Hydro-Meteorological Trends in an Austrian Low-Mountain Catchment

Gerald Krebs*, David Camhy, Dirk Muschalla

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

While ongoing climate change is well documented, the impacts exhibit a substantial variability, both in direction and magnitude, visible even at regional and local scales. However, the knowledge of regional impacts is crucial for the design of mitigation and adaptation measures, particularly when changes in the hydrological cycle are concerned. In this paper, we present hydro-meteorological trends based on observations from a hydrological research basin in Eastern Austria between 1979 and 2019. The analyzed variables include air temperature, precipitation, and catchment runoff. Additionally, the number of wet days, trends for catchment evapotranspiration, and computed potential evapotranspiration were derived. Long-term trends were computed using a non-parametric Mann–Kendall test. The analysis shows that while mean annual temperatures were decreasing and annual temperature minima remained constant, annual maxima were rising. Long-term trends indicate a shift of precipitation to the summer, with minor variations observed for the remaining seasons and at an annual scale. Observed precipitation intensities mainly increased in spring and summer between 1979 and 2019. Catchment actual evapotranspiration, computed based on catchment precipitation and outflow, showed no significant trend for the observed time period, while potential evapotranspiration rates based on remote sensing data increased between 1981 and 2019.
Original languageEnglish
Article number122
Number of pages17
JournalClimate
Volume9
Issue number8
DOIs
Publication statusPublished - Aug 2021

Keywords

  • hydrological research basin
  • precipitation
  • temperature
  • long-term trends
  • climate change
  • evapotranspiration
  • Climate change
  • Precipitation
  • Temperature
  • Evapotranspiration
  • Long-term trends
  • Hydrological research basin

ASJC Scopus subject areas

  • Atmospheric Science

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