TY - JOUR

T1 - Мезомасштабные вихри на континентальном склоне Новозеландского плато по данным альтиметрии

AU - Травкин, Владимир Станиславович

AU - Гневышев, Владимир Григорьевич

AU - Белоненко, Татьяна Васильевна

N1 - Травкин В. С., Гневышев В. Г., Белоненко Т. В. Мезомасштабные вихри на континентальном склоне Новозеландского плато по данным альтиметрии. Современные проблемы дистанционного зондирования Земли из космоса. 2024. Т. 21. № 3. С. 221–233. DOI: 10.21046/2070-7401-2024-21-3-221-233.

PY - 2024/7/2

Y1 - 2024/7/2

N2 - The aim of the study is to describe the features of vortex dynamics on the slope of the New Zealand Plateau. It has been established that on the southeastern slope of the New Zealand Plateau, vortex dynamics manifest in the eastward movement of two mesoscale vortex systems — cyclones and anticyclones, with anticyclones moving along the upper boundary of the continental slope and cyclones along the lower boundary. It is shown that the wave approach and exponential profile model allow describing the main characteristics of Rossby topographic waves propagating along the slope of the New Zealand Plateau. The bottom topography of the studied area is characterized by the following features: the New Zealand Plateau, located at a depth of approximately 500 m, sharply drops off to the southeast with a steep slope, beyond which lies the continental basin with depths reaching 5000 m. The gradients of depth changes in the transitional zone from the plateau to the continental basin are 3.75·10–2. Using the open data available on the CMEMS (Copernicus Marine Environment Monitoring Service) portal, we investigated the characteristics of vortex dynamics in this region. Estimates of the kinematic and dynamic parameters of vortices propagating on the slope of the New Zealand Plateau were obtained. It is shown that the wave approach and exponential profile model allow describing the main characteristics of Rossby topographic waves propagating along the slope of the New Zealand Plateau. For the exponential topography model, a calculation of the spectral eigenvalue problem was performed. Dispersion patterns, dependencies on wave number of phase and group velocities, and flow functions for two modes were constructed. It is demonstrated that the parameters of the vortices correspond to the central part of the dispersion curves, confirming the hypothesis of the topographic origin of the New Zealand Plateau vortices.

AB - The aim of the study is to describe the features of vortex dynamics on the slope of the New Zealand Plateau. It has been established that on the southeastern slope of the New Zealand Plateau, vortex dynamics manifest in the eastward movement of two mesoscale vortex systems — cyclones and anticyclones, with anticyclones moving along the upper boundary of the continental slope and cyclones along the lower boundary. It is shown that the wave approach and exponential profile model allow describing the main characteristics of Rossby topographic waves propagating along the slope of the New Zealand Plateau. The bottom topography of the studied area is characterized by the following features: the New Zealand Plateau, located at a depth of approximately 500 m, sharply drops off to the southeast with a steep slope, beyond which lies the continental basin with depths reaching 5000 m. The gradients of depth changes in the transitional zone from the plateau to the continental basin are 3.75·10–2. Using the open data available on the CMEMS (Copernicus Marine Environment Monitoring Service) portal, we investigated the characteristics of vortex dynamics in this region. Estimates of the kinematic and dynamic parameters of vortices propagating on the slope of the New Zealand Plateau were obtained. It is shown that the wave approach and exponential profile model allow describing the main characteristics of Rossby topographic waves propagating along the slope of the New Zealand Plateau. For the exponential topography model, a calculation of the spectral eigenvalue problem was performed. Dispersion patterns, dependencies on wave number of phase and group velocities, and flow functions for two modes were constructed. It is demonstrated that the parameters of the vortices correspond to the central part of the dispersion curves, confirming the hypothesis of the topographic origin of the New Zealand Plateau vortices.

KW - New Zealand Plateau

KW - Rossby topographic waves

KW - altimetry

KW - exponential model

KW - mesoscale eddies

UR - https://www.mendeley.com/catalogue/7b62c73e-3155-3ea8-b204-58fd9be6dc99/

U2 - 10.21046/2070-7401-2024-21-3-221-233

DO - 10.21046/2070-7401-2024-21-3-221-233

M3 - статья

VL - 21

SP - 221

EP - 233

JO - СОВРЕМЕННЫЕ ПРОБЛЕМЫ ДИСТАНЦИОННОГО ЗОНДИРОВАНИЯ ЗЕМЛИ ИЗ КОСМОСА

JF - СОВРЕМЕННЫЕ ПРОБЛЕМЫ ДИСТАНЦИОННОГО ЗОНДИРОВАНИЯ ЗЕМЛИ ИЗ КОСМОСА

SN - 2070-7401

IS - 3

ER -