advectionn.
/adˈvɛkʃn/, /ədˈvɛkʃn/, U.S. /ædˈvɛkʃ(ə)n/ 1. Medicine. Growth (of new blood vessels) towards a stimulus; (also) transport (by blood vessels) towards a part of the body. rare. Now disused.
ΚΠ
1896 Trans. Pathol. Soc. Philadelphia 17 49 It is possible, according to the views of Metchnikoff and of Leber, that the advection, if not the primary formation of new bloodvessels in the healing of wounds, is entirely under the influence of the chemotactic or a similar force.
1900 D. H. Goodsall & W. E. Miles Dis. Anus & Rectum I. iii. 59 In the interval between the receipt of the injury and the appearance of the abscess, some depressed condition of the constitution occurred, which permitted the advection, through the blood stream, of the infective agent to the damaged tissue.
2.
a. Meteorology. The transfer of heat, energy, etc., by the (esp. horizontal) movement of air in the atmosphere; such movement itself. Cf. convection n.
ΘΚΠ
the world > the earth > weather and the atmosphere > movements and pressure conditions > [noun] > specific movements
eddy1815
air drainage1872
outflow1887
divergence1906
advection1910
1910 Rep. Brit. Assoc. Advancem. Sci. 1909 103 Interchange of air in the upper region would be mainly by advection and the two [upper and lower] regions might be appropriately named advective and convective regions.
1934 Sci. Monthly Sept. 233/1 Horizontal mass movement, or advection north and south, of layers of air.
1967 R. W. Fairbridge Encycl. Atmospheric Sci. & Astrogeol. 3/1 The distinction between convection and vertical advection is commonly a matter of scale.
1984 New Scientist 13 Sept. 34/1 A number of important factors such as horizontal advection of heat.
2005 M. B. Kirkham Princ. Soil & Plant Water Relations xxvi. 460 The period of strong regional advection of sensible heat into eastern Nebraska during May, 1967.
b. Chiefly Oceanography. Any such transfer of heat, energy, etc., by the (typically horizontal) movement of a fluid, esp. in the ocean.
ΘΚΠ
the world > the earth > water > sea or ocean > [noun] > large-scale motion in
advection1938
Langmuir circulation1963
Ekman transport1967
1938 Jrnl. Marine Res. 1 171 Heat (and fresh water) may be supplied or withdrawn from a region by advection of different water masses.
1975 Nature 30 Oct. 748/1 Within the continental tectosphere..the dominant mechanism of heat transport is conduction, not advection.
1992 M. T. Landahl & E. Mollo-Christensen Turbulence & Random Processes Fluid Mech. (ed. 2) x. 136 Another effect is that of sound advection by the mean flow in the jet.
2002 P. Herring Biol. Deep Ocean iv. 88 Vertical advection is most apparent in the winter wind-mixing of the upper few hundred metres of the water column.
Compounds
advection fog n. Meteorology fog formed when warm, moist air passes over a colder surface of land or ocean, causing the air to be cooled to its dew point and allowing water vapour to condense.
ΚΠ
1918 W. J. Humphreys in Jrnl. Franklin Inst. 185 612 According to the conditions under which they are formed, fogs may be divided into two general classes—radiation fogs and advection fogs.
1973 Pop. Sci. Feb. 78 Advection fogs are common at sea when warm moist air comes in contact with cold ocean currents.
2006 G. Pretor-Pinney Cloudspotter's Guide iii. 84 ‘Steam fog’ appears when cold air flows over warm water (the opposite of advection fog).
This entry has been updated (OED Third Edition, December 2011; most recently modified version published online December 2021).
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