Long-term spatial-temporal trends and variability of rainfall over Eastern and Southern Africa
This study investigates the spatial-temporal trends and variability of rainfall within East and South Africa (ESA) region. The newly available Climate Hazards group Infrared Precipitation with Stations (CHIRPS-v2) gridded data spanning 37 years (1981 to 2017) was validated against gauge observations...
| Main Authors: | , , , , , , , |
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| Format: | Journal Article |
| Language: | Inglés |
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Springer
2019
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10568/98834 |
| _version_ | 1855532759640965120 |
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| author | Muthoni, Francis K. Odongo, Vincent O. Ochieng, Justus Mugalavai, Edward M. Mourice, Sixbert K. Hoesche-Zeledon, Irmgard Mwila, Mulundu Bekunda, Mateete A. |
| author_browse | Bekunda, Mateete A. Hoesche-Zeledon, Irmgard Mourice, Sixbert K. Mugalavai, Edward M. Muthoni, Francis K. Mwila, Mulundu Ochieng, Justus Odongo, Vincent O. |
| author_facet | Muthoni, Francis K. Odongo, Vincent O. Ochieng, Justus Mugalavai, Edward M. Mourice, Sixbert K. Hoesche-Zeledon, Irmgard Mwila, Mulundu Bekunda, Mateete A. |
| author_sort | Muthoni, Francis K. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | This study investigates the spatial-temporal trends and variability of rainfall within East and South Africa (ESA) region. The newly available Climate Hazards group Infrared Precipitation with Stations (CHIRPS-v2) gridded data spanning 37 years (1981 to 2017) was validated against gauge observations (N = 4243) and utilised to map zones experiencing significant monotonic rainfall trends. Standardised annual rainfall anomalies revealed the spatial-temporal distribution of below and above normal rains that are associated with droughts and floods respectively. Results showed that CHIRPS-v2 data had a satisfactory skill to estimate monthly rainfall with Kling-Gupta efficiency (KGE = 0.68 and a high temporal agreement (r = 0.73) while also preserving total amount (β = 0.99) and variability (γ = 0.8). Two contiguous zones with significant increase in annual rainfall (3–15 mm year−1) occurred in Southwest Zambia and in Northern Lake Victoria Basin between Kenya and Uganda. The most significant decrease in annual rainfall (− 20 mm year−1) was recorded at Mount Kilimanjaro in Tanzania. Other significant decreases in annual rainfall ranging between − 4 and − 10 mm year−1 were observed in Southwest Tanzania, Central-South Kenya, Central Uganda and Western Rwanda. CHIRPS-v2 rainfall product provides reliable high spatial resolution information on amount of rainfall that can complement sparse rain gauge network in rain-fed agricultural systems in ESA region. The observed spatial-temporal trends and variability in rainfall are important basis for guiding targeting of appropriate adaptive measures across multiple sectors. |
| format | Journal Article |
| id | CGSpace98834 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2019 |
| publishDateRange | 2019 |
| publishDateSort | 2019 |
| publisher | Springer |
| publisherStr | Springer |
| record_format | dspace |
| spelling | CGSpace988342025-02-19T13:51:42Z Long-term spatial-temporal trends and variability of rainfall over Eastern and Southern Africa Muthoni, Francis K. Odongo, Vincent O. Ochieng, Justus Mugalavai, Edward M. Mourice, Sixbert K. Hoesche-Zeledon, Irmgard Mwila, Mulundu Bekunda, Mateete A. farming systems intensification climate change water This study investigates the spatial-temporal trends and variability of rainfall within East and South Africa (ESA) region. The newly available Climate Hazards group Infrared Precipitation with Stations (CHIRPS-v2) gridded data spanning 37 years (1981 to 2017) was validated against gauge observations (N = 4243) and utilised to map zones experiencing significant monotonic rainfall trends. Standardised annual rainfall anomalies revealed the spatial-temporal distribution of below and above normal rains that are associated with droughts and floods respectively. Results showed that CHIRPS-v2 data had a satisfactory skill to estimate monthly rainfall with Kling-Gupta efficiency (KGE = 0.68 and a high temporal agreement (r = 0.73) while also preserving total amount (β = 0.99) and variability (γ = 0.8). Two contiguous zones with significant increase in annual rainfall (3–15 mm year−1) occurred in Southwest Zambia and in Northern Lake Victoria Basin between Kenya and Uganda. The most significant decrease in annual rainfall (− 20 mm year−1) was recorded at Mount Kilimanjaro in Tanzania. Other significant decreases in annual rainfall ranging between − 4 and − 10 mm year−1 were observed in Southwest Tanzania, Central-South Kenya, Central Uganda and Western Rwanda. CHIRPS-v2 rainfall product provides reliable high spatial resolution information on amount of rainfall that can complement sparse rain gauge network in rain-fed agricultural systems in ESA region. The observed spatial-temporal trends and variability in rainfall are important basis for guiding targeting of appropriate adaptive measures across multiple sectors. 2019-08 2018-12-19T16:15:44Z 2018-12-19T16:15:44Z Journal Article https://hdl.handle.net/10568/98834 en Open Access Springer Muthoni, F.K., Odongo, V.O., Ochieng, J., Mugalavai, E.M., Mourice, S.K., Mourice, I., Mwila, M. and Bekunda, M. 2018. Long-term spatial-temporal trends and variability of rainfall over Eastern and Southern Africa. Theoretical and Applied Climatology |
| spellingShingle | farming systems intensification climate change water Muthoni, Francis K. Odongo, Vincent O. Ochieng, Justus Mugalavai, Edward M. Mourice, Sixbert K. Hoesche-Zeledon, Irmgard Mwila, Mulundu Bekunda, Mateete A. Long-term spatial-temporal trends and variability of rainfall over Eastern and Southern Africa |
| title | Long-term spatial-temporal trends and variability of rainfall over Eastern and Southern Africa |
| title_full | Long-term spatial-temporal trends and variability of rainfall over Eastern and Southern Africa |
| title_fullStr | Long-term spatial-temporal trends and variability of rainfall over Eastern and Southern Africa |
| title_full_unstemmed | Long-term spatial-temporal trends and variability of rainfall over Eastern and Southern Africa |
| title_short | Long-term spatial-temporal trends and variability of rainfall over Eastern and Southern Africa |
| title_sort | long term spatial temporal trends and variability of rainfall over eastern and southern africa |
| topic | farming systems intensification climate change water |
| url | https://hdl.handle.net/10568/98834 |
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