Strong similarities in seasonal concentration ratios of SO4 2-, NO3 - and NH4 + in precipitation between Sweden and the northeastern US

Lars O. Hedin, L. Granat, G. E. Likens, H. Rodhe

Research output: Contribution to journalArticle

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Abstract

We analyzed 21-year long records of precipitation chemistry from central Scandinavia and the northeastern US to compare seasonal variations of three major pollutant ions, SO4 2-, NO3 - and NH4 +. Seasonal variations in concentrations of the individual ions were distinctly different between the two regions. However, despite these differences, we found strong and unexpected similarities between the two regions in seasonal variations of the concentration ratios NO3 -/SO4 2-, NH4 +/NO3 - and NH4 +/SO4 2-. A preliminary analysis suggests that these similarities are due to similarities between the two regions in chemical transformation and removal processes affecting SO4 2- and NO3 - in the atmosphere, and to a coupling between NH4 + and SO4 2- aerosol in long-range transport. -from Authors

Original languageEnglish (US)
Pages (from-to)454-462
Number of pages9
JournalTellus, Series B
Volume42 B
Issue number5
StatePublished - Jan 1 1990
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Atmospheric Science

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