Broadscale Vegetation Change Assessment across Nigeria from Coarse Spatial and High Temporal Resolution AVHRR Data
··· lezzter Preis 40.00 ··· 9783867275972 ··· 10361169852 ··· Nigeria`s vast land area is mostly covered with natural vegetation. The vegetation cover iswide-ranging and reflects past and present climatic variations. Nigeria`s vegetation cover israpidly changing due to natural and anthropogenic influences. Nigeria`s population growthrate is one of the highest in the world, where a large proportion of this population arepeasant farmers exploiting the rural environment. Previous studies have shown thatvegetation cover in some parts of Nigeria is fast declining. The report on theimplementation of Agenda 21 (UNCED, 1997) of the United Nations CommissionConference on Environment and Development (UNCED, 1992), which is a long-termglobal action plan for sustainable development, reported that there is still a persistentdecline in the general vegetation cover across Nigeria due to population pressure,overgrazing and continuous exploitation of marginal lands for various purposes. It thereforesuggests that periodic assessment and management of this vegetation cover for ecologicalsustainability would be highly desirable.With barely $280 GNP per capita and accumulated foreign debts of over US$28 billion, acost-effective approach to resource management and monitoring could be appropriate. Thisstudy employs the use of coarse spatial but high temporal resolution Advanced Very HighResolution Radiometer-Normalised Difference Vegetation Index (AVHRR-NDVI) datafrom the Pathfinder Land (PAL) dataset to identify and evaluate vegetation cover change.This data is administered by the National Oceanic Atmospheric Administration andNational Aeronautics Space Administration (NOAA/NASA) and is, most importantly,freely available. The datasets used were recomposed into monthly Maximum Value (MVC)and annual mean composites in order to assess broadly the changes in vegetation coveracross the whole of Nigeria. One hundred and twenty annual gridded point precipitationdata for 12 years at 1° resolution covering the whole country were acquired from the GlobalPrecipitation and Climatology Centre (GPCC), and were regressed linearly as a function of13 other variables in order to create models for estimating spatial rainfall data for the whole country. Hersteller: Cuvillier Verlag Marke: Cuvillier Verlag EAN: 9783867275972 Kat: Hardcover/Geisteswissenschaften, Kunst, Musik/Philosophie Lieferzeit: Sofort lieferbar Versandkosten: Ab 20¤ Versandkostenfrei in Deutschland Icon: https://www.inforius-bilder.de/bild/?I=NV%2F3tbs8dgY7Cwb9VhUwWxOj5nuq1JjFhkbaHqh1Ap4%3D Bild:
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