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
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Variations in terrestrial water storage in the Lancang-Mekong river basin from GRACE solutions and land surface model
TL;DR: In this article, the terrestrial water storage dynamics of the Lancang-Mekong River basin, which has a total area of 795,000 km2 and distributed between six countries in Southeast Asia, based on the terrestrial Water Storage anomalies (TWSA) from the Gravity Recovery and Climate Experiment (GRACE) satellites and the Global Land Data Assimilation System (GLDAS) model.
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A monitoring and prediction system for compound dry and hot events
TL;DR: In this paper, a monitoring and prediction system of compound dry and hot events at the global scale is introduced, which consists of two indicators (Standardized Compound Event Indicator (SCEI) and a binary variable) that incorporate both hot and dry conditions for characterizing the severity and occurrence.
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Understanding and detecting super-extreme droughts in Southwest China through an integrated approach and index
TL;DR: In this article, the authors propose an integrated metric, the Comprehensive Multiscalar Indicator (CMI), as a new criterion for super-drought detection, which highlights the utility of the CMI.
Journal ArticleDOI
Spatial patterns of European droughts under a moderate emission scenario
TL;DR: In this paper, the authors investigated the spatial patterns of European droughts for the periods 1981-2010, 2041-2070, and 2071-2100, focusing on the projections under a moderate emissions scenario.
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Growth resistance and resilience of mixed silver fir and Norway spruce forests in central Europe: Contrasting responses to mild and severe droughts.
Alessandra Bottero,David I. Forrester,David I. Forrester,Maxime Cailleret,Ulrich Kohnle,Arthur Gessler,Arthur Gessler,Dominic Michel,Arun K. Bose,Arun K. Bose,Jürgen Bauhus,Harald Bugmann,Matthias Cuntz,Loïc Gillerot,Marc Hanewinkel,Mathieu Lévesque,James Ryder,Julien Sainte-Marie,Julia Schwarz,Rasoul Yousefpour,Juan Carlos Zamora-Pereira,Andreas Rigling,Andreas Rigling +22 more
TL;DR: In this paper, the authors used a unique combination of inventory and dendrochronological data from a long-term (>30 years) silvicultural experiment in mixed silver fir and Norway spruce mountain forests along a temperature and precipitation gradient in southwestern Germany.
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.