To what does 6.4 C ° /1000 m refer?

Question

BlackTom AI · Accepted Answer

The question asks about the meaning of 6.4 C ° /1000 m, which is a rate related to temperature change with altitude.
Option 1: 'An environmental lapse rate.' While the lapse rate can refer to the decrease of temperature with height, the specific numeric value 6.4 C per 1000 m is more precisely described as a normal or standard lapse rate rather than a general environmental one, which can vary with conditions.
Option 2: 'A measure of air pressure.' This is incorrect because temperature change with altitude is not a measure of pressure; pressure decreases with height, but the value given relates to temperature lapse, not pressure.
Option 3: 'The normal lapse rate.' This is the standard, commonly cited rate of temperature decrease with altitude in the troposphere, approximately 6.4 C per 1000 meters, which aligns with the commonly used environmental or standard lapse rate in certain contexts.
Option 4: 'A latitudinal lapse rate.' A latitudinal lapse rate would describe how variables change with latitude, not with altitude; the given rate explicitly involves meters of altitude, so this option is inconsistent with the concept of lapse rate as a vertical gradient.

To what does 6.4 C ° /1000 m refer?

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