English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

This study analyzed long-term air concentrations and annual wetdeposition of inorganic ions and aerosol and precipitation acidity at 31 Canadian sites from 1983 to 2011. Scavenging ratios of inorganic ions andrelative contributions of particulate- and gas-phase species toNH4+, NO3−, and SO42− wet deposition weredetermined. Geographical patterns of atmospheric Ca2+, Na+,Cl−, NH4+, NO3−, and SO42− were similarto wet deposition and attributed to anthropogenic sources, sea-saltemissions, and agricultural emissions. Decreasing trends in atmosphericNH4+ (1994–2010) and SO42− (1983–2010) were prevalent.Atmospheric NO3− increased prior to 2001 and then declinedafterwards. These results are consistent with SO2, NOx andNH3 emission trends in Canada and the USA. Widespread declines inannual NO3− and SO42− wet deposition ranged from0.07 to 1.0 kg ha−1 a−1 (1984–2011). Acidic aerosols andprecipitation impacted southern and eastern Canada more than western Canada;however, both trends have been decreasing since 1994. Scavenging ratios ofparticulate NH4+, SO42− and NO3− differedfrom literature values by 22 %, 44 %, and a factor of 6, respectively,because of the exclusion of gas scavenging in previous studies. Average gasand particle scavenging contributions to total wet deposition were estimatedto be 72 % for HNO3 and 28 % for particulate NO3−,37 % for SO2 and 63 % for particulate SO42−, and 30 %for NH3 and 70 % for particulate NH4+

atmospheric chemistry and physics

Long-term air concentrations, wet deposition, and scavenging ratios of inorganic ions, HNO&amp;lt;sub&amp;gt;3&amp;lt;/sub&amp;gt;, and SO&amp;lt;sub&amp;gt;2&amp;lt;/sub&amp;gt; and assessment of aerosol and precipitation acidity at Canadian rural locations