emfizz.com
emfizz.com June 23, 2017


Antarctica is turning green due to rising temperatures

19 May 2017, 04:17 | Bernard Bryant

A Green Island moss bank with icebergs. Credit Matt Amesbury

Antarctica'greening due to climate change

In addition to climate change, the extinction of animal species, plastic waste - there could be more of that than fish in the sea by 2050 - ash from fossil fuels and radioactive particles from nuclear bomb tests will all leave a permanent record in the planet's future rocks.

Scientists studying banks of moss in Antarctica report that plant life on the continent is blooming.

"The sensitivity of moss growth to past temperature rises suggests that ecosystems will alter rapidly under future warming, leading to major changes in the biology and landscape of this iconic region", said co-author Dan Charman, also from Exeter.

"Temperature increases over roughly the past half century on the Antarctic Peninsula have had a dramatic effect on moss banks growing in the region", said Dr Matt Amesbury, of the University of Exeter.

"What we're also seeing concurrently with climate change are other physical processes such as glacier retreat particularly", Dr Amesbury said.

Taken together, the team say the results show that moss banks across the region are responding to warming, adding that variations in the measure of favourability for photosynthesis between sites is likely down to local differences in moisture levels. Their findings appeared Thursday in the journal Current Biology.

Those sites include three Antarctic islands - Elephant Island, Ardley Island, and Green Island - where the deepest and oldest moss banks grow.

"The benefits of our work and our sites that we've been able to study is that we can make conclusions about a wide area", Dr Amesbury said.

'Single greatest witch hunt of a politician in American history,' Trump claims
On Wednesday, Deputy Attorney General Rod Rosenstein appointed former FBI Director Robert Mueller to be the special counsel. Rosenstein is the lead Justice Department official on the investigation into Trump's connections with Russian Federation .


U.S. should take some of blame for massive cyberattack, Chinese media says
To check if your current antivirus software offers protection, go to its settings and check if it mentions "ransomware" anywhere. Microsoft ended up distributing the free patch for the older versions on Friday - the day the ransomware was detected.


Donald Trump told Michael Flynn to "stay strong" amid growing scandal
Trump was also asked about his thoughts on the appointment of former FBI Director Robert Muller to lead the probe. "I think it is totally ridiculous", Trump said.


"Assuming a flat Antarctica allows for more transport of warm air from lower attitudes", he said.

"On average, in terms of the growth rate of moss before and after 1950, there has been a four to five-fold increase in average growth rates".

The Arctic is warming the fastest, but Antarctica is not far behind, with annual temperatures gaining nearly one degree Fahrenheit (half degree Celsius) each decade since the 1950s. These included the amount of moss, its rate of growth, the size of populations of microbes and a ratio of different forms, or isotopes, of carbon in the plants that indicates how favourable conditions were for photosynthesis at a particular point in time.

"If the temperatures are below 0C, it doesn't matter if they change by 1 or 2 degrees, because all the water is still locked away as ice", she says.

While the prospect of more plant growth might sound like a good thing from a greenhouse gas perspective, Professor Robinson said the warming could potentially release greenhouse gases from the ancient buried moss, which has so far remained frozen.

The researchers looked at 150 years of data and samples of the moss from around the peninsula.

"What we're going to be doing next is trying to understand more about the relationships between the proxies that we measured in the mosses, how they've changed over longer time scales, before the advent of the human influence on climate", he said.



Other News

Trending Now

Cavaliers destroy Celtics in Game 1 of Eastern Conference Finals
Here are my final "3 Shots" after the Cavaliers dominant 117-104 win over the Celtics in Game 1 of the Eastern Conference Finals. Love opened up the floor for James, burying outside jumpers and forcing Boston to leave defenders one-on-one with James.

Comey Testimony Before Lawmakers in Doubt After Special Counsel Named
Thursday afternoon, Deputy Attorney General Rod Rosenstein, the man who appointed Mueller , briefed senators behind closed doors. Claire McCaskill, D-Mo., said that Rosenstein knew before making his recommendation to Trump that the president would fire Comey.

Trump lashes out, calls Russian Federation investigation a 'witch hunt'
The White House has defended its actions, and continues to deny any collusion with Russian Federation during the 2016 campaign. But lawmakers of both parties largely praised the naming of former FBI director Robert Mueller to oversee that investigation.

Democrat to Congress: President Trump 'must be impeached'
In January, Trump reportedly sought a pledge of loyalty from Comey and failed to obtain it. Comey's memo regarding his discussion with the president".

Will Smith Comes to the Defense of Netflix at Cannes
The move sparked a bitter response from Netflix, with boss Reed Hastings claiming "the establishment is closing ranks against us". Chinese actress Fan Bingbing, who is also on the jury, wore a sweeping duck-egg blue dress with a built-in cloak.

Manchester United to land Oblak if De Gea leaves for Real Madrid
Southampton and a makeshift Manchester United fought out a goalless draw in a tepid Premier League clash on Wednesday in a repeat of the League Cup final.

Trump Administration Says It Will Launch NAFTA Renegotiation
The agreement, which has been in place since 1994 , lifted numerous tariffs on trade between the U.S., Canada and Mexico. Despite this tension, the United States and Mexico have conducted trade with each other every day worth $1.4 billion.

Home win streak is NHL's longest in two decades
As the Conference Finals continue we'll give you a recap from last night's game and what to look for in tonight's action. What's Next: The series shifts to Bridgestone Arena in Nashville for Game 3, which will be played Tuesday at 8 p.m.

Jays' Pillar gets two-game suspension for homophobic slur
Louis on April 25 but was shocked by his opposite-field homer on an 0-2 pitch from Teheran in the fourth inning. It wasn't as if the Braves didn't try to get under Bautista's skin - or at least bruise it - however.

New Orleans Uproots Third Confederate Statue In Early Morning Operation
The statues will be put in storage while the city looks for a suitable place to display them, CNN reported . In addition, the city plans to have an announcement regarding the statues' removal Friday at Gallier Hall.