Relationship between atmospheric circulation and stable isotope composition of Belgrade daily precipitation

Abstract

Daily precipitation was collected in the period from May to December 2010, along with the corresponding meteorological data (air temperature, humidity, amount of precipitation) in the Vinca Institute of Nuclear Sciences (44°45′33″ ″N, 20°35′57″ ″E), Belgrade, Serbia. On the basis of backward trajectory analysis, three dominant trajectory categories are determined: southwestern Europe (SW), northeastern Europe (NE), and northwestern Europe (NW), which were associated with 49 (71%) of the events. The highest daily δ18O and δ2H values were measured on 9 December (-1.3 and-8.7, respectively), whereas the lowest values were measured on 28 December (-143.2% and-19.3%, respectively). Circulation back trajectories, synoptic-scale surface and middle-tropospheric weather maps, and δ2H and δ2O values for 69 precipitation samples, were examined to determine the origin and direction of the air masses for each event.