Ozone hole linked to southern rain increases

A A A

The hole in the ozone layer over Antarctica is a significant driver of climate change and rain increases in the southern hemisphere over the past 50 years, US scientists said Thursday.

The findings by a team at Columbia University's School of Engineering and Applied Science are the first to link ozone depletion in the polar region to climate change all the way to the equator.

Researchers said the analysis should lead policy-makers to consider the ozone layer along with other environmental factors such as Arctic ice melt and greenhouse gas emissions when considering how to tackle climate change.

"It's really amazing that the ozone hole, located so high up in the atmosphere over Antarctica, can have an impact all the way to the tropics and affect rainfall there," said Sarah Kang, lead author of the study in the journal Science.

"It's just like a domino effect," she said.

Scientists say the Antarctic ozone hole, discovered in the 1980s, was created by the extensive use of manmade aerosols containing chlorofluorocarbons (CFCs).

Since the signing by 196 countries of the 1989 Montreal Protocol, most CFC production around the world has stopped, and experts expect the hole to close by the middle of this century.

"While the ozone hole has been considered as a solved problem, we're now finding it has caused a great deal of the climate change that's been observed," said co-author Lorenzo Polvani, senior research scientist at the Lamont-Doherty Earth Observatory.

The study used two independently drawn climate models - the Canadian Middle Atmosphere Model and the United States' National Center for Atmospheric Research (NCAR) Community Atmosphere Model.

In four experiments comparing data on sea ice, surface temperatures, precipitation and the ozone hole, the analysis showed the hole was the main driver of heavy summer rains across eastern Australia, the southwestern Indian Ocean and the Southern Pacific Convergence Zone.

"We show in this study that it has large and far-reaching impacts. The ozone hole is a big player in the climate system," said Polvani.

"This could be a real game-changer."

Next, the researchers plan to look at "extreme precipitation events," the sort that cause devastating floods and landslides.

"We really want to know if and how the closing of the ozone hole will affect these," said Kang.

Life and Style
Customers can get their caffeine fix on the move
food + drink
Life and Style
techCould new invention save millions in healthcare bills?
Sport
David Moyes gets soaked
sport Moyes becomes latest manager to take part in the ALS challenge
News
peopleEnglishman managed the quintessential Hollywood restaurant Chasen's
PROMOTED VIDEO
Have you tried new the Independent Digital Edition apps?
Voices
Mosul dam was retaken with the help of the US
voicesRobert Fisk: Barack Obama is following the jihadists’ script
Arts and Entertainment
Flat out: Michael Flatley will return to the stage in his show Lord Of The Dance
danceMichael Flatley hits West End for last time alongside Team GB World champion Alice Upcott
News
Members and supporters of the lesbian, gay, bisexual, transgender (LGBT) community walk with a rainbow flag during a rally in July
i100
Life and Style
Black Ivory Coffee is made using beans plucked from elephants' waste after ingested by the animals
food + drinkFirm says it has created the "rarest" coffee in the world
Arts and Entertainment
Loaded weapon: drugs have surprise side effects for Scarlett Johansson in Luc Besson’s ‘Lucy’
filmReview: Lucy, Luc Besson's complex thriller
Arts and Entertainment
Jamie T plays live in 2007 before going on hiatus from 2010
arts + entsSinger-songwriter will perform on the Festival Republic Stage
Life and Style
food + drinkThese simple recipes will have you refreshed within minutes
News
Jermain Defoe got loads of custard
i100
News
peoplePamela Anderson rejects ice bucket challenge because of ALS experiments on animals
Latest stories from i100
Have you tried new the Independent Digital Edition apps?
iJobs Job Widget
iJobs General

Data Insight Manager - Marketing

£32000 - £35000 Per Annum: Clearwater People Solutions Ltd: Our client based o...

Data Centre Engineer - Linux, Redhat, Solaris, SAN, Puppet

£55000 per annum: Harrington Starr: A financial software vendor at the forefro...

.NET Developer

£600 per day: Harrington Starr: .NET Developer C#, WPF,BLL, MSMQ, SQL, GIT, SQ...

Data Centre Engineer - Linux / Redhat / Solaris / Puppet / SAN

£65000 per annum: Harrington Starr: A financial software vendor at the forefro...

Day In a Page

Air strikes? Talk of God? Obama is following the jihadists’ script

Air strikes? Talk of God? Obama is following the jihadists’ script

The President came the nearest he has come yet to rivalling George W Bush’s gormless reaction to 9/11 , says Robert Fisk
Ebola outbreak: Billy Graham’s son declares righteous war on the virus

Billy Graham’s son declares righteous war on Ebola

A Christian charity’s efforts to save missionaries trapped in Africa by the crisis have been justifiably praised. But doubts remain about its evangelical motives
Jeremy Clarkson 'does not see a problem' with his racist language on Top Gear, says BBC

Not even Jeremy Clarkson is bigger than the BBC, says TV boss

Corporation’s head of television confirms ‘Top Gear’ host was warned about racist language
Nick Clegg the movie: Channel 4 to air Coalition drama showing Lib Dem leader's rise

Nick Clegg the movie

Channel 4 to air Coalition drama showing Lib Dem leader's rise
Philip Larkin: Misogynist, racist, miserable? Or caring, playful man who lived for others?

Philip Larkin: What will survive of him?

Larkin's reputation has taken a knocking. But a new book by James Booth argues that the poet was affectionate, witty, entertaining and kind, as hitherto unseen letters, sketches and 'selfies' reveal
Madame Tussauds has shown off its Beyoncé waxwork in Regent's Park - but why is the tourist attraction still pulling in the crowds?

Waxing lyrical

Madame Tussauds has shown off its Beyoncé waxwork in Regent's Park - but why is the tourist attraction still pulling in the crowds?
Texas forensic astronomer finally pinpoints the exact birth of impressionism

Revealed (to the minute)

The precise time when impressionism was born
From slow-roasted to sugar-cured: how to make the most of the British tomato season

Make the most of British tomatoes

The British crop is at its tastiest and most abundant. Sudi Pigott shares her favourite recipes
10 best men's skincare products

Face it: 10 best men's skincare products

Oscar Quine cleanses, tones and moisturises to find skin-savers blokes will be proud to display on the bathroom shelf
Malky Mackay allegations: Malky Mackay, Iain Moody and another grim day for English football

Mackay, Moody and another grim day for English football

The latest shocking claims do nothing to dispel the image that some in the game on these shores exist in a time warp, laments Sam Wallace
La Liga analysis: Will Barcelona's hopes go out of the window?

Will Barcelona's hopes go out of the window?

Pete Jenson starts his preview of the Spanish season, which begins on Saturday, by explaining how Fifa’s transfer ban will affect the Catalans
Middle East crisis: We know all too much about the cruelty of Isis – but all too little about who they are

We know all too much about the cruelty of Isis – but all too little about who they are

Now Obama has seen the next US reporter to be threatened with beheading, will he blink, asks Robert Fisk
Neanderthals lived alongside humans for centuries, latest study shows

Final resting place of our Neanderthal neighbours revealed

Bones dated to 40,000 years ago show species may have died out in Belgium species co-existed
Scottish independence: The new Scots who hold fate of the UK in their hands

The new Scots who hold fate of the UK in their hands

Scotland’s immigrants are as passionate about the future of their adopted nation as anyone else
Britain's ugliest buildings: Which monstrosities should be nominated for the Dead Prize?

Blight club: Britain's ugliest buildings

Following the architect Cameron Sinclair's introduction of the Dead Prize, an award for ugly buildings, John Rentoul reflects on some of the biggest blots on the UK landscape