global coral bleaching five times
Last Updated : GMT 09:40:38
Themuslimchronicle, themuslimchronicle
Themuslimchronicle, themuslimchronicle
Last Updated : GMT 09:40:38
Themuslimchronicle, themuslimchronicle

greater than 1980s

Global coral bleaching five times

Themuslimchronicle, themuslimchronicle

Themuslimchronicle, themuslimchronicleGlobal coral bleaching five times

A scuba diver checks coral reefs in the Red Sea off the southern Israeli resort city
Miami - Muslimchronicle

Coral bleaching, a deadly disease that strikes reefs when oceans heat up, has risen nearly five-fold since the 1980s, threatening the future of these vital ecosystems, researchers said Thursday.

Severe coral bleaching events used to happen once every 25 to 30 years. Now, they occur every six years on average, said the report in the journal Science.

"Before the 1980s, mass bleaching of corals was unheard of," said lead author Terry Hughes, director of the Australian Research Council (ARC) Centre of Excellence for Coral Reef Studies.

"But now, repeated bouts of regional-scale bleaching and mass mortality of corals has become the new normal around the world as temperatures continue to rise."

Millions of people worldwide depend on corals for their livelihoods, whether for tourism or scuba diving, or for the fish and sea creatures that make their homes in reefs.

When water temperatures rise suddenly, algae in the corals can die, cutting off an important source of nutrients. If warming persists for several months, corals can turn white and die.

The study analyzed bleaching events at 100 locations around the world between 1980 and 2016.

In the last few years, 30 percent of bleaching episodes could be described as "severe," extending tens to hundreds of miles, or kilometers.

The risk of severe bleaching has risen about four percent per year since 1980.

- 'Stress response' -

"Coral bleaching is a stress response caused by exposure of coral reefs to elevated ocean temperatures," said co-author Andrew Baird, also of Coral CoE.

"When bleaching is severe and prolonged, many of the corals die. It takes at least a decade to replace even the fastest-growing species."

The risk of bleaching events has increased most strongly over time in Australia, parts of Asia and the Middle East.

The Great Barrier Reef has bleached four times since 1998, including back-to-back events in 2016 and 2017 that wreaked massive damage.

Many but not all bleaching events are driven by the tropical warming trend known as El Nino, which last peaked in 2015 and 2016.

Climate change -- and the continued burning of fossil fuels -- is also playing a role, making bleaching events increasingly common.

"The climate has warmed rapidly in the past 50 years, first making El Ninos dangerous for corals, and now we're seeing the emergence of bleaching in every hot summer," said co-author C. Mark Eakin of the US National Oceanic and Atmospheric Administration.

Hughes said he hopes the study will "help spur on the stronger action needed to reduce greenhouse gases in Australia, the United States and elsewhere."

source: AFP

themuslimchronicle
themuslimchronicle

GMT 09:02 2018 Tuesday ,23 January

No end to eyesores at Taj Mahal

GMT 09:03 2018 Monday ,22 January

Letter shows Simone de Beauvoir's passion

GMT 13:25 2018 Saturday ,20 January

Vienna marks 100 years since artistic heyday

GMT 06:15 2018 Thursday ,18 January

Macron's tapestry gesture risks rousing

GMT 08:47 2018 Monday ,15 January

Japan sewers clean up their act

GMT 10:43 2018 Friday ,12 January

Ancient mining ops buildings found

GMT 08:58 2018 Wednesday ,10 January

Show rescues photo comics

GMT 07:49 2018 Sunday ,07 January

sparks UK royal wedding row
Themuslimchronicle, themuslimchronicle
Themuslimchronicle, themuslimchronicle

Name *

E-mail *

Comment Title*

Comment *

: Characters Left

Mandatory *

Terms of use

Publishing Terms: Not to offend the author, or to persons or sanctities or attacking religions or divine self. And stay away from sectarian and racial incitement and insults.

I agree with the Terms of Use

Security Code*

global coral bleaching five times global coral bleaching five times

 



Themuslimchronicle, themuslimchronicle

GMT 08:26 2018 Tuesday ,23 January

Five things to know about Davos

GMT 09:54 2017 Wednesday ,30 August

North Korea says more missiles to come

GMT 12:15 2017 Tuesday ,21 February

Wozniacki gets back to work with Dubai win

GMT 08:16 2017 Friday ,13 October

New York police probing 2004 Weinstein assault case

GMT 20:45 2017 Wednesday ,25 October

Germany’s Lufthansa says third-quarter profit down

GMT 10:39 2017 Saturday ,23 December

Baidu accuses former exec of stealing

GMT 09:22 2017 Sunday ,19 November

What is the Paris Agreement?

GMT 20:18 2016 Monday ,14 March

UAE Council of Scientists holds first meeting

GMT 06:09 2017 Sunday ,17 December

Porzingis eases injury fears for Knicks

GMT 16:00 2017 Thursday ,07 December

Big fines planned for 'revenge porn' in Australia

GMT 08:45 2017 Sunday ,10 September

What is storm surge and why is it so dangerous?

GMT 06:20 2017 Saturday ,16 December

Strong Wall Street lifts European stock markets

GMT 23:19 2017 Monday ,30 October

KSA set to stage top-level squash

GMT 03:52 2013 Friday ,20 September

The Oslo accords and historical revisionism

GMT 18:16 2011 Tuesday ,04 October

Noor Al-Shareef to play Mubarak

GMT 10:49 2011 Thursday ,29 December

Fernandez prepares for surgery

GMT 07:10 2017 Tuesday ,13 June

Journey to statehood still long for Iraq Kurds

GMT 18:19 2017 Sunday ,05 March

Egyptian Ramadan Sobhi wins man-of-the-match
Themuslimchronicle, themuslimchronicle
Themuslimchronicle, themuslimchronicle
 
 Themuslimchronicle Facebook,themuslimchronicle facebook  Themuslimchronicle Twitter,themuslimchronicle twitter Themuslimchronicle Rss,themuslimchronicle rss  Themuslimchronicle Youtube,themuslimchronicle youtube  Themuslimchronicle Youtube,themuslimchronicle youtube

Maintained and developed by Arabs Today Group SAL.
All rights reserved to Arab Today Media Group 2023 ©

Maintained and developed by Arabs Today Group SAL.
All rights reserved to Arab Today Media Group 2023 ©

muslimchronicle muslimchronicle muslimchronicle muslimchronicle
themuslimchronicle themuslimchronicle themuslimchronicle
themuslimchronicle
بناية النخيل - رأس النبع _ خلف السفارة الفرنسية _بيروت - لبنان
themuslimchronicle, themuslimchronicle, themuslimchronicle