Nitryl chloride is an active chlorine compound formed during the nighttime reaction of N2O5 with chloride ion on particle and perhaps ground surfaces. The subsequent photolysis of ClNO2 can be a significant contributor to radical production during the early morning. We measured ClNO2 in northeast Utah during the past three Uintah Basin Winter Ozone Studies (UBWOS) in 2012-2014. These studies took place in January and February of those years under conditions that ranged from dry and un-seasonably warm (2012), to cold with snow cover (2013) and in between (2014). The measured ClNO2 levels rivaled those found in coastal areas, due mostly to the availability of chloride from soil and crustal material, and relatively high levels of ozone and NOx present in this basin. The challenges of measuring ClNO2 in this environment will be discussed, and the relative importance of ClNO2 as a radical source will be assessed. In addition, evidence for the uptake or production of ClNO2 at the ground will be presented.

Nitryl chloride (ClNO<sub>2</sub>) and its chemistry during the Uintah Basin Winter Ozone Studies

248th National Meeting (2014)

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Nitryl chloride (ClNO2) and its chemistry during the Uintah Basin Winter Ozone Studies

Nitryl chloride (ClNO₂) and its chemistry during the Uintah Basin Winter Ozone Studies