| Nature-based Ocean and Atmospheric Cooling Techniques | References |
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| Short Description | Thickening ice tends to increase its longevity and its albedo (reflectiveness), both of which cool the planet. Pumping seawater onto sea ice may also brighten surfaces darkened by the deposition of soot, dust or organisms. | | Description | As ice thickens typically from its base, and ice is itself a good insulator, sea ice thickening rapidly tails off as the ice thickens. The thickening rate can be increased if water or seawater is pumped onto existing ice, and is therefore in contact with the typically much colder atmosphere and is further increased by wind chill. As brine freezes at a lower temperature than does seawater, the freezing rate can be increased still further: by allowing a rejected portion of brine to flow off a conical ice surface back into the sea; by using intermittent pumping; and by engineering only a shallow depth of pumped seawater. | |
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