By the same authors

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From the same journal

Isotopic evidence for acidity-driven enhancement of sulfate formation after SO2 emission control

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  • Shohei Hattori
  • Yoshinori Iizuka
  • Becky Alexander
  • Sakiko Ishino
  • Koji Fujita
  • Shuting Zhai
  • Tomás Sherwen
  • Naga Oshima
  • Ryu Uemura
  • Akinori Yamada
  • Nozomi Suzuki
  • Sumito Matoba
  • Asuka Tsuruta
  • Joel Savarino
  • Naohiro Yoshida


Publication details

JournalScience Advances
DateAccepted/In press - 21 Mar 2021
DatePublished (current) - 5 May 2021
Issue number19
Original languageEnglish


After the 1980s, atmospheric sulfate reduction is slower than the dramatic reductions in sulfur dioxide (SO2) emissions. However, a lack of observational evidence has hindered the identification of causal feedback mechanisms. Here, we report an increase in the oxygen isotopic composition of sulfate (Δ17OSO42-) in a Greenland ice core, implying an enhanced role of acidity-dependent in-cloud oxidation by ozone (up to 17 to 27 in sulfate production since the 1960s. A global chemical transport model reproduces the magnitude of the increase in observed Δ17OSO42- with a 10 to 15 to sulfate in Eastern North America and Western Europe. With an expected continued decrease in atmospheric acidity, this feedback will continue in the future and partially hinder air quality improvements.

Bibliographical note

© 2021, The Author(s).

    Research areas

  • sulfur, isotopes, sulfate, PM2.5, airquality, Air Pollution, icecore, acidity, emissions

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