Groundswell (Parts
Groundswell may refer to: * Swell (ocean), a type of ocean wave Music * ''Groundswell'' (album), a 2003 album by Parts & Labor, or its title song * Three Days Grace or Groundswell, a Canadian rock band * Groundswell, a band created by Jonn Penney Other uses * ''Ground Swell'', a 1939 painting by Edward Hopper * Groundswell (organization), a non-profit organization based in Washington, D.C. * ''Groundswell'' (book), a 2008 book by Charlene Li and Josh Bernoff * '' Groundswell: The Second Diva Book of Short Stories'' * Groundswell group, a political action group * Groundswell NZ Groundswell NZ is a farming advocacy group in New Zealand that was formed to oppose the New Zealand Government's National Policy Statement on Freshwater. The group has also sought to oppose or revise freshwater, indigenous biodiversity, climate ...

Swell (ocean)
A swell, also sometimes referred to as ground swell, in the context of an ocean, sea or lake, is a series of mechanical waves that propagate along the interface between water and air under the predominating influence of gravity, and thus are often referred to as surface gravity waves. These surface gravity waves have their origin as wind waves, but are the consequence of dispersion of wind waves from distant weather systems, where wind blows for a duration of time over a fetch of water, and these waves move out from the source area at speeds that are a function of wave period and length. More generally, a swell consists of wind-generated waves that are not greatly affected by the local wind at that time. Swell waves often have a relatively long wavelength, as short wavelength waves carry less energy and dissipate faster, but this varies due to the size, strength, and duration of the weather system responsible for the swell and the size of the water body, and varies from event to ...
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