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Climate climate change  antarctica is melting says nasa | Upload General

Climate Change: Antarctica Is Melting Says NASA

by: Ariana M
climate change  antarctica is melting says nasa | Upload

We have all heard that the sea level is rising, but many feel that this change is insignificant, almost negligible. Indeed, this change has so far been happening very slowly – since 1900, the sea has risen only about 8 inches (20.3 cm) in total. However, more than a third of that increase has occurred in the past 25 years. So why is that happening and what can we expect in the years to come?

Antarctica’s Ice Is Disappearing At Alarming Rates

A recent study was done by the IMBIE (Ice Sheet Mass Balance Inter-comparison Exercise) team, an international collaboration of polar scientists has shown that Antarctica is quickly becoming one of the largest contributors to sea-level rise. In 2012, it was estimated that the Antarctic ice melt was causing global sea levels to rise by 0.2mm a year – however, this number has increased to 0.6mm per year.

This threefold increase is very significant, considering that it only happened within five years. To understand why the ice is melting so much faster, the scientists had to study the changes in all three areas of Antarctica’s ice sheet: the Antarctic Peninsula, West Antarctica, and East Antarctica. It appears that West Antarctica has lost the highest volume of ice, thus being the region to contribute most to the sea-level change.

The reason why West Antarctica is most susceptible to melting is that it is primarily made up of glaciers that are located below sea level. Traditionally, when thinking of ice melting, we usually imagine it melting from above as it gets heated from the air, sunlight, and infrared energy from the atmosphere. However, recent studies have shown that most of the melting occurs from below – and it is causing more melting.

Recommended: Sea Level Rise Limited By Hydro Dams. Strange!

Climate Change: The Devastating Melting Cycle

When glaciers melt, they release freshwater into the ocean, making the surface around them less salty and, therefore, less dense. This slows down or, in some cases, even prevents the natural mixing of the sea. During winter, the colder water from the surface cannot mix with warmer water below, allowing the latter to retain its heat and melt the glaciers from below. More freshwater gets released, and this cycle repeats itself, each time accelerating the rates at which the glaciers melt.

Currently, ice shelves hold the Antarctic ice sheet in place. The trapped warm waters flowing underneath the shelves can break them down into smaller pieces, making them unable to support the ice sheet. Melting of the ice sheet would lead to catastrophic consequences – the West Antarctic part ice sheet alone would raise the sea levels by more than 3 meters (9,8 feet).

While West Antarctic is currently the biggest concern, it seems like East Antarctic is also being affected by this devastating cycle. Some of its most massive glaciers are starting to show signs of melting, and they have the potential of rising sea levels by 4,8 meters (16 feet). This problem is still in its early stages, but it causes a lot of concerns about the future.

NASA To Launch An Ice-Monitoring Satellite

Many islands and coastal areas have already been affected by the sea level rise, and accurate predictions could help minimize the negative impacts. To help scientists make these predictions, NASA is launching ICESat-2 – a new satellite that will measure the changing heights of Earth’s polar ice using six lasers. These lasers will send 10’000 pulses per second, allowing for the measurements to be taken with incredible precision. The ICESat-2 is scheduled to launch on the 15th of September, and the mission has been slated for three years, but it can be extended.

All of the researchers agree on one thing – sea level is rising at an accelerated rate, and it is likely directly linked to global warming. There is nothing we can do to reverse the sea level rise, but we can slow down climate change before it is too late.

Have you experienced the effects of sea-level rise? Share your opinion with us in the comments!

Before you go!

Recommended: A Floating Airport Cutting Edge Madness Or Visionary?

Did you find this an interesting article, or do you have a question or remark? Leave a comment below. We try to respond the same day.

Like to write your article about sea-level rise?
Click on 'Register' or push the button 'Write An Article' on the 'HomePage.'

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Climate Change: Antarctica Is Melting Says NASA

We have all heard that the sea level is rising, but many feel that this change is insignificant, almost negligible. Indeed, this change has so far been happening very slowly – since 1900, the sea has risen only about 8 inches (20.3 cm) in total. However, more than a third of that increase has occurred in the past 25 years. So why is that happening and what can we expect in the years to come? Antarctica’s Ice Is Disappearing At Alarming Rates A recent study was done by the IMBIE (Ice Sheet Mass Balance Inter-comparison Exercise) team, an international collaboration of polar scientists has shown that Antarctica is quickly becoming one of the largest contributors to sea-level rise. In 2012, it was estimated that the Antarctic ice melt was causing global sea levels to rise by 0.2mm a year – however, this number has increased to 0.6mm per year. This threefold increase is very significant, considering that it only happened within five years. To understand why the ice is melting so much faster, the scientists had to study the changes in all three areas of Antarctica’s ice sheet: the Antarctic Peninsula, West Antarctica, and East Antarctica. It appears that West Antarctica has lost the highest volume of ice, thus being the region to contribute most to the sea-level change. The reason why West Antarctica is most susceptible to melting is that it is primarily made up of glaciers that are located below sea level. Traditionally, when thinking of ice melting, we usually imagine it melting from above as it gets heated from the air, sunlight, and infrared energy from the atmosphere. However, recent studies have shown that most of the melting occurs from below – and it is causing more melting. Recommended:  Sea Level Rise Limited By Hydro Dams. Strange! Climate Change: The Devastating Melting Cycle When glaciers melt, they release freshwater into the ocean, making the surface around them less salty and, therefore, less dense. This slows down or, in some cases, even prevents the natural mixing of the sea. During winter, the colder water from the surface cannot mix with warmer water below, allowing the latter to retain its heat and melt the glaciers from below. More freshwater gets released, and this cycle repeats itself, each time accelerating the rates at which the glaciers melt. Currently, ice shelves hold the Antarctic ice sheet in place. The trapped warm waters flowing underneath the shelves can break them down into smaller pieces, making them unable to support the ice sheet. Melting of the ice sheet would lead to catastrophic consequences – the West Antarctic part ice sheet alone would raise the sea levels by more than 3 meters (9,8 feet). While West Antarctic is currently the biggest concern, it seems like East Antarctic is also being affected by this devastating cycle. Some of its most massive glaciers are starting to show signs of melting, and they have the potential of rising sea levels by 4,8 meters (16 feet). This problem is still in its early stages, but it causes a lot of concerns about the future. NASA To Launch An Ice-Monitoring Satellite Many islands and coastal areas have already been affected by the sea level rise, and accurate predictions could help minimize the negative impacts. To help scientists make these predictions, NASA is launching ICESat-2 – a new satellite that will measure the changing heights of Earth’s polar ice using six lasers. These lasers will send 10’000 pulses per second, allowing for the measurements to be taken with incredible precision. The ICESat-2 is scheduled to launch on the 15 th  of September, and the mission has been slated for three years, but it can be extended. All of the researchers agree on one thing – sea level is rising at an accelerated rate, and it is likely directly linked to global warming. There is nothing we can do to reverse the sea level rise, but we can slow down climate change before it is too late. Have you experienced the effects of sea-level rise? Share your opinion with us in the comments! Before you go! Recommended:  A Floating Airport Cutting Edge Madness Or Visionary? Did you find this an interesting article, or do you have a question or remark? Leave a comment below. We try to respond the same day. Like to write your article about sea-level rise? Click on  'Register'  or push the button 'Write An Article' on the  'HomePage.'
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