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Seasonality and trends of snow‐cover, vegetation index, and temperature in northern Eurasia
Author(s) -
Dye Dennis G.,
Tucker Compton J.
Publication year - 2003
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2002gl016384
Subject(s) - normalized difference vegetation index , environmental science , vegetation (pathology) , climatology , photosynthetically active radiation , seasonality , snow , enhanced vegetation index , atmospheric sciences , physical geography , snow cover , plant cover , biomass (ecology) , land cover , vegetation index , climate change , geography , canopy , land use , meteorology , geology , ecology , photosynthesis , oceanography , medicine , botany , archaeology , pathology , biology
We examine seasonal variability in snow‐cover, normalized difference vegetation index (NDVI), and temperature in a broad region of northern Eurasia, and the spatial and temporal correspondence among trends in these variables between 1982 and 1999. Our results support the contention that the previously reported springtime “greening” trend in northern Eurasian land areas arises from a combination of: (1) the direct effects of declining snow‐cover on surface spectral reflectance and NDVI, and (2) enhanced vegetation growth and green biomass stimulated by warmer air temperatures and potentially greater vegetation absorption of photosynthetically active radiation (PAR) during the period of annual peak solar irradiance.