cutting South America loose

As noted by Michael Marshall in New Scientist, we could relink the Pacific and Atlantic Oceans: Destroying the Isthmus of Panama, the slender strip of land that joins North and South America, would reunite the Pacific and Atlantic oceans.

Underground nuclear explosions would do the trick. With the land gone, the ocean current that once flowed around the equator would restart and, allegedly, stabilise the climate.

Marshall also says we could flood the planet’s vast depressions, such as the Qattara depression in north-west Egypt and California’s Death Valley.

This could serve multiple purposes, including the creation of new bodies of water, the generation of hydroelectricity, and as a means to offset rising sea levels from global warming.

But on that last point, and as Marshall points out: “[It] is not worth doing for this reason alone: even if we flooded all of the world’s major depressions, it would barely make a difference.”

io9.gizmodo, 4 Aug 2015

see also – action plan