Environmental & Climate Sciences Department Seminar

"Organics in Cloud Water: Measurements from the Present Day and from Decades Past at Whiteface Mountain"

Presented by Sara Lance, SUNY Albany

Thursday, November 5, 2020, 11:00 am — Blue Jeans

An emerging trend of increasing organic carbon (OC) has been observed in cloud water over the past decade at Whiteface Mountain (WFM) in Upstate New York, correlated with a growing inorganic ion imbalance and a growing abundance of ammonium. The driving factors behind these changes and potential impacts on secondary organic aerosol mass are not clear, underlining the need to better characterize the chemical makeup of the organic constituents in cloud water. Low molecular weight organic acids were added to the routine suite of cloud water chemical measurements at WFM beginning in 2018. The organic component of cloud water residuals (the particles left behind after droplets evaporate) was further characterized using a high resolution time-of-flight aerosol mass spectrometer. Comparisons between all of these measurements and historical observations at WFM are discussed, and a plan for future measurements of aerosol and cloud droplet residual composition is described.

Hosted by: Ernie Lewis

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