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1

Algorithm for estimating primary production in the Baltic by remote sensing

100%
Wozniak B., Dera J., Semovski S., Hapter M., Ostrowska M., Kaczmarek S.
Oceanological Studies
|
1995
|
issue 68/8
91-123
EN
The possibilities of using remote optical sensing to investigate the photosynthetic characteristics of BAltic basins are analysed, and the general principles of modelling photosynthesis in the sea for remote sensing purposes presented.The algorithm developed by the autors for estimating primary production in oceanic Case 1 Waters (WC1) is discussed.
2

The use of sequential satellite images for the calculating surface velocity vectors in the waters of the Gulf of Gdansk

80%
Zarki I., Krezel A., Zarki I. K. A.
|
|
issue 3-4
35-44
EN
The Maximum Cross Correlation method (MCC) modified with divergence checking was used to calculate the surface velocity field in the Gulf of Gdansk. The brightness temperature in channel 4 of the AVHRR taken 10 times between 6 and 9 August 1996 served as input data. The surface velocity vector distribution obtained with the use of MCC are compared with the results of a 3D hydrodynamic model and field observation of a drifting rhodamine spill during the POLRODEX?96 experiment
3

Mutlispectral satelite data assimilation in bio-optical models of plankton dynamics

80%
Semkovsky S., Wozniak B., Pelevin V.
Oceanological Studies
|
1995
|
issue 68/8
125-147
EN
Multispectral scanners on board satellite produce data available for estimating surface concentrations of chlorophyll pigments and other substances in sea watera.Assimilation of the information in models of plankton dynamics is necessary for understanding the vertical structure of primary production, calculation of integral characteristics, for as well as interpolation and forecasts.The algorithms for determining chlorophyll and other substances in seawater by multispectral observations are discussed.A number of assimilation procedures of such data are presented both as simple statistical models as models using a fundamental relationship between hydrophysics, plankton dynamics and hydrooptical processes.Models of the vertical distribution of chlorophyll pigment concentration and three-dimensionall models of population dynamics are discussed.
4

A preliminary study of the spectral characteristics of the upward radiance field in the surface layer of the Baltic.An empirical algorithm for the remote detection of chlorophyll concentration

80%
Darecki M., Olszewski J., Kowalczuk P.
Oceanological Studies
|
1995
|
issue 68/8
27-49
EN
The first results of experimental research into relations between the diffuse reflectance spectra of seawater and the concentrations of chlorophyll and total suspended mater in the surface layer are presented.The results allowed the preliminary classification of these waters into two basic groups, which differ from each other in the maximum reflectance and in the concentration ranges of total suspended matter.Each of the basic groups can be divided into two sub-groups, differing in the shape of the reflectance spectrum (defining the water colour), chlorophyll concentration and the level of correlation between concentrations of chloriophyll and total suspended matter.On the basis of above data a local algorithm for the radiometric estimation of chlorophyll content in the surface layer of the BAltic is also developed and presentes.
5

On the usefulness of NOAA-AVHRR satelite data for estimating the component content in Baltic Sea water

80%
Oleszewski J., Kowalczuk P., Darecki M.
Oceanological Studies
|
1995
|
issue 68/8
51-60
EN
The hypothetical response of the visible channel of the NOAA satelite detectors is discussed in order to discover to what extend the content of Baltic water can be distinguished.The experimental data from the spring of 1993 shows that, the applicability of the detector has been proven only in the direct evaluation of total suspended matter (TSM) concentration.The limitation ranges of TSM concentration for good and poor AVHRR detection are given.The results are illustrated with some AVHRR images, processed into the spatial distribution of total suspended in the Baltic's surface layer.
6

Chlorophyll a content in the surface layer of the Gulf of Gdansk in the AVHRR images

80%
Krezel A., Latala A.
|
EN
The satellite data in red and near infrared light (1st and 2nd channels of AVHRR) were processed and compared with chlorophyll a concentration in the surface layer of the Gulf of Gdansk. Taking into account Stumpf and Tyler (1988) proposal, quantitative relation between this concentration and the value of Cij=R2/R1 (where R2 and R1 denotes reflectance coefficients in AVHRR's channel 1 and 2 respectively) has been calculated.
7

The reflection of light from serawater polluted with thin non-homogenous oil layer:theoretical dependence on wavelength, thickness and angle of incidence

80%
Otremba Z.
Oceanological Studies
|
1994
|
issue 66/7
137-148
EN
The paper contains the results of computation of the spectral-directional coefficient of light reflection from aseawater polluted with the thin oil layer. A multilayer model of oil contaminated surface was used to work out the computation algorithm. The results are shown as grephs of function of wavelength, thickness and angle of incidence. Apart from presenting the possibilities of the program packet, a few general conclusions are formulated.
8

An instrument for measuring the spectral distribution of upward radiance above the sea

80%
Olszewski R., Darecki M., Sokolski M.
Oceanological Studies
|
1995
|
issue 68/8
15-25
EN
The paper presents a prototype instrument for simultaneous measurements of upweling radiance and downweling irradiance over the sea surface in seven spectral channels.The utility of this instrument in its major applications has been shown.(i) in contactless investigations of sea water components, and (ii) in the calibration and validation of remote sensing data.The paper also presents the technical specifications of the instrument, ita operationg principles and results if field data.
9

Semi-empirical modelling of backscatering anf light reflection coefficients in WC1 seas

61%
Wozniak B., Smekot-Wensierski W., Darecki M.
Oceanological Studies
|
1995
|
issue 68/8
61-90
EN
The paper reports on the semi-empirically modelled dependences of the backscattering coefficient and the irradiance and radiation reflection coefficients on the chlorophyl concetration Ca in WC1-type waters.
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