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Questions tagged [currents]

For questions the dynamics of fluid (including gas) flows. This includes oceanic circulation, rivers, major winds, and atmospheric circulation.

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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 ...
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All the Radioactive Metals Inside Earth's Core--How Would They Affect Convection?

In relation to a recent question of mine, this alternate Earth still has its core consisting of 84% iron, but the other 16% contains the greatest concentrations of all known species of heavy metals (...
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154 views

How can I explain the geography and climate of my planet?

I've recently decided to revive an old project of mine involving an alien planet. Unfortunately, however, I was not as good a worldbuilder then as I am now, and that's having some consequences. Back ...
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9answers
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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 ...
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2answers
163 views

How would the weather be affected by a constant miles-wide maelstrom?

There is a giant equatorial maelstrom surrounded by three landmasses sucking warm water down to the bottom of the ocean. Somehow, magically or some weird physical process I haven't fixed on yet, this ...
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The Tethys Renewed: Where Cold Meets Warm?

The Cape of Good Hope in South Africa is the point where the warm, moisture-carrying Agulhas Current from the Indian Ocean collides with the cold, nutrient-carrying Benguela Current from the Atlantic. ...
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3answers
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How could Reverse Mountain (One Piece) exist? [duplicate]

In One Piece saga there is the so-called Reverse Mountain. This is a Mountain with sea at east and west, land at north and south. A river goes from east to west following the mountain. That means ...
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What would a planet with little to no greenhouse gases be like?

Say if a planet had either no greenhouse gases or a small percentage of a certain greenhouse gas (roughly 5% or less) in its atmosphere, but all other elements in the atmosphere could support life. ...
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2answers
436 views

Could a planet with three-quater earth gravity and neon-/argon-based atmosphere exist, and what would life do with it?

I'm creating a world three-quarters the gravity of Earth, and the composition of the atmosphere are as followed: 74% Neon (or Argon) 18% Nitrogen 5% Oxygen 1.6% Carbon Dioxide 0.9% Water Vapor 0....
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2answers
191 views

Can neon glow by some natural means?

Could neon or argon glow naturally in any way? What would be needed in the atmosphere? P.S. Please don't change my question?
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2answers
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Greenland--Not So Green Anymore

Back home, there are three factors to consider: Mont Forel, Greenland's tallest peak, can be found in coordinates 66.9333° North and 36.8167° West The Arctic Ocean's average depth is 3406 feet, 17,...
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Do humans have the technology necessary to stop the Gulf Stream?

Assume an evil dictator has taken over the whole continent of North America. He has the entire modern array of technologies at his disposal and plans to take over Europe. An evil plan comes into his ...
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2answers
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Effect of an enormous waterfall on regional climate and ecosystem

My premise is that a bay-like body of water empties into a sea via a waterfall. Specifications: The sea is roughly the size and shape of the Mediterranean. The tributary body of water is around 20 ...
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3answers
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What would happen if there was no Antarctic Landmass?

I understand that Antarctica plays a large role in driving ocean currents and thus the climate of the planet. However, I'm curious what the world would be like if there was no Antarctic landmass at ...
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Creating a realistic world - Thermohaline circulation

One crucial aspect of the climates have been left out so far, deep water circulation. It's the major force driving the heat transfer form the equator to the poles and its flow can influences local ...
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How would a north-south rotation affect the ocean? [closed]

In my worldbuilding, I have physically moved the whole Old World (Africa, Asia, Europe and Australia) so far eastward that the Prime Meridian is in Europe's farthest city, Lisbon, rather than ...
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Explaining uphill rivers scientifically?

I see this in so many maps. Normally, the water flows downhill because of gravity but here it is the opposite, rivers will go above the hills. When you mention this incoherence, the authors refuse to ...
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4answers
334 views

All the rivers run west

I'd like to construct a planet where the rivers all run east to west, but I need a plausible reason for them to do so. Rivers run from high altitude to low, but also I suppose there is the coriolis ...
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3answers
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Creating a realistic world map - Currents, Precipitation and Climate

Once geological processes and erosion have created a landscape this landscape will in turn alter the planet. Ocean currents and trade winds will tend to form and certain weather patterns will emerge. ...
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4answers
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How (un)likely is a split of one major river into two others?

I inherited a worldbuilding project, and the former authors liked some things that seem unrealistic. One of them is that one of the world's biggests rivers splits into two other rivers some 300-400 ...