thule_precip_isotope_2012.xls

2H and 18O isotopic composition of precipitation at Thule Air Base, Greenland. Picarro L2130 18O/2H CRDS w/IM induction module, manual injection of samples w/o vaporizer. Snow and rain water collected during various precipitation events in summer 2012 and snow pack water from May 2012. Samples are analyzed by placing a sample on filter paper, enclosing the filter paper in a metal clip, and sealing the sample in a glass vial. The IM module then vaporizes the sample and passes the gas to the CRDS. Three reps of every sample were measured but only the last used to minimize memory effects. Values are relative to Mean Ocean Water VSMOW standard, instrument working standards were VSMOW and GISP. Two worksheets, "all data" indicates raw machine output of all parameters and every measurement. Reduced mean values for 18O and 2h with identification. Columns are: date and time of analysis, date sample was collected, location of sample or standard used, type of sample, further description such as time of day or depth in snow pack, 18O (‰), 2H (‰).