Научная электронная библиотека ULRICH'S Periodicals Directory

Сибирский государственный университет
науки и технологий имени академика М.Ф. Решетнева

Сибирский аэрокосмический журнал
ISSN 2712-8970 (Print) ISSN 2782-5760 (on-line)

Сведения об образовательной организации

UDK 528.8; 551.46
INVESTIGATION OF GRADIENT FIELDS OF THE EARTH SURFACE BASED ON SATELLITE DATA
A. V. Kartushinsky1,2*, N. A. Kukoba1
1Siberian Federal University 79, Svobodny Av., Krasnoyarsk, 660041, Russian Federation 2Institute of Biophysics SB RAS 50, Akademgorodok, Krasnoyarsk, 660036, Russian Federation *E-mail: kartalvas@rambler.ru
To determine the horizontal structure of the physical and biological heterogeneities calculated are time-space gra-dients based on long-term satellite data. AVHRR MCSST, CZCS, SeaWIFS, MIRAS AQUARIUS, MODIS, MSS and NOAA, TERRA, AQUA, SPOT, LANDSAT picture images were used as input satellite data. Satellite data was used to calculate mean gradient fields of temperature, salinity and chlorophyll concentration in the ocean for different periods of time. The software calculates and averages the horizontal gradients in the ocean for different grids. Calculations are also made to find zonal, meridian, and absolute gradients, pointing to main frontal zones. The gradient fields and their high values give us information about spatial distribution of main frontal zones in the ocean. For study of the gradient field surface in aquatic systems realized is the averaging algorithm for dynamic object. Gradient of land surface shows changes of relief as steady state object. Space-time variability of gradient fields in the ocean has been received. Here we used satellite data on sea surface temperature, sea surface salinity and chlorophyll concentration. The main stage of research is evaluation of statistical correlation between gradients of temperature and chlorophyll concentration, which suggests a combined effect of physical and biological processes. Horizontal temperature and turbidity fields were con-sidered for small object as Lake Shira (Russia, Khakasia) based on satellite data. Gradient zones of land relief were tested on satellite images. In this case, software ENVI 4.7 and IDL were used to calculate absolute (modulo) gradients surface height. Though idealized, our results suggest the importance of surface gradient parameters for the measuring from space.
Keywords: calculation of gradients, sea surface frontal zones, the interaction of physical and biological fields, sur-face heterogeneity, variability.
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Kartushinsky Aleksey Vasil’evich – Cand. Sc., Docent, Institute of Space and Information Technologies, Siberian Federal University; senior researcher, Institute of Вiophysics RAS. E-mail: kartalvas@rambler.ru.

Kukoba Nikolay Andreevich – postgraduate student, Institute of Space and Information Technologies, Siberian Federal University. E-mail: ku-ru07@inbox.ru.