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.
No comments:
Post a Comment