Abstract:
The present work is concerned with a peculiar vertical temperature distribution
that sometimes develops over the ground during calm and clear nights. After sun-
set, typically an inversion pro¯le is expected to form, in which a minimum in the
vertical temperature pro¯le occurs at the ground. However, on calm and clear
nights, a temperature pro¯le often develops, where the minimum of temperature
occurs a few decimeters above the ground. This phenomenon, ¯rst reported by the
Indian agro-meteorologist Ramdas in 1932, is identi¯ed by various names like `The
Lifted Temperature Minimum', `The Elevated Temperature Minimum', `The Ram-
das E®ect', etc. The lifted minimum is characterized by its height and intensity,
the height of the minimum simply being the height above the ground at which the
minimum occurs, while the intensity of the minimum is the di®erence between the
ground temperature and the minimum temperature.
