TY - JOUR
T1 - Interannual variability and decadal trend of global fractional vegetation cover from 1982 to 2000
AU - Zeng, Xubin
AU - Rao, Praveen
AU - DeFries, Ruth S.
AU - Hansen, Matthew C.
PY - 2003/10
Y1 - 2003/10
N2 - Fractional vegetation cover (FVC) is one of the most important variables in land surface modeling and also provides a continuous field to complement discrete land cover classification. A global 8-km FVC dataset for 1982-2000 is derived using the NOAA-NASA land Pathfinder normalized difference vegetation index data. The confidence in the dataset is provided by the insensitivity of the algorithm to the data resolution (between 1 and 8 km), the good agreement of the results with the field survey data over Germany, the consistency of the results with previous observational studies over the savannas in North Africa and the forests in Bolivia, and the robustness of the algorithm, as demonstrated by the small interannual variability of FVC over areas where anthropogenic land cover change is expected to be small, based on the 30-m Landsat data analysis. Significant interannual variability is found over shrubland, savanna, and grassland; both positive and negative trends exist over different areas of the same region in many parts of the world. In particular, the trend analysis pinpoints areas with statistically significant trends (i.e., "hotspots") for further study using higher-resolution satellite data and field-survey data.
AB - Fractional vegetation cover (FVC) is one of the most important variables in land surface modeling and also provides a continuous field to complement discrete land cover classification. A global 8-km FVC dataset for 1982-2000 is derived using the NOAA-NASA land Pathfinder normalized difference vegetation index data. The confidence in the dataset is provided by the insensitivity of the algorithm to the data resolution (between 1 and 8 km), the good agreement of the results with the field survey data over Germany, the consistency of the results with previous observational studies over the savannas in North Africa and the forests in Bolivia, and the robustness of the algorithm, as demonstrated by the small interannual variability of FVC over areas where anthropogenic land cover change is expected to be small, based on the 30-m Landsat data analysis. Significant interannual variability is found over shrubland, savanna, and grassland; both positive and negative trends exist over different areas of the same region in many parts of the world. In particular, the trend analysis pinpoints areas with statistically significant trends (i.e., "hotspots") for further study using higher-resolution satellite data and field-survey data.
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U2 - 10.1175/1520-0450(2003)042<1525:IVADTO>2.0.CO;2
DO - 10.1175/1520-0450(2003)042<1525:IVADTO>2.0.CO;2
M3 - Article
AN - SCOPUS:0344120346
VL - 42
SP - 1525
EP - 1530
JO - Journal of Applied Meteorology
JF - Journal of Applied Meteorology
SN - 0894-8763
IS - 10
ER -