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1.
Yu. V. Artamonov A. E. Bukatov N. M. Solovei E. A. Skripaleva 《Physical Oceanography》2005,15(4):203-210
By using the linear theory of internal waves in a continuously stratified ideal incompressible liquid of finite depth and
hydrological data, we study the dispersion properties and space structure of the vertical velocity of the first mode of free
internal waves in the Atlantic Ocean. The dependence of the characteristics of waves on the hydrological structure of waters
is analyzed.
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Translated from Morskoi Gidrofizicheskii Zhurnal, No. 4, pp. 3–10, July–August, 2005. 相似文献
2.
S. I. Kondratev V. V. Dolotov Yu. G. Moiseev Yu. T. Shchetinin 《Physical Oceanography》2000,10(3):257-272
We performed a search for local coastal submarine springs of fresh water in the region from Cape Feolent to Cape Sarych (down
to an isobath of 40m). Stable submarine springs of brackish water with the minimum salinity of 5.5‰ and the minimum total
output of 30,000 m3/day were discovered only near the west wall of Cape Aiya. It is shown that brackish waters discharging from these springs
spread over the sea surface in the form of a thin layer (up to 1 m in thickness) characterized by lower salinity, higher transparency,
and an elevated content of silicic acid. We make a conjecture that the appearance of 2–3-m-thick layers of water with higher
transparency and lower salinity at depths of 5–8 m is explained by the discharge of unknown bottom springs of underground
fresh water.
Translated by Peter V. Malyshev and Dmitry V. Malyshev 相似文献
3.
We study trapped baroclinic topographic waves in the northwest shelf of the Black Sea for the actual slopes of the bottom
and stratification. The time scales of trapped waves are determined. The space scales of the amplitude of oscillations are
computed. It is shown that the vertical distribution of the amplitude of oscillations is in qualitative agreement with the
experimentally observed distribution. The energy of topographic waves trapped by the sloping bottom is concentrated in the
bottom layer, which agrees with the data of measurements.
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Translated from Morskoi Gidrofizicheskii Zhurnal, No. 5, pp. 44–52, September–October, 2006. 相似文献
4.
The results of field studies of the beach dynamics and the continental slope (over the depth range from 0 to 5 m) of the Anapa
spit barrier that were carried out in 2002–2005 using ten lateral profiles are presented. The analysis of the location of
the submarine ridges based on the data of 1992 up to a depth of 11 m has shown that the configuration thereof facilitates
the transport of sediments to the southeast, thus bypassing Cape Anapa. No resultant accumulation of beach-forming sediments
on the southeastern flank of the spit barrier occurs within the submarine slope bordering the high coast, thus provoking the
active erosion of the town beach over the last 25–30 years. The main reasons for this are the tectonic deformation of the
coastal region and the submarine slope between the harbor and the central part of the town beach, as well as the change in
the azimuth orientation of the resultant waves from 135° in the 1960s–1970s to 210° over the past decade. The relatively stable
coast and the regions of intense erosion of the accumulative body of the Anapa spit barrier were revealed on the basis of
the measurements and the analysis of the topographic data. 相似文献
5.
We study nonlinear three-wave interactions between edge waves propagating in the same direction over the shelf step. The conditions
of synchronism are determined and the coefficient of interaction is computed for the cases where the waves of the five lowest
modes participate in the interaction. The space-time dynamics is studied by analyzing, as an example, a single triad of edge
waves. The possibility of interaction of edge waves in the regions with actual topography is demonstrated.
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Translated from Morskoi Gidrofizicheskii Zhurnal, No. 3, pp. 3–19, May–June, 2008. 相似文献
6.
Within the framework of the linear theory of long waves, we study forced oscillation of liquid in a ring basin of variable
depth by using numerical methods. As a generator of waves, we use periodic (in time) variations of atmospheric pressure. The
action of the Coriolis force is taken into account. The liquid is regarded as homogeneous and inviscid. We analyze the dependences
of the structure of the free wave surface (the number and location of nodal lines) on the period and space distribution of
disturbing pressures.
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Translated from Morskoi Gidrofizicheskii Zhurnal, No. 2, pp. 11–23, March–April, 2005. 相似文献
7.
8.
Motohiko Kashima Shin-Ichi Ito Kaoru Ichikawa Shiro Imawaki Shin-Ichiro Umatani Hiroshi Uchida Takashi Setou 《Journal of Oceanography》2009,65(1):73-80
A quasiperiodic variation of 100–110 days in the Kuroshio path off Cape Ashizuri, resulting from the passage of small meanders,
was detected by observation with moored current meters during 1993–1995. TOPEX/POSEIDON altimeter data covering 9 years showed
that the quasiperiodic variation period was not persistent and modulated twice, with a ∼110-day period from mid-1993 to late
1996, a ∼150-day period from late 1996 to mid-1999, and a ∼110-day period from mid-1999 to late 2001. The quasiperiodic variations
of the Kuroshio path migration were contemporaneous with the quasiperiodic arrivals of mesoscale eddies from the east along
27–32°N over the same ∼110- and ∼150-day period quasiperiodic variations. The periodic arrivals of the eddies configure the
periodic variations of the Kuroshio path and its inter-annual modulation. 相似文献
9.
Ana Luisa Rosa Yutaka Isoda Kazuyuki Uehara Tomokazu Aiki 《Journal of Oceanography》2007,63(4):573-588
Hydrographic data and composite current velocity data (ADCP and GEK) were used to examine the seasonal variations of upper-ocean
flow in the southern sea area of Hokkaido, which includes the “off-Doto” and “Hidaka Bay” areas separated by Cape Erimo. During
the heating season (April–September), the outflow of the Tsugaru Warm Current (TWC) from the Tsugaru Strait first extends
north-eastward, and then one branch of TWC turns to the west along the shelf slope after it approaches the Hidaka Shelf. The
main flow of TWC evolves continuously, extending eastward as far as the area off Cape Erimo. In the late cooling season (January–March),
part of the Oyashio enters Hidaka Bay along the shallower part of the shelf slope through the area off Cape Erimo, replacing
almost all of the TWC water, and hence the TWC devolves. It is suggested that the bottom-controlled barotropic flow of the
Oyashio, which may be caused by the small density difference between the Oyashio and the TWC waters and the southward migration
of main front of TWC, permits the Oyashio water to intrude along the Hidaka shelf slope. 相似文献
10.
S. F. Dotsenko 《Physical Oceanography》2006,16(2):77-88
Within the framework of a linear model of long waves in a two-layer ocean, we obtain the analytic solution of the problem
of evolution of an axially symmetric initial displacement of the jump of density. In the process of adaptation of the fields,
internal waves in the form of a decaying (in time) wave packet are emitted from the zone of initial perturbation. These waves
are quasiinertial and their dispersion is conditioned by Earth’s rotation. We study the time evolution of the wave packet
and the dependence of its characteristics on the width of the zone of initial perturbation and the depth of the jump of density.
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Translated from Morskoi Gidrofizicheskii Zhurnal, No. 2, pp. 12–23, March–April, 2006. 相似文献
11.
Coupled modeling of currents and wind waves in the Kerch Strait 总被引：1，自引：0，他引：1
We present a numerical model of the dynamics of the Kerch Strait allowing one to perform the coordinated analysis of the fields
of currents and wind waves. The model includes the spectral wave module and the hydrodynamic block of currents. The influence
of waves on the currents is taken into account in the hydrodynamic block both via the surface and bottom tangential stresses
and via the radiation stresses. In order to take into account the inverse influence of currents upon the waves, we use the
fields of currents and sea level from the hydrodynamic block in the wave module. The specific features of the structure of
currents and wind waves in the strait are studied for the typical wave situations. The results of the coupled and separate
simulation are compared and the importance of taking into account the mechanisms of interaction between waves and currents
in the analysis of the dynamic processes in the strait is demonstrated.
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Translated from Morskoi Gidrofizicheskii Zhurnal, No. 5, pp. 3–20, September–October, 2007. 相似文献
12.
Kazuyuki Uehara Shin-Ichi Ito Hideo Miyake Ichiro Yasuda Yugo Shimizu Tomowo Watanabe 《Journal of Oceanography》2004,60(2):397-409
During November 2000–June 2002, both direct current measurements from deployment of a line of five moorings and repeated CTD
observations were conducted along the Oyashio Intensive observation line off Cape Erimo (OICE). All the moorings were installed
above the inshore-side slope of the Kuril-Kamchatka Trench. Before calculating the absolute volume transports, we compared
vertical velocity differences of relative geostrophic velocities with those of the measured velocities. Since both the vertical
velocity differences concerned with the middle three moorings were in good agreement, the flows above the continental slope
are considered to be in thermal wind balance. We therefore used the current meter data of these three moorings, selected among
all five moorings, to estimate the absolute volume transports of the Oyashio referred to the current meter data. As a result,
we estimated that the southwestward absolute volume transports in 0–1000 db are 0.5–12.8 × 106 m3/sec and the largest transport is obtained in winter, January 2001. The Oyashio absolute transports in January 2001, crossing
the OICE between 42°N and 41°15′ N from the surface to near the bottom above the continental slope, is estimated to be at
least 31 × 106 m3/sec.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
13.
We perform the analysis of the time spectra of four tsunamis generated in the Black Sea by the earthquakes of 26.07.1927,
11.09.1927, 26.12.1939, and 12.07.1966. For the analysis of the spectra, we used digitized marigrams obtained for 12 points
of the Black-Sea coast. The obtained spectra are, as a rule, multimode and have 1–4 spectral maxima. One maximum corresponds
to the periods typical of tsunami waves and the other maxima correspond to the oscillations of the sea level with lower frequencies.
It seems likely that the events of tsunami are accompanied by low-frequency oscillations of the level caused by the atmospheric
forcing, seiches, or other factors. In numerous cases, the oscillations from the predominant energy range lie outside the
characteristic range of periods of the tsunami waves.
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Translated from Morskoi Gidrofizicheskii Zhurnal, No. 5, pp. 21–30, September–October, 2007. 相似文献
14.
S. F. Dotsenko 《Physical Oceanography》2005,15(4):211-219
Within the framework of the nonlinear theory of long waves, we perform the numerical analysis of the one-dimensional run-up
of solitary tsunami waves upon a plane sloping coast. We study the dependences of the run-up heights on the parameters of
waves at the entrance of the shelf zone and on the slope of the coast. The run-up heights of tsunami waves are estimated for
the bottom topography typical of the south coast of the Crimean Peninsula.
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Translated from Morskoi Gidrofizicheskii Zhurnal, No. 4, pp. 11–18, July–August, 2005. 相似文献
15.
A. T. Jones J. M. Kennard G. A. Logan E. Grosjean J. Marshall 《Geo-Marine Letters》2009,29(4):233-248
Multibeam swath bathymetric data collected in 95–120 m water depth on Australia’s North West Shelf revealed two distinct populations
of sand waves: a laterally extensive, low-amplitude composite form comprising superimposed dunes and ripples, and a laterally
restricted form which has unusually high bedform heights and slopes. These large subaqueous sand waves comprise bioclastic
ooid/peloid sand. Significantly, evidence of seabed fluid flow was detected in association with the high-amplitude sand waves.
This evidence includes seabed pockmarks approximately 2–15 m in diameter imaged with side-scan sonar, tubular and massive
carbonate concretions dredged from the seabed, and potential active venting of a fluid plume from the seabed observed during
an underwater camera tow. Molecular and isotopic analyses of carbonate concretions collected from within pockmarks associated
with the high-amplitude sand waves indicate that the fluids from which they precipitated comprise modern seawater and are
not related to thermogenic fluids or microbial gases. The fluid flow is interpreted to be driven by macrotidal currents flowing
over the relatively steep slopes of the high-amplitude sand waves. Pockmarks and carbonate concretions then develop where
the interstitial flows are confined and focused by subsurface ‘mounds’ in a shallow seismic reflector. 相似文献
16.
The structure of the reproductive gathering of beluga whales (RG) was studied near Cape Beluzhii in the Solovetsky Islands
in the White Sea by the photo identification of individuals in 2007–2008; in addition, the peculiarities of the seasonal and
interseasonal dynamics of the RG incomings were analyzed. The gathering is formed by predominantly females and calves of different
ages, which visit the RG area as stable “family” groups. About 15% of the observed females come to Beluzhii Cape every year
and stay there during the whole summer season; thus, forming the regular part of the RG. The other animals come there for
a certain time period, which is probably preconditioned by their physiological readiness for coupling and procreation for
some of the females. When comparing our data with the catalogue of the visually registered beluga whales’ markers (1996–2008),
we found that most of the identified animals of the Solovetsky RG appear here during one summer season or even with an off
period of several years despite the significantly regular findings of most of them for this area. We conclude this may be
linked with the natural changes of the individual markers due both to the shedding and the sexual cycle in the mature animals.
Our data allow concluding that the total population of the Solovetsky PG is higher than was reported before using the visual
supervision methods. 相似文献
17.
Geoacoustic and physical properties of carbonate sediments of the Lower Florida Keys 总被引：4，自引：0，他引：4
Near-surface sediment geoacoustic and physical properties were measured from a variety of unconsolidated carbonate sediments
in the Lower Florida Keys. Surficial values of compressional and shear speed correlate with sediment physical properties and
near-surface acoustic reflectivity. Highest speeds (shear 125–150 m s-1; compressional 1670–1725 m s-1) are from sandy sediments near Rebecca Shoal and lowest speeds (shear 40–65 m s-1; compressional 1520–1570 m s-1) are found in soft, silty sediments which collect in sediment ponds in the Southeast Channel of the Dry Tortugas. High compressional
wave attenuation is attributed to scattering of acoustic waves from heterogeneity caused by accumulation of abundant shell
material and other impedance discontinuities rather than high intrinsic attenuation. Compared to siliciclastic sediments,
carbonate sediment shear wave speed is high for comparable values of sediment physical properties. Sediment fabric, rather
than changes due to the effects of biogeochemical processes, is responsible for these differences. 相似文献
18.
We study the space and time variations of the concentration of chlorophyll in the Black-Sea coastal zone (near Katsiveli)
in summer 2001–2002. Typical vertical profiles of the pigments are presented. The relations between the concentration of chlorophyll
and the optical parameters of seawater (including the Secchi depth, sea reflectance, effective wavelength of the upwelling
radiation, and the vertical attenuation coefficient of light) are analyzed. The equations for the biological parameters of
seawater and its optical characteristics are presented.
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Translated from Morskoi Gidrofizicheskii Zhurnal, No. 3, pp. 36–51, May–June, 2006. 相似文献
19.
20.
We study the problem of subsatellite calibration of a side-looking radar (SLR) of the Sich-1M satellite regarded as an instrument for the evaluation of the velocity of surface wind and discuss the possibility of application
of the meteorological and wave parameters measured from the stationary oceanographic platform of the Experimental Department
of the Marine Hydrophysical Institute (Ukrainian Academy of Sciences) for their evaluation in the remote regions of the sea.
These regions can be observed with the help of the SLR without errors introduced by the appearance of the coast in elements
of space resolution. To prove the indicated possibility experimentally, we perform simultaneous measurements of the water
and air temperatures, wind velocity, and the characteristics of waves both from the platform and in the water area neighboring
with the platform on the side of the sea at distances of up to 4.8 km. The quantitative estimates of the degree of space uniformity
of the analyzed parameters are deduced under the conditions of stable inshore wind. A conclusion is made that the platform
can be used for subsatellite measurements aimed at the validation and improvement of the algorithm of reconstruction of the
velocity of surface wind by using the SLR of the Sich-1M satellite.
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Translated from Morskoi Gidrofizicheskii Zhurnal, No. 3, pp. 31–43, May–June, 2005. 相似文献