Two types of feedbacks that have substantial effects on climate change are the melting of permafrost and water vapor feedback. Both of these feedbacks are considered to be positive feedbacks, which implies that they amplify warming. Permafrost is permanently frozen soil that stores massive amounts of carbon. Permafrost occurs mostly in high latitudes, and comprises of approximately 24% of the land in the Northern Hemisphere. As temperatures increases as the result of climate change, permafrost, which is made up of dead organic plant matter frozen into the soil that has yet to decay, is at risk of melting and releasing the stored carbon (that is hundreds to thousands of years old) as carbon dioxide and methane (which are powerful greenhouse gases).
The opening scene shows the collapse of a massive ice shelf (a floating glacier) in Antarctica. Could this really happen? If so, how might it affect global sea levels? The collapse of massive ice shelves have become more common with the changes in climate.
I have chosen earth’s coldest biome, the arctic tundra for this week’s discussion post. The arctic tundra is one of the most fascinating biomes to me specifically for its exponential impact on this planet and delicate ecosystem. The Arctic tundra is located in the far northern hemisphere along with several isolated islands off of the coast of Antarctica in the southern hemisphere. In the arctic tundra you can expect a lifeless and extreme environment with only two seasons that being winter and summer. Tundra is land with underlying permafrost and the arctic tundra has permafrost-reaching hundreds of feet thick and continues to get thicker the closer to the poles you go.
The main languages include Greenlandic, Danish, and some English. The island expands to 1660 miles long and 650 miles wide. Greenland is known for its vast ice sheet, which is has a capacity of 10,000 feet. The island sits inside the arctic circle. Scientists have insisted that Greenland’s Ice Sheets have shown signs of melting at a dangerous rate, not knowing if it is long-term effect causing it.
How glaciers affect the Rocky Mountains Intro The Rocky Mountains are located in the South West Canada and the North West America all through to central New Mexico. The highest peak of the Rocky Mountains is 14,255 ft. above sea level (encyclopedia). A brief history of the rocky mountain is that the way they were formed during the Mesozoic era when an earthquake occurred involving the plate from the ocean and the plate from the continental running into each other. The Oceanic plate is pushed under the continental plate causing volcanos and the land to be pushed inward causing the land to rise forming mountains (United States). Glacier are made from snow that is then compressed over the years that it turns into ice, they can be formed on both
It is common knowledge that sea ice has been melting rapidly within the last decade. This rapid decrease in sea ice has many detrimental effects. This includes the rise in sea level, loss of arctic environments for animals, and the change in weather patterns. Ice is lighter in color so it reflects much of the sunlight that is put out. When open water is revealed from ice melt it is darker in color so it absorbs more sunlight, leading to that rapid melting of ice that we see today.
“Between 1990-2000 an 82% reduction in glaciers, showing a linear withdrawal of the ice of 10-15m yearly. Under the current climate trends, glaciers of the country will disappear completely within the next 100 years” (Sandra Liboria,n.d, para.2). This is one of the impacts of climate change in Colombia, and the scale of the phenomenon can be appreciated by the alarming numbers that show the environmental disruption of these places. The increase in global temperature due to greenhouse gas emissions is affecting the cooler areas of Colombia. The freshwater that in previous years was frozen is now flowing through the rivers of the territory.
The more solar radiation that is absorbed, the more heat. The more heat, more ice melts. The more ice melts, the more solar radiation that is absorbed leading to more heat, leading to more ice melting. The temperature continues to be pushed further in the direction it was already going, therefore why the arctic ice melting is a positive
Polar bears rely on different types of ice (multi-year ice and seasonal ice) for hunting and transportation to get to denning and hunting areas. The climate for the past almost 2 decades has not significantly been increasing, however the climate has increased since 1990 by about 0.34 degrees Celsius. This warming and the warming of the oceans is believed to be the cause for the decline in Arctic sea ice, however the sea ice in Antarctica has been increasing so it is uncertain why sea ice levels continue to decline at such a fast rate. Carbon dioxide has increased since 1960 and is projected to continue will the world going through development and yes temperature has risen with carbon dioxide levels but it is not accurate to say that the
This illuminated a reason that isn’t even fully caused by the humans, but it is mostly based on the weather! The current, average temperature of this famous landmark ranges from 10 to 14 degrees. Adding the amount of filth already on Everest, many items may become frozen. Frozen things may stay on this peak for years, perhaps decades, and even centuries! These issues impacted the way Mount Everest looked, and it still does.