Abstract
An investigation of the optical response of the atmosphere before, during, and afterthe total solar eclipse of 26 February 1998 at the Caribbean Peninsula of Paraguaná (Falcón State) in Venezuela, was made by measuring photometrically the intensity of the sky brightness in three strategic directions: zenith, horizon anti-parallel or opposite the umbra path, and horizon perpendicular to this path. From these measurements, and by applying in an inverse way an empirical photometric model, very rough estimations of theextinction coefficient, and also of the average optical depth, were obtained in one of these particular directions. However based on meteorological measurements such as those of relative humidity and temperature, and applying a different model, a better estimation in the visual of the total global extinction coefficient of the sky (except the horizon), were made considering the contribution of each component: atmospheric aerosol, water vapour, ozone and Rayleigh scattering. It is shown that this global coefficient is mostly dependent upon aerosol extinction. In spite of the strong reduction of sky brightness photometrically observed during the totality, the results show that the sky was not dark. This is confirmed by the results obtained for the total global extinction coefficient. Additionally it is estimated that the total solar eclipse that took place also in Falcón State, Venezuela, at the beginning of the last century on 3 February 1916, was ∼30% darker that the 1998 eclipse, and that atmospheric aerosol played a relevant and similar role in the scattering of sunlight during the totality as it was for 1998's. Visual observations made during each event, which show that at length only one or two bright stars could be seen in the sky, support the results obtained for both eclipses.
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Abney, W. de W. and Thorpe: 1889, Phil. Trans. Roy. Soc. Lond. 180, 363.
Allen, C. W.: 1973, Astrophysical Quantities, 3rd edn., The Athlone Press, University of London, pp. 176, 239–241.
Anderson, J.: 1999, ‘Meteorological Changes during a Solar Eclipse’, Weather 54, 207–215.
Baker, D. J.: 1974, ‘Rayleigh, the Unit of Light Radiance’, Appl. Opt. 13, 2160–2163.
Baker, D. J. and Romick, G. J.: 1976, ‘The Rayleigh: Interpretation of the Unit in Terms of Column Emission Rate or Apparent Radiance Expressed in SI Units’, Appl. Opt. 15, 1966–1968.
Bansal, M. K. and Verma, T. S.: 1998, ‘Aerosol Measurements at Roorkee Relating to the Total Solar Eclipse of 24 Oct. 1995’, Indian J. Radio Space Phys. 27, 260–263.
Betenska, N.: 1944, ‘Concerning the Brightness of the Sky and the Illumination of the Earth during the Full Phase of a Solar Eclipse’, J. Br. Astron. Assoc. 54, 124–125.
Bhattacharyya, J. C.: 1978, The Eclipse of February 16, 1980-Path of Totality in India, Report of India Institute of Astrophysics, Bangalore.
Bose, S., Lal, M., and Ghosh, A. B.: 1997, ‘Measurements of Water Vapour over Delhi during the Solar Eclipse-1995’, Kodaikanal Obs. Bull. 13, 183–187.
Brooks, Ch. F., Fergunson, S. P., Kimball, H. H., Haurwitz, B., Brooks, E. S., Namias, J., Pierce, Ch. H.,Wexler, H., and Brooks, E.M.: 1941, Eclipse Meteorology with Special Reference to the Total Solar Eclipse of August 31, 1932, Harvard Meteorological Studies No. 5, Harvard University (Blue Hill Meteorological Observatory), Milton, MA, 109 pp.
Bruin, F.: 1981, ‘Atmospheric Refraction and Extinction near the Horizon’, Arch. Hist. Exact Sci. 25, 1–17.
Carman, E. H., Skinner, N. J., and Heeran, M. P.:1981, ‘Zenith Sky Brightness and Airglow Emissions during the Equatorial Solar Eclipse of 30 June 1973’, Appl. Opt. 20, 778–785.
Dandekar, B. S.: 1968, ‘Measurements of the Zenith Sky Brightness and Color during the Total Solar Eclipse of 12 November 1966 at Quehua, Bolivia’, Appl. Opt. 7, 705–710.
Dandekar, B. S. and Turtle, J. P.: 1971, ‘Day Sky Brightness and Polarization during the Total Solar Eclipse of 7 March 1970’, Appl. Opt. 10, 1220–1224.
Dani, K. K. and Devara, P. C. S.: 1996, ‘Multispectral Measurements of Aerosol, Optical Thickness around the Total Eclipse of 24 October 1995 over Robertgunj, India’, J. Aerosol Sci. 27, S73-S74.
del Castillo, E. A., Freitez, R., Wohnsiedler, S., Torrealba, J. Ma., Fortuna, R., del Castillo, J. M., García, J., de los Santos, F., Briceño, A. S., and Alvarado, R.: 1916, Our Contribution to the Observations of the Total Solar Eclipse of 3 February 1916, Tipografía Alvarez. Barquisimeto, Venezuela, 27 pp. (in Spanish).
Darula, S. and Kittler, R.: 2000, ‘Daylight during Solar Eclipse’, CTU Rep. 4, 29–32.
Darula, S., Kambezides, H. D., and Kittler, R.: 2001, ‘Daylight Levels during the Solar Eclipse of 11 August 1999’, Meteorol. Atmos. Phys. 76, 251–256.
Duffett-Smith, P.: 1997, Easy PC Astronomy, Cambridge University Press, 151 pp.
Espenak, F. and Anderson, J.: 1994, Total Solar Eclipse of 1995 October 24, NASA Reference Publication 1344, 73 pp.
Espenak, F. and Anderson, J.: 1996, Total Solar Eclipse of 1998 February 26, NASA Reference Publication 1383, 97 pp.
Fernández, W., Castro V., Wright, J., Hidalgo, H., and Sáenz, A.: 1993, ‘Changes in Solar Irradiance and Atmospheric Turbidity in Costa Rica during the Total Solar Eclipse of July 11, 1991’, Earth Moon Planets 63, 119–132.
Fernández, W., Azofeifa, D. E., and Villalobos, J. A.: 1992, ‘El Eclipse Total de Sol del 11 de julio de 1991: Aspectos Generales’, in W. Fernández (ed.), El Eclipse Total de Sol del 11 de Julio de 1991: Observaciones Científicas Realizadas en Costa Rica, Editorial de la Universidad de Costa Rica, San José.
Fiala, A. D.: 1976, Solar Eclipses of 1977, US Naval Observatory Circular No. 156, Washington, D.C., pp. 24–29.
Fiala, A. D. and Lukac, R. L.: 1978, Total Solar Eclipse of 16 February 1980, US Naval Observatory Circular No. 158, Washington, D.C.
Gedzelman, S. D.: 1975, ‘Sky Color near the Horizon during a Total Solar Eclipse’, Appl. Opt. 14, 2831–2837.
González, G.: 1997, ‘Ground-Level Humidity, Pressure and Temperature Measurements during the October 24, 1995 Total Solar Eclipse’, Kodaikanal Obs. Bull. 13, 151–154.
Halley, E.: 1715, Phil. Trans. Roy. Soc. 20, 145.
Hearnshaw, J. B.: 1992, ‘Origins of Stellar Magnitude Scale’, Sky Telesc. 84, 494–499.
Hegg, D., Larson, T., and Yuen, P-F.: 1993, ‘A Theoretical Study of the Effect of Relative Humidity on Light Scattering by Tropospheric Aerosols’, J. Geophys. Res. 98D, 18435–18439.
Hughes, D. W.: 2000, ‘Brightness during a Solar Eclipse’, J. Br. Astron. Assoc. 110, 203–205.
Hunten, D. M., Roach, F. E., and Chamberlain, J. W.: 1956, ‘A Photometric Unit for the Airglow and Aurora’, J. Atmos. Terr. Phys. 8, 345–346.
James, N.: 1998, ‘The Total Eclipse from Venezuela’, J. Br. Astron. Assoc. 108, 127–128.
Jerrard. H. G. and McNeill, D. B.: 1986, A Dictionary of Scientific Units, Chapman and Hall, Ltd., 5th edn., London, 117 pp.
Jeske, H.: 1988, ‘Meteorology Optics and Radiometeorology’, in G. Fischer (ed.), Landolt-Börnstein Numerical Data and Functional Relationships in Science and Technology, New Series, V/4b, Springer-Verlag, Berlin, pp. 187–348.
Krisciunas, K. and Schaefer, B. E.: 1991, ‘A Model of the Brightness of Moonlight’, Publ. Astron. Soc. Pacific 102, 1033–1039.
Kuiper, J. and van der Woude, M.: 1998, ‘De Totale Zonsverduistring van 26 Februari 1998(1)’, Meteorologica 2, 26–29, (Kuiper, J.) (2) 3, 32–33, (3) 4, 21–23.
Lloyd, J. W. F. and Silverman, S. M.: 1971, ‘Measurements of the Zenith Sky Intensity and Spectral Distribution during the Solar Eclipse of 12 November 1966 at Bagé, Brazil, and on an Aircraft’, Appl. Opt. 10, 1215–1219.
Liu, C-Y. and Zhou, X-L.: 1999, ‘The Sky Brightness When the Rising Sun Is in Eclipse’, Chin. Astron. Astrophys. 23, 249–257.
Liu, C-Y., Li, J., and Zhou, X-L.: 1999, ‘Study on “Double Dawn”’, Sci. China (A) 42, 1224–1232.
Lockyer, W. J. S.: 1927, ‘The Degree of Darkness during the Total Solar Eclipse of 1927 June 29’, Mon. Not. R. Astron. Soc. 88, 97–101.
Lovell, D. J.: 1953, ‘The Concept of Radiation Measurements’, Am. J. Phys. 21, 459–452.
Manohar, G. K., Kandalgaonkar, S. S., and Ramana-Murty, Bh. V.: 1985, ‘Anomalous Behaviour of Electric Field in the Neighbourhood of Totality of Solar Eclipse’, Indian J. Radio Space Phys. 14, 80–81.
Marriott, R. A.: 1999, ‘1927: A British Eclipse’, J. Br. Astron. Assoc. 109, 117–143.
Maske, S. J., Nand, K., Behere P. G., Kachare, S. D., Ghanekar, S. G., and Vaidehi, P.: 1982, ‘How Air Pollutant Behaved on the Day of the Solar Eclipse on 16 February 1980’, J. Meteorol. Dept. India 33, 133–134.
McCluney, W. R.: 1968, ‘Radiometry and Photometry’, Am. J. Phys. 36, 977–979.
Meeus, J.: 1982, ‘The Frequency of Total and Annular Solar Eclipses for a Given Place’, J. Br. Astron. Assoc. 92, 124–126.
Meyer-Arendt, J. R.: 1968, ‘Radiometry and Photometry: Units and Conversion Factors’, Appl. Opt. 7, 2081–2084.
Middleton, W. E. K.: 1952, Vision through the Atmosphere, University of Toronto Press, pp. 6–17.
Miller, R. E. and Fastie, W. G.: 1972, ‘Skylight Intensity, Polarization and Airglow Measurements during the Total Solar Eclipse of 30 May 1965’, J. Atmos. Terr. Phys. 34, 1541–1546.
Niranjan, K. and Thulasiraman, S.: 1998, ‘Aerosol Optical Depth and Size Distribution Changes during the Total Solar Eclipse of 24 October 1995’, Terr. Atmos. Oceanic Sci. 9, 255–262.
Peñaloza, M., M.A.: 1975, A Determination of the Local Circumstances of the Partial Solar Eclipse of 13 December 1974 from Photographic Observations, University of the Andes, Faculty of Science, Department of Physics, Mérida, Venezuela, Internal Report (in Spanish).
Peñaloza, M.,, M.A., 1999, ‘An Investigation of Aerosol Optical Properties: Atmospheric Implications and Influences’, Ph.D. Thesis, University of Essex, Colchester, UK, 365 pp.
Röhl, E.: 1932, ‘Partial Eclipse of the Sun of 31 August 1932’, Bol. Soc. Venezolana Ciens, Nat. No. 10, 393–397 (in Spanish).
Rosenberg, G. V.: 1966, Twilight: A Study in Atmospheric Optics, Plenum, New York, 160 pp.
Sapra, B. K., Mayya, Y. S., Sawant, V. D., and Nambi, K. S. V.: 1997a, ‘Aerosol Measurements at Trombay Relating to the 1995 Eclipse’, Curr. Sci. 72, 321–325.
Sapra, B. K., Sunny, F., Kulkarni, P. B., Mahadevan, T. N., and Pandit, G. G.: 1997b, ‘Atmospheric Characteristics at Trombay Relating to the October 1995 Solar Eclipse’, Kodaikanal Obs. Bull. 13, 161–166.
Schaefer, B. E.: 1986, ‘Atmospheric Extinction Effects on Stellar Alignments’, J. Hist. Astron. Suppl. (Archaeoastron.) 27, S32-S42.
Schaefer, B. E.: 1993, ‘Astronomy and the Limits of Vision’, Vistas Astron. 36, 311–361.
Schaefer, B. E.: 1998, ‘To the Visual Limits’, Sky Telesc. 95, 57–60.
Schove, D. J. and Fletcher, A.: 1987, Chronology of Eclipses and Comets-AD 1~1000, The Boyde Press, Suffolk, UK, 356 pp.
Sharp, W. E., Lloyd, J. W. F., and Silverman, S. M.: 1966, ‘Zenith Skylight Intensity and Color during the Total Solar Eclipse of 20 July 1963’, Appl. Opt. 5, 787–792.
Sharp, W. E., Silverman, S. M., and Lloyd, J. W. F.: 1971, ‘Summary of Sky Brightness Measurements during Eclipses of the Sun’, Appl. Opt. 10, 1207–1210.
Shaw, G. E.: 1975, ‘Sky Brightness and Polarization during the 1973 African Eclipse’, Appl. Opt. 14, 388–394.
Shaw, G. E.: 1978, ‘Sky Radiance during a Total Solar Eclipse: A Theoretical Model’, Appl. Opt. 17, 272–276.
Shaw, G. E.: 1979, ‘Sky Brightness during the 26 February 1979 Eclipse’, Appl. Opt. 18, 2362–2363.
Shiozaki, M., Koga, Y., Nakamura, H., Shimazaki, S., and Kojo, S.: 1999, ‘Variations in Daylight during Solar Eclipses’, in Proceedings of the CIE Session, CIE Publ. No. 133, Vol. 1, 267–271.
Sifontes, E.: 1920, ‘Meteorological Variations during an Eclipse-The Annular Eclipse of the Sun of 22 November 1919, Seen in Bolivar City, (Venezuela) SA, as a Partial Eclipse’, in Contributions to the Study of the Tropical Climatology in the South Zone of the Orinoco River, Part 3, Ciudad Bolivar, Venezuela, pp. 34–36 (in Spanish).
Silverman, S. M. and Mullen, E. G.: 1974, Sky Brightness during Eclipses: A Compendium from Literature, AFCRL-TR–74–0363, Special Report No. 180, Hanscom USAFB, Massachusetts, 196 pp.
Silverman, S. M. and Mullen, E. G.: 1975, ‘Sky Brightness during Eclipses: A Review’, Appl. Opt. 14, 2838–2843.
Singh, A. K., Nivas, S., Kumar, A., Rai, J., and Nigam, M. J.: 1999, ‘Variations in Atmospheric Aerosols and Electric Conductivity at Roorkee during the Total Solar Eclipse of October 1995’, Indian J. Radio Space Phys. 28, 1–10.
Stenz, L. E.: 1929, 'Radiation solaire à l'opacité atmosphérique pendant l'éclipse du soleil du 29.VI.1927 à Jokkmokk, Gerlands Beitr. Geophysik. XXI, 270–289.
Stephenson, F. R.: 1992, ‘A Re-Investigation of the “Double Dawn” Event Recorded in the Bamboo Annals’, Quart. J. Roy. Astron. Soc. 33, 91–98.
Tang, N. I.: 1996, ‘Chemical and Size Effects of Hygroscopic Aerosols on Light Scattering Coefficients’, J. Geophys. Res. 101D, 19245–19250.
Taylor, B. J., Lucke, P. B., and Laulainen, N. S.: 1977, ‘Analyses of Atmospheric Extinction Data Obtained by Astronomers-I. A Time-Trend Analysis of Data with Internal Accidental Errors Obtained at Four Observatories’, Atmos. Environ. 11, 1–20.
Ugueto, L.: 1916, The Total Solar Eclipse of 3 February 1916 in Venezuela, Ministry of Public Instruction-Cagigal Observatory, Litografía Comercio, Caracas, 42 pp. (in Spanish).
USNO: 1939, Total Eclipse of the Sun-October 1, 1940 (Supplement to the American Ephemeris, 1940). The US Nautical Almanac Office-US Naval Observatory (USNO), Washington, D.C., 57 pp.
Velasquez, D. A.: 1971, ‘Zenith Sky Brightness and Color Change during the Total Solar Eclipse of 12 November 1966 at Santa Inés, PerÚ’, Appl. Opt. 10, 1211–1214.
Young, A. T.: 1990, ‘How We Perceive Star Brightness’, Sky Telesc. 79, 311–313.
Zirker, J. B.: 1995, Total Eclipses of the Sun, Princeton University Press, 134 pp.
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Peñaloza-Murillo, M.A. Optical Response of the Atmosphere During the Caribbean Total Solar Eclipses of 26 February 1998 and of 3 February 1916 at Falcón state, Venezuela. Earth, Moon, and Planets 91, 125–159 (2002). https://doi.org/10.1023/A:1022417600232
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DOI: https://doi.org/10.1023/A:1022417600232