Temat: ocean water - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Ship seakeeping in UKC determination – a further study on wave force transfer functions
Autorzy:: Artyszuk, J.
Powiązania:: https://bibliotekanauki.pl/articles/359064.pdf
Data publikacji:: 2012
Wydawca:: Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:: ship seakeeping
ocean wave
shallow water
motion dynamics
Opis:: Modeling of ship motions in waves concentrates in most applications on the response amplitude operator (RAO). This mathematically not demanding method of analysis is very attractive, but loses some essential information in certain situations. The objective of present contribution is to establish and investigate preliminary foundations for a seakeeping model as optimal for under keel clearance (UKC) estimation. A special attention was devoted to transients of motions, stationary harmonic motions, coupling between degrees of freedom, and the wave force transfer functions – all in the aspect of shallow water environment.
Źródło:: Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2012, 32 (104) z. 2; 5-15
1733-8670
2392-0378
Pojawia się w:: Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Basis of high-pressure water jet implementation for poly-metallic concretions output from the oceans bottom
Podstawy stosowania wysokociśnieniowej strugi wodnej do wydobywania konkrecji polimetalicznych z dna oceanicznego
Autorzy:: Borkowski, P.
Borkowski, J.
Powiązania:: https://bibliotekanauki.pl/articles/1819583.pdf
Data publikacji:: 2011
Wydawca:: Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:: dno oceaniczne
konkrecja polimetaliczna
struga wodna
ocean floor
concretion polymetallic
stream water
Opis:: Comprehensive knowledge and modern technique make it possible to reach for different natural resources deposited in water or on oceans bottom or even in stratum below the bottom. World ocean takes over 71% of our globe and considering continuous shrinking of natural resources of raw materials and fuels it becomes nowadays the area of intensive geological exploration. Having in mind the fact that most of typical land resources of useful minerals will last at the very most 50÷200 years, adequate reserves laying down at the bottom of the world sea may give our civilization a chance for several thousand years' development, according to scientist calculations [14]. Taking above into consideration, all seas and oceans shelves were divided into plots and fields. Many shelves are explored nowadays concerning petroleum and natural gas and such output reaching the level of 20% of total production [5]. Basing on different research and exploration it was found that the bottom and under bottom resources of natural minerals are gigantic. Technological development as well as huge investments caused that this XXI century starts new beginning of oceans exploitation [15] and its conquest. Careful investigations especially of deep resources exploration still is future matter. However nowadays there are rich useful minerals areas deposited at the bottom in the form of poly-metallic concretions. These are o res in the form of nodules including metals e.g.: manganese, cobalt, copper, iron and nickel. Among six different areas rich in concretions, the most perspective one is Clarion-Clipperton where such minerals concentration exceeds 10 kg/m2 [9]. This area region is located at Pacific in equatorial zone including undersea bottom leap down at the level range of 4200 to 5200 m [12]. Since 1992 Poland as so called investing pioneer (representing international organization Interocenametal) has the right to explore plot in the range of mentioned Clarion-Clipperton region of area of 150.000 km2 [7]. This paper presents basis of unconventional technology of poly-metallic concretions output by application of high-pressure cavitation water jet [1] with addition of dry ice particles CO2 as a medium helpful for material loosening form the ground. Such ice particle resistance to hygroscopicity causes that it doesn't have tendencies for lumping and therefore it may keep predicted ability for sublimation. Adequate intensity of this phenomenon [3, 4] in conditions analogical to those existing down at the sea bottom proceeds in a long time [7]. Considering above the gas form of CO2 may cause proper draught of water flow in elastic transportation pipeline. In turn for vertical transport intensification there is need to use additional air injector.
W pracy scharakteryzowano konkrecje polimetaliczne zalegające dno oceaniczne oraz ich zasoby i miejsca występowania, zwłaszcza w przyznanym Polsce obszarze pomiędzy uskokami dna pacyficznego o nazwie Clarion-Clipperton. Przeanalizowano metody ich wydobywania w obszarze głębokomorskim a zwłaszcza hydraulicznego transportu urobku z dna oceanu na pokład statku górniczego. Przeanalizowano możliwość zastosowania wysokociśnieniowej strugi wodnej wspomaganej fizycznym oddziaływaniem cząstek suchego lodu CO2. Wskazano na bardzo przydatne cechy tego lodu, dzięki którym jego cząstki nie podlegają zbrylaniu natomiast sublimują w strefie urobku. Powstające duże ilości gazowej fazy CO2 zwiększają dynamikę pionowego przepływu płynu w przewodzie rurowym, co zwiększa skuteczność transportu urobku na powierzchnię. Jednak dla zapewnienia odpowiedniej wydajności pionowego transportu konkrecji polimetalicznych należy na określonej głębokości wtłaczać do rury sprężone powietrze. Przedstawiono w nim podstawy transportu metodą iniekcja pneumatycznej opracowane dla optymalnego wydobywania konkrecji polimetalicznych. Przeanalizowano struktury przepływów występujących w różnych przekrojach rury transportowej oraz określono ich teoretyczne zależności. Opracowano również wzory pozwalające na dokonywanie wyboru najważniejszych parametrów decydujących o skuteczności tej metody.
Źródło:: Rocznik Ochrona Środowiska; 2011, Tom 13; 65-82
1506-218X
Pojawia się w:: Rocznik Ochrona Środowiska
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Estimation of diatom and dinoflagellate cell volumes from surface waters of the Northern Indian Ocean
Autorzy:: Chitari, R.R.
Anil, A.C.
Powiązania:: https://bibliotekanauki.pl/articles/47851.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: diatom
dinoflagellate
cell size
surface water
microphytoplankton
seasonal variation
spatial variation
Indian Ocean
Bengal Bay
Arabian Sea
Opis:: Phytoplankton samples collected from the Northern Indian Ocean (Bay of Bengal, northern Arabian Sea, and Dona Paula Bay Goa, west coast of India), were utilized to quantify changes in cell size, cell volume and carbon per cell of diatoms and dinoflagellates. The dataset from the Bay of Bengal also provides inter- and intra-annual variations (April 2008 to March 2010). The variations in cell size and volume were large in regions influenced by the riverine influx or terrigenous inputs. An interregional comparison of commonly available forms (8 species) points out that cell volumes are highest in the North Atlantic and lowest in the Mediterranean. The information provided will be useful in estimation of carbon biomass and biogeochemical studies.
Źródło:: Oceanologia; 2017, 59, 3
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Ocean acidification and marine microorganisms: responses and consequences
Autorzy:: Das, S.
Mangwani, N.
Powiązania:: https://bibliotekanauki.pl/articles/49020.pdf
Data publikacji:: 2015
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: acidification
ocean
water microorganism
climate change
ecosystem
marine environment
primary production
trace gas
nitrogen fixation
community composition
organic matter
enzyme activity
Źródło:: Oceanologia; 2015, 57, 4
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Temporal and spatial changes in the bio-optical properties of seawater in the Nordic Seas – AREX’2003 and 2006
Autorzy:: Drozdowska, V.
Paryvkina, L.
Powiązania:: https://bibliotekanauki.pl/articles/47895.pdf
Data publikacji:: 2011
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: Atlantic water
bio-optical property
chlorophyll
fluorescence
Nordic Sea
ocean circulation
organic matter
oxygen
phytoplankton
sea water
shelf water
spatial change
Svalbard Islands
temporal change
water mass
Opis:: For many years the Nordic Seas have been the subject of research into ocean circulation carried out by the Institute of Oceanology PAS, especially the inflow of Atlantic water and the intensive turbulent mixing of these waters with Arctic and shelf waters. Ocean currents affect various biological processes, among them the supply of organic matter and oxygen, which constitute the foundation for the unique flora and fauna of the Svalbard islands. Spectrophotometric examinations of surface waters using an M32 B spectroflu- orophotometer (LDI Ltd.) were carried out repeatedly during Arctic cruises on board r/v ‘Oceania’. The results presented in this paper come from the AREX campaigns of 2003 and 2006. Analysis of the chlorophyll a fluorescence excitation spectra recorded shows an increase in phytoplankton abundance and the changes in the spatial distribution of the phytoplankton species characteristic of Atlantic, Arctic and shelf waters. The spatial patterns of the phytoplankton pigments and their abundance were compared with the physical characteristics of water masses. The analysis confirmed that phytoplankton species move together with the Atlantic water as this flows into northern latitudes.
Źródło:: Oceanologia; 2011, 53, 3
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Tracing the signature of various frontal systems in stable isotopes (oxygen and carbon) of the planktonic foraminiferal species Globigerina bulloides in the Southern Ocean (Indian Sector)
Autorzy:: Khare, N.
Chaturvedi, S.K.
Powiązania:: https://bibliotekanauki.pl/articles/48922.pdf
Data publikacji:: 2012
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: Foraminifera
Globigerina bulloides
stable isotope
frontal system
oxygen
carbon
foraminiferal species
water mass
Southern Ocean
Opis:: Twenty-five surficial sediment samples, collected on board ORV Sagar Kanya during her 199th and 200th cruises along a north-south transect between latitudes 9.69◦N and 55.01◦S, and longitudes 80◦E and 40◦ E were studied for isotopic variations (values of δ18O and δ13C) of the indicator planktonic species Globigerina bulloides. The results indicate that from latitudes 9.69◦N to 15◦ S both these isotopes (δ18O and δ13C) fluctuated significantly. Between latitudes from around 15◦S to 30–35◦S δ18O values steadily increased, whereas δ13C showed a decreasing trend. However, to the south of latitudes 30–35◦S, both isotope values showed a similar response with a gradual increase up to latitude 50◦S, beyond which δ18O continued to increase while δ13C declined. The characteristic patterns of the values of both isotopes indicates that the signatures of different water masses are associated with various frontal systems and/or water masses across the transect. The signature of the Polar Front at around latitude 50◦S shows the specific response of the isotopic values (δ18O and δ13C) of G. bulloides. Such a response beyond 50◦S latitude is ascribable to the general decrease in the ambient temperature, resulting in a continuous increase in δ18O values, while δ13C values decrease as a result of reduced photosynthesis in regions approaching higher latitudes owing to low light penetration. To further corroborate our results, those of many such transects from geographically distinct regions need to be studied for isotopic variations in the calcareous shells of planktonic foraminiferal species. The results have the potential to be used as a proxy to assess the movement of frontal systems in southern high latitude regions.
Źródło:: Oceanologia; 2012, 54, 2
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Orientirovochnye prognozy kharakteristic skorosti vetra v Evrope s uchetom izmenchivosti raspredelenija poverkhnostnykh temperatur Severnojj Atlantiki na primere Severnogo Prichernomorja
Projections of wind speed characteristics in Europe with the accounting apportionment superficial temperatures in North Atlantic an example of Black Sea
Autorzy:: Kholopcev, A.
Akcenova, A.
Powiązania:: https://bibliotekanauki.pl/articles/76861.pdf
Data publikacji:: 2013
Wydawca:: Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:: forecasting
wind speed
temperature
surface water
North Atlantic Ocean
Black Sea
multiple regression model
correlation
identification
Opis:: On the example of the Northern Black Sea Coast representative items shown that allowance for the identification of predictive multiple-regression models of the interannual variability of SST anomalies identified variations in the North Atlantic waters, enables efficient evaluation of monthly mean values of wind speed with a lead time of at least 3 years.
Źródło:: Motrol. Motoryzacja i Energetyka Rolnictwa; 2013, 15, 5
1730-8658
Pojawia się w:: Motrol. Motoryzacja i Energetyka Rolnictwa
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Decadal fluctuations in North Atlantic water inflow in the North Sea between 1958-2003: impacts on temperature and phytoplankton populations
Autorzy:: Leterme, S.C.
Pingree, R.D.
Skogen, M.D.
Seuront, L.
Reid, P.C.
Attrill, M.J.
Powiązania:: https://bibliotekanauki.pl/articles/48966.pdf
Data publikacji:: 2008
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: phytoplankton
continental slope
ocean circulation
plankton
Atlantic water
plankton community
climate
temperature
dynamics
fluctuation
pelagic ecosystem
North Sea
circulation
population
sea surface temperature
Opis:: The circulation of Atlantic water along the European continental slope, in particular the inflow into the North Sea, influences North Sea water characteristics with consequent changes in the environment affecting plankton community dynamics. The long-term effect of fluctuating oceanographic conditions on the North Sea pelagic ecosystem is assessed. It is shown that (i) there are similar regime shifts in the inflow through the northern North Sea and in Sea Surface Temperature, (ii) long-term phytoplankton trends are influenced by the inflow only in some North Sea regions, and (iii) the spatial variability in chemicophysical and biological parameters highlight the influence of smaller scale processes.
Źródło:: Oceanologia; 2008, 50, 1; 59-72
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Mathematical description of vertical algal accessory pigment distributions in oceans – a brief presentation
Autorzy:: Majchrowski, R.
Ostrowska, M.
Powiązania:: https://bibliotekanauki.pl/articles/49083.pdf
Data publikacji:: 2009
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: accessory pigment
bio-optical modelling
chlorophyll a
concentration
investigation
marine alga
mathematical description
ocean
optical depth
photoprotecting pigment
photosynthetic apparatus
photosynthetic pigment
pigment
sea
trophic index
vertical distribution
water
Opis:: A straightforward mathematical expression for describing the vertical distributions of algal accessory pigments in oceans is presented. To this end ca 1500 empirical datasets of accessory pigment depth profiles gathered during some 200 research cruises in different oceanic regions were analysed. These data were retrieved from the bio-optical databases of SeaBASS and U.S. JGOFS published on the Internet. The statistical relationships were analysed between the concentrations of accessory pigments and the trophic indices of waters, as measured by the surface concentrations of chlorophyll a and the optical depths in different oceanic regions. A mathematical expression was established and formulas based on it were found, approximating the relations between the vertical distributions of accessory pigments and the chlorophyll a concentration. These formulas can be used to model the species composition of algae in different parts of the ocean and in remote sensing algorithms.
Źródło:: Oceanologia; 2009, 51, 4
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: On the geometry of ocean surface waves
Autorzy:: Massel, S.R.
Powiązania:: https://bibliotekanauki.pl/articles/48766.pdf
Data publikacji:: 2011
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: air-sea interaction
atmosphere-ocean interaction
deep water
dynamic factor
geometry
irregular wave
marine environment
ocean surface
regular wave
shallow water
surface wave
water motion
wave breaking
wave slope
Opis:: The factors influencing the atmosphere-ocean transfer of mass and momentum, as well as incipient wave breaking and the amount of energy dissipated due to breaking, are discussed in detail. In particular, the influence of directional spreading on the statistics of surface wave slopes and the area of the wind- roughened ocean surface is demonstrated. Theoretical analysis and comparison with the available experimental data show that unimodal directional spreading is not able to reproduce the observed ratio of the cross-wind/up-wind mean square slopes. Better agreement is achieved when bimodal directional spreading, consisting of two wrapped-Gaussian distributions, is applied. The bimodal form suggested by Ewans (1998) is used in the paper. Moreover, the formulae developed here show that the increase in the area due to surface waves is rather small for both regular and irregular waves.
Źródło:: Oceanologia; 2011, 53, 2
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Surface waves in deep and shallow waters
Autorzy:: Massel, S.R.
Powiązania:: https://bibliotekanauki.pl/articles/48826.pdf
Data publikacji:: 2010
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: surface wave
deep
shallow water
dynamic factor
marine environment
atmosphere-ocean interaction
ocean form
air-sea interface
hydrodynamics
Opis:: The motion of water due to surface waves is the most dynamic factor observed in the marine environment. In this review various aspects of the wave modelling of non-linear, steep surface waves and their role in the atmosphere-ocean interaction are discussed. Significant improvements in wave forecasting have been made in the last ten years. This is to a large extent related to substantial progress in the description of wind forcing and other processes, as well as to the more efficient use of satellite observations and assimilation methods. One striking observation is the increasing variety and complexity of models in which more physical processes are implemented, greater precision and resolution achieved and extended ranges of applicability demonstrated. However, in order to evaluate the applicability of particular models, comparison with high quality experimental data, collected in nature or under laboratory conditions, is necessary.
Źródło:: Oceanologia; 2010, 52, 1; 5-52
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Quality assessment of atmospheric surface fields over the Baltic Sea from an ensemble of regional climate model simulations with respect to ocean dynamics
Autorzy:: Meier, H.E.M.
Hoglund, A.
Doscher, R.
Andersson, H.
Loptien, U.
Kjellstrom, E.
Powiązania:: https://bibliotekanauki.pl/articles/48250.pdf
Data publikacji:: 2011
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: atmosphere-ocean coupling
Baltic region
climate change
climate model
ecosystem
global warming
hydrographic change
regional climate
regional climate modelling
sea ice
temperature
water temperature
Opis:: Climate model results for the Baltic Sea region from an ensemble of eight simulations using the Rossby Centre Atmosphere model version 3 (RCA3) driven with lateral boundary data from global climate models (GCMs) are compared with results from a downscaled ERA40 simulation and gridded observations from 1980 –2006. The results showed that data from RCA3 scenario simulations should not be used as forcing for Baltic Sea models in climate change impact studies because biases of the control climate significantly affect the simulated changes of future projections. For instance, biases of the sea ice cover in RCA3 in the present climate affect the sensitivity of the model’s response to changing climate due to the ice-albedo feedback. From the large ensemble of available RCA3 scenario simulations two GCMs with good performance in downscaling experiments during the control period 1980–2006 were selected. In this study, only the quality of atmospheric surface fields over the Baltic Sea was chosen as a selection criterion. For the greenhouse gas emission scenario A1B two transient simulations for 1961 –2100 driven by these two GCMs were performed using the regional, fully coupled atmosphere-ice-ocean model RCAO. It was shown that RCAO has the potential to improve the results in downscaling experiments driven by GCMs considerably, because sea surface temperatures and sea ice concentrations are calculated more realistically with RCAO than when RCA3 has been forced with surface boundary data from GCMs. For instance, the seasonal 2 m air temperature cycle is closer to observations in RCAO than in RCA3 downscaling simulations. However, the parameterizations of air-sea fluxes in RCAO need to be improved.
Źródło:: Oceanologia; 2011, 53, (1-TI)
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Tracing palaeocurrents from the Arctic Realm into the Tethys Ocean: the use of glendonite as an indicator for cold bottom water masses
Autorzy:: Merkel, Anna
Munnecke, Alex
Powiązania:: https://bibliotekanauki.pl/articles/24202087.pdf
Data publikacji:: 2023
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:: Tethys
ocean
water
Opis:: Today, the global conveyor belt of ocean currents is controlled by the configuration of continents and the climate. Conversely, ocean currents influence water and air temperatures as well as the amount of rainfall on a regional to local scale. In addition, they govern species distribution patterns, sedimentation patterns and the dispersal of nutrients in both oceans and epeiric seas. Therefore, the reconstruction of palaeocurrents is crucial for the understanding of ancient environments and the past climate. An important driver for the global ocean circulation is the formation of deep water. However, deep-water production is difficult to estimate, and its circulation is difficult to reconstruct, not only today but especially in the geological record. Palaeocurrent reconstructions are often based on the temporal and spatial distribution of marine species. In this presentation, a new approach is proposed which uses the occurrence of glendonites as a proxy for cool bottom currents. Glendonites are pseudomorphs after the hydrous carbonate mineral ikaite (CaCO3·6H2O) which only forms in environments characterised by near-freezing temperatures. Throughout the Phanerozoic, glendonites can be found in successions which were deposited in high latitudes. However, examples of glendonite occurrences in mid-latitudinal sections are also reported. One of these examples are upper Pliensbachian (Lower Jurassic) glendonites from a shallow-marine succession in South Germany which was located in the European epicontinental sea – an area, where it was technically too warm to form the precursor mineral ikaite. Based on petrographical and sedimentological investigations as well as stable isotope analyses it is concluded that a low temperature was the main factor for ikaite formation in the studied section. To explain the low water temperatures, a model for a thermohaline circulation in the European epicontinental sea is proposed. The cool climate in the late Pliensbachian initiated the growth of sea ice in high latitudes, leading to the formation of cold and saline bottom waters analogous to the modern formation of North Atlantic Deep Water (NADW) and Antarctic Bottom Water (AABW). The cold bottom current flowed southward from the Arctic Realm through the Viking Corridor into the European Epicontinental Sea, thereby causing a massive cooling of the deeper parts of the epeiric sea, which led to the formation of ikaite in temperate areas. After passing the shelf, the bottom current entered the Western Tethys, probably forming a deep water mass. The proposed model can help to explain mid-latitudinal glendonite occurrences not only in the Pliensbachian, but also in other areas and time slices which are characterised by cooling. Moreover, it enables the use of the pseudomorph as a tracer for cold bottom currents which can be a helpful tool for the reconstruction of global ocean current patterns.
Źródło:: Geotourism / Geoturystyka; 2023, 1-2 (72-73); 49--49
1731-0830
Pojawia się w:: Geotourism / Geoturystyka
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: Sky glint correction in measurements of upward radiance above the sea surface
Autorzy:: Olszewski, J.
Kowalczuk, P.
Powiązania:: https://bibliotekanauki.pl/articles/48314.pdf
Data publikacji:: 2000
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: marine optics
coastal water
remote sensing
glint reduction
ocean water
sea surface
Opis:: An experiment has been performed to determine the upward water-leaving radiance by non-contact measurement of the total upward and downward radiance above the sea surface from a moving ship. The method for achieving this aim is described: the radiance meters are both tilted in such a way that the upward radiance meter can ‘see’ that part of the measured downward radiance which would be reflected if the water surface were smooth and which is not derived directly from solar glitter. Both meters are firmly fixed in a special frame, which ensures that the required orientation is the most probable one. Time records of the measured parameters are analysed. The results are presented in several forms: frequency (histogram) analysis appears to be the most promising one.
Źródło:: Oceanologia; 2000, 42, 2
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 15.

Tytuł:: Modelling of bio-optical parameters of open ocean waters
Autorzy:: Pelevin, V.N.
Rostovtseva, V.V.
Powiązania:: https://bibliotekanauki.pl/articles/48307.pdf
Data publikacji:: 2001
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: yellow substance
chlorophyll pigment
pigment
suspended matter
bio-optical modelling
ocean water
light absorption
Opis:: An original method for estimating the concentration of chlorophyll pigments, absorption of yellow substance and absorption of suspended matter without pigments and yellow substance in detritus using spectral diffuse attenuation coefficient for downwelling irradiance and irradiance reflectance data has been applied to sea waters of different types in the open ocean (case 1). Using the effective numerical single parameter classification with the water type optical index m as a parameter over the whole range of the open ocean waters, the calculations have been carried out and the light absorption spectra of sea waters tabulated. These spectra are used to optimize the absorption models and thus to estimate the concentrations of the main admixtures in sea water. The value of m can be determined from direct measurements of the downward irradiance attenuation coefficient at 500 nm or calculated from remote sensing data using the regressions given in the article. The sea water composition can then be readily estimated from the tables given for any open ocean area if that one parameter m characterizing the basin is known.
Źródło:: Oceanologia; 2001, 43, 4
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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