Essays about: "greenness index"
Showing result 16 - 20 of 20 essays containing the words greenness index.
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16. Climate variability and satellite : observed vegetation responses in Tanzania
University essay from Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskapAbstract : Climate and vegetation growth of an area are interrelated processes; both take place on small to global scales. However, climate change and variability impacts on vegetation in most places in the world including Tanzania is of great concern since vegetation supports many socio-economic sectors, and plays a crucial role in atmospheric greenhouse gas moderation. READ MORE
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17. Comparison of vegetation indices to determine their accuracy in predicting spring phenology of Swedish ecosystems
University essay from Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskapAbstract : Phenological observations of terrestrial ecosystems are useful in monitoring the changes in the local climate due to their relatively long time series and high temporal resolution. However performing field based phenological observations can be a labour intensive and time consuming process. READ MORE
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18. Potential of Hyperion imagery for simulation of MODIS NDVI and AVHRR-consistent NDVI time series in a semi-arid region
University essay from Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskapAbstract : Long time series of satellite remotely sensed Normalized Difference Vegetation Index (NDVI) as an indicator of vegetation greenness can be used in a broad range of research topics such as climate change, vegetation dynamics and desertification monitoring. The first phase of this study tests a practical method using Hyperion imagery onboard on Earth Observing-1 (EO1) spacecraft for simulation of MODerate resolution Imaging Spectroradiometer (MODIS) NDVI and prediction of Advanced Very High Resolution Radiometer (AVHRR) NDVI data series in a semi-arid region in New Mexico, USA in 2007. READ MORE
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19. Snow cover dynamics and plant phenology documentation using digital camera images and their relation with CO2-fluxes at Stordalen mire, northern Sweden
University essay from Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskapAbstract : This report investigates the utilization of digital camera images (DCIs), sensitive in the visible part of the spectrum, for documentation of seasonal and inter-annual variations in snow cover and plant phenology. The DCIs used were transformed to orthographic images (ortho-image) from ordinary oblique DCIs taken between January 2001 and December 2003 at a sub- arctic mire (Stordalen) in northern Sweden. READ MORE
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20. Investigating vegetation changes in the African Sahel 1982-2002 : a comparative analysis using Landsat, MODIS and AVHRR remote sensing data
University essay from Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskapAbstract : There has been much debate concerning the concept of degradation and desertification in semi-arid lands, in particular semi-arid Sub-Saharan Africa, during the last two decades. However, recent findings suggest a consistent trend of increasing satellite-derived vegetation greenness in much of the African Sahel as interpreted from Pathfinder Advanced Very High Resolution Radiometer (AVHRR) Normalized Difference Vegetation Index (NDVI) data for the period 1982-1999. READ MORE
