advection
/ədˈvɛkʃ(ə)n
/noun [mass noun]
The transfer of heat or matter by the flow of a fluid, especially horizontally in the atmosphere or the sea.The first is due to initial conductive cooling; in the second, heat advection is controlled by fluid circulation....
- A spectacular form of heat advection occurs when molten rock, or magma, erupts from a volcano.
- There are two processes that change: advection (i.e. transport of the water vapour by the air flow) diffusion (i.e. spreading out by molecular effects)
Derivatives
advect
- However, the general circulation in the Santa Barbara Channel tends to be cyclonic, which often advects cool surface waters eastward along the northern coasts of the Channel Islands.
- As a result of this, in the northern hemisphere, polar air in the lower troposphere is frequently advected into middle latitudes and, occasionally, even as far as subtropical latitudes.
- This moisture can be advected to the coast to feed storms and tornadoes.
advective
- When dissolved solids are carried along with the flowing groundwater, the process is called advective transport or convection.
- During summer, vertical advective processes appear to be limited to the upper 200 m, where upwelling in the open water leads to a doming structure.
- Despite the thickness of this relatively stagnant water mass of more than 1000 m, the water age (time since last contact with the atmosphere) is only slightly more than a decade, indicating large-scale advective exchange.
Origin
Early 20th century: from Latin advectio(n-), from advehere 'bring', from ad- 'to' + vehere 'carry'.