Using a low-order model to detect and characterize tornadoes in multiple-Doppler radar data

By C. Potvin, Alan Shapiro, Tian-You Yu, Jidong Gao, Ming Xue. 2006

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Selective drought-induced decline of pine species in southeastern Spain (2012, background): “The scPDSI shows more negative values in years with more severe drought (Wells et al. 2004).”
SPEI-Based Approach to Agricultural Drought Monitoring in Vojvodina Region (2019, methodology): “The analysis of the SPI, SPEI, PDSI, Palmer Z [17], and self-calibrated PDSI (SC-PDSI [19]) indices in [20] shows the advantages of the SPEI in drought monitoring resulting from its multiscalar character and effectiveness in identification and classification of agricultural drought.”
Climate shocks and political violence (2014, background): “These data, while widely used and commonly accepted, are not without drawbacks, as there is not a single consensus in the meteorological literature as to how drought should be measured (Guttman, 1998; Wells et al., 2004; Vicente-Serrano et al., 2010).”
Global synthesis of drought effects on cereal, legume, tuber and root crops production: A review (2017, methodology): “We used water availability ratio instead of the widely-accepted drought intensity indices such as Palmer index because most of the studies were controlled experiments (i.e., comparing irrigated conditions and irrigation reduction instead of observing natural rainfall deficit) (Wells et al., 2004).”