Tuesday , May 17 2022

Extreme weather turns to the BROWN Arctic – and it could accelerate climate change



[ad_1]

Over the last few years, Arctic scientists have noted the perception of surprise: large areas of Arctic are turning brown.

This is partly due to extreme weather conditions associated with winter weather, such as sudden, short periods of life of extreme warmth.

These events occur as climate heating, which occurs twice as fast as the Arctic compared to the rest of the planet.

Damp and brown vegetation on moorland in Norway. Sheffield's researcher has warned that browning occurs in a scary rate, with seriously increasing effects that cause extensive death and damage to blanket.

Damp and brown vegetation on moorland in Norway. Sheffield's researcher has warned that browning occurs in a scary rate, with seriously increasing effects that cause extensive death and damage to blanket.

Damp and brown vegetation on moorland in Norway. Sheffield's researcher has warned that browning occurs in a scary rate, with seriously increasing effects that cause extensive death and damage to blanket.

THE TWO PURCHASES THE THAW ARCHIC

Cold drought & # 39; occurs when a snow-insulating layer usually protects winter winter and aristic acid is usually melted, usually by an unusually high winter temperature.

If plants are still open to cold, windy conditions for a long time, they are constantly losing water and can not replace the soil to freeze.

Ultimately, they fall into drought.

The second effect is hot and warm warmth & # 39; – A sudden cut of high temperature during the winter that melts the snow and cricket evergreen plants to prepare for the spring by stealing their cold tolerance.

When the warm period over, the return of cold temperatures usually kills the plant.

So extreme events occur more often and more often, with seriously increasing effects – including extensive damage and death in the Arctic plants.

This is brown & white; of plant communities has occurred over thousands of square kilometers or more.

However, until recently, we do not know very little about what this could mean for the balance between carbon acquisition and release into Ecosystems and Arctic.

Given that the Arctic stores twice as much carbon as the atmosphere, this is a big concern.

Now, our study has shown that extreme climatic events can reduce the ability of Arctic ecosystems to take carbon – with the implications of whether the Arctic will help to combat, or accelerate climate change.

To understand how extreme incidents affect Arctic heathlands, we traveled to the Lofoten Islands in northern Norway where coastal, sub-Arctic coastal communities are active for future climate change North, showing the effects of warming in the region first.

Here we saw the effects of two extreme winter weather events.

First, there was a cold drought & # 39; has caused extensive death on plants.

Ice drought occurs when a snow-insulating layer usually protects winter and severe Arctic plants is melted, usually by unusually high winter temperatures.

If plants are still open to cold, windy conditions for a long time, they are constantly losing water and can not replace the soil to freeze.

MELTING ICE CREATES NEW NEW SHOPPING PATH

A.M. Denmark, Moller-Maersk, the largest shipping group in the world, said one of the cargo ships had been able to pass through the Russian Arctic on a one-off trial trip due to ice melt sea

Palle Laursen, Maersk's chief technical officer, said the test enabled us to gain exceptional operational experience.

Mr Laursen adds Venta Maersk and every system onboard performs well in the unfamiliar environment.

Ice melting in the Central Arctic Stefan Hendricks / Alfred Wegener / PA)

Ice melting in the Central Arctic Stefan Hendricks / Alfred Wegener / PA)

Ice melting in the Central Arctic Stefan Hendricks / Alfred Wegener / PA)

The world's largest shipping company is piloting a shortcut & # 39; through the Arctic as global warming is open to the famous North East path.

Mr Laursen said the ship had arrived at St Petersburg on Friday, after leaving the city of Russia's ports in China at Vladivostok on August 22.

The ship passes through the Bering River on September 6.

The North Sea Route could be a shorter route for trips from East Asia to Europe or the North West Gateway of Canada because it is likely to be free of ice soon due to climate change.

Ultimately, they fall into drought.

The second event was the warmest winter & # 39; – A sudden cut of high temperature during the winter that melts the snow and cricket evergreen plants to prepare for the spring by stealing their cold tolerance.

When the warm period over, the return of cold temperatures usually kills the plant.

In this case, however, we found something unexpected.

Heathland plants survived to this extreme winter warming event, but showed evidence of severe stress, visible as a deep deep dark red color in shoes and leaves.

Deep red pigment indicates that this plant is stressful of the unpredictable climate.

Deep red pigment indicates that this plant is stressful of the unpredictable climate.

Deep red pigment indicates that this plant is stressful of the unpredictable climate.

We measured the amount of carbon dioxide taken and released by the plants in three types of vegetation: damaged moorland (where the most prominent evergreen species had been dried by ice drought), heath under pressure, and a healthy green heath that had escaped the effects of either extreme event.

This was done in three measuring stages throughout the growing season.

We found that the extreme conditions in winter reduce the amount of carbon absorbed in moorland ecosystems up to 50% across the whole growing season.

This is a huge reduction in the ability of the broad Arctic ecosystem to eradicate carbon from the atmosphere.

Surprisingly, this is the case in a heavily damaged moor, where a large part of the vegetation was killed, and in heath stressed.

Although the processes that drive this change differ in all types of moorland, this clearly shows that we need to consider the role of plant weight in limiting the use of plant carbon to appreciate; n full results of extreme climatic events.

The more traditional artic tundra

The more traditional artic tundra

The more traditional artic tundra

What does this mean for the Arctic? We now know that extreme climatic events can significantly reduce the ability of Arctic ecosystems to take carbon and tackle climate change.

This is particularly relevant as the effects of browning are very contrasting with those of a better response that are understood from Arctic ecosystems to climate change: Arctic greening, or tendency to Plants become bigger and more productive as Arctic summers are warm.

Instruments that capture carbon and release them on the site and the test.

Instruments that capture carbon and release them on the site and the test.

Instruments that capture carbon and release them on the site and the test.

Many climate models are currently assuming arbitrary green levels across the Arctic, so the ecosystems will take more carbon in the future – slow down climate change.

The browning scale we have seen in recent years, together with the negative effects on the carbon acceptance reported here, suggests that the reality can be more complex, by ask for an understanding of the role of the Arctic in the Earth's climate.

What does this mean for us? The impact of extreme weather events in the Arctic has global results.

It is clear that our current efforts to tackle climate change are inadequate, but ambitious action could reduce what the Arctic is expected to heat up as much as 7 ° C.

This is crucial to reducing the effects of climate change in Arctic and global ecosystems.

[ad_2]
Source link