Title :
Monitoring ecosystems vulnerable to climate change
Author_Institution :
Raytheon, Upper Marlboro, MD, USA
Abstract :
Using seventeen years of annual maximum value Normalized Difference Vegetation Index (NDVI) data, interannual variations in global vegetation dynamics are assessed. Comparisons are made between NDVI variability, rainfall, land cover classes and climate classes. Semi-arid regions covered by open shrublands exhibit the highest inter-annual variability among different land cover classes. These areas received a mean monthly rainfall of 10-30mm with a coefficient of variation in rainfall greater than 20% between years.
Keywords :
atmospheric techniques; climatology; ecology; geophysical techniques; rain; vegetation mapping; AD 1982 to 2000; NDVI; Normalized Difference Vegetation Index; annual maximum value; arid region; climate change; ecology; ecosystem monitoring; geophysical measurement technique; global dynamics; inter.. annual variations; land cover class; rain; rainfall; semiarid region; shrublands; spatial distribution; variability; vegetation response; vulnerable area; Calibration; Ecosystems; Land surface temperature; Monitoring; Ocean temperature; Satellites; Sea surface; Snow; Time series analysis; Vegetation mapping;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 2002. IGARSS '02. 2002 IEEE International
Print_ISBN :
0-7803-7536-X
DOI :
10.1109/IGARSS.2002.1026780
