Dominant patterns of AVHRR NDVI interannual variability over the Sahel and linkages with key climate signals (1982-2003)

Physics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

7

Global Change: Climate Variability (1635, 3305, 3309, 4215, 4513), Geographic Location: Africa, Biogeosciences: Remote Sensing, Hydrology: Time Series Analysis (3270, 4277, 4475), Biogeosciences: Climate Dynamics (1620)

Scientific paper

The spatio-temporal evolution of Sahelian vegetation is analyzed using the Normalized Difference Vegetation Index (NDVI) obtained from the NOAA/AVHRR sensor (1982-2003). Dominant patterns are identified using rotated EOFs. While the first four modes are associated with specific bio-geo-climatic conditions in space, significant time scales are detected using a multi-tapers method. Three interannual time scales (~6.2-, 4.5- and 3.6-year) are present in the first and third NDVI modes over the western Sahel. A quasi-biennial time scale (~2.6-year) is present in second and fourth NDVI modes over the northeast Sahel. During summer, significant lagged correlations are found between the NDVI second (9-month lag) and third (10-month lag) modes, the meridional Atlantic Sea Surface Temperature (SST) gradient, and the zonal SST gradient in the Indian Ocean. Potential physical linkages and dynamics with known climate fluctuations are discussed.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Dominant patterns of AVHRR NDVI interannual variability over the Sahel and linkages with key climate signals (1982-2003) does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Dominant patterns of AVHRR NDVI interannual variability over the Sahel and linkages with key climate signals (1982-2003), we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dominant patterns of AVHRR NDVI interannual variability over the Sahel and linkages with key climate signals (1982-2003) will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-1359750

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.