Trends of rainfall onset, cessation, and length of growing season in northern Ghana: comparing the rain gauge, satellite, and farmer's perceptions

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dc.creatorAtiah, W.A.
dc.creatorMuthoni, Francis K.
dc.creatorKotu, Bekele Hundie
dc.creatorKizito, Fred
dc.creatorAmekudzi, L.K.
dc.date2021-12-13
dc.date2022-02-07T11:18:38Z
dc.date2022-02-07T11:18:38Z
dc.date.accessioned2026-06-27T15:56:38Z
dc.descriptionRainfall onset and cessation date greatly influence cropping calendar decisions in rain-fed agricultural systems. This paper examined trends of onsets, cessation, and the length of growing season over Northern Ghana using CHIRPS-v2, gauge, and farmers’ perceptions data between 1981 and 2019. Results from CHIRPS-v2 revealed that the three seasonal rainfall indices have substantial latitudinal variability. Significant late and early onsets were observed at the West and East of 1.5° W longitude, respectively. Significant late cessations and longer growing periods occurred across Northern Ghana. The ability of farmers’ perceptions and CHIRPS-v2 to capture rainfall onsets are time and location-dependent. A total of 71% of farmers rely on traditional knowledge to forecast rainfall onsets. Adaptation measures applied were not always consistent with the rainfall seasonality. More investment in modern climate information services is required to complement the existing local knowledge of forecasting rainfall seasonality.
dc.formatapplication/pdf
dc.identifierhttps://hdl.handle.net/10568/117994
dc.identifier.urihttp://hdl.handle.net/123456789/118136
dc.languageen
dc.publisherMDPI
dc.rightsOpen Access
dc.sourceAtiah, W.A., Muthoni, F.K., Kotu, B., Kizito, F. & Amekudzi, L.K. (2021). Trends of Rainfall Onset, Cessation, and Length of Growing Season in Northern Ghana: Comparing the Rain Gauge, Satellite, and Farmer’s Perceptions. Atmosphere, 12(12): 1674, 1-20.
dc.subjectclimate change adaptation
dc.subjectrainfall
dc.subjectfarmers
dc.titleTrends of rainfall onset, cessation, and length of growing season in northern Ghana: comparing the rain gauge, satellite, and farmer's perceptions
dc.typeJournal Article

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Instituto Internacional de Agricultura Tropical (IITA)