The directional radiation of long waves from bottom deformations of finite duration     

S. F. Dotsenko 《Physical Oceanography》1993,4(1):1-8

The process of generation of two-dimensional (2D) wave motions during small elliptical displacements of the bottom which occur for a finite time interval is considered within the framework of the linear theory of long waves in a basin of constant depth. The spatial structure and the amplitudinal and energy characteristics of the emerging directional surface wave are analysed for bottom deformations of a special form.Translated by Mikhail M. Trufanov.  相似文献   

The study of intermittent hydrophysical fields in the vicinity of the frontal zone     

I. D. Bakanov  A. S. Borisov  A. M. Kudin 《Physical Oceanography》1993,4(2):163-168

CTD data provided by the MGI-4204 and MARK-III probes are used to study the quasistationary subpolar front structure in the north-western Sea of Japan. In order to provide further insights into the intermittent scalar hydrophysical fields, the method of inhomogeneity identification using temperature pulsations calculated by the moving interval is suggested. The experimentally-derived inhomogeneity distribution is satisfactorily approximated by the exponential law.Translated by V. Puchkin.  相似文献   

Feeding habits of redfish (Sebastes spp.) and Greenland halibut (Reinhardtius hippoglossoides) in West Greenland waters     

Pedersen  S. A.; Riget  F. 《ICES Journal of Marine Science》1993,50(4):445-459

  相似文献   

Joint Soviet-Turkish expedition in the Black Sea     

A. A. Bezborodov  S. L. Gokchen  V. N. Eremeev  I. T. Konuk  A. K. Saidam  E. M. Tirasin 《Physical Oceanography》1991,2(3):227-231

The hydrological and hydrochemical structures of the upper 300 m water column of the Black Sea in autumn 1988 have been studied. Regularities in the distribution of the physico-chemical characteristics in the zone of interaction between aerobic and anaerobic waters as well as the topography of the H₂S zone boundary and its connection with a certain density gradient have been found.Translated by Mikhail M. Trufanov.  相似文献   

Remote observations of the water circulation in the western Black Sea     

G. A. Grishin  I. G. Makeev  S. V. Motyzhev 《Physical Oceanography》1991,2(2):145-155

  相似文献   

Digital preprocessing techniques for GLORIA II sonar images     

Richard L. Miller  Fa S. Dwan  Chiu-Fu Cheng 《Geo-Marine Letters》1991,11(1):23-31

Image processing techniques are discussed that correct distortions in GLORIA II side scan sonar imagery including water column offset, slant-range distortion, multiple returns, aspect ratio, speckle noise, striping, and cross-track power drop-off. The software operates within NASA's ELAS image processing system and is applied to the original 12-bit GLORIA II data. Procedures are discussed for generating large scale mosaics and three-dimensional overlays with sea floor bathymetry. The results are shown in four sonographs acquired off the southern coast of California.  相似文献   

Announcement     

K. Yagi  S. Akimoto 《Marine Geophysical Researches》1988,9(2):195-195

  相似文献   

Improved form of wind wave frequency spectrum   总被引：5，自引：0，他引：5  

Wen Shengchang 《海洋学报(英文版)》1989,8(4):467-483

The lower frequency part of the theoretical wind wave spectrum proposed by the authors (Wen et al. , 1988a, b,c) has been improved and the form of spectrum is appreciably simplified. In addition to the field data collected in the Bohai Sea region and used in the previous papers, those obtained in the Huanghai Sea, the East China Sea and the South China Sea have been employed so that the improved spectra can be verified on a more extensive observational basis. Computed results agree with the observations well. Further comparisons have been made between the proposed spectra and the JONSWAP spectrum. Though the two types of spectrum are close to each other in form, the former shows, as a whole, better agreement with the observation than the latter. By introducing an improved relation between the peak-ness factor and significant wave steepness, the spectrum contains only significant wave height and period as parameters. For spectra given in this form, the computed peak frequencies coincide approximately wit  相似文献   

Seasonal Variation in the Biomass of Marine Macrophyta from Greek Coasts     

S. Haritonidis    G. Nikolaidis  I. Tsekos 《Marine Ecology》1986,7(4):359-370

Abstract. The marine plant communities of the littoral zone in different biotopes of the Greek coasts were investigated in 1980-81. Seasonal distribution and variation of marine plant biomass were assessed. The communities of Cystoseira crinita and C. compressa were outstanding with maximum biomass during the summer months. Corallina officinalis and Pterocladia capillacea + Viva rigida communities predominated with maximum biomass in autumn and exhibited a decrease in winter, except in stressed biotopes. The species diversity and productivity of seaweeds along the Greek coasts are interpreted in relation to a number of environmental parameters.  相似文献   

Radioecological studies of activation products released from a nuclear power plant into the marine environment     

Mats Nilsson  Sören Mattsson  Elis Holm 《Marine environmental research》1984,12(3):225-242

The seaweeds Fucus vesiculosus, Fucus serratus, Ascophyllum nodosum and Cladophora glomerata and crustaceans of the Idothea and Gammarus families have proven to be excellent bioindicators for radioactive corrosion products released from a nuclear power plant into the marine environment. These bioindicators have been used to map the spatial and temporal distribution of the released radioactivity. The activity has been followed up to 150 km from the power plant, and the decrease in activity concentration C(z) in the bioindicators with distance z can be expressed by a power function C(z) = α. z^?1·4 where α is a constant.The variation with time of activity concentration very well reflects the amount of activity discharged from the power plant, with surprisingly good resolution in time.The bioindicators exhibit different uptake patterns of the radionuclides detected, and variations from summer to winter for the crustaceans Idothea, when compared to Fucus, has been found.  相似文献