Abstract
Some trends in the composition of the lower solar corona due to mixing and diffusion have been examined. Mixing has been treated through plausible inference from the thermal gradient and through analogy with the neutral atmosphere of the earth. These indicate that diffusion may be important in the lower corona. Changes in composition due to pressure and thermal gradients have been calculated with multi-component diffusion equations. Results indicate that (i) large enhancements of heavy elements are possible and (ii) the composition of the corona can show large variations with values of the thermal gradient in the lower corona.
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Nakada, M.P. A study of the composition of the lower solar corona. Sol Phys 7, 302–320 (1969). https://doi.org/10.1007/BF00224909
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DOI: https://doi.org/10.1007/BF00224909