Vegetation dynamics in relation with climate over Nigeria from 1982 to 2011

摘要: Vegetation dynamics in Nigeria were assessed using the GIMMS AVHRR NDVI3g bimonthly data and NASA’s Modern Era Retrospective Analysis for Research Applications (MERRA) monthly climate from 1982 to 2011. The employed, included air temperature, precipitation humidity (at 2 m). results indicated that annual mean NDVI increased by 0.03 × 10−4 NDVI/year of Nigeria’s total vegetative area. About 94.7 % area showed positive trends mostly southern part country, while 5.3 negative northern part. At country scale, vegetation significantly correlated with temperature (p < 0.001, C(r) = −0.733), 0.742) 0.787). 85.0, 52.4 57.1 pixels correlation between respectively 15.7, 47.6, 42.9 negatively respectively. Similarly, difference wet dry-seasonal was also obtained represented as ΔNDVI, ΔT, ΔH, ΔP vegetation, individual correlations ΔNDVI ΔH produced −0.386, 0.100 0.251 Moreover, covariance −0.04, 3.57 0.06 This means a decrease resulted increase vice versa. However, humidity; an one quantity rather increase. All seasonal changes low, but arguably, ΔT better relationship followed then ΔP. It therefore suggestive influenced other factors like demography land use. Also, current activity sensitive previous month’s humidity, which occurred after 1, 4 months work spatial–temporal variations growth affected precipitation, Nigeria. not all attributed variables. Human activities during study period. is step climate-change monitoring Nigeria, will serve contribution ongoing research works on change monitoring.