News Home Video Gallery Newsletters Photo Gallery Cruising Int
Sail-World.com : Change in salinity detected in the world’s oceans
Change in salinity detected in the world’s oceans

'Deploying an Argo float in the Tasman Sea'    © Copyright CSIRO Australia    Click Here to view large photo

In a paper published in the journal Science, Australian scientists from the Commonwealth Scientific and Industrial Research Organisation (CSIRO) and the Lawrence Livermore National Laboratory, California, reported varying patterns of salinity in the global ocean during the past fifty years, marking a clear fingerprint of climate change.

Lead author, Dr. Paul Durack, said that by looking at observed ocean salinity changes and the relationship between salinity, rainfall and evaporation in climate models, they determined the water cycle has strengthened by four per cent from 1950-2000. This is twice the response projected by current generation global climate models.

'Salinity shifts in the ocean confirm climate and the global water cycle have changed.'

'These changes suggest that arid regions have become drier and high rainfall regions have become wetter in response to observed global warming,' said Dr Durack, a post-doctoral fellow at the Lawrence Livermore National Laboratory.

With a projected temperature rise of 3ºC by the end of the century, the researchers estimate a 24 per cent acceleration of the water cycle is possible.

Scientists have struggled to determine coherent estimates of water cycle changes from land-based data because surface observations of rainfall and evaporation are sparse. However, according to the team, global oceans provide a much clearer picture.

'The ocean matters to climate – it stores 97 per cent of the world’s water; receives 80 per cent of the all surface rainfall and; it has absorbed 90 per cent of the Earth's energy increase associated with past atmospheric warming,' said co-author, Dr Richard Matear of CSIRO's Wealth from Oceans Flagship.

'The ocean matters to climate – it stores 97 percent of the world’s water; receives 80 percent of the all surface rainfall and; it has absorbed 90 percent of the Earth's energy increase associated with past atmospheric warming'

Dr. Richard Matear: 'Warming of the Earth’s surface and lower atmosphere is expected to strengthen the water cycle largely driven by the ability of warmer air to hold and redistribute more moisture.'

He said the intensification is an enhancement in the patterns of exchange between evaporation and rainfall and with oceans accounting for 71 percent of the global surface area the change is clearly represented in ocean surface salinity patterns.

In the study, the scientists combined 50-year observed global surface salinity changes with changes from global climate models and found 'robust evidence of an intensified global water cycle at a rate of about eight per cent per degree of surface warming,' Dr. Durack said.

Dr. Durack said the patterns are not uniform, with regional variations agreeing with the 'rich get richer' mechanism, where wet regions get wetter and dry regions drier.

He said a change in freshwater availability in response to climate change poses a more significant risk to human societies and ecosystems than warming alone.

'Changes to the global water cycle and the corresponding redistribution of rainfall will affect food availability, stability, access and utilization,' Dr. Durack said.

Dr. Susan Wijffels, co-Chair of the global Argo project and a co-author on the study, said maintenance of the present fleet of around 3,500 profilers is critical to observing continuing changes to salinity in the upper oceans.

The work was funded through the Australian Climate Change Science Program, a joint initiative of the Department of Climate Change and Energy Efficiency, the Bureau of Meteorology and CSIRO. Dr Durack is a graduate of the CSIRO-University of Tasmania Quantitative Marine Science program and he received additional support from CSIRO's Wealth from Oceans Flagship. Work undertaken at Lawrence Livermore National Laboratory is supported by the U.S. Department of Energy under contract DE-AC52-07NA27344.

CSIRO website


by CSIRO

  

Click on the FB Like link to post this story to your FB wall

http://www.sail-world.com/index.cfm?nid=98722

11:51 PM Wed 20 Jun 2012GMT


Click here for printer friendly version
Click here to send us feedback or comments about this story.

Click for further information on
Environment and the ocean

Related News Stories:

23 May 2012  Tres Hombres sailing cargo ship arrives, no room at the inn
08 May 2012  Tres Hombres - another sailing cargo ship
07 May 2012  Another Solar Odyssey - around the USA's 'Great Loop'
06 May 2012  PlanetSolar - she's arrived! First around the world on solar energy
29 Apr 2012  The Waterfront Challenge - calling all sailors
27 Apr 2012  Bottom paint matters - San Diego waterways get a thumbs-up
18 Apr 2012  Solar-powered yacht's circumnavigation - in the home stretch
09 Apr 2012  Royal Yacht Squadron leads the armada against windfarm plan
06 Apr 2012  Where the whales are
19 Mar 2012  GreenBlue wants a report card
MORE STORIES ...






Cruising USA







The real ‘Supermoon’ story by Sail-world.com,




Sailor rescued after Facebook call for rescue by RNLI/Sail-World Cruising,












The Galley Guys' favourite shrimp recipe by Andy Adams and John Armstrong,












The final touch - which wax should I use on my boat? by Martin Flory/Sail-World Cruising,


ARC Baltic sets sail to discover Europe's 'east sea' by World Cruising Club/Sail-World,








Heart-stopping moment as whale capsizes Zodiac by Sail-World Cruising round-up,


If we stop killing parrotfish we can bring back Caribbean coral reefs by ARC Centre of Excellence for Coral Reef Studies,


Climate change could stop fish finding their friends by ARC Centre of Excellence for Coral Reef Studies,














A Beer Bummel on the Thames River by Greg Nicoll with John Armstrong,




Why Boats Sink: Ten best tips on prevention
The North West Passage calls: Who will answer this year?
Polish adventure sailor in second try at North West Passage
Whale research - new techniques expand for non-lethal methods
Jessica Watson, solo sailing star, four years on...
Americas solo non-stop circumnavigator crosses Pacific for research
What is an El Niño and how will it affect my sailing? (Part 1)
The Dinghy Nav Light Solution- a brilliantly dumb idea
Spike in water temperatures evidence of ‘irreversible’ El Nino *Feature
Sailing crew's battle to save yacht lost in the Indian Ocean
Five Top Tips for selecting the best boatyard
Tips for selecting the best boatyard
Predictwind unlocks more features on free accounts
Composite Rigging launches new campaign for ECsix
When is a Captain not a Captain?
Free app for managing your yacht
Amazing MOB survival - 13 hours floating, rescued by fishermen
Boater hit by lightning survives: 'It was the worst pain ever'
Inauguration of the new Yacht Club Monaco - Images by Carlo Borlenghi
Lessons for sailing clubs - how does YOURS rate?
Turkey's new cruising black/gray water rules, skipper qualifications   
Giving up the luxuries of a life on land for Lizzy Belle   
Dehler 46, 'serious' cruising boat, debuts July   
SV Mystic to carry out OHPRI teen summer camps and voyages for adults   
Australian rescuers get bravery medal for rescuing Russian sailor   
Sailors and windfarms: Largest ever UK wind project approved   
Cooking at Sea? Which cook book should I buy?   
Fraudulent yacht broker gets jail for twelve months   
Jimmy Buffett's Margaritaville joins Summer Sailstice   
Retired yachting star to sail again - for the love of her boat   
The quest to save coral - one man's plan   
Paint Guide: Carry it with you on your smart phone   
The mouse is roaring. Newport mooring owners don't want docks   
Being a guest on someone's boat - 8 Tips to get you invited again   
Bounty sinking Coast Guard final report: rot, decay, low standards   
Carbon monoxide poisoning on boats - it keeps happening   
Own a romantic Skipjack for just $10,000   
Classics Rally in Falmouth - historic and spectacular this weekend   
New Polar Code for cruising in the high latitudes   
Croatia's sailing world comes of age   


For this week's complete news stories select    Last 7 Days
   Search All News
For last month's complete news stories select    Last 30 Days
   Archive News







Sail-World.com  


















Switch Default Region to:

Social Media

Asia

Australia

Canada

Europe

New Zealand

United Kingdom


http://www.sail-world.com/event_images/image/Twitter_logo_small.png http://www.sail-world.com/event_images/image/FaceBook-icon.png  

United States

Cruising Northern

Cruising Southern

MarineBusiness World

PowerBoat World

FishingBoating World

 

Contact

Commercial

News

Search

Contact Us

Advertisers Information

Submit news/events

Search Stories/Text

Feedback

Advertisers Directory

Newsletter Archive

Photo Gallery

 

Banner Advertising Details

Newsletter Subscribe

Video Gallery

Policies

 

 

 

Privacy Policy

 

 


Cookie Policy

 

 



This site and its contents are © Copyright TetraMedia and/or the original author, photographer etc. All Rights Reserved.  Photographs are copyright by law.  If you wish to use or buy a photograph contact the photographer directly.
XLXL NEW Cru USA
LocalAds   DE  ES  FR  IT