|
|||||
|
|
Recent drought and precipitation tendencies in Ethiopia |
|
| Authors: | Ellen Viste Diriba Korecha Asgeir Sorteberg |
| Institution: | 1. Geophysical Institute, University of Bergen, Bergen, Norway 2. National Meteorological Agency, Addis Ababa, Ethiopia 3. Bjerknes Centre for Climate Research, University of Bergen, Bergen, Norway |
| Abstract: | In 2011, drought in the Horn of Africa again made news headlines. This study aims to quantify the meteorological component of this and other drought episodes in Ethiopia since 1971. A monthly precipitation data set for 14 homogeneous rainfall zones was constructed based on 174 gauges, and the standardized precipitation index was calculated on seasonal, annual, and biannual time scales. The results point to 2009 as a year of exceptionally widespread drought. All zones experienced drought at the annual scale, although in most zones, previous droughts were more extreme. Nationally, 2009 was the second driest year, surpassed only by the historic year 1984. Linear regression analysis indicates a precipitation decline in southern Ethiopia, during both February–May and June–September. In central and northern Ethiopia, the analysis did not provide evidence of similar tendencies. However, spring droughts have occurred more frequently in all parts of Ethiopia during the last 10–15 years. |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ | |