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بهترین سایت شرط بندی ایرانی
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Global Statistics

All countries
695,781,740
Confirmed
Updated on September 26, 2023 9:04 pm
All countries
627,110,498
Recovered
Updated on September 26, 2023 9:04 pm
All countries
6,919,573
Deaths
Updated on September 26, 2023 9:04 pm

Global Statistics

All countries
695,781,740
Confirmed
Updated on September 26, 2023 9:04 pm
All countries
627,110,498
Recovered
Updated on September 26, 2023 9:04 pm
All countries
6,919,573
Deaths
Updated on September 26, 2023 9:04 pm

Algae is now growing on melting Antarctic snow due to climate change

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What Is Pansexuality—and How Is It Different From Being Bisexual?

3 min read Over the past few years, a number of celebrities have publicly come out as pansexual,including Wayne Brady, Miley Cyrus, Panic! At The Disco frontman Brendan Urie, model and actress Cara Delevingne, pop star Kesha, and perhaps most famously singer Janelle Monáe, who eschewed all sexual labels in favor of describing herself as

By Michael Marshall

Algal blooms in Antarctica

Researchers surveyed blooms of “snow algae” on Anchorage Island, Antarctica

Matt Davey

Part of Antarctica is already green due to blooms of algae living on the snow. As the continent warms, more of it may turn green, but it isn’t clear what this will mean for the climate.

Patches of “snow algae” have been known about for decades in the Arctic. But we know much less about their distribution in Antarctica. “Our work was really the first large-scale survey of snow algae for Antarctica,” says Andrew Gray at the University of Cambridge.

Gray and his colleagues used satellite images to identify patches of green on the snow-covered surface of the Antarctic Peninsula, the part of the continent that is warming the fastest, and the islands nearby. They also visited two islands to confirm the satellite data’s reliability.

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The researchers found that in total, there were 1679 blooms of snow algae that covered up to 1.9 square kilometres at the height of summer when the blooms are largest. Two factors seemed to determine where the blooms were: the temperature had to be warm enough for the snow to become slushy and there had to be a source of nutrients – mostly penguin guano.

A warmer climate would melt more Antarctic snow and destroy some of the algae’s habitat. But it would also mean more areas of slushy snow further inland, so there could be a net increase.

It isn’t clear what more algae would mean for the climate. The team estimates that the algal blooms absorb 479 tonnes of carbon dioxide from the air every year. “The amount of carbon that’s in there is relatively small,” says co-author Matthew Davey, also at the University of Cambridge. However, this may increase if the blooms become more widespread.

While the algae may remove some carbon dioxide from the air, they also darken the white snow causing more of the sun’s heat to be absorbed. Davey and Gray say it isn’t yet possible to estimate the net effects of these impacts.

In the long run, climate change could cause problems for the algae because temperatures could rise so much that the peninsula’s snow completely melts. “If it warms up a bit, you get a lot more blooms,” says Davey. “If it warms up a lot, the whole system could crash completely because there’s no snow.”

Journal reference: Nature Communications, DOI: 10.1038/s41467-020-16018-w

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How Much Weight Men Should Be Able to Deadlift

4 min read IT'S ONLY NATURAL to compare yourself to the guy lifting next to you. It doesn’t matter if he’s bigger and stronger or smaller and scrawnier—everyone wants a benchmark against which to gauge their strength and skill. If that bench (or squat rack, or power platform, or rubberized flooring) happens to be just

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How Much Weight Men Should Be Able to Deadlift

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Mpox strain that may be more severe and easily spread is found in L.A. County for first time

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Trastuzumab Deruxtecan Scores Two Wins in HER2-Positive Early Breast Cancer

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