SeaWiFS-derived products in the Baltic Sea : performance analysis of a simple atmospheric correction algorithm

• Autorzy: Bulgarelli B. , Mélin F. , Zibordi G.
• Języki publikacji: EN

Abstrakty

EN

The accuracy analysis of an approximate atmospheric correction algorithm for the processing of SeaWiFS data has been investigated for the Baltic Sea. The analysis made use of theoretical radiances produced with the FEM radiative transfer code for representative atmosphere-water test cases. The study showed uncertainties in the determination of the aerosol optical thickness at 865 nm and of the A*ngström exponent lower than š 5% and š 10%, respectively. These results were confirmed by the analysis of 59 match-ups between satellite-derived and in situ measurements for a site located in the central Baltic. Because of the relatively high yellow substance absorption, often combined with the slanted solar illumination, the retrieval of the water-leaving radiance in the blue part of the spectrum appeared to be highly degraded, to the extent that almost no correlation was found between retrieved and simulated values. Better results were obtained at the other wavelengths. The accuracy in the estimation of the remote sensing reflectance ratio R35 decreased with diminishing chlorophyll a concentration and increasing yellow substance absorption, ranging between š 7% and š 47%. The propagation of R35 uncertainties on chlorophyll a estimation was quantified. Keeping the same atmosphere-water conditions, the atmospheric correction scheme appeared sensitive to seasonal changes in the Sun zenith.

Słowa kluczowe

EN

remote sensing; SeaWiFS; atmospheric correction; ocean colour; radiative transfer; Baltic Sea

• Wydawca: Polish Academy of Sciences, Institute of Oceanology ; Elsevier
• Czasopismo: Oceanologia
• Rocznik: 2003
• Tom: No. 45 (4)
• Strony: 655--677
• Opis fizyczny: Bibliogr. 31 poz., rys., tab., wykr.

Twórcy

autor

Bulgarelli B.

• Joint Research Centre of the European Commission, Institute for Environment and Sustainability, Inland and Marine Waters Unit, TP272; IT-21020 Ispra (VA), Italy

autor

Mélin F.

• Joint Research Centre of the European Commission, Institute for Environment and Sustainability, Inland and Marine Waters Unit, TP272; IT-21020 Ispra (VA), Italy

autor

Zibordi G.

• Joint Research Centre of the European Commission, Institute for Environment and Sustainability, Inland and Marine Waters Unit, TP272; IT-21020 Ispra (VA), Italy

Bibliografia

• [1] Bulgarelli B., Mélin F., 2000, SeaWiFS data processing code REMBRANDT version 1.0, Rep. EUR 19514 EN.
• [2] Bulgarelli B., Kisselev V., Roberti L., 1999, Radiative transfer in the atmosphere-ocean system: the finite element method, Appl. Opt., 38, 1530-1542.
• [3] Bulgarelli B., Zibordi G., 2003, Remote sensing of ocean colour: accuracy assessment of an approximate atmospheric correction method, Int. J. Remote Sens., 24, 491-509.
• [4] Darecki M., Weeks A., Sagan S., Kowalczuk P., Kaczmarek S., 2003, Optical characteristics of two contrasting case 2 waters and their influence on remote sensing algorithms, Cont. Shelf Res., 23, 237-250.
• [5] Ferrari G. M., Dowell M. D., Grossi S., Targa C., 1996, Relationship between the optical properties of chromophoric dissolved organic matter and total concentration of dissolved organic carbon in the southern Baltic Sea region, Mar. Chem., 55, 299-316.
• [6] Højerslev N. K., Aas E., 2001, Spectral light absorption by yellow substance in the Kattegat-Skagerrak area, Oceanologia, 43 (1), 39-60.
• [7] Holben B. N., Eck T. F., Slutsker I., Tanré D., Buis J. P., Setzer A., Vermote E., Reagan J. A., Kaufman Y. J., Nakajima T., Lavenu F., Jankowiak I., Smirnov A., 1998, AERONET – a federated instrument network and data archive for aerosol characterization, Remote Sens. Environ., 66, 1-16.
• [8] Hooker S. B., Esaias W. E., 1993, An overview of the SeaWiFS project, EOS Trans. Amer. Geophys. Union, 74, 241-246.
• [9] International Association for Meteorology and Atmospheric Physics. Radiation Commission (IAMPRC), 1984, A preliminary cloudless standard atmosphere for radiation computation, WCP-112, WMO/TD-No. 24, Boulder.
• [10] Kononen K., Leppänen J.-M., 1997, Patchiness, scales and controlling mechanisms of cyanobacterial blooms in the Baltic Sea: Application of a multi-scale research strategy, [in:] Monitoring algal blooms, M. Kahru & C. W. Brown (eds.), Springer-Verl., Berlin, 63-84.
• [11] Kowalczuk P., 1999, Seasonal variability of yellow substance absorption in the surface layer of the Baltic Sea, J. Geophys. Res., 104, 30047-30058.
• [12] Kowalczuk P., Darecki M., 1998, The relative share of light absorption by yellow substances in total light absorption in the surface layer of southern Baltic Sea, paper 1052, pp. 9, S. G. Ackleson (ed.), Proc. 14th Conf. Ocean Optics, 10-13 November 1998, Kailua-Kona (Hawaii).
• [13] Kuśmierczyk-Michulec J., Marks R., 2000, The influence of sea-salt aerosols on the atmospheric extinction over the Baltic and the North Seas, J. Aerosol Sci., 31, 1299-1316.
• [14] Kuśmierczyk-Michulec J., Schulz M., Ruellan S., Krüger O., Plate E., Marks R., de Leeuw G., Cachier H., 2001, Aerosol composition and related optical properties in the marine boundary layer over the Baltic Sea, J. Aerosol Sci., 32, 933-955.
• [15] Larsson U., Elmgren R., Wulff F., 1985, Eutrophication and the Baltic Sea: Causes and consequences, Ambio, 14, 10-14.
• [16] Larsson U., Hajdu S., Walve J., Elmgren R., 2001, Baltic Sea nitrogen fixation estimated from the summer increase in upper mixed layer total nitrogen, Limnol. Oceanogr., 46, 811-820.
• [17] Maritorena S., O’ReillyJ. E., 2000, OC2v2: Update on the initial operational SeaWiFS chlorophyll a algorithm NASA Tech. Memo. 2000-206892, Vol. 11, pp. 3-8, S. B. Hooker & E. R. Firestone (eds.), NASA Goddard Space Flight Center, Greenbelt, Maryland.
• [18] Mélin F., Steinich C., Gobron N., Pinty B., Verstraete M. M., 2002, Optimal merging of LAC and GAC data from SeaWiFS, Int. J. Remote Sens., 23, 801-807.
• [19] Mélin F., Zibordi G., Berthon J.-F., 2003, Assessment of SeaWiFS atmospheric and marine products for the Northern Adriatic Sea, IEEE Trans. Geosci. Remote Sens., 41, 548-558.
• [20] Neumann T., Fennel W., Kemp C., 2002, Experimental simulations with an ecosystem model of the Baltic Sea: A nutrient load reduction experiment, Global Biogeochem. Cycles, 16, 10.1029/2001GB001450.
• [21] Ohde T., Sturm B., Siegel H., 2002, Derivation of SeaWiFS vicarious calibration coefficients using in situ measurements in Case 2 water of the Baltic Sea, Remote Sens. Environ., 80, 248-255.
• [22] Olszewski J., Sagan S., Darecki M., 1992, Spatial and temporal changes in some optical parameters in the southern Baltic, Oceanologia, 33, 87-102.
• [23] Schwarz J. N., Kowalczuk P., Kaczmarek S., Costa G. F., Mitchell B. G., Kahru M., Chavez F. P., Cunningham A., McKee D., Gege P., Kishino M., Phinney D. A., Raine R., 2002, Two models for absorption by coloured dissolved organic matter (CDOM), Oceanologia, 44 (2), 209-241.
• [24] Siegel H., Gerth M., 1999, Remote sensing studies of the exceptional summer of 1997 in the Baltic Sea: The warmest August of the century, the Oder flood, and phytoplankton blooms, [in:] Satellites, oceanography and society, D. Halpern (ed.), Elsevier, Amsterdam, 239-255.
• [25] Siegel H., Gerth M., Neumann T., Doerffer R., 1999, Case studies on phytoplankton blooms in coastal and open waters of the Baltic Sea using Coastal Zone Color Scanner data, Int. J. Remote Sens., 20, 1249-1264.
• [26] Smirnov A., Holben B. N., Kaufman Y. J., Dubovik O., Eck T. F., Slutsker I., Pietras C., Halthore R. N., 2002, Optical properties of atmospheric aerosols in marine environments, J. Atmos. Sci., 59, 501-523.
• [27] Sturm B., Zibordi G., 2002, SeaWiFS atmospheric correction by an approximate model and vicarious calibration, Int. J. Remote Sens., 23, 489-501.
• [28] Witek Z., Ochocki S., Maciejowska M., Pastuszak M., Nakonieczny J., Podgórska B., Kownacka J. M., Mackiewicz T., Wrzesińska-Kwiecień, 1997, Phytoplankton primary production and its utilization by the pelagic community in the coastal zone of the Gulf of Gdańsk (southern Baltic), Mar. Ecol. Prog. Ser., 148, 169-186.
• [29] Zernova V. V., 1997, Autumn Baltic phytoplankton, Oceanology, 37, 215-222.
• [30] Zibordi G., Berthon J. F., Doyle J. P., Grossi S., van der D. Linde, Targa C., Alberotanza L., 2002, Coastal Atmosphere and Sea Time Series (CoASTS), Part 1: A long-term measurement program, NASA Tech. Memo. 2002-206892, Vol. 19, pp. 1-29, S. B. Hooker & E. Firestone (eds.), NASA Goddard Space Flight Center, Greenbelt, Maryland.
• [31] Zibordi G., Mélin F., Hooker S. B., D’Alimonte D., Holben B., 2003, An Autonomous Above-Water System for the Validation of Ocean Color Radiance Data, IEEE Trans. Geosci. Remote Sens.