Standardized precipitation-evapotranspiration index (SPEI)

Sensitivity to potential evapotranspiration model and parameters

James H. Stagge, Lena M. Tallaksen, Chong Yu Xu, Henny A.J. Van Lanen

Research output: Chapter in Book/Report/Conference proceedingConference paper

30 Citations (Scopus)

Abstract

The Standardized Precipitation-Evapotranspiration Index (SPEI), a variant of the WMO-recommended Standardized Precipitation Index (SPI), has significant potential as a meteorological drought index because it uses a more comprehensive measure of water availability, climatic water balance. However, inclusion of PET, a derived term, requires rigorous testing before the index gains wide acceptance. This study addresses whether the SPEI differs significantly from the SPI and tests its sensitivity to the choice of PET method by first comparing derived PET and then SPEI/SPI across 3950 gridded land cells in Europe using five commonly used PET methods with different complexity and input requirements. The SPEI was found to differ significantly from the SPI and the resulting PET and SPEI values found to group according to the PET radiation term. The mass transfer term, which integrates wind speed and humidity/pressure, was found to have a secondary effect on PET and no detectable effect on SPEI.

Original languageEnglish
Title of host publicationHydrology in a Changing World
Subtitle of host publicationEnvironmental and Human Dimensions - Proceedings of FRIEND-Water 2014
EditorsEric Servat, Jean-Emmanuel Paturel, Alain Dezetter, Gregor Laaha, Jean-Francois Boyer, Denis Ruelland, Siegfried Demuth, Gil Mahe, Trevor M. Daniell, Henny A. J. van Lanen
PublisherCopernicus GmbH
Pages367-373
Number of pages7
ISBN (Electronic)9781907161414
Publication statusPublished - 2014
Event7th World Flow Regimes from International and Experimental Network Data-Water Conference, FRIEND-Water 2014 - Montpellier, France
Duration: 7 Oct 201410 Oct 2014

Publication series

NameIAHS-AISH Proceedings and Reports
Volume363
ISSN (Print)0144-7815

Conference

Conference7th World Flow Regimes from International and Experimental Network Data-Water Conference, FRIEND-Water 2014
CountryFrance
CityMontpellier
Period7/10/1410/10/14

Fingerprint

potential evapotranspiration
evapotranspiration
index
parameter
water availability
water budget
mass transfer
humidity
wind velocity
drought

Keywords

  • Drought
  • Drought Index
  • Meteorological Drought
  • Potential Evapotranspiration
  • Sensitivity
  • SPEI
  • SPI
  • Standardized Precipitation Index

Cite this

Stagge, J. H., Tallaksen, L. M., Xu, C. Y., & Van Lanen, H. A. J. (2014). Standardized precipitation-evapotranspiration index (SPEI): Sensitivity to potential evapotranspiration model and parameters. In E. Servat, J-E. Paturel, A. Dezetter, G. Laaha, J-F. Boyer, D. Ruelland, S. Demuth, G. Mahe, T. M. Daniell, ... H. A. J. van Lanen (Eds.), Hydrology in a Changing World: Environmental and Human Dimensions - Proceedings of FRIEND-Water 2014 (pp. 367-373). (IAHS-AISH Proceedings and Reports; Vol. 363). Copernicus GmbH.
Stagge, James H. ; Tallaksen, Lena M. ; Xu, Chong Yu ; Van Lanen, Henny A.J. / Standardized precipitation-evapotranspiration index (SPEI) : Sensitivity to potential evapotranspiration model and parameters. Hydrology in a Changing World: Environmental and Human Dimensions - Proceedings of FRIEND-Water 2014. editor / Eric Servat ; Jean-Emmanuel Paturel ; Alain Dezetter ; Gregor Laaha ; Jean-Francois Boyer ; Denis Ruelland ; Siegfried Demuth ; Gil Mahe ; Trevor M. Daniell ; Henny A. J. van Lanen. Copernicus GmbH, 2014. pp. 367-373 (IAHS-AISH Proceedings and Reports).
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title = "Standardized precipitation-evapotranspiration index (SPEI): Sensitivity to potential evapotranspiration model and parameters",
abstract = "The Standardized Precipitation-Evapotranspiration Index (SPEI), a variant of the WMO-recommended Standardized Precipitation Index (SPI), has significant potential as a meteorological drought index because it uses a more comprehensive measure of water availability, climatic water balance. However, inclusion of PET, a derived term, requires rigorous testing before the index gains wide acceptance. This study addresses whether the SPEI differs significantly from the SPI and tests its sensitivity to the choice of PET method by first comparing derived PET and then SPEI/SPI across 3950 gridded land cells in Europe using five commonly used PET methods with different complexity and input requirements. The SPEI was found to differ significantly from the SPI and the resulting PET and SPEI values found to group according to the PET radiation term. The mass transfer term, which integrates wind speed and humidity/pressure, was found to have a secondary effect on PET and no detectable effect on SPEI.",
keywords = "Drought, Drought Index, Meteorological Drought, Potential Evapotranspiration, Sensitivity, SPEI, SPI, Standardized Precipitation Index",
author = "Stagge, {James H.} and Tallaksen, {Lena M.} and Xu, {Chong Yu} and {Van Lanen}, {Henny A.J.}",
year = "2014",
language = "English",
series = "IAHS-AISH Proceedings and Reports",
publisher = "Copernicus GmbH",
pages = "367--373",
editor = "Eric Servat and Jean-Emmanuel Paturel and Alain Dezetter and Gregor Laaha and Jean-Francois Boyer and Denis Ruelland and Siegfried Demuth and Gil Mahe and Daniell, {Trevor M.} and {van Lanen}, {Henny A. J.}",
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Stagge, JH, Tallaksen, LM, Xu, CY & Van Lanen, HAJ 2014, Standardized precipitation-evapotranspiration index (SPEI): Sensitivity to potential evapotranspiration model and parameters. in E Servat, J-E Paturel, A Dezetter, G Laaha, J-F Boyer, D Ruelland, S Demuth, G Mahe, TM Daniell & HAJ van Lanen (eds), Hydrology in a Changing World: Environmental and Human Dimensions - Proceedings of FRIEND-Water 2014. IAHS-AISH Proceedings and Reports, vol. 363, Copernicus GmbH, pp. 367-373, 7th World Flow Regimes from International and Experimental Network Data-Water Conference, FRIEND-Water 2014, Montpellier, France, 7/10/14.

Standardized precipitation-evapotranspiration index (SPEI) : Sensitivity to potential evapotranspiration model and parameters. / Stagge, James H.; Tallaksen, Lena M.; Xu, Chong Yu; Van Lanen, Henny A.J.

Hydrology in a Changing World: Environmental and Human Dimensions - Proceedings of FRIEND-Water 2014. ed. / Eric Servat; Jean-Emmanuel Paturel; Alain Dezetter; Gregor Laaha; Jean-Francois Boyer; Denis Ruelland; Siegfried Demuth; Gil Mahe; Trevor M. Daniell; Henny A. J. van Lanen. Copernicus GmbH, 2014. p. 367-373 (IAHS-AISH Proceedings and Reports; Vol. 363).

Research output: Chapter in Book/Report/Conference proceedingConference paper

TY - GEN

T1 - Standardized precipitation-evapotranspiration index (SPEI)

T2 - Sensitivity to potential evapotranspiration model and parameters

AU - Stagge, James H.

AU - Tallaksen, Lena M.

AU - Xu, Chong Yu

AU - Van Lanen, Henny A.J.

PY - 2014

Y1 - 2014

N2 - The Standardized Precipitation-Evapotranspiration Index (SPEI), a variant of the WMO-recommended Standardized Precipitation Index (SPI), has significant potential as a meteorological drought index because it uses a more comprehensive measure of water availability, climatic water balance. However, inclusion of PET, a derived term, requires rigorous testing before the index gains wide acceptance. This study addresses whether the SPEI differs significantly from the SPI and tests its sensitivity to the choice of PET method by first comparing derived PET and then SPEI/SPI across 3950 gridded land cells in Europe using five commonly used PET methods with different complexity and input requirements. The SPEI was found to differ significantly from the SPI and the resulting PET and SPEI values found to group according to the PET radiation term. The mass transfer term, which integrates wind speed and humidity/pressure, was found to have a secondary effect on PET and no detectable effect on SPEI.

AB - The Standardized Precipitation-Evapotranspiration Index (SPEI), a variant of the WMO-recommended Standardized Precipitation Index (SPI), has significant potential as a meteorological drought index because it uses a more comprehensive measure of water availability, climatic water balance. However, inclusion of PET, a derived term, requires rigorous testing before the index gains wide acceptance. This study addresses whether the SPEI differs significantly from the SPI and tests its sensitivity to the choice of PET method by first comparing derived PET and then SPEI/SPI across 3950 gridded land cells in Europe using five commonly used PET methods with different complexity and input requirements. The SPEI was found to differ significantly from the SPI and the resulting PET and SPEI values found to group according to the PET radiation term. The mass transfer term, which integrates wind speed and humidity/pressure, was found to have a secondary effect on PET and no detectable effect on SPEI.

KW - Drought

KW - Drought Index

KW - Meteorological Drought

KW - Potential Evapotranspiration

KW - Sensitivity

KW - SPEI

KW - SPI

KW - Standardized Precipitation Index

M3 - Conference paper

T3 - IAHS-AISH Proceedings and Reports

SP - 367

EP - 373

BT - Hydrology in a Changing World

A2 - Servat, Eric

A2 - Paturel, Jean-Emmanuel

A2 - Dezetter, Alain

A2 - Laaha, Gregor

A2 - Boyer, Jean-Francois

A2 - Ruelland, Denis

A2 - Demuth, Siegfried

A2 - Mahe, Gil

A2 - Daniell, Trevor M.

A2 - van Lanen, Henny A. J.

PB - Copernicus GmbH

ER -

Stagge JH, Tallaksen LM, Xu CY, Van Lanen HAJ. Standardized precipitation-evapotranspiration index (SPEI): Sensitivity to potential evapotranspiration model and parameters. In Servat E, Paturel J-E, Dezetter A, Laaha G, Boyer J-F, Ruelland D, Demuth S, Mahe G, Daniell TM, van Lanen HAJ, editors, Hydrology in a Changing World: Environmental and Human Dimensions - Proceedings of FRIEND-Water 2014. Copernicus GmbH. 2014. p. 367-373. (IAHS-AISH Proceedings and Reports).