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Possible heterogeneous chemistry of hydroxymethanesulfonate (HMS) in northern China winter haze

by Jayne, John T. , Zhu, Lei , Li, Mei , Zhou, Zhen , Xu, Xiaobin , Munger, J. William , Lv, Yibing , Gao, Meng , Zhang, Yuzhong , Wang, Ying , Jacob, Daniel J. , Sun, Yele , McElroy, Michael B. , Worsnop, Douglas R. , Lin, Nan , Cheng, Chunlei , Xu, Weiqi , Peng, Wei , Wang, Yuxuan , Song, Shaojie , Wang, Shuxiao

in Aerosol content / Aerosol formation / Aerosols / Air quality / Air quality models / Analysis / Atmospheric haze / Environmental aspects / Formaldehyde / Haze / Hydroxymethanesulfonate / Low temperature / Mass spectrometry / Mass spectroscopy / Moisture content / Organic chemistry / Properties / Secondary aerosols / Spectroscopy / Sulfates / Sulfur dioxide / Water content / Winter

2019

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Possible heterogeneous chemistry of hydroxymethanesulfonate (HMS) in northern China winter haze

2019

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Possible heterogeneous chemistry of hydroxymethanesulfonate (HMS) in northern China winter haze

2019

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Journal Article

Possible heterogeneous chemistry of hydroxymethanesulfonate (HMS) in northern China winter haze

Jayne, John T.,

Zhu, Lei,

Li, Mei,

Zhou, Zhen,

Xu, Xiaobin,

Munger, J. William,

Lv, Yibing,

Gao, Meng,

Zhang, Yuzhong,

Wang, Ying,

Jacob, Daniel J.,

Sun, Yele,

McElroy, Michael B.,

Worsnop, Douglas R.,

Lin, Nan,

Cheng, Chunlei,

Xu, Weiqi,

Peng, Wei,

Wang, Yuxuan,

Song, Shaojie,

Wang, Shuxiao

2019

Overview

The chemical mechanisms responsible for rapid sulfate production, an important driver of winter haze formation in northern China, remain unclear. Here, we propose a potentially important heterogeneous hydroxymethanesulfonate (HMS) chemical mechanism. Through analyzing field measurements with aerosol mass spectrometry, we show evidence for a possible significant existence in haze aerosols of organosulfur primarily as HMS, misidentified as sulfate in previous observations. We estimate that HMS can account for up to about one-third of the sulfate concentrations unexplained by current air quality models. Heterogeneous production of HMS by SO2 and formaldehyde is favored under northern China winter haze conditions due to high aerosol water content, moderately acidic pH values, high gaseous precursor levels, and low temperature. These analyses identify an unappreciated importance of formaldehyde in secondary aerosol formation and call for more research on sources and on the chemistry of formaldehyde in northern China winter.

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Copernicus GmbH,Copernicus Publications

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