caa a22 4500 46903761X CHVBK 20180323132759.0 cr unu---uuuuu 170328e19920401xx s 000 0 eng 10.1007/BF00142424 doi (NATIONALLICENCE)springer-10.1007/BF00142424 Sivakumar M. International Crops Research Institute for the Semi-Arid Tropics (ICRISAT) Sahelian Center, B.P. 12404, Niamey, Niger aut Climate change and implications for agriculture in Niger [Elektronische Daten] [M. Sivakumar] Five-year moving averages of annual rainfall for 21 locations in Niger showed a decline in the annual rainfall after 1960. Correlation coefficients of the moving averages of monthly rainfall with annual rainfall showed significant correlations between the decline in the annual rainfall with decreased rainfall in August. Analysis of daily rainfall data for rainy season parameters of interest to agriculture suggested that from 1965 there was a significant decrease in the amount of rainfall and in the number of rainy days in the months of July and August, resulting in a decreased volume of rainfall for each rainstorm. In comparison to the period 1945-64, major shifts have occurred in the average dates of onset and ending of rains during 1965-88. The length of the growing season was reduced by 5-20 days across different locations in Niger. The standard deviation for the onset and ending of the rains as well as the length of the growing season has increased, implying that cropping has become more risky. Water balance calculations also demonstrated that the probability of rainfall exceeding potential evapotranspiration decreased during the growing season. The implications of these changes for agriculture in Niger are discussed using field data. Kluwer Academic Publishers, 1992 Climatic Change Kluwer Academic Publishers 20/4(1992-04-01), 297-312 0165-0009 20:4<297 1992 20 10584 https://doi.org/10.1007/BF00142424 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00142424 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Sivakumar M. International Crops Research Institute for the Semi-Arid Tropics (ICRISAT) Sahelian Center, B.P. 12404, Niamey, Niger aut NATIONALLICENCE 773 0- Climatic Change Kluwer Academic Publishers 20/4(1992-04-01), 297-312 0165-0009 20:4<297 1992 20 10584 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer