Surface inversion
From Glossary of Meteorology
surface inversion
(
Or ground inversion.) A temperature inversion based at the earth's surface; that is, an increase of temperature with height beginning at the ground level.
Or ground inversion.) A temperature inversion based at the earth's surface; that is, an increase of temperature with height beginning at the ground level.
This condition is due primarily to greater radiative loss of heat at and near the surface than at levels above. Thus, surface inversions are common over land prior to sunrise and in winter over high-latitude continental interiors.