Cold Weather Convection: Does Warm Water Rise or Fall?

In summary, the conversation discusses whether warm water rises or falls in cold weather, with the questioner initially thinking it falls. However, the responder explains how water density changes in different temperatures and how that affects its movement. The context of the question is unclear, as it could refer to water outside in the air or in the ocean.
  • #1
caprija
34
0
Does warm water rise or fall in cold weather?

I think it falls

Does it have to do with convection??
 
Physics news on Phys.org
  • #2
The question makes no sense. "Weather" implies the atmosphere and water is a liquid, so water falls in the atmosphere regardless of if it is warm or cold. Can you provide some context to the question?
 
  • #3
caprija said:
Does warm water rise or fall in cold weather?

I think it falls

Does it have to do with convection??

Above 4°C, water gets denser as it cools. This means that warmer water rises under these conditions. Below 4°C, water becomes actually becomes less dense as it cools. Under those conditions warm water will fall as you guessed.
 
  • #4
LeonhardEuler said:
Above 4°C, water gets denser as it cools. This means that warmer water rises under these conditions. Below 4°C, water becomes actually becomes less dense as it cools. Under those conditions warm water will fall as you guessed.
Are you reading "weather" as 'water'?
 
  • #5
Gokul43201 said:
Are you reading "weather" as 'water'?

The situation I assumed he was talking about was you have some water outdoors like a lake or something, and the water is at a temperature close to the air, but it isn't completely uniform. It's the only way it makes sense. I know they sometimes give ocean temperatures in weather reports, so maybe the question is actually legitimate.
 

1. Does warm water rise or fall in cold weather convection?

In cold weather convection, warm water will rise.

2. Why does warm water rise in cold weather convection?

Warm water rises because it is less dense than cold water. When water is heated, the molecules spread out and become less tightly packed, making it less dense than the colder water. This causes it to rise to the surface.

3. How does cold weather convection affect global ocean currents?

Cold weather convection can affect global ocean currents by causing warm water to rise and cold water to sink. This movement of water can impact the direction and strength of ocean currents, which in turn can influence climate patterns around the world.

4. Is cold weather convection the same as warm weather convection?

No, cold weather convection and warm weather convection are not the same. Warm weather convection occurs when warm air rises and cold air sinks, while cold weather convection involves the movement of warm and cold water. However, both processes are driven by differences in density.

5. What are some real-life examples of cold weather convection?

Cold weather convection can be seen in the formation of sea ice in the Arctic and Antarctic regions. As the surface water freezes and becomes more dense, it sinks to the bottom and is replaced by warmer water rising to the surface. This process helps regulate the Earth's climate and has a significant impact on marine ecosystems.

Similar threads

  • Other Physics Topics
Replies
8
Views
1K
Replies
6
Views
3K
  • Materials and Chemical Engineering
Replies
7
Views
2K
Replies
8
Views
1K
  • Other Physics Topics
Replies
31
Views
3K
  • Classical Physics
Replies
6
Views
2K
  • Earth Sciences
Replies
18
Views
6K
Replies
11
Views
2K
Replies
2
Views
1K
  • Mechanical Engineering
Replies
15
Views
2K
Back
Top