Questions tagged [ocean]

For questions about bodies of salt water large enough to sustain their own internal currents and do not drain to any larger body of water. Covers both currents, navigation, and ecology.

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127 views

I'm on a sinking submarine, what should I do to survive? [on hold]

I am on a submarine submerged roughly 800ft (250m), and it will reach crush depth in approximately 5 minutes. The submarine is unable to surface under its own power. Are there steps that can be taken ...
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7answers
5k views

Is It Possible to Have Different Sea Levels, Eventually Causing New Landforms to Appear?

I'm trying to explain a large continent-sized archipelago that doesn't run in any particular direction. As such, plate tectonics cannot possibly explain its existence. This is an Earth-like planet. ...
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3answers
245 views

Can Humanity Expand to the Oceans?

Consider a large landmass such as Australia. Imagine if they hypothetically wanted to expand their borders, but they already used up all of their landmass, including the deserts. Could humanity find ...
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How To Make Earth's Oceans as Brackish as Lyr's

Allow me to present Lyr, one of a handful of worlds crafted by artist Chris Wayan: The one detail among a vast many that is important to this question is that its salinity is about 1.5%, roughly half ...
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224 views

Could a mature (and giant) lobster remain in sea water indefinitely without decaying?

My pantheon of storyline gods includes a "titan" of sorts, in the form of a giant lobster. At one point in time, she returns to the coastal ocean and exists in a meditative state on the seafloor for ...
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0answers
60 views

Relationship between Ocean Gases and Atmospheric Gases [closed]

A version of this question is posted in Chemistry SE but doesn't seem to be getting traction there. Perhaps this SE is a bette place for this question? If you think it belongs on a different SE please ...
11
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1answer
350 views

Defining a superfluid ocean

I'm working on a world where water acts as a high-temperature superfluid. Specifically, H2O's lambda point is above its boiling point. Thus, all liquid water on the planet behaves as a superfluid. It ...
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13answers
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What could cause the sea level to massively decrease?

I'm trying to find a justification to the sea level on Earth decreasing by a large amount (in the range of 1000 / 2000 m). The change would begin during the Modern Era or in the future, and last long ...
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10answers
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Could human civilization live 150 years in a nuclear-powered aircraft carrier colony without resorting to mass killing/ cannibalism?

An un-treatable virus starts infecting and killing people. Societies are on the brink of collapse, and it is decided the best way to save the most amount of people is to move everyone who can fit into ...
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3answers
270 views

Planet with Gridlike Seas

An Earth analog had been modified by an advanced species to have saltwater seas in an interconnected grid across the planet's surface. The planet has no true oceans and only the large grid network of ...
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4answers
187 views

What plant life and resources could humans consume if colonies were established on the ocean floor?

I'm interested in creating some construct of a society in the Twilight and Midnight zones of the ocean. By what means could they mine, farm, and trade in what is suppose to be a more futuristic ...
6
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2answers
200 views

If Earth's Oceans Were as Deep as Europa's

Earth's deepest point, the Challenger Deep, is almost seven miles below sea level. By contrast, Europa is smaller than even Earth's moon, yet its oceans are anywhere between 40-100 miles deep! So the ...
6
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1answer
152 views

Ocean currents near the poles

I'm trying to create a earth-like world, with different land masses. I want to make a realistic climate scheme and determining ocean currents is a part of this. I've done some research on ocean ...
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1answer
170 views

What is the largest I can make my water planet, while remaining within Earth-like parameters?

What is the largest planet I can get, while still remaining within Earth-like parameters? My concern is with gravity, water pressure and atmospheric pressure. Escape velocity is less of a concern. ...
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2answers
313 views

How much land disappearing would it take to drop the sea level by 10 meters (30ft)?

THINK ATLANTIS There's an island. Maybe it is a continent, maybe not. I am not sure and that is why I need your help. If the size of my world is equal to Earth's, what landmass size would it take ...
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753 views

Realistic Alternatives to Dust: What Else Could Feed a Plankton Bloom?

Phytoplankton are not to be taken for granted. Not only do they form the core of marine food webs around the world, they also release half of the world's oxygen. But phytoplankton, being plant-like ...
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1answer
249 views

Are laser sharks feasible? [closed]

idea Sharks with lasers that blast through the ocean! Yeah! Could it work though? I am looking for some weapons to place on my sharks with fixed weapons on their heads. How feasible is it to ...
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4answers
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Towers in the ocean; How deep can they be built?

Many questions on this site mention how difficult it is for merfolk to develop technologically, as there's almost nothing but rocks and kelp to work with. My solution to this is that they use these ...
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Would it be possible for an analog of humans to evolve in the oceans - Specifically Octopoids? [duplicate]

Humans are tool users and through their ingenuity were able to hunt much larger animals than themselves. Specifically, I would like to have a race of sentient beings based on octopuses. They use ...
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4answers
270 views

Would a monster size aquatic lizard be possible?

So, I am writing a comic which will perhaps grow into an entire series about a group of aquatic heroes. One of those heroes is a monster size aquatic lizard. The story of how this lizard came about is ...
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10answers
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What benefits would be gained by using human laborers instead of drones in deep sea mining?

In the near future the demand for resources only rises due to both a ever growing population, energy and resource crises, and rampant consumerism. Peak oil has been reached, scarce resources like ...
7
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1answer
123 views

How would ocean currents work with a gulf that's closed to the equator on both sides?

I'm running a D&D campaign and am using a modified map of Venus for it that shows what Venus would look like with similar amounts of water to Earth. The problem I'm running into is mapping the ...
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2answers
93 views

Tides on a Super Close In Moon

I have a moon covered in liquid water that orbits a super-Earth very closely. As you might imagine, the tides are incredibly strong on this moon. However, it is tidally locked and so does not ...
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1answer
66 views

How would humans survive being on a rock formation in the middle of the ocean? [closed]

You're just walking down the street not expecting anything when you suddenly black out and wake up on a small rock formation seemingly in the middle of the ocean. Looking around you see four other ...
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4answers
217 views

What would happen if the boiling point of a section of ocean was lowered to 5C?

Suppose, that in a particular area of the ocean on an earth-like planet, all water molecules are transmuted into an exotic variety of $H_2O$ that is identical to normal water in every way except with ...
6
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4answers
345 views

Would storms on an ocean world harm the marine life?

On a habitable world completely covered in water, with no land above sea-level, there would presumably be storms of biblical proportions. Suppose this world has oceans so deep that the deeper layers ...
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1answer
143 views

Can you critique my sea temp map and answer a couple of specific questions?

I'm working on yet another iteration of a world map project. I'd like to ask for some opinions on the sea temperature map I've done: I also have a few specific questions about some areas on the map. ...
5
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5answers
642 views

How to share a mine of irresistable resources in the middle of an ocean without conflict?

The year was 2019. Somewhere in the middle of the North Atlantic Ocean (between Bermuda & Ponta Delgada) a new volcano erupted violently for a year. The volcano created a tiny island around 100 ...
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1answer
115 views

Life evolving on a artificial Floating Island on a ocean world [closed]

I'm having troubles with developing my ocean world. Same size as Earth, same atmosphere and gravity. The idea is that on a planet with an endless ocean with no continental landmass. The only form of ...
5
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2answers
65 views

What would Define Ecosystems in a “Frozen Moon with Ocean” World

What factors would influence ecosystem development in an ocean on an ice world? It is thought that several moons in our solar system (e.g. Europa) may have significant oceans under their icy crusts. ...
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1answer
198 views

What would be the implications of an ocean made from blood on the world? [closed]

In my world of Ulhe rather than having saltwater between continents the oceans are filled with the blood of a god. Besides being blue the blood has similar physical properties to human blood. It is ...
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2answers
328 views

Would there still be land if the amount of water in the oceans was doubled?

A portal to another Earth in a parallel universe is open at the bottom of the Ocean and all the water is moving to the new Earth in the form of a waterfall in the middle of the Atlantic. The form of ...
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1answer
137 views

How the orbit of Earth changes if it has the double of water in the ocean? [closed]

A portal to another Earth in a parallel universe is open at the bottom of the Ocean and all the water is moving to the new Earth in the form of a waterfall in the middle of the Atlantic. The form of ...
5
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1answer
183 views

Ocean currents on a world with 1 continent and many archipelagos

I am building a world that has a single giant continent and nine island chains around the equator. I watched Artifexian's video on ocean currents and made a basic map, but it has no information ...
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1answer
40 views

Could controlling the oceans result in a wide-spread freeze?

My idea is a device that gives its user great power over the ocean, its currents, and presumably temperatures. Could this be used to dramatically (and in relatively short time) effect the climate of a ...
5
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4answers
106 views

How to identify sapient jellyfish?

There is a sapient jellyfish species resembling the box jellyfish found to be lurking in the ocean today. A team of researchers took a sub and dived into the abyss to look for it. What kind of non-...
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3answers
520 views

How can I get different colours of ocean? [closed]

We think of oceans and large lakes as being blue. How can I get other colours in a way that is reasonably compatible with what we know from terrestial bio-geo-chemistry?
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4answers
295 views

Water planet turns into desert world without being rendered uninhabitable

A habitable (human could survive in its atmosphere without suits) desert planet which used to have large oceans is quite common in ScFi. I was thinking about the processes which could have been ...
7
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2answers
263 views

The Worldkillers - Method I: Oceans

This series will focus on a Worldkillers: a group of interstellar outlaws who specialize in destroying worlds. Each question has the objective to explore a different way to kill a planet - a word ...
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5answers
2k views

How vulnerable are the undersea internet cables to deliberate sabotage by one of the major powers (US, UK, Russia, etc)? [closed]

Over 99% of the transcontinental internet traffic goes through a network of 280 sets of undersea cables. How vulnerable are these to deliberate sabotage by the major powers? I'd rather not focus ...
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5answers
268 views

How would a Viking-age civilization deal with kraken-and-dragon-infested seas?

In my book series, there is this planet called Ryu 108. Ryu 108 consists of two continents: Bjørnholm, which is heavily forested and bears a strong resemblance to southern Norway or southern Sweden, ...
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4answers
3k views

Could Earth still survive if we lost almost 90% of all surface water?

I have been toying with the idea that all oceans are gone. Underground water still exists but the Earth has essentially turned into the planet from Dune. My characters all live / survive out where ...
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1answer
91 views

Floating Ocean Vegetation

I have several types of free-floating vegetation to pick from: Trees Reeds/grasses Lily Pad like-plants Which type would best survive in the open ocean supporting small pockets of creatures, since ...
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3answers
2k views

Plastic and oil eating microbes apocalypse part 1 - How fast can they spread?

Plastic is a huge problem in our lives. One of the ideas is to engineer plastic eating bacteria or fungi. Experiments already begun, and accidents already happen: a team of international scientists ...
9
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1answer
467 views

Can someone help me with ocean currents? I'm really confused

I've been working on a constructed world which started out as the home of an alien race from a sci-fi story I'm writing but just became a pure world building project. As you can see from the map it ...
1
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1answer
197 views

What would a sea made of Iodine look like? [closed]

If it was possible, what would a sea made of liquid state Iodine look like? How would it smell? From my research, I've seen people saying its liquid state is somewhat "invisible" since it generates a ...
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2answers
129 views

Equatorial or Meridial Ocean

I am building a world that is mostly land but i need something to divide it all up a bit so i decided I'm adding an ocean. What i want to know is the following: Would it be even remotely possible ...
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4answers
279 views

If an alien had evolved on a planet with 10 times Earth's gravity, how far into Earth's Ocean could they dive?

Let's assume that this hypothetical alien crawled out of the identical primordial ooze to the point where they share significant genetic similarity with humans, and due to either evolution or outside ...
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5answers
1k views

Some science or graspable logic behind a whole new world below the ocean on earth

So not trying to wander into flat earth theory here, But a hidden fantasy world (of elves) in the present day. How would we explain it. There is no contact whatsoever between the two world. Could ...
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2answers
251 views

What Sea Creatures Would Make Good Undersea Cavalry?

In my book series, there is an underwater civilization called the Lobster Empire (basically underwater Rome inhabited by Crab and Lobster people). Stuff to know about the Lobster Empire: Roman-esque ...