Douglas Harper's Etymology Dictionary
Wiktionary
n. 1 An upward movement from a lower source. 2 the oceanographic phenomenon that occurs when strong, usually seasonal, winds push water away from the coast, bringing cold, nutrient-rich deep waters up to the surface
Wikipedia
Upwelling is an oceanographic phenomenon that involves wind-driven motion of dense, cooler, and usually nutrient-rich water towards the ocean surface, replacing the warmer, usually nutrient-depleted surface water. The nutrient-rich upwelled water stimulates the growth and reproduction of primary producers such as phytoplankton. Due to the biomass of phytoplankton and presence of cool water in these regions, upwelling zones can be identified by cool sea surface temperatures (SST) and high concentrations of chlorophyll-a.
The increased availability in upwelling regions results in high levels of primary productivity and thus fishery production. Approximately 25% of the total global marine fish catches come from five upwellings that occupy only 5% of the total ocean area. Upwellings that are driven by coastal currents or diverging open ocean have the greatest impact on nutrient-enriched waters and global fishery yields. __TOC__
Usage examples of "upwelling".
Pacific, somewhere between San Francisco and Hawaii, the sea was a weird goulash of currents, streams of cold stuff coming up from the Antarctic and coolish upwelling spirals out of the ocean floor and little hot rivers rolling off the sun-blasted continental shelf far to the east.
There was nowhere else for Pop Yaffe to go, so he kept boring in, and the shock wave of the blast rocked the B-25 as it passed overhead and everyone inside had that gruesome moment of smelling the upwelling smoke and fumes from the airplane that was even at that instant incinerating their close friends.
Its energy was small compared to the zonal upwellings, but far more concentrated.
In the deepest part of her brutal incision the hollow irregular mastoid cells were larger, and Sanger perceived a larger cavity the size of her fingertip before upwelling gore from surrounding tissue blocked her view.
It was most comfortable in a range between 40 and 55 degrees Fahrenheit, and as it drifted with the currents and encountered thermoclines and upwellings that warmed or cooled the water, it moved up or down.
Upwelling magma lifted a fantastic variety of ancient rock to the top of the Spine, so that every imaginable landform can be found there.
State-of-the-art Khumalo combat biotech runs some charming custom extras, notable among them a serotonin shutout system that improves your capacity for mindless violence and minute scrapings of wolf gene that give you added speed and savagery together with an enhanced tendency to pack loyalty that hurts like upwelling tears.
Not by means of simple evaporation or from being blown out into space due to some inexplicable internal cataclysm, but in response to a powerful unknown force that was sucking clouds, upwellings, and entire storm systems inexorably downward.
More than a wave, but a great columnar upwelling that took within itself the power of many waves.
And the old broken aquifers had refilled, from the Tharsis upwelling and all the heat and outgassing that that engendered.
Jets and upwellings from coriolis and compressional heating made the first thin kilometer of air tricky.
The torrent of music and trained voices poured over Honor in a magnificent tide which seemed to simultaneously focus and amplify the upwelling cyclone of the emotions all about her as the procession advanced down the cathedral's nave behind the crucifers and thurifers.
The torrent of music and trained voices poured over Honor in a magnificent tide which seemed to simultaneously focus and amplify the upwelling cyclone of the emotions all about her as the procession advanced down the cathedral’s nave behind the crucifers and thurifers.
There's evidence that it was caused by an upwelling of basaltic magma in the fairly recent geological past.
Just a deep circulating convection current of explanation, a causal magma upwelling from the underworld and then plunging down again into darkness, churning from TOE to body to mind to TOE-held up by nothing but the engine of understanding.