The occurence of large temperature differences spells bad news, as they can trigger methane releases, the more so as wide and rapid temperature changes on Antarctica look set to become even more frequent and intense with further global warming. (geoengineeringwatch.org)
These phenomena develop along the polar front, which separates colder polar air from warmer tropical air, when sufficiently large temperature differences occur across the frontal boundary in the lower troposphere. (britannica.com)
This means that the higher temperature of the earth surface results in larger temperature difference between the earth surface and the top of the troposphere. (judithcurry.com)