Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2023, Vol. 20, No. 5, pp. 232-245
Features of the circulation of the northwestern Pacific Ocean according to satellite altimetry data
A.A. Romanov
1 , A.A. Romanov
1 1 AO Central Research Institute for Machine Building, Korolev, Moscow Region, Russia
Accepted: 25.08.2023
DOI: 10.21046/2070-7401-2023-20-5-232-245
The integrated products that have recently appeared, containing continuous measurements of successive TOPEX/Poseidon, Jason-1, -2, and -3 missions, provide unique opportunities for studying interannual, as well as identifying features of monthly and seasonal circulation in the water area for the entire period of altimetry observations from space. The paper discusses the results of studies of the hydrological regime of the eastern coast of Kamchatka in the summer-autumn period of 2020. The distributions of the sea surface height anomalies, as well as the distributions of the absolute dynamic topography for the Kamchatka region and the entire northern part of the Pacific Ocean with different time averaging are presented. An analysis of the features of circulation in the studied regions is presented, and the revealed differences in the regimes on the average monthly and average seasonal distributions of the absolute dynamic topography of the ocean surface for the period 1992–2020 are discussed. Peculiarities in the behavior of its values in different parts of the water area are revealed: an increase in the level of the branch of the North Pacific Current from 60 to 90 cm and higher, as well as an increase in the level of absolute topography in the area of the Aleutian Islands and in the open part of the Pacific Ocean by 20–30 cm, depending on time period. The nature of changes in the average monthly and average seasonal distributions of the sea surface height anomalies is discussed, a significant change in the considered characteristic in the southwestern part in the spring and autumn months is demonstrated: the anomaly variations ranged from –10 to 15 cm.
Keywords: satellite altimetry, ocean remote sensing, ocean surface dynamics, east coast of Kamchatka, northwestern Pacific Ocean, sea surface height anomalies, absolute dynamic topography
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