as arctic ice melts, so does the snow, and quickly - space air conditioner

by:HICOOL     2021-10-11
as arctic ice melts, so does the snow, and quickly  -  space air conditioner
The number of Arctic sea ice has fallen sharply this year: last week, scientists announced that Arctic sea ice has reached its lowest point in history, breaking previous records.
But it turns out that this is not the most dramatic change in the Arctic.
A study by Canadian researchers found that snow in spring melts faster than ice in the Arctic.
This also has a profound impact on the Earth's climate.
Snow melting in spring is important: it determines when spring runoff comes out of the mountains and fills our rivers.
Chris Dixon of Environment Canada, Toronto, said snow also reflected the sun back into space, helping to prevent the Earth from heating up too fast.
"When you remove snow from the surface of the land, like removing sea ice from the ocean, you take away a high reflective, bright surface, he said: "You exposed the bare land or the tundra below and absorbed more solar energy. ".
The dark land can absorb heat and warm the Earth.
Scientists have been paying attention to this trend for many years.
But Derksen and his colleague Ross Brown have completed a study that has been published in the Geophysical Research Express, which records the speed of the snow melting
It turns out that snow is rapidly disappearing in the far north on June and May.
"It's falling faster than summer sea ice," Derksen said . ".
"As a result, the snow loss across the Arctic is as great as the loss of sea ice.
"Derksen is expected to gradually decline, but he was surprised when he looked back at the satellite measurements of the past five years and saw the speed of this loss.
Snow melting is falling at a rate of 18% per decade, compared with 11% per decade for Arctic sea ice.
"It's a bit shocking," he said . "
This is also contrary to the predictions of scientists.
More than a dozen research groups around the world use computer models and simulations to predict the rate of change in our warming world.
The impact of snow melting "we are now losing Arctic snow in the spring at a faster rate than the model predicted," said Dickson . ".
This "questions to some extent what the situation will look like for 10, 20, or 30 years from now.
"Even today, biologists who study life in the far north are concerned about snow melting in early spring. Syndonia Bret-
Hart of the University of Alaska at Fairbanks says the change affects the rivers on which spawning fish depend.
It also accelerates the melting of the permaculture layer, a layer of frozen soil that contains a lot of carbon.
When the permanent layer melts, it releases these greenhouse gases into the atmosphere.
Then there is a fire problem in the northern forest.
"If the weather dries faster in the spring, then you can get more fires, which is another trend we have seen in recent years, that is, the increase in the frequency of fires and the size of fires, bret saidHarte.
She said that although these effects are felt most strongly in the far north, they also affect us.
"Because the Arctic is air conditioning. . .
For the rest of the Northern Hemisphere, Arctic warming may also cause warming feedback in a more southern climate.
"There is no doubt that global warming has caused the early melting of snow in the spring, the researchers said.
Philip moster of the Oregon Institute of Climate Change says the rapid loss of sea ice may have something to do with early snow melting.
"Snow melting in the early spring" may help the Arctic absorb heat and melt sea ice faster, so that by the end of summer, this time of year, we can see very low levels, "Mott said.
But there is a big difference between snow melting and sea ice.
As the sea ice is becoming thinner and thinner every year, and the elasticity is getting smaller, the melting trend seems inevitable to continue.
But Mort said Long.
For spring snow melting, the long-term accumulation of greenhouse gases may not be all.
"The atmosphere and the ocean do different things every year, which also affects snow in a way independent of greenhouse gases," he said . ".
So Mote is not sure if this dramatic trend will continue to spiral in recent years.
That is to say, long
The term trend is clear: less snow, less ice, warming.
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