Transmat World: Climate Change Will Herald the Age of Island Cities

Courtesy The Seasteading Institute and Gabriel Scheare, Luke & Lourdes Crowley, and Patrick White (Roark 3D)

Maybe you haven't heard of the Seasteading Institute. Their idea is to create ocean-going island cities with separate laws and governance from the rest of the world; more for sociopolitical reasons than practical. Little do they know they are ahead of the curve on what will be a major trend in the future.

Accurate ice core readings now show the atmosphere has more CO2, way more, than at any time in the past 800,000 years. Less accurate but 95% reliable are studies showing the last time CO2 levels were this high was during the Miocene 15 million years ago.

As our world heats up due to the unrelenting rise in atmospheric CO2 levels, it will begin to resemble the Miocene era.

You will find arguments that since average temperatures were much higher (5-8 degrees Centigrade higher) along with sea levels (130 feet higher) during the Miocene, there is no correlation with our current situation since we are not seeing those conditions. Those CO2 changes in the Miocene took place over a period of thousands of years. Ours has taken place over just the last 250 years.

If climate change were a light bulb, we have flipped the switch and are living in that geological microsecond the bulb filament is glowing a faint red. We are wondering why the light does not come on, but it did. It will get brighter at it's geological pace. Humanity is handicapped by not being able to visualize clearly the scale of really big things, be it time or space or the thermal inertia of a planet. Plus, we want patience and we want it now.

What the hell does this have to do with island cities? As that light bulb gets brighter, the planet’s oceans will become the most pleasant, practical places to live over the next century or so. When they talk about the seas becoming warm and too acidic, they are talking about the uppermost layer of the ocean called the Epipelagic Zone, also known as the Sunlight zone. Towards the lower boundaries of this zone is a thermocline that is a demarcation of warm, mixed upper sea water and frigid, stratified deeper sea water. Ninety percent of the ocean is below the thermocline and is 32-37 degrees F. This means if you lived on the ocean in 2100 A.D. you could be as few as a hundred meters away from a precious commodity in a hot and getting hotter world—the coolest liquid on the planet.

What can you do with it? You can pump it through the water side of a water/air heat exchanger, blow hot moist ambient air (there will be plenty of that) through the air side of the exchanger and collect the condensate off the coil for one of the cheapest ways to produce large quantities of fresh water known to man; cheap enough to use for farming. Use the cool air produced as a byproduct of this process to air condition living quarters and refrigerate food. This would eliminate the hydrofluorocarbons typically used in air conditioning. They are some of the worst greenhouse gasses around as far as potency; 1,430 times worse than CO2 per unit mass.

But wait! There’s more! That cold seawater your pumping can go into a large fish tank as it leaves the heat exchanger. It is full of nutrients and, because of its temperature, can hold a lot of oxygen, unlike the warm acidic water surrounding the island city. Many species of fish and shellfish may be saved from extinction by being raised in such tanks. This will also serve as a major source of food for the island city. The still cool overflow from the fish tanks will be dumped into the warm surrounding water, forming oases for wild organisms following the island around. With enough island cities and given enough time, this cool water from the depths may begin to help cool off the planet, assuming CO2 emissions are under control. It puts a whole new spin on the idea of deep-sea fish farming.

These island cities may be built with modules—habitat, water, plant farming, fish farming, solar power, wind power, manufacturing, harbor, recreation, etc.—linked together to form a large floating mat of functional habitability. Or they could be like huge, sail-driven cruise ships specially built to be self-sustaining. I can also see where they would run the gamut from well-planned and custom engineered to an old freighter with attendant sea barges roped to it a la Waterworld.

The engineered island cities will make excellent platforms for exploring the depths of the oceans for minerals, metals, and scientific studies. They will trade with other cities and whatever ports are still functioning to form a network of civilization the likes of which the world has never seen.

There are other reasons living on a floating island city may become a much better option than living on land in the future. For many, living on land will be a scramble to stay ahead of rising seas and ever hotter middle latitudes. There is evidence that equatorial regions may have been uninhabitable by living creatures during the hottest parts of the Eocene, another time period when temperatures rose along with an increase in CO2 due to major volcanic eruptions. This may cause a migration of humanity and animals on a previously unimagined scale, causing strife and conflict between haves and have nots. Many people will look to the sea for a less stressful life.

One could get a taste of this lifestyle by simply going to work on a cruise ship or going for an extended cruise. It's only about $45,000 for a year’s cruise. That would certainly be cheaper than buying a cabin on The World cruise liner for 13.5 million dollars. Probably would not be the same. They won't put you to work wiping off solar panels, gutting fish, or harvesting crops on a cruise ship. I wouldn’t, however, count on living at sea becoming a necessity in the immediate future. That light bulb filament won’t be orange for a couple of decades yet.

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