Decreases in shelter temperature during eclipse events were quantified on the basis of observations, numerical model simulations, and complementary conceptual evaluations. Observations for the annular eclipse on 10 May 1994 over the United States are presented, and these provide insights into the temporal and spatial changes in the shelter temperature. The observations indicated near-surface temperature drops of as much as 6°C. Numerical model simulations for this eclipse event, which provide a complementary evaluation of the spatial and temporal patterns of the temperature drops, predict similar decreases. Interrelationships between the temperature drop, degree of solar irradiance reduction, and timing of the peak eclipse are also evaluated for late spring, summer, and winter sun conditions. These simulations suggest that for total eclipses the drops in shelter temperature in midlatitudes can be as high as 7°C for a spring morning eclipse.

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Footnotes

*Agricultural Meteorology, Department of Agronomy, Iowa State University, Ames, Iowa.

+Department of Geological and Atmospheric Sciences, Iowa State University, Ames, Iowa.

#Department of Mechanical Engineering, Iowa State University, Ames, Iowa.

@Department of Zoology and Genetics, Iowa State University, Ames, Iowa.

&Department of Atmospheric Science, Colorado State University, Fort Collins, Colorado.