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August 17, 2025Open Access

An intercomparison of aircraft sulfur dioxide measurements in clean and polluted marine environments

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An observational analysis of sulfur dioxide levels in clean and polluted marine environments, revealing key instrumentation differences.

LIF effectively measures low sulfur dioxide concentrations in remote marine environments, outperforming other instruments.
The laser-induced fluorescence method demonstrated a detection limit of 0.07 ppb at 10 seconds, much lower than the pulsed fluorescence's 0.4 ppb.
In polluted air masses, the I-CIMS instrument showed good correlation with LIF and PF, although it faced significant interference challenges.
Faster response times were noted for LIF and I-CIMS, compared to pulsed fluorescence, crucial for monitoring emissions in dynamic marine conditions.

Temple et al. (2025) studied this question.

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