Occasionally, a layer of cool air forms under a layer of warmer air in the troposphere, which is different from the normal conditions.
this change from the normal temperature profile in the troposphere is called a

a) temperature or thermal subversion
b) cold front
c) tornado
d) thunderstorm
e) temperature or thermal inversion

Extensive and unusual cold snaps have occurred here recently. is this evidence that global warming is lessening or not occurring? no—although the long-term trend is for warming, short-term weather patterns can still be variable. no—melting of glaciers and ice caps is making the oceans cooler, which can cause cold snaps. yes-- if global warming really were occurring, cold snaps wouldn’t happen. yes—due to global warming, weather patterns should be become less—not more—variable.