Cold trap water vapour isotope measurements during the CAESAR campaign

Stable water isotopes (δ18O, δ2H) from the University of Bergen Cold Trap (UBCT) that was aboard the NSF NCAR C-130 aircraft for the CAESAR (Cold Air Outbreak Experiment in the Sub-Arctic Region) campaign. Samples have been collected in a cold trap consisting of a cryocooler operating at -80ºC as described in Seidl (2025). Sample vials are analysed on a moist background air stream and calibrated to VSMOW-SLAP scale using laboratory standards in use at FARLAB, University of Bergen, Norway. Analytical uncertainty has been estimated from the average uncertainty of replicates of laboratory standards. This current version includes data from flights RF06 only. Samples from RF01, RF02, RF04, RF05, RF07, RF09, and RF10 are in analysis. Temporal coverage Begin datetime 2024-02-28 11:40:00End datetime 2024-04-03 16:00:59 Spatial coverage Maximum (North) Latitude: 82.00,Minimum (South) Latitude: 66.00,Minimum (West) Longitude: -14.00,Maximum (East) Longitude: 24.00,