Essays about: "NDVI and Rainfall"

Showing result 16 - 20 of 20 essays containing the words NDVI and Rainfall.

1. 16. Assessing vegetation changes for parts of the Sudan and Chad during 2000-2010 using time series analysis of MODIS-NDVI

   University essay from Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

   Author : Salem Beyene Ghezahai; [2011]
   Keywords : geography; physical geography; NDVI; MODIS; TIMESAT; time series; land cover; temporal variation; spatial variation; rainfall; phenological parameters; vegetation; Earth and Environmental Sciences;

   Abstract : Phenological vegetation characteristics are valuable inputs to several ecosystem-related models: including carbon exchange and climate change. Phenological characteristics are effective measures of changes in vegetation in an area and are subject to the seasonal and inter-annual climatic variations. READ MORE

3. 17. Using remotely sensed data to explore spatial and temporal relationships between photosynthetic productivity of vegetation and malaria transmission intensities in selected parts of Africa

   University essay from Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

   Author : Fredros Oketch Okumu; [2011]
   Keywords : vegetation production; vegetation index; geographical information systems; remote sensing; malaria transmission; NDVI; EIR; Earth and Environmental Sciences;

   Abstract : Spatial and temporal variations in malaria transmission are naturally associated with prevailing climatic and environmental factors, for example rainfall, humidity, temperature and human activities. These factors influence malaria transmission mainly in non-deterministic ways, making them less appropriate for accurate geographical mapping of malaria risk. READ MORE

4. 18. Climate variability and satellite : observed vegetation responses in Tanzania

   University essay from Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

   Author : Wilbert Timiza; [2011]
   Keywords : NOAA-AVHRR-NDVI; rainfall; sea surface temperature; Tanzania; trend; correlation; climate variability; Earth and Environmental Sciences;

   Abstract : 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

5. 19. Analysing environmental change in semi-arid areas in Kordofan, Sudan

   University essay from Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

   Author : Tobias Hinderson; [2004]
   Keywords : naurgeografi; climatology; cartography; desertification; vegetation pattern; physical geography; Sahara; pedology; geomorphology; geomorfologi; marklära; kartografi; klimatologi; Earth and Environmental Sciences;

   Abstract : Forskning har visat på en trendökning i NOAA NDVI för Sahelområdet under perioden 1982-1999. Dessa observationer kan indikera att vegetationsmängden i området är ökande. Förändringen kan tolkas som en återhämtning från torkan som drabbade området under 1970- och 1980-talen. READ MORE

6. 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 ekosystemvetenskap

   Author : Martin Sjöström; [2004]
   Keywords : marklära; desertification; semi-arid; Sahara; physical geography; geomorphology; pedology; cartography; climatology; geomorfologi; naturgeografi; kartografi; klimatologi; Earth and Environmental Sciences;

   Abstract : 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