air massn.

Brit.

/ˈɛː mas/, U.S.

/ˈɛr ˌmæs/

Origin: Formed within English, by compounding; modelled on a German lexical item. Etymons: air n.¹, mass n.²

Etymology: < air n.¹ + mass n.², perhaps after German Luftmasse (beginning of the 19th cent. or earlier). Compare French masse d'air (end of the 17th cent. or earlier).

Meteorology.

A body of air; spec. (in later use) one of broadly uniform temperature, pressure, and humidity.

ΘΚΠ

the world > the earth > weather and the atmosphere > movements and pressure conditions > [noun] > uniform body of air

air mass1870

1870 R. A. Proctor tr. J. Zöllner in Sun & Life of Planetary Syst. v. 307 We recollect that the forms of our clouds must be supposed to depend,..(essentially) only on the mode in which air-masses, variously warmed and moved, expand.

1893 F. Waldo Mod. Meteorol. iv. 318 If a swiftly moving air mass moves into a quiet mass of air, then the resistance is considerable.

1920 Geografisker Annaler 2 250 We, knowing the temperature at which an airmass starts wish to know the rate of its cooling or warming in passing over surfaces of land or water.

1942 W. G. Kendrew Weather xii. 65 Air mass is the term applied to a part of the atmosphere large enough to play an appreciable part for a period of at least some hours in the meteorology of any region.

1982 R. G. Barry & R. J. Chorley Atmosphere, Weather & Climate (ed. 4) v. 198 The influence of maritime air masses can extend deep into Europe because there are few topographic barriers to airflow.

2002 Chicago Tribune 13 Jan. iv. 8/4 In contrast some of the driest snows fall in ‘clipper’ type storms that race southeast in an arctic air mass.

This entry has been updated (OED Third Edition, June 2008; most recently modified version published online December 2021).

单词	air mass
释义	air massn. Brit. /ˈɛː mas/, U.S. /ˈɛr ˌmæs/ Origin: Formed within English, by compounding; modelled on a German lexical item. Etymons: air n.¹, mass n.² Etymology: < air n.¹ + mass n.², perhaps after German Luftmasse (beginning of the 19th cent. or earlier). Compare French masse d'air (end of the 17th cent. or earlier). Meteorology. A body of air; spec. (in later use) one of broadly uniform temperature, pressure, and humidity. ΘΚΠ the world > the earth > weather and the atmosphere > movements and pressure conditions > [noun] > uniform body of air air mass1870 1870 R. A. Proctor tr. J. Zöllner in Sun & Life of Planetary Syst. v. 307 We recollect that the forms of our clouds must be supposed to depend,..(essentially) only on the mode in which air-masses, variously warmed and moved, expand. 1893 F. Waldo Mod. Meteorol. iv. 318 If a swiftly moving air mass moves into a quiet mass of air, then the resistance is considerable. 1920 Geografisker Annaler 2 250 We, knowing the temperature at which an airmass starts wish to know the rate of its cooling or warming in passing over surfaces of land or water. 1942 W. G. Kendrew Weather xii. 65 Air mass is the term applied to a part of the atmosphere large enough to play an appreciable part for a period of at least some hours in the meteorology of any region. 1982 R. G. Barry & R. J. Chorley Atmosphere, Weather & Climate (ed. 4) v. 198 The influence of maritime air masses can extend deep into Europe because there are few topographic barriers to airflow. 2002 Chicago Tribune 13 Jan. iv. 8/4 In contrast some of the driest snows fall in ‘clipper’ type storms that race southeast in an arctic air mass. This entry has been updated (OED Third Edition, June 2008; most recently modified version published online December 2021). < n.1870
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