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    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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    Journal Article (5.097Mb)
    Date
    2021-12-13
    Author
    Atiah, W.A.
    Muthoni, F.K.
    Kotu, B.H.
    Kizito, F.
    Amekudzi, L.K.
    Type
    Journal Article
    Review Status
    Peer Review
    Target Audience
    Scientists
    Metadata
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    Abstract/Description
    Rainfall 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.
    https://doi.org/10.3390/atmos12121674
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/7766
    IITA Authors ORCID
    Muthoni, Francishttps://orcid.org/0000-0001-6785-0550
    Bekele Hundie Kotuhttps://orcid.org/0000-0001-5788-6461
    Fred Kizitohttps://orcid.org/0000-0002-7488-2582
    Digital Object Identifier (DOI)
    https://doi.org/10.3390/atmos12121674
    Research Themes
    Biometrics; Natural Resource Management
    IITA Subjects
    Agronomy; Climate Change; Crop Systems; Food Security; Food Systems
    Agrovoc Terms
    Farmers; Rainfall; Climate Change Adaptation
    Regions
    Africa; West Africa
    Countries
    Ghana
    Hubs
    Eastern Africa Hub; Headquarters and Western Africa Hub
    Journals
    Atmosphere
    Collections
    • Journal and Journal Articles4835
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