What is the main cause of sea level rise?

What is the main cause of sea level rise?

What is the main cause of sea level rise?

the sea ​​level rises for two reasons: Thermal expansion (also called steric effect): due to theincrease temperature, water expands which means that its volume increasedThe supply of fresh water from melting ice and polar ice caps.

What impact can the melting of sea ice have on the environment?

The consequences are the loss of habitat for many animals and local populations, but also the modification of ocean currents and the rise in sea levels, which poses a risk of flooding in many other regions of the world.

Why is the melting of the sea ice accentuating global warming?

The whiteness of pack ice reflects the rays of the sun, while the dark surface of the sea, like a black coat, absorbs much more heat.

Why does melting sea ice not raise sea levels?

When icebergs melt, they help raise the level of the seas, like when other continental glaciers melt. When the pack ice background, she does not raise sea level. Since it is formed by water from sea frozen, its cast iron put not additional water in the seas.

What happens on the surface of glaciers?

This is exactly what is currently happening on the surface of glaciers. Due to rising mercury, glaciers lost more than 9 trillion tons of ice between 19, causing a 27mm rise in sea levels.

How does a glacier form?

For a glacier to be formed or maintained, the supply of snow must exceed or balance the loss of ice due to the melting, sublimation and sliding of the mass of frozen water downstream. The minimum altitude for obtaining the conditions necessary for the formation of a glacier varies according to the climate and the latitude of a region.

How does a glacier move?

A glacier advances, moves due to gravity or deforms, flows due to its own weight. The speed and direction of the movement depend on the topography, the temperature of the glacier, its air content, the quantity of liquid water it contains,…

What is the extent of a glacier?

Mount Sidley and the ice sheet in Antarctica. Their area is more than 50,000 km2. that of Antarctica. In addition to morphology, glaciers can be classified according to their temperature. This is obviously a function of the altitude and the latitude of the glacier but also of the presence or not of volcanic activity under the glacier.