Modelling of seawater polluted by light and heavy crude oil droplets

• Autorzy: Rudź K. , Darecki M. , Toczek H.
• Języki publikacji: EN

Abstrakty

EN

Significant amounts of crude oil transported from offshore fields to the refineries using tankers or pipelines, demand increased control of seawater pollution. Tanker accidents resulting in oil spills drive much attention, as they influence local marine life and coastal industry. However, the most significant annual amount of crude oil enters the sea in the form of oilin- water emulsion as a result of standard tanker operations, offshore oil extraction and daily work of refineries. Many branches of science are challenged to provide new methods for oil detection, less expensive, more sensitive and more accurate. Remote satellite or airborne detection of large oil spills is possible using joint techniques as microwave radars, ultraviolet laser fluorosensors and infrared radars. Some methods are capable to deal with oil streaks detection and estimation of oil thickness. Although there is currently, no method to detect small concentration of oil droplets dispersed in seawater. Oil droplets become additional absorbents and attenuators in water body. They significantly change seawater inherent optical properties, which imply the change of apparent optical properties, detectable using remote sensing techniques. To enable remote optical detection of oil-in-water emulsion, a study of optical properties of two types of crude oil was conducted. Radiative transfer theory was applied to quantify the contribution of oil emulsion to remote sensing reflectance (Rrs). Spectra of Rrs from in situ measurements in Baltic Sea were compared to Rrs spectra of seawater polluted by 1 ppm of crude oil emulsion, collected using radiative transfer simulation. The light crude oil caused a 9-10% increase of Rrs while the heavy one reduced Rrs up to 30% (model accuracy stayed within 5% for considered spectral range). Results are discussed concerning their application to shipboard and offshore oil content detection.

Słowa kluczowe

EN

oil pollution; remote sensing reflectance; Monte Carlo simulation; radiative transfer; oil-in-water emulsion

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2012
• Tom: Vol. 19, No. 2
• Strony: 473--480
• Opis fizyczny: Bibliogr. 24 poz., rys.

Twórcy

autor

Rudź K.

autor

Darecki M.

autor

Toczek H.

• Gdynia Maritime University, Department of Physics Morska Street 81-87, 81-225 Gdynia, Poland tel.:[phone], fax: [phone],

Bibliografia

• [1] Babin, M., Morel, A., Fell, V. F.-S. F., Stramski, D., Light scattering properties of marine particles in coastal and open ocean waters as related to the particle mass concentration, Limnology and Oceanography, 48 (2), pp. 843-859, 2003.
• [2] Bogucki, D. J., Piskozub, J., Carr, M.-E., Spiers, G. D., Monte Carlo simulation of propagation of a short light beam through turbulent oceanic flow, Opt. Express 15 (21), pp. 13988-13996, 2007.
• [3] Gernez, P., Stramski, D., Darecki, M., Vertical changes in the probability distribution of downward irradiance within the near-surface ocean under sunny conditions, J. Geophys. Res.-Oceans, 2011.
• [4] Kaniewski, E., Otremba, Z., Stelmaszewski, A., Targowski, W., Spectral relationships of the complex refractive index of selected kinds of oil, Proc. XIX Conf. Baltic Oceanogr., 1994.
• [5] Kirk, J. T. O., Monte Carlo modeling of the performance of a reflective tube absorption meter, Appl. Opt. 31, pp. 6463–6468, 1992.
• [6] Kowalczuk, P., Stedmon, C. A., Markager, S., Modeling absorption by CDOM in the Baltic Sea from season, salinity and chlorophyll, J. Mar. Chem. 101 (1), pp. 1-11, 2006.
• [7] Król, T., Stelmaszewski, A., Freda, W., Variability In the optical properties of a crude oil – seawater emulsion, Oceanologia, 48 (S), pp. 203-211, 2006.
• [8] Leathers, R. A., Downes, T. V., Davis, C. O., Mobley, C. D., Monte Carlo Radiative Transfer. Simulations for Ocean Optics: A Practical Guide, Naval Research Laboratory, Washington, DC, 2004.
• [9] Lysiak-Pastuszak, E., Bartoszewicz, M., Bradtke, K., Darecki, M. et al., A study of episodic events in the Baltic Sea - combined in situ and satellite observations, Oceanologia, 2012.
• [10] Mobley, C. D., Light and Water: Radiative Transfer in Natural Waters, Academic Press, San Diego, 1994.
• [11] Otremba, Z., Krol, T., Light attenuation parameters of polydisperse oil-in-water emulsions, Optica Applicata, XXXI (3), pp. 600-609, 2001.
• [12] Otremba, Z., Oil Droplets As Light Absorbents In Seawater, Opt. Express 15 (14), pp. 8592-8597, 2007.
• [13] Otremba, Z., Piskozub, J., Phase functions of oil-in-water emulsions, Optica Appl., XXXIV (1), pp. 93-99, 2004.
• [14] Otremba, Z., Rudz, K., Ocean optics in application to remote detection of an oil-in-water emulsion originating from the engine room, Journal of KONES Powertrain and Transport, 17 (3), Warsaw 2010.
• [15] Otremba, Z., The impact on the reflectance in VIS of a type of crude oil film floating on the water surface, Opt. Express, 7, pp. 129-134, 2000.
• [16] Piskozub, J., Effect of 3-D instrument casing shape on the self-shading of in-water upwelling irradiance, Opt. Express, 12 (14), pp. 3144-3148, 2004.
• [17] Rudz, K., Baszanowska, E., Rohde, P., Zielinski, O., Fluorescence Methods and Monte Carlo Radiative Transfer Simulation Applied to Oil Detection in Baltic Sea, Joint Proceedings, 24, Bremerhaven 2011.
• [18] Rudź, K., Emulsified Fuels of Machine Origin in Seawater – a Contribute to Remote Detection, Journal of KONES Powertrain and Transport, 18 (3), Warsaw 2011.
• [19] Stelmaszewski, A., Determination Of Petroleum Pollutants In Coastal Waters Of The Gulf Of Gdańsk, Oceanologia, 51 (1), pp. 85–92, 2009.
• [20] Stelmaszewski, A., Król, T., Toczek, H., Light scattering in Baltic crude oil – seawater emulsion, Oceanologia, 51 (3), pp. 405–414, 2009.
• [21] Terril, E. J., Melville, W. K., Stramski, D., Bubble entrainment by breaking waves and their influence on optical scattering in the upper ocean, J. Geophys. Res., 106 (C8), pp. 16815-16823, 2001.
• [22] Wozniak, B., Bradtke, K., Darecki, M. et al., SatBaltyk - A Baltic environmental satellite remote sensing system - an ongoing project in Poland. Part 1: Assumptions, scope and operating range, Oceanologia, 2011.
• [23] Wozniak, B., Bradtke, K., Darecki, M. et al., SatBaltyk - A Baltic environmental satellite remote sensing system - an ongoing project in Poland. Part 2: Practical applicability and preliminary results, Oceanologia, 2011.
• [24] Wozniak, S. B., Stramski, D., Modeling The Optical Properties Of Mineral Particles Suspended In Seawater And Their Influence On Ocean Reflectance And Chlorophyll Estimation From Remote Sensing Algorithms, Appl. Opt., 43 (17), pp. 3489-3503, 2004.