Observations of Stable Isotopes in Rainwater in Madison Wisconsin

Rainwater samples in Madison WI were collected (between May and November 2019) and analyzed with a Picarro Cavity Ringdown Spectrometer to ascertain the stable isotopes within the rain. ¹⁸O and D₂O values were surprisingly variable (from -3 to -10 and from -15 to -73, respectively); This presentation will detail the approximately two dozen stable isotopes values and compare them to radar composites and weather patterns to determine whether that variability is a function of the forcing mechanism of the rainfall and/or the moisture source.