Search results for "RAINY-SEASON"

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Characterization of the interannual and intraseasonal variability of West African vegetation between 1982 and 2002 by means of NOAA AVHRR NDVI data

2007

AbstractThe interannual and intraseasonal variability of West African vegetation over the period 1982–2002 is studied using the normalized difference vegetation index (NDVI) from the Advanced Very High Resolution Radiometer (AVHRR).The novel independent component analysis (ICA) technique is applied to extract the main modes of the interannual variability of the vegetation, among which two modes are worth describing. The first component (IC1) describes NDVI variability over the Sahel from August to October. A strong photosynthetic activity over the Sahel is related to above-normal convection and rainfall within the intertropical convergence zone (ITCZ) in summertime and is partly associated …

Mediterranean climateWet seasonAtmospheric Science010504 meteorology & atmospheric sciencesAdvanced very-high-resolution radiometerATMOSPHERIC DYNAMICS0211 other engineering and technologies02 engineering and technology01 natural sciencesNormalized Difference Vegetation IndexRAINY-SEASONPHENOLOGYEL-NINO[ SDU.ENVI ] Sciences of the Universe [physics]/Continental interfaces environmentPrecipitation[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environmentINDEX021101 geological & geomatics engineering0105 earth and related environmental sciencesAIR-TEMPERATUREINDEPENDENT COMPONENT ANALYSISIntertropical Convergence Zone15. Life on landSea surface temperature13. Climate actionClimatologySEA-SURFACE TEMPERATUREPRECIPITATIONEnvironmental scienceOutgoing longwave radiationSAHEL RAINFALL
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