transport of nitrogen compounds of local and regional origin that affect Veracruz.
Graphical abstract Display Omitted
Highlights In the Gulf of Mexico, anthropogenic emissions have deteriorated air quality. NO2 peaks in the cold months and during peak traffic times. In rural areas, predominates, indicating its relationship with agriculture. Seasonal meteorological conditions influence the origin of nitrogen compounds in Veracruz.
Nitrogen compounds at Mexican and USA coasts on the Gulf of Mexico
Avila Rodríguez, Daimy (author) / Sosa Echeverría, Rodolfo (author) / Fuentes García, Gilberto (author) / Alarcón Jiménez, Ana Luisa (author) / Fernández Villagómez, Georgina (author) / Magaña, Víctor (author) / Walker, John (author) / Sánchez Álvarez, Pablo (author)
Atmospheric Environment ; 325
2024-03-02
Article (Journal)
Electronic Resource
English
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