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

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 journal › Article

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 language	English (US)
Pages (from-to)	454-462
Number of pages	9
Journal	Tellus, Series B
Volume	42 B
Issue number	5
State	Published - Jan 1 1990
Externally published	Yes

All Science Journal Classification (ASJC) codes

Atmospheric Science

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Hedin, L. O., Granat, L., Likens, G. E., & Rodhe, H. (1990). Strong similarities in seasonal concentration ratios of SO₄ ^2-, NO₃ ^- and NH₄ ⁺ in precipitation between Sweden and the northeastern US. Tellus, Series B, 42 B(5), 454-462.

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

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",

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year = "1990",

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pages = "454--462",

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}

In: Tellus, Series B, Vol. 42 B, No. 5, 01.01.1990, p. 454-462.

Research output: Contribution to journal › Article

TY - JOUR

T1 - Strong similarities in seasonal concentration ratios of SO4 2-, NO3 - and NH4 + in precipitation between Sweden and the northeastern US

AU - Hedin, Lars O.

AU - Granat, L.

AU - Likens, G. E.

AU - Rodhe, H.

PY - 1990/1/1

Y1 - 1990/1/1

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AB - 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

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