A 9-year record of stable isotope ratios of precipitation in Eastern Hungary: Implications on isotope hydrology and regional palaeoclimatology

G. Vodila, L. Palcsu, I. Futó, Z. Szántó

Research output: Contribution to journalArticle

44 Citations (Scopus)

Abstract

The stable isotopic composition of hydrogen and oxygen of precipitation from Debrecen, Eastern Hungary was analysed in event-based samples collected from the beginning of 2001 to the end of 2009.During the monitoring period, the δ18O values varied between -22.3‰ and 6.64‰ and the δ2H values between -176.8‰ and 10.7‰. The LMWL for the monthly based data is close to the GMWL, but shows the effect of secondary evaporation of falling raindrops with lower intercept and slope. LMWL of each year shows highly different parameters due to differences in precipitation amount and summer temperatures, especially in the extreme years of 2002 and 2003. On the basis of our data, deuterium excess is considered to be the best parameter to reveal the extremities of dry and warm periods. Deuterium excess also proved to be a useful tool to show the different formation histories of certain precipitation events. Good correlation of δ18O with temperature was obtained for the samples. The slope of the δ18O-T functions for the whole sampling period was 0.32±0.03‰/°C for the monthly samples, however, a slope of 0.37±0.03‰/°C was obtained if monthly mean temperatures were replaced with the monthly mean temperatures of the rainy days. Considering the temperature dependency of the δ18O values in the past, it can be concluded that Δδ18O/ΔT relationship using monthly mean temperatures of the rainy days might be a better approach than monthly mean temperatures.

Original languageEnglish
Pages (from-to)144-153
Number of pages10
JournalJournal of Hydrology
Volume400
Issue number1-2
DOIs
Publication statusPublished - Mar 30 2011

Fingerprint

hydrology
stable isotope
isotope
temperature
deuterium
raindrop
palaeoclimatology
isotopic composition
evaporation
hydrogen
oxygen
sampling
summer
monitoring
history
parameter

Keywords

  • Deuterium excess
  • Hungary
  • Precipitation
  • Secondary evaporation
  • Stable isotopes
  • Temperature correlation

ASJC Scopus subject areas

  • Water Science and Technology

Cite this

A 9-year record of stable isotope ratios of precipitation in Eastern Hungary : Implications on isotope hydrology and regional palaeoclimatology. / Vodila, G.; Palcsu, L.; Futó, I.; Szántó, Z.

In: Journal of Hydrology, Vol. 400, No. 1-2, 30.03.2011, p. 144-153.

Research output: Contribution to journalArticle

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