ISSN 2070-7401 (Print), ISSN 2411-0280 (Online)
Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa


Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2017, Vol. 14, No. 3, pp. 225-234

Variations of red and near-infrared reflectance and NDVI of tundra vegetation as a function of substrate moisture

S.G. Kornienko 1 
1 Oil and Gas Research Institute RAS, Moscow, Russia
Accepted: 07.02.2017
DOI: 10.21046/2070-7401-2017-14-3-225-234
Variations in red and near infrared (IR) reflectance and index NDVI of tundra vegetation in response to changes in the volume content of moisture in the substrate and soil have been studied in laboratory on vegetation and substrate samples. Wetter substrate of living moss produces higher near-IR reflectance and NDVI but lower reflectance in the red band. Reflectance in both spectral bands decreases, while NDVI increases, as the moisture content increases in the substrate of shrub-lichen-grass and dead moss. The reflectance in both spectral bands and NDVI are lower in the case of wetter silt soil. These results indicate that NDVI variations in tundra vegetation are not always direct response to change in the chlorophyll content and green mass abundance. The estimates of substrate moisture variations based on satellite imagery of very high resolution can be more accurate in the case of joint interpretation of NDVI and red and near-IR reflectance patterns.
Keywords: reflectance, substrate moisture, NDVI, tundra vegetation, silt soil
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