Multiyear trends of Normalized Difference Vegetation Index and temperature in the south of Krasnoyarsk Krai

被引：0
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作者：
A. P. Shevyrnogov
M. Yu. Chernetskiy
G. S. Vysotskaya
机构：
[1] Russian Academy of Sciences,Institute of Biophysics, Siberian Branch
[2] Russian Academy of Sciences,Institute of Computational Modeling, Siberian Branch
[3] Siberian Federal University,undefined
来源：
Izvestiya, Atmospheric and Oceanic Physics | 2013年 / 49卷
关键词：
NDVI; MODIS; AVHRR; GIMMS; air temperature; radiation temperature of surface; trends; northern Eurasia; Yermakovsk raion;
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摘要：
It is found that the nonlinear positive Normalized Difference Vegetation Index (NDVI) trend of mountain taiga in the south of Krasnoyarsk Krai has been negative since 1999–2000. A comparison with the boreal belt of northern Eurasia showed that, though still nonnegative, the positive trend has distinctly decreased to nearly a plateau. A trend analysis of radiation temperature of the surface revealed that the temperature shows a decreasing trend for the selected region of mountainous taiga and an increasing trend for northern Eurasia. We compared air-temperature data from the Yermakovskoe meteorological station to eliminate a preliminary data-processing error. Regression analysis demonstrated a fairly high degree of correlation. Also, we found a quite high degree of correlation between time series and trends of air temperature and NDVI. Trends in air temperature in northern Eurasia according to NCEP-DOE Reanalysis 2 data also confirm the trend found on the basis of satellite data.
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页码：1047 / 1056
页数：9
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