Molecular Scale Temperature

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Molecular Scale Temperature

(symbol TM 

) </dt>
An atmospheric parameter defined by T_M = (M₀ / M)T where M₀ is the mean molecular weight at sea level, M is the mean molecular weight at altitude, and T is air temperature at altitude. </dd>
Up to an altitude of about 90 kilometers, the molecular composition of air is constant; thus M₀ / M = 1 and T _M = T. Above 90 kilometers, M₀ / M is greater than unity, and T _M is greater than T. [[/a>|/a> ]]

References

This article is based on NASA's Dictionary of Technical Terms for Aerospace Use