standard atmosphere
1
6.1
- noun
- /ˈstændərd æθˌmɒsfɪr/
- Specialized
:
atmósfera estándar
- Engineers use a standard atmosphere as a baseline for calibrating instruments in atmospheric studies.
Examples
-
We use the standard atmosphere definition to define ? as a function of altitude.
Blog text (11) -
The table below represents a standard atmosphere (see U.S. Standard Atmosphere).
Blog text (11) -
Standard atmosphere
Blog text (11) -
We take the data and standard atmosphere and interpolate to express pressure (p) and temperature (T) as functions of the altitude.
Blog text (11) -
There is no 'runaway' GE on Venus; the temperature at various pressure levels conforms to the profile of the 'standard atmosphere.'
Blog text (18) -
The pressure at sea level is defined as one standard atmosphere, which is equivalent to 101,325 pascals.
-
When flying at cruising altitude, the cabin is pressurized to maintain a comfortable level of one standard atmosphere.
Synonyms
12
6.8
A unit of pressure equal to normal air pressure at sea level
1
4.0
A unit for measuring pressure equal to the air pressure at sea level
The pressure at sea level used as a reference equal to a 760 mm column of mercury at zero Celsius
How High
- Specialized
1
8.1
- Specialized
42
6.4
- Specialized
1
6.1
- Specialized
7
4.0
- Specialized
9
5.5
- Specialized
77
4.2
Surface Forms
Morphology
The phrase combines 'standard' (an accepted benchmark) with 'atmosphere' (a pressure unit) to mean the standardized value of atmospheric pressure, so the overall meaning is directly inferable from its parts. This compositional pattern (modifier + technical noun) is common in English and other languages, so a B1 learner who knows both constituents would readily understand the term.
Etymology
Standard atmosphere comes from scientists choosing one simple reference for air pressure: the pressure that supports a column of mercury 760 millimetres high at sea level and zero degrees Celsius. They used this clear, physical image so people could easily compare pressures, so 'one standard atmosphere' became the common value for air pressure at sea level.