Abstracts of my papers:
- Title: Investigation of marine aerosol with multifrequency lidar
Authors: Zielinski Andrzej; Piskozub Jacek; Irczuk Miroslaw; Zielinski Tymon
Journal: Proc. SPIE Vol. 1936, p. 213-222, Applied Laser Radar Technology, Gary W. Kamerman; William E. Keicher; Eds.
Publication Date: 10/1993
Abstract:
Results of preliminary measurements of aerosol concentrations and fluxes in the coastal zone above Gdansk Bay arepresented. The measurements were carried out by means of the lidar system FLS-12 from the coast of South Baltic in Sopot and Hel, from June to November 1992. Using lidar data the authors calculated height profiles of particle concentrations. Also, the influence of wind speed on particle fluxes and total particle mass were investigated.
- Title: Multifrequency lidar in atmospheric studies: solution of the inverse problem for two models of
marine aerosol
Author: Piskozub Jacek
Journal: Proc. SPIE Vol. 1936, p. 223-232, Applied Laser Radar Technology, Gary W. Kamerman; William E.Keicher; Eds. Publication Date: 10/1993
Abstract:
A discussion of the multifrequency lidar inverse problem in aerosol research is given. Two models of marigenic aerosol are described for water and water/salt aerosol ensembles. The Tikhonov functional solution method of the inverse problem forboth models is described. The algorithms for calculating the values of the scattering medium optical parameters and the size-distribution functions of the aerosol are discussed. The numerical simulations done to test the inverse problem solution algorithms are described and a short discussion of the results is given.
- Title: Estimation of kinetic coefficients describing marine aerosol by means of a lidar method
Author: Zielinski Tymon, Piskozub Jacek, Zielinski Andrzej
Journal: J. Aerosol. Sci., Vol. 24, Suppl.1, 425. Publication Date: 10/1993
Abstracts: No available
- Title: Short-life fluorescence as an indice of chlorophyll 'a' concentration
Authors: Hapter Ryszard; Piskozub Jacek; Kaczmarek Slawomir; Ostrowska Miroslawa
Journal: Proc. SPIE Vol. 2048, p. 11-19, Underwater Light Measurements, Hans-Christian Eilertsen; Ed.
Publication Date: 12/1993
Abstract:
Fluorescence profiles were measured together with water samples taken in three expeditions to Norwegian Sea between 1988 and 1991. Chlorophyll concentration values obtained for the samples with a spectrophotometric method were used to recalibrate the fluorescence profiles to chlorophyll units.
- Title: Multifrequency lidar inverse problem in atmospheric aerosol studies for simple marigenic aerosol
models",
Authors: Piskozub Jacek
Journal: Ocanologia 28, pp. 69-76.
Publication Date: 1990
Abstract:
The multifrequency lidar inverse problem in aerosol research is discussed. Two models of marigenic aerosol are presented for water and water/salt aerosol ensembles. The Tikhonov functional solution method of the inverse problem for bth models is described. The algorithms for calculating the values of the scattering medium optical parameters and the size-distribution functions of the aerosol are discussed. The numerical simulations performed to test the inverse problem solution algorithms are described and a brief discussion of the results is given.
- Title: Solution of multifrequency lidar inverse problem for a pre-set marine aerosol size-distribution
formula
Author: Piskozub Jacek
Journal: Proc. SPIE Vol. 2222, p. 250-255, Atmospheric Propagation and Remote Sensing III, Walter A. Flood; Walter B. Miller; Eds. Publication Date: 06/1994
Abstract:
A solution of the inverse problem concerning finding aerosol size distribution for a multifrequency lidar system working on a small number of wavelengths is proposed. The solution involves a best- fit method of finding parameters in a pre-set formula of particle size distribution. A comparison of results calculated with the algorithm from experimental lidar profiles with PMS data collected in Baltic Sea coastal zone is given.
- Title: Effects of surface waves and sea bottom on self-shading of in-water optical instruments
Author: Piskozub Jacek
Journal: Proc. SPIE Vol. 2258, p. 300-308, Ocean Optics XII, Jules S. Jaffe; Ed.
Publication Date: 10/1994
Abstract:
Calculations of self-shading for an instrument measuring upward irradiance were conducted with a Monte-Carlo radiance transfer algorithm. The algorithm included Cox-Munk wave- slope probability function and simulation of diffusion on sea-bottom allowing incorporation of rough and/or shallow sea in the simulations. The effect of the self-shading phenomenon was calculated in the function of instrument radius, sea-water absorption, surface roughness (depending on assumed wind velocity up to 15 m/s) depth of the instrument, its height over bottom and bottom albedo (both diffusive and reflective one).
- Title: A comparison of several measurement techniques used in BAEX'93 marine aerosol experiment
Author: Piskozub Jacek, Petelski Tomasz, Krol Tadeusz, Marks Roman, Chomka Maria
Journal: 19th CBO Proceedings, Part I, pp.36-42
Publication Date: 1994
Abstract:
During BAEX aerosol experiment (1993, 1994 and 1995 in Lubiatowo and off the coast on s/y Oceania) complex measurement of aerosol parameters were carried out. The experiments involved measurements of aerosol concentration with PMS (Classical Scattering Aerosol Spectrometer Probe) counter, impactors, horizontal sounding of the breaker zone with a multifrequency lidar and high volume air sampling. Both the PMS counter and lidar profiles made possible determining of aerosol particle size distributions. PMS counter gives much more accurate size distribution of aerosol particles, however lidar sounding gives spatial variability of its concentration along the sounding optical path. Comparison of the results obtained with the two instruments as well as impactors and high volume filters were carried out. The advantages of making simultaneous measurements with several systems with different basis of operation are discussed.
- Title: Results of Lidar Based Investigations of Marine Aerosol Concentrations
in the Coastal Zone of the Southern Baltic
Author: Zielinski Andrzej, Piskozub Jacek, Krol Tadeusz, Irczuk Miroslaw, Drozdowska Violetta
Journal: 19th CBO Proceedings, Part I, pp.64-75
Publication Date: 1994
Abstract:
This paper presents results of marine aerosol investigations which were carried out during the international experiment BAEX'93 in October 1993. The authors used the lidar system FLS-12 for investigation of marine aerosols in the air above the coastal zone in the Southern Baltic in Lubiatowo. Visible light in the following wavelengths: 445nm, 470nm and 665nm was used for measurements. The backscattered signals were registered under various meteorological conditions over a period of 7 days. Using lidar data, the size distribution functions and concentrations of marine aerosols were determined. Also, the influence of relative air humidity and air temperature as well as wind direction and velocity on the above mentioned parameters were described.
- Title: Study of spatial distribution of marine aerosol over sea coast with a multifrequency lidar
system
Author: Piskozub Jacek
Journal: Proc. SPIE Vol. 2471, p. 387-389, Atmospheric Propagation and Remote Sensing IV, J. Christopher Dainty; Ed.
Publication Date: 06/1995
Abstract:
Marine aerosol was studied with the excimer-dye laser multifrequency lidar of Institute of Oceanology in several sites on the Southern Baltic Polish coast. The aerosol was sounded from lidar located in a van a few hundred feet from the shore in different meteorological conditions. The soundings were performed at several angles to the horizon, starting from horizontal optical path. The backscattered signal collected at 2 - 4 wavelengths allowed for calculation of total aerosol concentration and estimation of its size-distribution every 20 feet of the optical paths at several heights over the sea surface. This allowed for 2D mapping of aerosol concentration over the wave-breaking zone and the shore. The 2D aerosol concentration maps obtained in the research will be useful for verification of models of mass and energy fluxes in the wave-breaking zone of coastal sea basins.
- Title: Lidar studies of marine aerosol in the coastal zone
Authors: Zielinski Andrzej; Piskozub Jacek; Irczuk Miroslaw; Zielinski Tymon
Journal: Proc. SPIE Vol. 2471, p. 428-438, Atmospheric Propagation and Remote Sensing IV, J. Christopher Dainty; Ed.
Publication Date: 06/1995
Abstract:
This paper presents the results of lidar investigations of aerosol concentrations over the breaker zones. These investigationshave been carried out in the Institute of Oceanology PAS since 1992. The measurements were carried out under various weather conditions during several cruises aboard the y/s Oceania on the Baltic and during shore experiments from the Polish coast towards the Gulf of Gdansk as well as the open Baltic Sea. Simultaneous measurements with a PMS aerosol spectral probe and impactors were carried out during the experiments. The concentrations and size distribution functions of aerosols as well as vertical and horizontal gradients of aerosol concentration, mass fluxes and residence times were determined from backscattered lidar signals at various altitudes.
- Title: Measurements of biologically optical parameters in Svalbard and Norwegian Sea regions
Authors: Piskozub Jacek; Hapter Ryszard
Journal:Nordic Seas Symposium Proc., Hamburg, pp. 161-164
Publication Date: 1995
Abstract:
Vertical profiles of light attenuation in several optical channels as well as of fluorescence were measured during expeditions of r/v Oceania to Norwegian and Barents Seas. The cruises took place during sumer months in the region north of Noreway up to Svalbard. The results from 1987, 1988, 1989 and 1991 are presented in the paper. Typical profiles and average ones for various basins are presented. Corelations between fluorescence and attenuation at various wavelengths are calculated. The results suggest strong regional and interannual variability. The best was achieved at 665 nm.
- Title: Oil Content in the Baltic Sea Water and Possibilities of Detection and Identification by the Lidar Method
Authors: Piskozub Jacek; Otremba Zbigniew, Drozdowska Violetta, Krol Tadeusz, Stelmaszewski Adam
Journal: Proceedings of Baltic Marine Science Conference, Roenne, Borholm, 1996
Publication Date: 1997
Abstract:
Measurements aimed at detecting and identification of oil derivatives on the sea-surface in the Baltic Sea were conducted during six cruises of r/v Oceania (2 in each of 1994, 1995 and 1996). In every cruise lidar measurements of water fluorescence were performed and water samples at several geographic positions. The water samples were examined with an laboratory fluorescence technique. Discussion of the preliminary results is provided. The results show that there is a possibility of real-time detection of even minute amounts of oil derivatives on the sea-surface.
- Title: A lidar system for remote measurements of oil film
thickness on sea surface
Authors: Piskozub Jacek; Drozdowska Violetta, Varlamov Viktor
Journal: Proce Proceedings of Fourth International Conference on Remote Sensing for Marine and Coastal Environments. Technology and Applications, ERIM, p. I-386.
Publication Date: 1997
Abstract:
A new lidar system FLS-UV designed for measurement of oil film thickness is described. The system consisting of solid state 299 nm laser and a multichannel spectral receiver was produced by LDI Ltd, Tallinn Estonia in close collaboration with Laser Laboratory of Institute of Oceanology, Sopot, Poland. The system is able to measure oil film thickness in the range of 0.5 - 10 micrometers. It utilizes two methods: light absorption of Raman band in UV and measurement of fluorescence band intensity. The system is designed for continuous measurement from ship or low altitude aircraft. Technical description of the system as well as first experimental results are presented.
- Title: A water Raman extinction lidar system for
detecting thin oil spills: preliminary results of fields tests
Authors: Piskozub Jacek; Drozdowska Violetta, Irczuk Miroslaw
Journal: Oceanologia 40 (1), pp. 3-10
Publication Date: 1998
Abstract:
A new lidar system FLS-UV using the extinction of laser-induced water Raman signal for detecting of thin oil slicks. The system uses a solid state laser with frequency multiplication and an array of photomultipliers to measure oil film thickness in the range of 0.5 - 10 micrometers. The system was tested in two cruises of R/V Oceania in South Baltic in May and September 1997. Technical description of the system as well as the first experimental results are presented and the system possibilities and limitations are discussed.
- Title: Asyptotic light field in the presence of
a bubble-layer
Authors: Flatau Piotr J., Piskozub Jacek; Zaneveld J. Ronald V.
Journal: Optics Express 5,5 p. 120
Publication Date: 1999
Abstract:
We report that the submerged microbubbles are an efficient source of diffuse radiance and may contribute to a rapid transition to the diffuse asymptotic regime. In this asymptotic regime an average cosine is easily predictable and measurable.
- Title: Aerosol optical thickness over the coastal area of the southern Baltic Sea
Authors: Zielinski Tymon; Zielinski Andrzej; Piskozub Jacek; Drozdowska Violetta; Irczuk Miroslaw.
Journal: Optica Applicata 29 (4) pp. 439-447
Publication Date: 1999
Abstract:
The aerosol component of extinction in the marine boundary layer over coastal areas can be determined by using the lidar method and through the application of the Mie's theory to derive the aerosol concentration and size distribution. This can be done for the various meteorological conditions and at various altitudes above the sea surface.
- Title: Self-shading of upwelling irradiance for an instrument with sensors on a sidearm
Authors: Piskozub Jacek; Weeks Alison R.; Schwarz Jill N.; Robinson Ian S.
Journal: Applied Optics 39 (12) pp. 1872-1878
Publication Date: 20 April 2000
Abstract:
The self-shading measurement error of the upwelling irradiance that is due to the presence of the instrument housing of an optical spectrometer with the irradiance meter located on a sidearm was calculated with a Monte Carlo code. The dependence of the effect on the instrument dimensions, the values of real optical parameters, sea-surface roughness, and Sun zenith angle were all studied to estimate maximum errors for two possible configurations of a proposed new marine spectrophotometer.
- Title: Regional oceanographic database as a modern sea reaserch tool
Authors: Piskozub Jacek; Porazinski Krzysztof, Sagan Slawomir, Walczowski Waldemar, Wichorowski Marcin, Wyrwinski Jacek
Journal: TASK Quarterly 4 (1) pp. 127-136
Publication Date: 2000
Abstract:
Based on the experience acquired from working on the Regional Oceanographical Database at the IOPAS in Sopot a general view of database as a tool for supporting scientific reasearch was presented. Article describes general structure, data flow and techniques of using the ROD.
- Title: Monte Carlo study of the scattering error of a quartz reflective absorption tube
Authors: Piskozub Jacek; Flatau Piotr J.; Zaneveld J.Ronald V.
Journal: Journal of Oceanic and Atmospheric Technology, Vol. 18, No. 3, pp. 438-445.
Publication Date: 2001
Abstract:
A Monte Carlo model was used to study the scattering error of an absorption meter with divergent light beam and limited acceptance angle of the receiver. Reflections at both ends of the tube were taken into account. Calculations of the effect of varying optical properties of water as well as the receiver geometry were performed. A weighting function showing quantitatively the scattering error as a function of angle was introduced. Some cases of practical interest are discussed.
- Title: Influence of instrument casing shape on self-shading of in-water radiation
Authors: Piskozub Jacek
Journal: proceedings of Ocean Optics XIV, Kailua-Kona, Hawaii, USA
Publication Date: 1998
Abstract:
The self-shading measurement error of the upwelling irradiance due to the presence of the volume of the typical cylindrical housing of an optical instrument was calculated with a Monte-Carlo code as the function of the housing dimensions and of the optical parameters of the sea-water. The resulting values were compared to the self-shading error for a flat disk of the same diameter, originally used to establish self-shading error estimations universally used in marine optics. The results show that the self-shading of upwelling irradiance is underestimated by up to 20% producing a significant underestimation the measured upwelling irradiance, and therefore reflectance, especially in turbid waters.
- Title: Optical extinction in the marine boundary layer
measured by lidar
Authors: Zielinski Tymon, Piskozub Jacek; Zielinski Andrzej
Journal: proceedings of Ocean Optics XIV, Kailua-Kona, Hawaii, USA
Publication Date: 1998
Abstract:
This paper presents the results of research, which started in 1992, and has been dedicated to determination of aerosol dynamics in the marine boundary layer under various hydrometeorological conditions by means of the lidar method. By employing several wavelengths the lidar obtained optical extinction gives very accurate information about the size distribution of aerosols as well as their concentrations under various weather conditions and at different altitudes above the sea surface. It was revealed that in the marine boundary layer over the breaker zones of the southern Baltic Sea optical extinction depends on the method of calculation and wind direction as well as altitude above the sea. The results provided valuable inputs for investigations of the physical processes, as well as an important data set to use for development of modeling of aerosol type and its dynamics in the coastal areas of the Southern Baltic Sea.
- Title: The use of scattering error in absorption measurement
for estimating the scattering phase function of marine phytoplankton
Authors: Piskozub, Jacek; Stramski, Dariusz
Journal: presented at Ocean Optics XIV, Monte Carlo, Monaco, 16-20 October 2000
Publication Date: 2000
Abstract:
We present an approach to estimate the scattering phase function of marine phytoplankton which combines measurements of absorption and 3-D Monte Carlo simulations of the associated scattering error. The absorption measurements were made on suspensions of phytoplankton cells with a double-beam spectrophotometer equipped with an integrating sphere. The Monte Carlo model was used to determine the weighting function that describes the angular distribution of photon losses due to scattering, which is dependent solely on the geometry of the measurement. Our approach takes the advantage of the fact that phytoplankton absorption in the near infrared is negligible, so the measured values within that spectral region represent the scattering error only. Assuming that the phase function can be approximated by the Henyey-Greenstein formula, we find the asymmetry coefficient of that function, which provides the best match between the measured and calculated scattering error. We illustrate the results for two species of phytoplankton, a cyanobacterium Synechococcus and a diatom Thalassiosira pseudonana. The estimated Henyey-Greenstein functions show significantly higher values of backscattering ratio than those obtained from Mie theory for homogeneous spheres.
- Title: An optical technique for remote sensing
of near-surface turbulence
Authors: Bogucki, Darek J.; Piskozub, Jacek; Stramski, Dariusz
Journal: presented at Ocean Optics XIV, Monte Carlo, Monaco, 16-20 October 2000
Publication Date: 2000
Abstract:
Measurements of turbulent kinetic energy dissipation rates (TKE) or temperature dissipation rates of the near-surface boundary layer are needed to understand air-sea exchange processes and rates. The capability to accurately estimate these variables by means of a remote technique is relevant to a number of questions ranging from the air-sea transfer of heat and gas to the fate of pollutants. The intermittent and variable nature of processes governing TKE or temperature dissipation require both high frequency and good spatial coverage of near-surface energetics. The large dynamic range of the active air-sea boundary presents difficulties to in situ measurement. At present, no technique provides a capability to directly measure the energetics of the near-surface oceanic layer. We propose a non-invasive method based on optical remote sensing to quantify the energetics in the immediate vicinity of the air-sea boundary. Our optical method is based on the near-forward light scattering within a turbulent flow field. It permits the quantification of the energy and temperature dissipation rates. The Monte Carlo simulations of radiative transfer show that the method will be insensitive to the state of the ocean surface, that is it can perform well at low and high wind speeds.
- Title:
"The modification of light flux leaving a wind-roughened,
oil covered sea surface: example of computations for shallow seas"
Authors: Otremba Zbigniew; Piskozub, Jacek
Journal: Oceanological Studies, Vol. 29, No. 1, pp. 117-133
Publication Date: 2001
Abstract:
This paper presents chosen results of modelling of upward light flux over a rough sea surface covered with an oil film. In upward irradiance computations (by means of Monte Carlo method), the optical parameters of two types of water were taken into consideration: water typical for bays of the Baltic Sea (Case 2 water) and ocean (Case 1) waters, both covered with an oil layer 5 *m thick (Romashkino). Coefficients of reflectance and transmission for the oil film were used for the calculations. These were obtained through the mathematical simulation of the route of light rays, both upward and downward, through the oil film. The obtained results show that oil films influence upward light fluxes over the sea surface, and that this influence depends on the depth and roughness of the sea. The analyses of oil film visibility on sea surfaces revealed also the influence of the direction of observation.
- Title:
"Modelling of the optical contrast of an oil film on a sea surface"
Authors: Otremba, Zbigniew; Piskozub, Jacek
Journal: Optics Express, 9, pp. 411-416
Publication Date: 2001
Abstract:
The water-leaving radiance field above a sea surface polluted by an oil film has been modelled using a Monte Carlo radiative transfer technique with large numbers of photons incident at a selected zenith angle. The calculated radiance was recorded for each of the 240 sectors of equal solid angle the upper hemisphere had been divided into. The results are presented in the form of a bi-directional reflectance distribution function (BRDF) and as a contrast function parameterised by observation angle for various angles of incident sunlight and for various states of the sea surface roughness. The conditions for observing maximal and minimal contrast are described.
- Title:
"The results of Polish oceanographic investigations focused on interannual variability of the Greenland Sea energoactive zones "
Authors: Czeslaw Druet, Czeslaw Garbalewski, Ryszard Hapter, Andrzej Jankowski, Slawomir Kwasniewski, Maciej Muzalewski, Jacek Piskozub, Jan Piechura, Tomasz Petelski, Pawel Schlichtholz, Jozef Wiktor, Ryszard Siwecki, Slawomir Swerpel, Jan Marcin Weslawski, Andrzej Zielinski, Waldemar Stepko
Journal: Studia i Materialy Oceanologiczne, no. 65, Polar Marine Research (2), pp. 3-223
Publication Date: 1993
Abstract:
In the years the years 1987 - 1989 the Institute of Oceanology of Polish Academy of Sciences in Sopot accomplished oceanographical investigations in the energoactive zones of the Northern Atlantic within the ,,Greeland Sea Project''. The aim of the Polish part of the project was to examine the intermonthly and interannual variability of hydrophysical fields and the dynamics of the near - surface atmospheric layer in the selected regions of the ocean, in order to determine the role of these factors in the formation of climatic anomalies of the ocean - atmosphere interaction during summer months: July and August. The main research region were the confluence zone of the Norwegian Sea and Barents Sea. The 3 - year program of meteorological, hydrological and biological empirical investigations accomplished onboard the research vessel 'Oceania'. This paper is a presentation of aero- and hydrophysical characteristics obtained from the technical processing of empirical data, whose analysis made it possible to reveal a number of features characterizing the intermonthly and interannual variability of aero- and hydrophysical fields in the regions examined, as well as the causal nexus of hydrological and hydrobiological anomalies. This paper is not a final synthesis. The empirical data and analytical results presented herein can be used for futher investigations.
- Title: 3-D radiative transfer
modeling of the effect of bubble clouds on remote-sensing reflectance
Authors: Jacek Piskozub, Dariusz Stramski, Eric Terrill, W. Kendall Melville
Journal: presented at Ocean Optics XIV, Monte Carlo, Monaco, 16-20 October 2000
Publication Date: 2002
Abstract:
We examined the effect of bubble clouds on remote-sensing reflectance with a 3-D Monte Carlo model of radiative transfer. The geometry of bubble clouds and the concentration and size distribution of bubbles were defined based on acoustical measurements of bubbles in the surface ocean. The light scattering properties of bubble clouds for various void fractions were calculated using Mie theory. We show how the spatial pattern, magnitude, and spectral behavior of remote-sensing reflectance produced by a bubble cloud is changing due to variations in the geometric and optical properties of the bubble cloud and background optical properties of ambient water. For various values of the inherent optical properties of water, we also determined the minimum size of bubble cloud, above which the water-leaving light field can be reasonably well estimated from a 1-D radiative transfer model with a plane-parallel geometry.
- Title:
"Modeling the remotely sensed optical contrast caused by oil suspended in the sea water column"
Authors: Otremba, Zbigniew; Piskozub, Jacek
Journal: Optics Express 11, 2-6.
Publication Date: 2003
Abstract:
The reflectance of the sea area polluted by oil-in-water emulsion has been modelled using radiance transfer Monte Carlo code. Example results of contrast function parameterised by observation angle for various angles of incident sunlight, for various states of the sea surface roughness and for two optically different types of seawaters are presented.
- Title:
"Estimation of scattering error in spectrophotometric measurements of absorption by aquatic particles from 3-D radiative transfer simulations"
Authors: Stramski, Dariusz; Piskozub, Jacek
Journal: Applied Optics (submitted on October 14, 2002)
Publication Date: 2003
Abstract:
We present an approach to estimate the scattering error in spectrophotometric measurements of absorption by aquatic particles, which is based on 3-D Monte Carlo radiative transfer simulations of measurement geometry. Our specific measurement geometry involves a light beam incident on a 1-cm cuvette with particle suspension, which is placed in front of the entrance to the integrating sphere of a typical laboratory spectrophotometer. From the Monte Carlo simulations we determined the weighting function, W(ψ), that describes the angular distribution of photon losses due to scattering on suspended particles. This function is dependent solely on the measurement geometry and does not depend on the optical properties of the sample. The scattering error is estimated by combining W(ψ) with the volume scattering (or scattering phase) function of particles. We applied this scattering correction method to absorption measurements that were made on two species of marine phytoplankton, a diatom Thalassiosira pseudonana and a cyanobacterium Synechococcus. Assuming that the scattering phase function is described by the Henyey-Greenstein formula, we determined the values of backscattering ratio (i.e., the ratio of backscattering to total scattering coefficient of particles), which yield the best correction at light wavelength of 750 nm (i.e., null absorption). The estimated values of backscattering ratio for both phytoplankton species are significantly (4- to 10-fold) higher than previously reported data that involved Mie scattering calculations for homogeneous spheres. We also found that, depending on the type of particles, the corrected absorption spectra obtained with our fairly rigorous method may be similar or significantly different than the spectra obtained with the commonly used, simple null point correction based on wavelength-independent scattering error.
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Jacek Piskozub <piskozub@iopan.gda.pl>, Last updated: January 14, 2003
