What question did this study set out to answer?

This research aims to understand the effects of relative humidity on sulfate production in winter haze events.

Relative Humidity Constrains the Saturated Oxidation Capacity of Sulfate Formation

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Demonstrates how relative humidity regulates sulfate formation in atmospheric aerosols, suggesting implications for haze control.

This research aims to understand the effects of relative humidity on sulfate production in winter haze events.
Developed a mechanistic constraint model for sulfate formation.
Conducted long-term observations in Beijing from 2013 to 2018.
Performed sensitivity analyses on pH–RH regimes in weakly acidic aerosol systems.
Identified a relative-humidity-regulated saturation limit for sulfate production.
Found that high RH conditions suppress effective oxidation rates despite increased SO2 dissolution.
Demonstrated that sulfate accumulation stabilizes at high RH during winter haze events.

Zong et al. (2026) studied this question.

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