排序方式： 共有13条查询结果，搜索用时 15 毫秒
1.
Izvestiya, Atmospheric and Oceanic Physics - The paper considers steric level fluctuations in the northern Atlantic Ocean. We use a method that combines AVISO altimetry and GRACE gravity... 相似文献
2.
T. V. Belonenko A. A. Kubrjakov S. V. Stanichny 《Izvestiya Atmospheric and Oceanic Physics》2016,52(9):920-928
Using satellite altimetry measurement data for 1993–2013, we study the spectral characteristics of Rossby waves in the Northwestern Pacific (25°–50° N, 140°–180° E). For each latitude degree, we draw integral plots of spectral power density calculated with a two-dimensional Fourier transform (2D-FFT). We compare the dispersion equations of Rossby waves calculated from the WKB-approximation and an approximation of a two-layer ocean model with the empirical velocities determined by the slope of isopleths by the Radon method; also, we compare the dispersion equations with the spectral distributions of level variations. It is shown that the main energy of Rossby waves in the Northwestern Pacific corresponds to the first baroclinic mode. At almost all latitudes, there is good agreement between the empirical phase velocities calculated by isopleths by the Radon method and the theoretical values; also, the spectral peaks correspond to graphs of the dispersion equations for the first baroclinic mode Rossby waves, except for the Kuroshio region, where some peaks correspond to the second mode. 相似文献
3.
Zhmur V. V. Novoselova E. V. Belonenko T. V. 《Izvestiya Atmospheric and Oceanic Physics》2021,57(6):632-641
Izvestiya, Atmospheric and Oceanic Physics - The potential vorticity (PV) in the ocean is considered, including the history of the term. Various aspects and basic formulas used to calculate the PV... 相似文献
4.
Malysheva A. A. Kubryakov A. A. Koldunov A. V. Belonenko T. V. 《Izvestiya Atmospheric and Oceanic Physics》2020,56(12):1581-1589
Izvestiya, Atmospheric and Oceanic Physics - The study of mesoscale eddies provides an understanding of entire systems of interconnected oceanic characteristics. Mesoscale eddies have their own... 相似文献
5.
Izvestiya, Atmospheric and Oceanic Physics - We analyze high-resolution hydrodynamic modeling data using the Massachusetts Institute of Technology general circulation model (MITgcm), which is a... 相似文献
6.
Zhmur V. V. Belonenko T. V. Novoselova E. V. Suetin B. P. 《Doklady Earth Sciences》2023,507(3):S457-S460
Doklady Earth Sciences - When mesoscale vortices interact with the flow, there are three variants of their behavior: rotation, nutational oscillations, and unlimited elongation. This work describes... 相似文献
7.
Oceanology - Variations in the Brunt–Väisälä frequency caused by mesoscale eddies of different polarity are analyzed. The Lofoten Basin in the Norwegian Sea is the study... 相似文献
8.
Igor Bashmachnikov Tatyana Belonenko Pavel Kuibin Denis Volkov Victor Foux 《Ocean Dynamics》2018,68(12):1711-1725
Mean radial distributions of various dynamic characteristics of the permanently existing anticyclonic Lofoten vortex (LV) in the Norwegian Sea are obtained from an eddy-permitting regional hydrodynamic MIT general circulation model. It is shown that the model adequately reproduces the observed 3D thermohaline and dynamic structure of the vortex. The obtained radial distribution of the mean vertical velocity is found to form a complex structure: with the upward fluxes along the axis in and above the anticyclonically rotating LV core, compensated by the downward fluxes in the vortex skirt. These vertical motions maintain the vortex potential energy anomaly against dissipation. This secondary circulation is generated by the centrifugal force and, to a lesser extent, by the horizontal dispersion of the vortex energy, both intensified towards the sea surface. Below the vortex core, the maximum downward vertical velocity converges towards the vortex axis with depth. At these depth levels, the secondary circulation is forced by Ekman divergence in the bottom mixed layer. The theory of columnar vortices with helical structure, applied to the LV, relate the radial profiles of the vertical velocity with those of the horizontal circulation. The theoretically predicted the radial patterns of the mean vertical velocity in the LV were close to those, obtained from the primitive equation ocean model, when approximating the radial patterns of the azimuthal velocity with the Rayleigh profile. 相似文献
9.
The sea level variability in the Northwestern Pacific based on the observations at tide-gage stations of JASL system is considered. The long-term seasonal variations of the sea level at these stations are presented and the climatic trends, variability range, and standard deviations of monthly mean values of the sea level from the long-term seasonal values are computed. The frequency of the sea level exceeding relative to the moving average with the shift of 30 days is computed. It is shown that, contrary to general opinion, the frequency of the sea level exceeding relative to the moving average in the Northwestern Pacific does not increase on the whole under conditions of the climate warming and sea level rise. 相似文献
10.
Oceanology - The article examines low-frequency oscillations of sea level over the Beaufort Sea shelf simulated in a high-resolution regional configuration of the Massachusetts Institute of... 相似文献