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















America's Cup: Alameda makes overtures on Venue hosting for San Fran *Feature by Richard Gladwell/Sail-World.com/nz,








































2014 Pacific Cup - Scarlet Runner wins by Vanessa Yates, Hawaii












Herreshoff Marine Museum announces successful fundraising campaign
Brewin Dolphin Commodores' Cup - The most comprehensive victory yet
Anna Tunnicliffe holds fourth at mid-point of Reebok CrossFit Games
2014 29er North American Open Championship - Australians win
INSA Sabot II Invitational Regatta - Erik Hou claims victory
CMRC Summer Invitational Series - Maxi Soh wins Doubleheader A event
International Moth World Championships - Nathan Outteridge wins
PWA Fuerteventura Grand Slam - First blood to Toselli and Angulo
Melges 24 Nationals - Record entries for 2014 and 2015 venue revealed
Women’s Match Race Golfe du Morbihan - Anna Kjellberg claims the lead
Jessica Uniack Memorial Beach to Bay Race at Long Beach YC
Laser Radial Men’s World Championship - Poland tops the leaderboard
America's Cup - Four teams confirm full support regardless of venue
Plastic Classic takes place at Mariposa Hunters Point YC
Six Metre European Championship - No champion declared for 2014
J/Teams sail tough Chicago Mackinac Race
Anna Tunnicliffe wins first event of Reebok Cross Fit Games + Video
2014 Pacific Cup - Skill and luck required for victory
Six Metre European Championship - Action resumes on day 4
BIC Techno 293 Worlds 2014 - Day 4
PWA Fuerteventura Grand Slam on the horizon   
Rolex Big Boat Series - Golden Jubilee to take place this September   
DH Pacific Cup - Running with the pack + Video   
Women's Match Race Golfe du Morbihan - Testing day in Vannes   
Brewin Dolphin Commodores' Cup - Ireland establishes solid lead   
International Moth Worlds: Outteridge charges into the lead + Video   
Marina Rubicón Round Canary Islands Race - First blood to Team Brunel   
ISAF Youth Match Racing Worlds - Competition heats up on day 2   
Laser Radial World Championships - Competition aplenty on day 3 +Video   
Extreme Sailing Series - Penultimate Act to take place in Nice   
Leukemia Cup - Images by Leighton O'Connor   
Maxi Yacht Rolex Cup - Meeting of the grand designs   
29er North American Championship - Final series kicks off   
29er World Championship 2014 set to start in Kingston, Ontario   
Barcelona and Parnu chosen for 2015 ORC championship events   
2014 Race for Rady Yacht Race - Benefiting Rady Children’s hospital   
CMRC Summer Invitational Series - Doubleheader events start tomorrow   
BIC Techno 293 Worlds 2014 - Day 3   
Sailing through STEM Night at California YC   
Six Metre European Championship - High temps and little wind on day 3   


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 NEW US
LocalAds   DE  ES  FR  IT