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 250-year drought catalogue for the island of Ireland (1765–2015)
TL;DR: In this article, the authors created a 250-year historic drought catalogue by applying the Standardized Precipitation Index (SPI) to the Island of Ireland precipitation network (1850-2015) and a reconstructed precipitation series from 1765.
Journal ArticleDOI
Drought Persistence Errors in Global Climate Models.
TL;DR: Comparisons of state-of-the‐art GCM model simulations to observation‐based data sets reveal systematic errors in the representation of drought persistence in current GCMs and suggest directions for further model improvement.
Book ChapterDOI
The NAO Impact on Droughts in the Mediterranean Region
Sergio M. Vicente-Serrano,Juan I. López-Moreno,Jorge Lorenzo-Lacruz,Ahmed El Kenawy,Cesar Azorin-Molina,Enrique Morán-Tejeda,Edmond Pasho,J. Zabalza,Santiago Beguería,Marta Angulo-Martínez +9 more
TL;DR: In this paper, the influence of the North Atlantic Oscillation (NAO) on droughts in the entire Mediterranean region between 1901 and 2006 is analyzed based on identification of positive and negative NAO winters and also detection of the anomalies of drought severity by means of the Standardized Precipitation Evapotranspiration Index (SPEI).
Journal ArticleDOI
Drought hazard transferability from meteorological to hydrological propagation
TL;DR: Wang et al. as discussed by the authors proposed a framework with the incorporation of copulas and a drought hazard propagation ratio (DHPR) to examine the drought propagation process, particularly to investigate the accompanying hazard transferability.
Journal ArticleDOI
Vineyards in transition: A global assessment of the adaptation needs of grape producing regions under climate change.
TL;DR: Changes in agro-climatic indicators derived from climatic variables as drivers for adaptation needs are considered and changes in three impact indicators - one drought indicator and two temperature ones - aimed at exploring the benefits of transition-based policies are presented.
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.
Book
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.