Prediction of hydrological phenomena using self-organizing mathematical models   总被引：1，自引：0，他引：1  

E. F. Vasechkina  I. E. Timchenko  V. D. Yarin 《Physical Oceanography》1997,8(3):185-193

The paper considers the application of self-organizing models, specifically, the method of grouped arguments consideration (MGAC), to forecast short and non-stationary time series of observations in the ocean. A sequence of operations for the treatment of observational series is suggested. To assess its efficiency, we have used mean monthly oxygen concentration data collected in the surface and near-bottom layers of the Taganrog Bay. It is shown that the application of the MGAC model allows one to reduce by two times the root-mean-square error of that of the series prediction by five points, in comparison with the Jenkins-Box regressional model. It has been concluded that the predictors' non-linear functions may be effectively used in the treatment of short samplings. Translated by Vladimir A. Puchkin.  相似文献   

Numerical modelling of the Sea of Azov's dynamics resulting from narrowing of the mouth of Taganrog Bay     

F. A. Surkov  L. A. Krukier  G. V. Muratova 《Physical Oceanography》1990,1(6):551-559

The currents and surface level oscillations in the Sea of Azov ensuing from contraction of the mouth of Taganrog Bay are computed using the grid technique on the basis of a numerical solution to the system of quasi-linear, degenerate, parabolic, partial derivative equations (shallow-water equations). It is demonstrated what changes are to be expected in the dynamics of the Sea of Azov should this project be realized. The computations were carried out for typical wind directions.Translated by Vladimir A. Puchkin.  相似文献   

Continent of origin of Atlantic salmon (Salmo salar L.) at West Greenland     

Reddin  D. G.; Stansbury  D. E.; Short  P. B. 《ICES Journal of Marine Science》1988,44(2):180-188

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Stimulation of Marine Productivity with Waste Heat and Mechanical Power     

Isaacs  John D.; Schmitt  Walter R. 《ICES Journal of Marine Science》1969,33(1):20-29

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The rise of coastal and marine tourism     

Marc L. Miller 《Ocean & Coastal Management》1993,20(3)

Marine tourism has surfaced as a pressing topic in the field of ocean and coastal management. Neither necessarily good, nor bad, this tourism is inherently controversial. Today, demand for travel exhibits greater variation and magnitude than ever in history. In response, the tourism industry has become the largest business on earth. This, coupled with the respect people profess for marine environments and local peoples, creates feelings of ambivalence for the tourist. Sociologically, the activity of tourism may be studied as a symbolic interaction fostering social solidarity. Ecotourism, a recent phenomenon attuned to the ideal of sustainable development, is suggested to emerge through the social construction processes of restoration and enhancement. The papers in this theme volume add fuel to the proposition that the resolution of tourism problems in the coastal zone will require the scientific study of environmental and social conditions, policy analyses, planning, and public education.  相似文献   

Phosphate adsorption and desorption in a tropical estuary (Maracaibo system)     

D. López-Hernández  T. Herrera  F. Rotondo 《Marine environmental research》1980,4(2):153-163

The Maracaibo Estuary is of particular interest because of its location in the tropics, its large size (over 12,000 km²), the economic importance of its underlying hydrocarbon deposits and its increasing rate of pollution. Sediments from this estuary were studied in order to characterise their capacity to adsorb and desorb phosphorus. Considerable variability in capacity for phosphate sorption was found among the seventeen samples studied. This variability can be attributed first to the differences among the samples in total P content and, secondly, to their differences in free iron content. Also, it appears that P retention contributes to the control of P concentration in the water and therefore the sediments serve as a buffer in controlling P eutrophication in the estuary.  相似文献   

Food and feeding ecology of juvenile albacore, Thunnus alalunga, off the Bay of Biscay: a case study     

Pusineri  C.; Vasseur  Y.; Hassani  S.; Meynier  L.; Spitz  J.; Ridoux  V. 《ICES Journal of Marine Science》2005,62(1):116-122

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The emerging role of climate in post-smolt growth of Atlantic salmon   总被引：1，自引：1，他引：1  

Friedland  Kevin D.; Chaput  Gerald; MacLean  Julian C. 《ICES Journal of Marine Science》2005,62(7):1338-1349

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The seasonal dynamics of six species of Dorvilleidae (Polychaeta) in the harbour of La Spezia (Italy)   总被引：1，自引：0，他引：1  

D. Prevedelli  G. Massamba N'Siala  & R. Simonini 《Marine Ecology》2005,26(3-4):286-293

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Preservation conditions and the use of sediment pigments as a tool for recent ecological reconstruction in four Northern European estuaries   总被引：4，自引：0，他引：4  

N. Reuss  D.J. Conley  T.S. Bianchi 《Marine Chemistry》2005,95(3-4):283-302

Down-core sediment pigment concentrations from four Northern European estuaries were measured using high-performance liquid chromatography (HPLC) to investigate phytoplankton community structure and preservation conditions over the last ca. 100 years where all sites have experienced different levels of eutrophication. Phytoplankton pigments have been shown to be useful biomarkers for phytoplankton community structure and abundance due to their taxonomic specificity. The pigment concentrations and sediment pigment inventory showed large variation between the four sites. Concentrations ranged from more than 6000 nmol/g OC to less than 100 nmol/g OC and the inventory integrated over the top 10 cm from more than 300 nmol/cm² to less than 30 nmol/cm² for total identified pigments. Good pigment preservation in Mariager Fjord (Denmark) reflected the almost permanently anoxic conditions. Pigments in Laajalahti (Finland) showed peak concentrations around the time of highest nitrogen loading events known from historical and modelled records over the past 100 years. In contrast, poor down-core preservation of pigments (especially carotenoids) was observed in the Ems-Dollard (The Netherlands) and Himmerfjärden (Sweden) estuaries. The Ems-Dollard site is an intertidal mudflat that experiences daily exposure to light and air, which enhances pigment degradation. In Himmerfjärden, resuspension is an important process affecting both the sedimentation rate and degradation properties. The different preservation conditions at the four sites were supported by the differences in two degradation indicators; the ratio of pheopigment-a to chlorophyll-a and total carotenoids to total pigments. Class-specific carotenoid pigments represented the dominant algal groups reported from each site, however, no distinct down-core changes in the pigment composition were observed at any of the four sites. This indicated that changes in plankton community structure on the group level have been limited over this time period or masked by low preservation of pigments.  相似文献