Journal ArticleDOI
A Multiscalar Drought Index Sensitive to Global Warming: The Standardized Precipitation Evapotranspiration Index
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In this article, a new climatic drought index, the standardized precipitation evapotranspiration index (SPEI), is proposed, which combines multiscalar character with the capacity to include the effects of temperature variability on drought assessment.Abstract:
The authors propose a new climatic drought index: the standardized precipitation evapotranspiration index (SPEI). The SPEI is based on precipitation and temperature data, and it has the advantage of combining multiscalar character with the capacity to include the effects of temperature variability on drought assessment. The procedure to calculate the index is detailed and involves a climatic water balance, the accumulation of deficit/surplus at different time scales, and adjustment to a log-logistic probability distribution. Mathematically, the SPEI is similar to the standardized precipitation index (SPI), but it includes the role of temperature. Because the SPEI is based on a water balance, it can be compared to the self-calibrated Palmer drought severity index (sc-PDSI). Time series of the three indices were compared for a set of observatories with different climate characteristics, located in different parts of the world. Under global warming conditions, only the sc-PDSI and SPEI identified an...read more
Citations
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Journal ArticleDOI
A drought index accounting for snow
TL;DR: In this paper, the authors introduce an extension to the standardized precipitation index, the Standardized Snow Melt and Rain Index (SMRI), that accounts for rain and snow melt deficits, which effectively influence streamflow.
Journal ArticleDOI
How to improve attribution of changes in drought and flood impacts
Heidi Kreibich,Veit Blauhut,Jeroen C. J. H. Aerts,Laurens M. Bouwer,Henny A. J. Van Lanen,Alfonso Mejia,Marjolein Mens,Anne Van Loon +7 more
TL;DR: For the development of sustainable, efficient risk management strategies for the hydrological extremes of droughts and floods, it is essential to understand the temporal changes of impacts as mentioned in this paper.
Journal ArticleDOI
An integrated package for drought monitoring, prediction and analysis to aid drought modeling and assessment
TL;DR: An integrated R package for drought monitoring, prediction and analysis is presented and a wide range of its applications for drought modeling and assessment based on univariate and multivariate drought indices for both operational and research purposes are illustrated.
Journal ArticleDOI
Soil moisture trends in the Czech Republic between 1961 and 2012
Miroslav Trnka,Rudolf Brázdil,Martin Možný,Martin Možný,Petr Štěpánek,Petr Dobrovolný,Pavel Zahradníček,J. Balek,Daniela Semerádová,M. Dubrovský,Petr Hlavinka,Josef Eitzinger,Brian D. Wardlow,Mark Svoboda,Michael J. Hayes,Zdeněk Žalud +15 more
TL;DR: In this paper, the authors introduced an innovation to the standard methodological approaches in evaluating drought trajectory by analysing soil moisture conditions over more than 50 years, focusing on the dynamic simulation of soil moisture with high temporal (daily) and spatial (500 m)resolution in a diverse landscape.
Journal ArticleDOI
Insights from a New High-Resolution Drought Atlas for the Caribbean Spanning 1950–2016
Dimitris A. Herrera,Toby R. Ault +1 more
TL;DR: In this paper, a high-resolution dataset for the Caribbean from 1950 to 2016, using monthly estimates of the self-calibrating Palmer Drought Severity Index (scPDSI), with the physically based Penman-Monteith approximation for the potential evapotranspiration, was introduced.
References
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Climate change 2007: the physical science basis
Susan Solomon,Dahe Qin,Martin R. Manning,Melinda Marquis,Kristen Averyt,Melinda M.B. Tignor,H. L. Miller,Z. Chen +7 more
TL;DR: The first volume of the IPCC's Fourth Assessment Report as mentioned in this paper was published in 2007 and covers several topics including the extensive range of observations now available for the atmosphere and surface, changes in sea level, assesses the paleoclimatic perspective, climate change causes both natural and anthropogenic, and climate models for projections of global climate.
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Crop evapotranspiration : guidelines for computing crop water requirements
TL;DR: In this paper, an updated procedure for calculating reference and crop evapotranspiration from meteorological data and crop coefficients is presented, based on the FAO Penman-Monteith method.
The relationship of drought frequency and duration to time scales
TL;DR: The definition of drought has continually been a stumbling block for drought monitoring and analysis as mentioned in this paper, mainly related to the time period over which deficits accumulate and to the connection of the deficit in precipitation to deficits in usable water sources and the impacts that ensue.