بسم الله الرحمن الرحيم. Weather Extreme events Over Sudan Recent Khartoum flood as example. Dr. Ahmed Mohamed Abdel Karim Director of SMA [email protected] What is Weather?. i) ‘State of atmosphere at a particular time and space as defined by the various meteorological elements. (WMO)
i) ‘State of atmosphere at a particular time and space as defined by the various meteorological elements. (WMO)
Climateis usually defined as the average weather, or more rigorously, as the statistical description in terms of the mean and variability of relevant quantities over a period of time ranging from months to thousands or millions of years.
WMO period: 30 years
Climate changerefers to a change in the state of the climate that can be identified (e.g., by using statistical tests) by
1-changes in the mean or variability of its properties,
2-and that persists for an extended period,
3-typically decades or longer.
Climate variabilityrefers to variations beyond individual weather events in the mean state and other statistics of the climate (such as standard deviations, the occurrence of extremes, etc.) on all spatial and temporal scales.
200 mm السودان
المقارنة بين المعدل المناخي 1941-1970 و المعدل المناخي 1971-2000م