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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7
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13answers
4k views

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 ...
24
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10answers
12k views

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 ...
4
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3answers
258 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 ...
3
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4answers
178 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
161 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
141 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 ...
1
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1answer
162 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. ...
3
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2answers
302 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 ...
9
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4answers
716 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 ...
-12
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1answer
211 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 ...
14
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4answers
1k views

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 ...
1
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0answers
56 views

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 ...
3
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4answers
198 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 ...
7
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10answers
2k views

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 ...
8
votes
1answer
116 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 ...
0
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2answers
86 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 ...
1
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1answer
64 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 ...
5
votes
4answers
205 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
votes
4answers
326 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 ...
8
votes
1answer
134 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
639 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 ...
2
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1answer
97 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
63 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. ...
3
votes
1answer
192 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 ...
6
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2answers
307 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 ...
1
vote
1answer
136 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 ...
6
votes
1answer
167 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 ...
1
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1answer
39 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
votes
4answers
101 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-...
6
votes
3answers
488 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?
6
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4answers
271 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
233 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 ...
10
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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 ...
-3
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5answers
250 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, ...
10
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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 ...
0
votes
1answer
87 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 ...
15
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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
votes
1answer
426 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
vote
1answer
193 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 ...
2
votes
2answers
125 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 ...
5
votes
4answers
265 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 ...
8
votes
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 ...
4
votes
2answers
235 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 ...
1
vote
2answers
126 views

How would a colossal explosion affect an ocean-based planet?

In my book series, a space station called the T-Ray that is capable of causing explosions the size of the Chixculub impact explosion just fired at a planet that is completely covered by a massive ...
7
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3answers
1k views

How Would A Group of Undersea Explorers Survive if Their Food Supply Ran Out?

In my book series, a group of a few hundred explorers are sent from a planet called Ishgabangaloodoo to explore Sea World. Some things to know about Ishgabangaloodoo: Its citizens are referred to as ...
8
votes
2answers
146 views

How would you go about seeding oceans of Europa with adapted Earth life?

How do you go about building a working Earth-like ocean ecosystem from scratch in Europa's subsurface ocean? On Earth, abyssopelagic species have evolved to live more than 6km below the surface. ...
0
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0answers
42 views

How would an extra moon affect the tides? [duplicate]

In my world, I'm planning to add a second moon which would be positioned closely to the first. I was wondering what effect would that have on the tides?
9
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4answers
2k views

In a single-continent world, what could cause hydrothermal vents?

In the world I'm building, there is a single continent. However, in the deeper parts of the ocean, there are hydrothermal vents. They're pretty necessary to my story, but I can't figure out why they ...
23
votes
12answers
8k views

Is it possible to bind multiple ships together on open water?

In Renaissance period, would it be possible to safely bind ships together for extended periods of time? Imagine if there was a fleet of large ships (say, two dozen) that have been traveling over a ...
5
votes
3answers
251 views

What would happen to the climate if Earth's sea-levels rose 2000m?

This is the first of possibly several posts about the following scenario, in which Earth's sea-level rises 2 km overnight, generating a world map looking like this: Question: What would be the ...