Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2025, Vol. 22, No. 2, pp. 233-243
Main parameters of a mesoscale variability model of the Sea of Okhotsk based on satellite altimetry data
A.A. Romanov
1 , A.A. Romanov
1 1 AO Central Research Institute for Machine Building, Korolev, Moscow Region, Russia
Accepted: 25.02.2025
DOI: 10.21046/2070-7401-2025-22-2-233-243
The present study is aimed at determining the parameters of a mesoscale variability model of the Sea of Okhotsk based on satellite altimetry data. A methodological approach has been used to estimate the spatiotemporal characteristics that determine mesoscale variability of the surface of the Sea of Okhotsk under the assumption that the latter is described by a Gaussian function. The initial information was an array of altimetry data from the TOPEX/Poseidon and Jason-1, -2, -3 spacecrafts containing measurements of sea surface height anomalies from 1992 to 2022. Based on this information, spatiotemporal autocorrelation functions were constructed on a 2×2° spatial grid for 10×10° regions in the Sea of Okhotsk. The function parameters were determined for each grid node, and spatial distributions of the corresponding characteristics of the mesoscale variability of the distributions of sea surface height anomalies in the Sea of Okhotsk were obtained. It was shown that the characteristic radii of irregularities for the water area of the Sea of Okhotsk were 63 and 74 km in longitude and latitude, respectively, and the lifetime was about 54 days. There was a small movement of irregularities in the western and northern directions, but the speed of movement did not exceed 0.26 cm/s for each of the components of the speed of movement.
Keywords: satellite altimetry, optimal interpolation, mesoscale variability model parameters, Sea of Okhotsk, multivariate correlation function
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