CJCZO -- Precipitation Chemistry -- Santa Catalina Mountains -- (2006-2019)

Precipitation samples were collected at 3 locations within each field site ( B2 Desert, Marshall Gulch and Oracle Ridge) on a weekly to twice weekly basis depending on precipitation events. Additionally an ISCO was installed in Marshall Gulch to collect daily snowmelt samples for stable water isotopes. Precipitation samples were analyzed in PI laboratories at the University of Arizona for anions (by IC), cations (by ICPOES and ICPMS), dissolved organic and inorganic carbon and total nitrogen (by acidification and combustion on a Schimadzu DOC/TN Analyzer), stable water isotopes (on a Los Gatos Cavity Ring Down Spectrometer), and nutrients (NH4-N and Orthophosphate on a Discrete Analyzer). Selected samples were analyzed for carbon stable isotopes of dissolved inorganic carbon (by IRMS). pH and conductivity on precipitation samples was measured in the laboratory.