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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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13 votes
6 answers
2k views

Possible reef world?

Piggybacking off this question: Shallow sea world - plausable geology? what would we need to have a world covered in reef? An entire world of this: If I understood them correctly the previous ...
Len's user avatar
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63 votes
9 answers
15k views

A 40km diameter alien saucer is floating 2km above the ocean for a long time. What are the effects on the sea ecosytem below?

Twenty years ago, a 40km diameter alien saucer came to Earth, and stopped 2km above the Atlantic ocean, somewhere near the midpoint between Casablanca, Morroco and Natal, Brazil but over international ...
Mindwin Remember Monica's user avatar
44 votes
6 answers
14k views

What if a portal is opened from the Mariana trench to the Sahara desert?

The first portal is placed at bottom-most point of the Mariana trench (the deepest part of any ocean, located in the western Pacific Ocean) and the second is placed in the Sahara desert in Africa at ...
McGucket's user avatar
  • 699
13 votes
6 answers
4k views

Would it be possible for a city floating on water to exist?

Is there any way that a town or city could exist that has interconnecting houses floating on a body of water? I once read in a novel about a small village like that in a swamp, and was wondering if a ...
Mike.C.Ford's user avatar
  • 7,859
11 votes
9 answers
2k views

Could a deep ocean creature use some kind of bacteria in its body as a way to generate oxygen?

I've been creating a world where most-to-all of its life resides in the deep ocean. For story purposes, I would like said creature to have lungs, but it is not necessary. Description of the Creature ...
Dawnfire's user avatar
  • 1,116
16 votes
7 answers
5k views

What could cause the world to be almost completely submerged in water, naturally or man-made?

I'm trying to build a world that is almost completely water, but I couldn't come up with an explanation for WHY the world was like this. The world has the same gravity and atmosphere of Earth. It also ...
SaneDragon's user avatar
15 votes
5 answers
1k views

An Aztec ship sails east - where does it land?

Given: An ahistorically powerful and advanced Aztec civilisation, anno late 1400s. A set of circumstances much like the ones that led Columbus west: one mad Aztec convinced the world was rather small ...
KeizerHarm's user avatar
  • 14.4k
15 votes
8 answers
2k views

What is a better design for a floating ocean city - monolithic or a fleet of interconnected modules?

Assume that the city is about 1-3 kilometers in diameter, built with relatively futuristic technology, and there are no plans to expand it further (If the need arises, they'll just build a second one)....
Darth Biomech's user avatar
4 votes
2 answers
214 views

How to Cause a Hydrosphere Apocalypse Part II The Great Flood

This is part two of a two part question. You can find part one here.(How to Cause a Hydrosphere Apocalypse Part I The Great Drought) One of the more interesting movies I watched growing up was ...
Jacob Badger's user avatar
  • 2,333
4 votes
5 answers
910 views

When and how do winds and currents form?

I'm trying to design a map for my new planet, but I'm realising I know very little of how planets come to be the way they are, especially when it comes to currents and climates. To make things simple ...
Mr_Bober's user avatar
  • 1,402
24 votes
5 answers
3k views

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 ...
JohnWDailey's user avatar
  • 14.5k
21 votes
5 answers
3k views

How to cross a metallic sea?

Suppose human explorers came across a terrestrial planet hospitable for life, but with more than 70% of its surface covered by gallium. When temperatures rises in the day it will form an ocean of ...
user6760's user avatar
  • 48k
18 votes
7 answers
3k views

What challenges must oceanic plant life overcome in order to create a mat on top of the ocean?

The ocean of my very earth-like planet is covered in its entirety by vegetation, forming a kind of carpet on top of the water's surface. This free-floating halophyte is a superorganism formed by ...
LiveInAmbeR's user avatar
  • 10.6k
16 votes
5 answers
3k views

Would merfolk gain any real advantage from mounts (and beasts of burden)?

In writing my merfolk centric fantasy novel, I've largely ignored any creatures of burden used within their society. Animals of burden were very important in the growth of human civilization, and the ...
WasatchWind's user avatar
  • 3,197
11 votes
3 answers
3k views

Boats for really tall people

So I'm writing a book that takes place in an endless ocean with islands inhabited by many races, and I'm trying to come up with unique boat ideas for races; well I have most of them, but I would like ...
Chebi Kitty's user avatar
11 votes
1 answer
589 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 ...
Dubukay's user avatar
  • 12.2k
11 votes
1 answer
1k views

Water On A World That Is Flat?

For my fantasy world, I have what I think is a really cool idea. The world is flat, and elliptical in shape. If you touch the silvery edge, well, let's just say bad things will happen. (Not relevant......
Xandar The Zenon's user avatar
10 votes
3 answers
1k views

Placing a planet on the famous Escape Velocity Graph

If I'm understanding the chart correctly, in order for a planet with lower gravity than Earth (smaller than Earth), but with decent magnetosphere, to hold on to an atmosphere with oxygen, and water on ...
Len's user avatar
  • 4,948
10 votes
5 answers
777 views

How to simulate tidal currents on an O'Neill Cylinder

How do you simulate tidal currents in an O'Neill Cylinder to maintain a healthy biome for aquatic life? The O'Neill Cylinder contains artificial rivers, freshwater lakes, and "Oceans" which ...
Nosajimiki's user avatar
  • 95.2k
10 votes
1 answer
2k 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 ...
Automatic Utopian's user avatar
9 votes
4 answers
617 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 ...
TheDyingOfLight's user avatar
9 votes
11 answers
3k views

Given early 1800's level technology, is it feasible to extract salt and fresh water from the ocean?

Suppose the setting is a small coastal island with only three towns in it. (I imagine it's roughly the size of the Isle of Man, perhaps a little bit bigger.) Technology level is roughly around the ...
Globin347's user avatar
  • 5,797
9 votes
2 answers
470 views

How long would would it take algae to spread through the sea

Our intrepid interstellar crew arrive in a new solar system. They find a planet in the Goldilocks zone. The planet has no life, but is otherwise earth like*. The atmosphere is 80% nitrogen, 20% carbon ...
DarcyThomas's user avatar
  • 1,731
9 votes
3 answers
2k views

Can a planet have oceans of ethanol?

Earth and Titan prove that ocean be made of water and liquid methane, respectively. Theoretical planets with oceans of liquid ammonia and sulfuric acid are believed to exist. But what about alcohol?
LordKvasir's user avatar
8 votes
4 answers
2k views

How to have high tides in the tropics?

The Bay of Fundy sees the world's highest tides, with ocean water advancing and withdrawing as much as 20 meters or more within a single day. Here is a list of the 50 tidal stations around the world ...
kingledion's user avatar
  • 85.5k
8 votes
2 answers
599 views

What are the conditions of an Earth-like, water-ball planet?

I'd like to explore some details on a so-called water-ball planet (i.e. a planet in the habitable zone of a sun, covered by a 100 km deep ocean). I am particularly interested where life could develop ...
Sir Cornflakes's user avatar
8 votes
5 answers
1k views

How would a civilization of marine life avoid human detection?

In the story I'm writing, there is a global civilization of marine life that's parallel to human civilization on land, however in its world, humans have little-to-no knowledge of the underwater ...
BlueTangsRock's user avatar
7 votes
2 answers
2k views

Life in extremely low gravity water

Let's assume the planet has only one half the mass of the moon and is covered by shallow ocean. To eliminate water pressure at extreme depths, assume the ocean is also quite shallow, with a maximum ...
Armok's user avatar
  • 151
6 votes
3 answers
1k views

How can two planets merge into another, bigger planet?

In my universe, there are two ocean-based planets floating in space. I would like to merge them together in a realistic way. What kind of event could cause the planets to merge into a bigger one? (...
kraken55's user avatar
6 votes
2 answers
466 views

How plausible are underwater trees?

In the process of developing an ocean world setting for my fiction, I have often pondered whether to give the sapient species of the world access to some form of wood or other resource from underwater ...
FrankRebin's user avatar
6 votes
4 answers
953 views

Sea Travel Variables

Basically, I am looking for variables in travel for the same ocean or sea journey, along the coast, but in the opposite direction. No motors, just standard 15th century ships. I am building a world ...
Erin Thursby's user avatar
  • 32.1k
6 votes
2 answers
383 views

How do ocean currents work on a tidally locked planet?

I am currently designing a tidally locked world with a big enough ocean to transfer heat from the day side to the night side and vice versa. Here is a map of my world: The darker sides are supposed ...
ΓΙΑΝΝΗΣ ΜΙΧΑΗΛΙΔΗΣ's user avatar
6 votes
2 answers
270 views

How to keep this artificial water planet from evaporating or freezing?

Piggybacking on this question: Could soft matter infused with nano or pico sized magnets be used to clump together so that we could create environments with it? ...So we have a planet that has lower ...
Len's user avatar
  • 4,948
6 votes
3 answers
585 views

How would it feel to sail a Rocheworld ocean?

A couple days ago, I posted this question about what it would feel like to walk on a Rocheworld. For some background, a Rocheworld is a double planet system where the two planets are so close ...
Lot-Of-Malarkey's user avatar
6 votes
2 answers
781 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 ...
Malkev's user avatar
  • 2,683
5 votes
1 answer
150 views

Creating fog over the ocean and large island using electricity and..?

Short version: This sea dragon can discharge and manipulate electricity. It wants to cover a large area of the ocean's surface in fog, how could it accomplish this? The creature is intelligent and has ...
Littlepip21's user avatar
5 votes
4 answers
328 views

Are low-energy submarines possible?

I'm envisioning submarines just cruising around doing normal things, taking the role of cars, trucks, RVs. I'm trying to estimate how much energy they would need. https://en.wikipedia.org/wiki/...
Humphrey's user avatar
  • 1,601
5 votes
2 answers
146 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. ...
codeMonkey's user avatar
4 votes
3 answers
226 views

What technology would be necessary to allow soldiers to ascend rapidly from deep in the ocean and to the surface?

In my world, submarine technology and ocean exploration is highly sophisticated. A large sub can house hundreds of people in addition to smaller subs and they are used to travel, kind of like ...
forgotenm's user avatar
  • 1,054
3 votes
2 answers
387 views

is it possible to detect submarines in a sea from an aircraft? if possible how will it be?

While working on my story, I just came up with this doubt. Is it possible to know or to detect something like a submarine in an ocean from an aircraft with our current technology? I mean to detect it ...
Peaceman's user avatar
  • 803
0 votes
2 answers
167 views

How would the ocean currents of a tidally locked super-Earth work? [closed]

Suppose for a moment that a large planet orbits an M0 red dwarf star (51% as wide, 60% as massive and only 7% as bright as our sun). It itself is 230% as wide and 700% as massive as Earth. There is ...
JohnWDailey's user avatar
  • 14.5k
0 votes
5 answers
363 views

Fleet defenses against massive creatures [closed]

In my fantasy world, humanity thrives on massive migratory fleets, moving in large numbers between the sparse islands. However, there are massive creatures that live in these places in between, ...
Unhappymarshmellow's user avatar