Complete Purdue Aircraft Dataset from Northern Alaska Measurements during spring 2022

CHemistry in the Arctic: Clouds, Halogens, and Aerosols (CHACHA) was a field campaign based out of Utqiaġvik, Alaska (AK) from February to April of 2022. The primary goals of CHACHA were to improve our understanding of the influence of open leads on atmospheric mixing, chemistry, and cloud formation; to improve our understanding of the spatial distribution (horizontally and vertically) of bromine chemistry – largely through bromine monoxide (BrO) measurements; and to improve our understanding of the influence of nitrogen oxides (NOx) on bromine chemistry using the large emissions downwind of oil and gas activity to probe this chemistry. As the Arctic continues to warm at several times the global average rate we expect anthropogenic activity (e.g., oil and gas expansion, shipping, tourism) to continue increasing, leading to larger emissions of NOx. During CHACHA we collected data using a surface measurement site, the University of Wyoming King Air aircraft, and the Purdue University Airborne Laboratory for Atmospheric Research (ALAR) aircraft. This dataset represents the data collected from ALAR. This dataset includes all final ALAR data for the campaign other than BrO and NO2 data measured using the Heidelberg Airborne Imaging DOAS Instrument (HAIDI), which has been saved separately.