Abstract
We studied the impacts of land use in temperate Argentina on the normalized difference vegetation index (NDVI), which has often been used to estimate the interception of photosynthetically active radiation and carbon uptake by terrestrial vegetation. The NDVI was derived from the National Oceanic and Atmospheric Administration (NOAA) satellites. We incorporated land use, climate, soil, and NDVI data into a geographic information system with a county-level spatial resolution. Land use was characterized in terms of the proportion of different crop types at the county level. Three attributes were derived from the seasonal dynamics of the NDVI: the annual integral (NDVI-I), the difference between the maximum and minimum NDVI divided by the integral (RREL), and the date of maximum NDVI (DMAX). The environmental controls of the NDVI attributes for the counties showing the lowest proportion of croplands (“low-impacted vegetation” areas, LIV) were analyzed using stepwise multiple regressions with the three NDVI a...
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