Moisture source diagnostics and isotope characteristics for precipitation in east Hungary: implications for their relationship |
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| Authors: | Emese Bottyán Tamás Weidinger László Haszpra Krisztina Kármán |
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| Institution: | 1. Department of Meteorology, E?tv?s Loránd University, Budapest, Hungary;2. Hungarian Meteorological Service, Budapest, Hungary;3. Geodetic and Geophysical Institute, Research Centre for Astronomy and Earth Sciences, Hungarian Academy of Sciences, Sopron, Hungary;4. Institute for Geological and Geochemical Research, Research Centre for Astronomy and Earth Sciences, Hungarian Academy of Sciences, Budapest, Hungary |
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| Abstract: | Knowledge relating to the relationship between the characteristics of precipitation and sources of moisture is essential to improve our understanding of the global water cycle. This study presents the first quantitative estimation of the moisture source regions combined with stable isotope analyses for precipitation at K-puszta, east Hungary. The contributions of the following moisture sources were diagnosed according to the sector analysis of 4-day backward trajectories together with the calculation of evaporation and precipitation fluxes based on the specific humidity: Mediterranean region (57.0%), local moisture (14.8%), Atlantic region (14.2%), Northern Europe (7.4%) and Eastern Europe (6.6%). The δD and δ18O values of daily precipitation were measured and the deuterium excess (d-excess) was calculated. The d-excess showed systematic differences among the marine sources, reflecting the characteristics of the moisture source area. The results suggest that the stable isotope composition of precipitation preserves information regarding the origin of the water vapour. |
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| Keywords: | moisture source diagnostics stable isotope trajectory precipitation |
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