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Parameterization of light scattering for solving the inverse problem of determining the concentrations of the principal light scattering and absorbing admixtures in shelf waters

100%

Pelevin V. N., Rostovtseva V. V.

Oceanologia

|

2001

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tom 43

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nr 4

A method for estimating the water backscattering coefficient was put forward on the basis of experimental data of diffuse attenuation coefficient for downwelling irradiance and irradiance reflectance. Calculations were carried out for open sea waters of different types and the spectral dependencies were found (‘anomalous’ spectra) and explained. On this basis, a new model of light backscattering on particles in the sea is proposed. This model may be useful for modelling remote sensing reflectance spectra in order to solve the inverse problems of estimating the concentration of natural admixtures in shelf waters.

2

Acoustic detection of gas bubbles in the sea

84%

Szczucka J.

Oceanologia

|

1990

|

tom 28

3

Non-resonant gas bubbles in sound backscattering and attenuation in the sea

84%

Szczucka J.

Oceanologia

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1991

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tom 31

4

A comparison of ASCAT wind measurements and the HIRLAM model over the Baltic Sea

67%

Sluzenikina J., Mannik A.

Oceanologia

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2011

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tom 53

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nr (1-TI)

This paper presents a comparison of the wind data measured by the ASCAT polar-orbiting satellite scatterometer and winds forecast by the numerical weather prediction model HIRLAM in the Baltic Sea region during the stormy season in 2009. Two different resolution models were used in the comparison. Mutual quality and uncertainty characteristics of the measurements and predictions are determined. The results of the study show that the ASCAT wind data are well correlated with the HIRLAM predicted winds, which raises the credibility of both data sources in operational and hindcasting applications over the Baltic Sea. A case of phase error in a HIRLAM forecast of cyclonic activity over the Baltic Sea is discussed.

5

Revisiting the role of oceanic phase function in remote sensing reflectance

67%

Freda W., Piskozub J.

Oceanologia

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2012

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tom 54

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nr 1

The effect of angular structure differences between measured and best-fit analytical phase functions of the equivalent backscattering ratio on calculated reflectance values was studied and shown to be significant. We used a Monte Carlo radiative transfer code to check the effect of choosing different analytical (several Fournier- Forand (1994) and Henyey-Greenstein (1941)) phase functions with backscattering ratios identical to the ‘classical’ average Petzold function. We show that the additional variability of the resulting water leaving radiance is about 7% (4% between the Fournier-Forand functions themselves) for most scenarios. We also show a previously unknown maximum of the discrepancy (up to 10%) for highly scattering waters. We discuss the importance of relative differences in phase function for different angular ranges to this maximum and to the behaviour of the discrepancy as a function of solar zenith angle.

Ograniczanie wyników

5 Oceanologia

2 Szczucka J.

1 Freda W.

1 Mannik A.

1 Pelevin V. N.

1 Piskozub J.

1 Rostovtseva V. V.

1 Sluzenikina J.

1 2012

1 2011

1 2001

1 1991

1 1990

Parameterization of light scattering for solving the inverse problem of determining the concentrations of the principal light scattering and absorbing admixtures in shelf waters

Acoustic detection of gas bubbles in the sea

Non-resonant gas bubbles in sound backscattering and attenuation in the sea

A comparison of ASCAT wind measurements and the HIRLAM model over the Baltic Sea

Revisiting the role of oceanic phase function in remote sensing reflectance