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Spatiotemporal Response of Vegetation to Rainfall and Air Temperature Fluctuations in the Sahel: Case Study in the Forest Reserve of Fina, Mali

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Relation http://oar.icrisat.org/11854/
https://doi.org/10.3390/su13116250
doi:10.3390/su13116250
 
Title Spatiotemporal Response of Vegetation to Rainfall and Air Temperature Fluctuations in the Sahel: Case Study in the Forest Reserve of Fina, Mali
 
Creator Sanogo, K
Zemadim, B
Sanogo, S
Aishetu, A
Ba, A
 
Subject Rainfed Agriculture
 
Description Forests constitute a key component of the Earth system but the sustainability of the forest
reserves in the semi-arid zone is a real concern since its vegetation is very sensitive to the climate
fluctuation. The understanding of the mechanisms for the vegetation–climate interaction is poorly
studied in the context of African Sahel. In this study, the characteristics of the vegetation response
to the fluctuations of precipitation and temperature is determined for the forest reserve of Fina.
Rainfall estimates, air temperature and NDVI were re-gridded to a same spatial resolution and
standardized with respect to their respective long-term mean. Lag-correlations analysis was used to
estimate lag times between changes of climate variables and vegetation response at both seasonal and
interannual bases. Results show increasing tendency of NDVI started from the 1990s coinciding the
recovery of the rainfall from the 1980s drought, and the obtained correlation (r = 0.66) is statistically
significant (p value < 0.01). The strongest responses of vegetation to rainfall and temperature
fluctuations were found after 30 and 15 days, respectively. Moreover, at a shorter time lag (e.g.,
15 days), more pronounced vegetation responses to both rainfall and temperature were found in
agriculturally dominated land while at a longer time lag (e.g., 30 days), a stronger response was
observed in Bare-dominated land. The vegetation response to the climate fluctuation is modulated
by the land-use/cover dynamics.
 
Publisher MDPI
 
Date 2021-06
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://oar.icrisat.org/11854/1/sustainability-13-06250.pdf
Sanogo, K and Zemadim, B and Sanogo, S and Aishetu, A and Ba, A (2021) Spatiotemporal Response of Vegetation to Rainfall and Air Temperature Fluctuations in the Sahel: Case Study in the Forest Reserve of Fina, Mali. Sustainability (TSI), 13 (11). pp. 1-17. ISSN 2071-1050