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  • Drought: Advances in Monitoring, Preparedness, and Understanding Drought Characteristics x
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Richard R. Heim Jr. and Michael J. Brewer

problem on a continental and global scale (see Table 1 for the distinction between the Global Drought Monitor, Global Drought Monitor Portal, Global Drought Information System, and Global Drought Early Warning System). Table 1. Acronyms used in this paper. Every continent has regions and climates that are susceptible to drought, including semiarid areas that are especially vulnerable to drought. In North America and Europe today, drought impacts are largely economic ( Markandya 2010 ). However, in

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Sergio M. Vicente-Serrano, Santiago Beguería, Jorge Lorenzo-Lacruz, Jesús Julio Camarero, Juan I. López-Moreno, Cesar Azorin-Molina, Jesús Revuelto, Enrique Morán-Tejeda, and Arturo Sanchez-Lorenzo

found for the Atlantic basins of North America, the basins of central Europe, and some basins of South America and Africa. On the contrary, poor correlations were found in the Asian basins, mainly those that drain to the Arctic Ocean. Nevertheless, in the latter basins, when monthly correlations were analyzed separately, noticeable seasonal impacts were observed since correlations were much higher in July ( Figure 4c ) than in January ( Figure 4b ). In addition, in these zones it is clearly observed

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Di Long, Bridget R. Scanlon, D. Nelun Fernando, Lei Meng, and Steven M. Quiring

significant trend. 3.5. Comparison of the results with other studies Reduced ETR and a more pronounced increase in T l relative to T h over ~50% of stations in the HP are consistent with previous studies with a general trend of increasing T l at a greater rate relative to T h globally (e.g., Alexander et al. 2006 ; Easterling et al. 1997 ; Jones et al. 1999 ; Russo and Sterl 2011 ) and regionally like Europe and China (e.g., Hu et al. 2010 ; Tank and Konnen 2003 ; Yan et al. 2002 ; Yao et

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