Citation:

Long, R. AND L. Valin. Impacts of lake breeze meteorology on ozone gradient observations along Lake Michigan shorelines in Wisconsin. ATMOSPHERIC ENVIRONMENT. Elsevier Science Ltd, New York, NY, 269:0, (2022). https://doi.org/10.1016/j.atmosenv.2021.118834

Impact/Purpose:

This investigation seeks to identify the localized gradients in ozone with respect to inland penetration of the lake breeze using many years of ground-based measurements. We further investigate the ozone distribution and coincident meteorology on selected days using higher resolution measurements taken during LMOS 2017.

Description:

Daytime onshore lake breezes are a critical factor controlling ozone abundance at coastal sites around Lake Michigan. Coastal counties along the western shore of Lake Michigan have historically observed high ozone episodes dating to the 1970s. We classified ozone episode days based on the extent or absence of the lake breeze (i.e., “inland”, “near-shore” or “no” lake breeze) to establish a climatology of these events. This work demonstrated variable gradients in ozone abundances based on these different types of meteorology, with the sharpest ozone concentration gradients on days with a near-shore lake breeze. On 76–82% of days in which ozone reached 70 ppb for at least 1 h, a lake breeze was present. Evidence of ozone gradients from multiple observation platforms during the 2017 Lake Michigan Ozone Study (LMOS 2017) are shown for two days with different depths of lake breezes.

URLs/Downloads:

Record Details: