Assertion: ozone | /r/CapableOf | stay at one level
Facets:
value: generally
type: DEGREE
Source sentences:
text: Generally ozone stays at one level or the other, but occasionally, stratospheric ozone can be dragged down to the surface when the boundary that marks the shift from the warm air of the stratosphere to the cooler air of the troposphere (called the tropopause) rapidly jumps upward from its normal 8 to 10 kilometer (5 to 6.2 mile) height above the surface, a new study detailed in the Nov. 8 issue of the journal Nature finds.