Abstract
The parameters of geophysical fields and numerous parameters of the Earth–atmosphere–ionosphere–magnetosphere system significantly change during a solar eclipse (SE). In particular, the planet surface temperature decreases, the convection and turbulent processes slow down, and the air temperature near the ground reduces. The inhomogeneous structure of the surface air layer notably changes, and the role of temperature fluctuations in this layer and, consequently, the role of fluctuations in the air refractive index shrink. The purposes of this work are to analyze the observations of solar limb quivering during the two last partial SE that took place near the city of Kharkiv on March 20, 2015, and June 10, 2021, and the estimates of the statistical parameters governing air convection. The SE effects in the surface air layer were observed with the optical AFR-2 chromospheric-photospheric telescope at the V.N. Karazin Kharkiv National University Astronomical Observatory 70 km to southeast of Kharkiv. The quivering of the solar limb was measured on the days of SEs (March 20, 2015, and June 10, 2021) and on the reference days in order to determine the basic parameters of the atmospheric convection. The variations in the convection parameters are qualitatively similar to variations in illumination of the Earth’s surface and in the air temperature in the surface air layer. In the summertime, all convection parameters are a factor of ~2 higher than in the springtime. The SE effect on atmospheric convection was considerably weaker on June 10, 2021, than on March 20, 2015, because of insignificant magnitude of the former SE (0.11 vs. 0.54) and the clouds which screened the solar disk, which appreciably suppressed atmospheric convection. The comparative study of convection during seven SEs in 1999–2021 has shown that the magnitude of the effect strongly depends on the season, local time, cloud thickness, the tropospheric weather, and the magnitude of a solar eclipse.
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REFERENCES
L. A. Akimov, E. I. Grigorenko, V. I. Taran, O. F. Tyrnov, and L. F. Chernogor, “Complex radar and optical studies of dynamic processes in the atmosphere and geospace, related to the solar eclipse of August 11, 1999,” Zarub. Radioelektron. Usp. Sovrem. Radioelektron., No. 2, 25–63 (2002).
L. A. Akimov, E. I. Grigorenko, V. I. Taran, and L. F. Chernogor, “The features of atmosphere and ionosphere effects of May 31, 2003 solar eclipse: Optical and radiophysical observations results in Kharkiv,” Usp. Sovrem. Radioelektron., No. 3, 55–70 (2005).
L. A. Akimov, V. K. Bogovskii, E. I. Grigorenko, V. I. Taran, and L. F. Chernogor, “Atmospheric–ionospheric effects of the solar eclipse of May 31, 2003, in Kharkov,” Geomagn. Aeron. (Engl. Transl.) 45, 494–518 (2005).
A. L. Akimov, L. A. Akimov, and L. F. Chernogor, “Turbulence parameters in the atmosphere associated with solar eclipses,” Radiofiz. Radioastron. 12, 117–135 (2007).
A. L. Akimov and L. F. Chernogor, “Effects of the solar eclipse of August 1, 2008 on the Earth’s lower atmosphere,” Kinematics Phys. Celestial Bodies 26, 135–145 (2010).
S. F. Clifford, “The classical theory of wave propagation in a turbulent medium,” in Beam Propagation in the Atmosphere, Ed. by J. W. Strohbehn (Springer-Verlag, Berlin, 1978; Mir, Moscow, 1981), pp. 9–43.
I. G. Kolchinskii, Optical Instability of the Earth’s Atmosphere from Observations of Stars (Naukova Dumka, Kiev, 1967) [in Russian].
V. P. Lukin, “Correction of random angular displacements of optical beams,” Sov. J. Quantum Electron. 7, 1270–1279 (1980). https://doi.org/10.1070/QE1980v010n06ABEH010279
A. S. Monin and A. M. Yaglom, Statistical Fluid Mechanics. Mechanics of Turbulence, (Nauka, Moscow, 1965; Massachusetts Inst. of Technology Press, Cambridge, Mass., 1971), Vol. 1; A. S. Monin and A. M. Yaglom, Statistical Fluid Mechanics. Mechanics of Turbulence (Nauka, Moscow, 1967; Massachusetts Inst. of Technology Press, Cambridge, Mass., 1975), Vol. 2.
V. I. Tatarskii, Wave Propagation in a Turbulent Medium (Nauka, Moscow, 1967; Dover, New York, 1967).
L. F. Chernogor, “Effects of solar eclipses in the surface atmosphere,” Izv., Atmos. Ocean. Phys. 44, 432–447 (2008).
L. F. Chernogor, “Dynamic processes in the near-ground atmosphere during the solar eclipse of August 1, 2008,” Izv., Atmos. Ocean. Phys. 47, 84–95 (2011).
L. F. Chernogor, Physical Effects of Solar Eclipses in Atmosphere and Geospace: Monograph (Khark. Nats. Univ. im. V. N. Karazina, Kharkiv, 2013) [in Russian].
L. F. Chernogor, “Atmosphere–ionosphere response to solar eclipse over Kharkiv on March 20, 2015,” Geomagn. Aeron. (Engl. Transl.) 56, 592–603 (2016).
Funding
The work was supported by the Ukraine National Research Foundation (project 2020.02/0015 “Theoretical and Experimental Study of Global Perturbations of Natural and Anthropogenic Origin in the Earth–Atmosphere–Ionosphere System”) and by the Ministry of Education and Science of Ukraine (state assignment nos. 0119U002538, 0121U109881, and 0121U109882).
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Translated by O. Ponomareva
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Chernogor, L.F. Convection Effect in the Surface Atmosphere of Solar Eclipses of March 20, 2015, and June 10, 2021. Kinemat. Phys. Celest. Bodies 37, 284–292 (2021). https://doi.org/10.3103/S0884591321060039
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DOI: https://doi.org/10.3103/S0884591321060039