Effect of evapotranspiration parameterisation on the Palmer Drought Severity Index

Szilvia Horváth, István Jankó Szép, L. Makra, J. Mika, Ilona Pajtók-Tari, Zoltán Utasi

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The aim of the study is to compare two popular parameterisations of potential evapotranspiration, applied in computation of the Palmer Drought Severity Index. Among other differences, Thornthwaite method considers bare soil, whereas Blaney-Criddle method estimates evapotranspiration after specification of a given plant. Monthly PDSI series in the April-October growing season of maize are analysed at five stations in Eastern Hungary for the period 1901-1999. When using Blaney-Criddle method both the inter-annual and inter-monthly variability, i.e. standard deviation and auto-correlation decrease. Trends and regression coefficients to hemispheric temperature changes are smaller for latter parameterisation, as well. Synchronous correlation among the stations also decreases in this latter approach, whereas normality of the distribution remains valid in majority of months and stations.

Original languageEnglish
Pages (from-to)11-18
Number of pages8
JournalPhysics and Chemistry of the Earth
Volume35
Issue number1-2
DOIs
Publication statusPublished - 2010

Fingerprint

evapotranspiration
drought
Evapotranspiration
Drought
Parameterization
parameterization
stations
Autocorrelation
regression coefficients
normality
Hungary
potential evapotranspiration
bare soil
Specifications
Soils
autocorrelation
specifications
standard deviation
soils
growing season

Keywords

  • Blaney-Criddle
  • Evapotranspiration
  • Thornthwaite
  • Time and space variability

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics

Cite this

Effect of evapotranspiration parameterisation on the Palmer Drought Severity Index. / Horváth, Szilvia; Szép, István Jankó; Makra, L.; Mika, J.; Pajtók-Tari, Ilona; Utasi, Zoltán.

In: Physics and Chemistry of the Earth, Vol. 35, No. 1-2, 2010, p. 11-18.

Research output: Contribution to journalArticle

Horváth, Szilvia ; Szép, István Jankó ; Makra, L. ; Mika, J. ; Pajtók-Tari, Ilona ; Utasi, Zoltán. / Effect of evapotranspiration parameterisation on the Palmer Drought Severity Index. In: Physics and Chemistry of the Earth. 2010 ; Vol. 35, No. 1-2. pp. 11-18.
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