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O. O. Trusenkova S. V. Stanichnyi Yu. B. Ratner 《Izvestiya Atmospheric and Oceanic Physics》2007,43(5):634-648
The expansion of wind fields observed at fixed times (four times daily) in complex empirical orthogonal functions is performed for the Japan Sea area (34°–53° N, 127°–143° E). The wind fields are taken from the 1998–2004 NCEP/NCAR Reanalysis data with better spatial resolution (1° × 1°) than the standard product, which are publicly available on the Internet. Major modes of wind variability in the Japan Sea area are identified. The modes determine a general direction of air-mass transport throughout a year, zonal and meridional modulation, and a cyclonic and an anticyclonic eddy component. Objective classification of wind fields with respect to the prevailing flow direction is performed, and wind stress and wind-curl patterns are obtained for major events in the cold and warm periods of the year. The pattern obtained can be used in hydrodynamic numerical models of the general circulation of the Japan Sea. 相似文献
2.
Obtained are the estimates of the Black Sea level trends for the period of 1992–2005 as derived from the tide-gage and satellite altimetry data. An estimated rate of the mean sea level rate calculated from the averaged altimetry data is 7.6 ± 0.3 mm/year that is by 2–3 times higher than the estimates for the previous periods. Such high values of the trend are evidently associated with the sea level variability features at the 10-year temporal scale. The Black Sea level trend is characterized by the high spatial variability: it amounts to 8–9.5 mm/year in the coastal areas of the Black Sea basin that exceeds the trend in the deep-water part by 1.5–2 times (4.5–6 mm/year). Such distribution is an effect of the cyclonic Rim Current intensification. Based on the difference in the sea level trends obtained from in-situ and altimetry measurements, the velocity of the vertical crustal motion is estimated for the Ukrainian coastal stations of the Black Sea. 相似文献
3.
E. M. Lemeshko A. N. Morozov S. V. Stanichnyi L. D. Mee G. I. Shapiro 《Physical Oceanography》2008,18(6):319-331
The profiles of absolute current velocity obtained by using a lowered acoustic doppler current profiler (LADCP) are presented. In the course of the BSERP-3 expedition, the measurements were carried out in the regions of the Rim Current, anticyclonic eddy, and northwest shelf.
In the core of the Rim Current, a unidirectional motion of waters is traced in layers below the main pycnocline down to depths
greater than 500 m. Its characteristic velocity can be as high as 0.08 m/sec. It is shown that the direct action of the eddy
is detected in the shelf region at distances larger than 20 km from the outer edge of the shelf in the zone bounded by an
isobath of 100 m. The formation of multilayer vertical structures in the field of current velocities is revealed in the region
of interaction of the anticyclonic eddy with irregularities of the bottom on the side of the shelf. A two-layer structure
of currents with specific features in the layer of formed seasonal pycnocline is observed in the region of the shelf down
to an isobath of 100 m. The profiles of the moduli of vertical shears of currents averaged over the casts ensemble are presented
for the abyssal and shelf parts of the sea. It is shown that the shears induced by the geostrophic currents and wave processes
in the region of the main pycnocline are comparable. Below the pycnocline, the shears are mainly determined by the wave processes.
Translated from Morskoi Gidrofizicheskii Zhurnal, No. 6, pp. 25–37, November–December, 2008. 相似文献
4.
We analyze the errors of airborne radiometric measurements of the infrared upwelling radiation I
x of the surface performed using conventional and modified procedures (with calibrators in the form of flat reflecting mirror-like surfaces oriented to reflect the measured radiation I
x to the radiometer in the process of calibration) for the modes of operation of a radiometer with and without thermostatic control. We propose relations for finding I
x as well as for the instrumental and procedural errors and give recommendations for their reduction. It is shown that the modified procedure leads to smaller errors than the conventional procedure. 相似文献
5.
D. A. Yarovaya V. V. Efimov M. V. Shokurov S. V. Stanichnyi V. S. Barabanov 《Physical Oceanography》2008,18(3):154-167
A long-living mesoscale cyclone observed over the Black Sea in September 2005 was characterized by a high wind velocity (25
m/sec) and induced an abnormal lowering of the sea-surface temperature (by more than 10°C). We performed the numerical simulation
of this cyclone by using the MM5 model and the data of global operative analysis. The evolution of the cyclone and its structure
similar to the structure of a tropical cyclone are reproduced. The primary azimuthal and secondary radial circulations, the
clear-sky eye with warm core at medium levels, and the eyewall with strong air updraft and intense convection and precipitation
are well visible. The fluxes of sensible and latent heat on the sea surface played the key role in the initiation and development
of this cyclone.
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Translated from Morskoi Gidrofizicheskii Zhurnal, No. 3, pp. 41–55, May–June, 2008. 相似文献
6.
Observations of a quasi-tropical cyclone over the Black Sea 总被引：1，自引：0，他引：1
V. V. Efimov S. V. Stanichnyi M. V. Shokurov D. A. Yarovaya 《Russian Meteorology and Hydrology》2008,33(4):233-239
A rare atmospheric phenomenon in the Black Sea region is described: a mesoscale cyclone with all main properties of tropical cyclones. The cyclone developed in the southwestern part of the sea and existed for about five days. General characteristics of the cyclone are presented along with its effect on thermodynamic structure of the sea upper layer. 相似文献
7.
V. M. Kushnir E. Hansen L. A. Petrenko V. K. Pavlov A. N. Morozov S. V. Stanichnyi S. V. Fedorov 《Physical Oceanography》2007,17(5):278-295
The numerical analysis of the stationary field of current velocity on the upper boundary of the bottom boundary layer in the
Barents Sea is performed on the basis of a simplified model taking into account the fields of wind velocity and density of
water for the principal periods of the seasonal cycle and the bottom topography. The analysis is based on the climatic BarKode database and the data on the wind velocity over the Barents Sea for the last 50 yr. The numerical results demonstrate that
the field of bottom currents is fairly nonuniform and the current velocities vary from several fractions of 1 cm/sec to 5
cm/sec in the zones with noticeable slopes of the bottom. The estimates of the thickness of the bottom boundary layer are
obtained for the constant coefficient of bottom friction C
f
= 0.04. In the major part of the water area of the Barents Sea, the thickness of the bottom boundary layer is close to 1
m. In the regions with significant slopes of the bottom, it increases to 2–2.5 m and, in the two zones of intensification
of the bottom currents, becomes as large as 5 m. The maximum estimate of the coefficient of turbulent viscosity is close to
5 cm2/sec. The mean value of the coefficient of vertical density diffusion K
S
is equal to 2.34 cm2/sec and its standard deviation is equal to 1.52 cm2/sec.
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Translated from Morskoi Gidrofizicheskii Zhurnal, No. 4, pp. 31–49, September–October, 2007. 相似文献
8.
A.?A.?KubryakovEmail author M.?V.?Shokurov S.?V.?Stanichnyi 《Russian Meteorology and Hydrology》2016,41(10):691-697
The seasonal and interannual variability ofcloud fraction over the Black Sea region for the period of1985-2009 is analyzed using the CM SAF dataset obtained from the satellite measurements of a high-resolution AVHRR instrument. The features of geographic distribution and seasonal variations in cloudiness are investigated. The causes for its spatial inhomogeneity in different months are analyzed. It is demonstrated using the long-term dataset that the dramatic decrease in the amount of cloudiness occurred over the Black Sea region from 67% in 1985 to 54% in 2008. The value of the trend is -0.4% per year. Both the trends and the features of interannual variability of cloudiness, in particular, strongly pronounced four-year cycles, are in antiphase with variations in sea surface temperature. The cloudiness reduction accompanied by the increase in the influx of short-wave radiation may be the basic reason for the warming and sea surface temperature variations in the Black Sea region. 相似文献
9.
A.?A.?Kubryakov V.?G.?PolnikovEmail author F.?A.?Pogarskii S.?V.?Stanichnyi 《Russian Meteorology and Hydrology》2016,41(2):130-135
The results of computation of wind wave fields for two versions of the WAM model (the original version of the European wind wave model WAM4 and its modified version WAM4-M) are compared with satellite measurements. The mapped data on the daily averaged wave height obtained from the data of combined measurements of several satellite altimeters are used. Significant correlation between wind wave series for both models and satellite data is demonstrated as well as the advantage of the WAM4-M model over its original version in accuracy and some statistical parameters of comparison with the altimeter. Advantages and shortcomings of numerical and remote sensing methods of wind wave investigation at the ocean scales are noted. 相似文献
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