Tuesday, February 21, 2012

Global Drought Monitor: Online

The Global Drought Monitor  is a free internet application which monitors the severity of drought worldwide on an ongoing basis. The product will aid humanitarian relief by assisting warnings of potential food, water and health problems. The Global Drought Monitor  will also benefit the general public, government and industry by improving awareness of droughts and their impacts.

Drought is a deficiency in rainfall over an extended period of time. It is a recurrent feature of climate which happens almost everywhere. During 2005, for example, several countries in western Europe experienced extreme or exceptional drought. Severe droughts also affected countries in eastern and southern Africa, Niger, Thailand, Brazil and Australia. Droughts can have devastating effects on agriculture, livestock and water supplies. They also lead to other disasters, namely famine, malnutrition, epidemics and displacement of populations from one area to another. To mitigate the impacts of drought and to help save lives humanitarian aid agencies require early access to clear information on the geographic scale of drought, its strength and how many people are being affected.

Previous drought monitoring information has only been issued routinely on a regional basis. The Global Drought Monitor  provides a clear summary of current hydrological drought conditions worldwide. The product is updated monthly and has a spatial resolution of ~100km. Interactive elements allow users to select the prior period for drought assessment (1 to 36 months), to zoom in at several levels, to display the number of people affected by exceptional drought within a user-defined area, and to choose whether to display city names, rivers and lakes. Hydrological drought conditions are displayed based on the two leading drought indices called the Standardised Precipitation Index (SPI) and the Palmer Drought Severity Index (PDSI).

The Global Drought Monitor  is created and maintained by the award-winning Meteorological Hazards and Seasonal Forecasting group at the Benfield UCL Hazard Research Centre. The product builds on the group's expertise in drought assessment, drought prediction and on-line tracking and display of severe weather. 

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