sail-world.com
 
 
News Home Cruising Photo Gallery Video Gallery

 

Sail-World.com : Climate is warming – despite 'ups and downs'

Climate is warming – despite 'ups and downs'

'Periodic short-term cooling should not be misinterpreted as signalling an end to global warming. (Credit: Chris Crerar) Reference: 10/116'    © Copyright CSIRO Australia    Click Here to view large photo

CSIRO Marine and Atmospheric Research, Barrie Hunt, says 'Despite 2010 being a very warm year globally, the severity of the 2009-2010 northern winter and a wetter and cooler Australia in 2010 relative to the past few years have been misinterpreted by some to imply that climate change is not occurring.'

'Recent wet conditions in eastern Australia mainly reflect short-term climate variability and weather events, not longer-term climate change trends. Conclusions that climate is not changing are based on a misunderstanding of the roles of climatic change caused by increasing greenhouse gases and climatic variability due to natural processes in the climatic system.

'These two components of the climate system interact continuously, sometimes enhancing and sometimes counteracting one another to either exacerbate or moderate climate extremes.'

Mr Hunt says his climatic model simulations support what is clear from recent observations – that in addition to the role of climate change linked to human activity, natural variability produces periods where the global climate can be either cooler or warmer than usual. Mr Hunt’s results were published in the latest edition of the international journal Climate Dynamics.

He says some such natural temperature variations can last for 10 to 15 years, with persistent variations of about 0.2°C.

'Such natural variability could explain the above average temperatures observed globally in the 1940s, and the warm but relatively constant global temperatures of the last decade.'

Mr Hunt also found that seasonal cold spells will still be expected under enhanced greenhouse conditions. For example, monthly mean temperatures up to 10°C below present values were found to occur over North America as late as 2060 in model simulations, with similar cold spells over Asia. Variations of up to 15°C below current temperatures were found to occur on individual days, even in 2060, despite a long-term trend of warming on average.

'These results suggest that a few severe winters in the Northern hemisphere are not sufficient to indicate that climatic change has ceased. The long-term trends that characterise climate change can be interpreted only by analysing many years of observations.'

'Future changes in global temperature as the concentration of greenhouse gases increases will not show a simple year-on-year increase but will vary around a background of long-term warming. Winters as cold as that recently experienced in the Northern Hemisphere, however, will become progressively less frequent as the greenhouse effect eventually dominates,' Mr Hunt said.

This underlying warming trend, reflected in the projections of future climate and the observation that the past decade has been the warmest in the instrumental record, underline the need to both adapt to what is now inevitable change and mitigate even greater changes.

CSIRO website click here




by CSIRO

  

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

http://www.sail-world.com/index.cfm?nid=78813

7:04 AM Wed 5 Jan 2011 GMT






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


News - USA and the World











































International Moth Worlds: Rashley ahead as Aussies close in by Mark Jardine / YachtsandYachting.com,




















International Moth Worlds - Mothballed on day 4 + Video by Mark Jardine / YachtsandYachting.com,




Gladwell's Line: A change of direction needed in the America's Cup *Feature
29er North American Championship - Day 1 in Kingston
Red Bull 49erFX: First look at the Olympic sailing venue at Rio
Fuerteventura Kiteboarding Grand Slam - Classic conditions on day 3
NYYC Race Week Part II images by Rolex/Daniel Forster
Drowning or electric shock? What you need to know to help save a life
BIC Techno 293 Worlds 2014 - Day 1
Six Metre European Championship - Blazing sunshine on opening day
National Sailing Hall of Fame to present Lifetime Achievement Award
International Moth Worlds: Greenhalgh and Rashley tied at the top
PWA Pozo World Cup - Fantastic finale determines winners
Six Metre Class British Open Championship - Llanoria and Valhalla win
Anna Tunnicliffe set to compete at the CrossFit Games
America's Cup: Oracle Team USA holds foiling camp at Wangi SC
Volvo Ocean Race: Abu Dhabi OR completes double Atlantic crossing
Volvo Ocean Race: Team SCA has a 'pull through day' off the Canaries
No tiller sailing - how to steer using just the sails + Video
International Moth Worlds: Three bullets in a row for Greenhalgh
U.S. Junior Women’s Singlehanded Championship - Sophia Reineke wins
BIC Techno 293 Worlds 2014 - Day 0 Opening
Fuerteventura World Cup - Slalom action highlights day 2   
2014 Governor's Cup - Sam Gilmour of RFBYC victorious again   
Farr 40 West Coast Champ - Skipper Alberto Rossi leads Enfant Terrible   
Flying Dutchman World Championships - Magyars are the Masters   
Final day shakes up standings at Cape Panwa Hotel Phuket Raceweek   
2014 -15 Volvo Ocean Race: Team Alvimedica pushing towards Southampton   
NYYC Race Week - Saving the best for last   
VX One North American Championship - Chris Alexander commands   
2014 Cape Panwa Hotel Phuket Raceweek - Waiting game on Day 3   
International Moth Worlds: Thunderstorms delay racing on Day 1   
Fuerteventura World Cup - Impressive tricks on day 1   
2014 Governor's Cup - Two former winners in the finals   
America's Cup: Iain Murray explains reasons for Australian withdrawal *Feature   
Wilson and Roble remain number one match racers in U.S.   
2014 ISAF Youth Match Racing World Championship - Set to start   
PWA Pozo World Cup - Moreno twins dominate home spot   
ISAF Youth Worlds - Record breaking regatta in Tavira + Video   
Melges 32 European Championship - Robertissima remains out front   
Farr 40 West Coast Championship - Italians take one-point lead   
Melges 32 European Championship - Day 3 images by Carlo Borlenghi   


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  http://www.sail-world.com/event_images/image/RSS-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 WAS US
LocalAds   DE  ES  FR  IT