Thermophysics

Earth thermophysics is a branch of geophysics that uses the naturally occurring surface temperature as a function of the cyclical variation in solar radiation to characterise planetary material properties.

Thermophysical properties are characteristics that control the diurnal, seasonal, or climatic surface and subsurface temperature variations (or thermal curves) of a material. The most important thermophysical property is thermal inertia, which controls the amplitude of the thermal curve and albedo (or reflectivity), which controls the average temperature.

This field of observations and computer modeling was first applied to Mars due to the ideal atmospheric pressure for characterising granular materials based upon temperature.{{sfnp|Wechsler|Glaser|1965}} The Mariner 6, Mariner 7, and Mariner 9 spacecraft carried thermal infrared radiometers,{{sfnp|Neugebauer et al.|1971}}{{sfnp|Kieffer et al.|1973}} and a global map of thermal inertia was produced from modeled surface temperatures{{sfnp|Kieffer et al.|1977}} collected by the Infrared Thermal Mapper Instruments (IRTM) on board the Viking 1 and 2 Orbiters.

The original thermophysical models were based upon the studies of lunar temperature variations.{{sfnp|Wesselink|1948}}{{sfnp|Jaeger|1953}} Further development of the models for Mars included surface-atmosphere energy transfer,{{sfnp|Leovy|1966}} atmospheric back-radiation,{{sfnp|Neugebauer et al.|1971}} surface emissivity variations,{{sfnp|Kieffer et al.|1973}} CO₂ frost and blocky surfaces,{{sfnp|Kieffer et al.|1977}} variability of atmospheric back-radiation,{{sfnp|Haberle|Jakosky|1991}} effects of a radiative-convective atmosphere,{{sfnp|Hayashi et al.|1995}} and single-point temperature observations.{{sfnp|Jakosky et al.|2000}}{{sfnp|Mellon et al.|2000}}

{{Reflist}}

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Category:Geophysics