> Powerboat-World.com
 
 
News Home Video Gallery Newsletters FishingBoating Features Photo Gallery Sail-World Australia Australian Cruising
MarineBusiness-World

 

Sail-World.com : Aerosols – their part in our rainfall

Aerosols – their part in our rainfall

'CSIRO atmosphere expert, Dr Leon Rotstayn. Photo: Bruce Miller'    © Copyright CSIRO Australia
Aerosols may have a greater impact on patterns of Australian rainfall and future climate change than previously thought, according to leading atmospheric scientist, CSIRO’s Dr Leon Rotstayn.

'We have identified that the extensive pollution haze emanating from Asia may be re-shaping rainfall patterns in northern Australia but we wonder what impact natural and human-generated aerosols are having across the rest of the country,' Dr Rotstayn said.

Aerosols are fine particles suspended in the atmosphere. Sources of human-generated aerosols include industry, motor vehicles and vegetation burning. Natural sources include volcanoes, dust storms and ocean plankton. Human-generated aerosols have long been known to exert a cooling effect on climate. This has partly masked the warming effect of increasing greenhouse gases. As aerosol pollution is predicted to decrease over the next few decades, unmasking of the greenhouse effect may lead to accelerated global warming.

However, in an address to the International Conference on Southern Hemisphere Meteorology and Oceanography in Melbourne, Dr Rotstayn said aerosols are much more than a 'negative greenhouse gas' because they can actively force changes in winds and ocean currents by altering the distribution of solar heating at the earth’s surface.

'We have identified that the extensive pollution haze emanating from Asia may be re-shaping rainfall patterns in northern Australia but we wonder what impact natural and human-generated aerosols are having across the rest of the country,'

Dr Rotstayn said 'Recent climate modelling at CSIRO shows that there may be important effects on Australian climate due to aerosol pollution from the Northern Hemisphere. These include an increase of rainfall in north-western Australia, and an increase of air pressure over southern Australia, which may have contributed to less rainfall there.

'New simulations with the CSIRO climate model also show big improvements in the simulation of El Niño and the associated natural rainfall variability over eastern Australia, when natural and human-generated aerosols are included in the model. Natural aerosol includes Australian dust, which may be the key factor that improved our simulation. A realistic simulation of natural rainfall variability is essential if a climate model is to be used to improve our understanding of Australian rainfall changes.'

Dr Rotstayn said that further research into how aerosols are influencing climate and rainfall patterns across Australia is critical to scientists’ ability to more accurately predict the longer-term effects of climate change.

'It is crucial to quantify the relative roles of different drivers of recent Australian rainfall changes. A rainfall decline attributed to natural variability will be a passing phenomenon, and changes forced by human-generated aerosols are likely to be more short-term than changes forced by increasing greenhouse gases. The implications for decision makers will be very different, depending on whether the drivers are long-term or short-term,' Dr Rotstayn said.

The Centre for Australian Weather and Climate Research (CAWCR) - http://www.cawcr.gov.au/research/spcv/research_areas.php

http://www.csiro.com.au




by CSIRO

  

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

http://www.powerboat-world.com/index.cfm?nid=54041

1:20 AM Tue 17 Feb 2009 GMT






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:

27 Nov 2013  World Oceans Day appeals for funds
16 Nov 2013  Gigantic iceberg sails north from the Antarctic
09 Nov 2013  Sailing and swimming with manatees - Oceans Watch Essay
01 Nov 2013  OceansWatch: cruising sailors give something back in the South Pacific
23 Oct 2013  'The Ocean is Broken' - without fish, there can be no birds
13 Oct 2013  PlanetSolar reaches Paris after successful ocean study
02 Oct 2013  Monaco Yacht Show goes Green
07 Sep 2013  Great Pacific Garbage Patch - the real story
03 Sep 2013  World's largest solar yacht drops anchor after marine science quest
25 Aug 2013  Boat owners: cover vessels to deter seagulls
MORE STORIES ...

Power Boat News









Yamaha inspires students to succeed by Yamaha Motor Australia,








Swan celebrates sales success *Feature by Jeni Bone,




Polar research: Six priorities for Antarctic science by Mahlon C. Kennicutt II and colleagues,


Stealth i14 out of China by Neil Patchett,












































NSW Environment Minister awards 'Fish Friendly' Marina Accreditations
Refurbished Protector project 'better than buying new'
Gold Coast International Marine Expo - High-Diver Steve Black is back
4x4 Outdoors Show, Fishing and Boating Expo - Campfire cooking corner
See the heat with FLIR ONE *Feature
John Temple to retire, Will Sangster appointed General Manager
Multihull Central launches Aquila range at SIBS *Feature
If all else fails read the instructions!!
If all else fails read the instructions!!
Sun shines on recreational boating at Sydney International Boat Show
Phuket Yacht Show: new kid on the block taking on PIMEX? *Feature
2014 Offshore Superboat Championships - The boats are back!
Sydney International Boat Show - Days 3 & 4 *Feature
Kirby Marine launch 13metre Naiad Tender
Shellfish reefs in Port Phillip Bay to be rejuvenated
2014 Brisbane Boat Show - What's your trailer boat worth?
Custom exhaust system solves buoyancy problem
Sydney International Boat Show - Day 2 *Feature
Marine Rescue volunteers celebrate new unit and $120,000 vessel
Sydney International Boat Show - images from Day 1 *Feature
Pantaenius Insurance - being seen in yellow, green and orange *Feature   
Sydney International Boat Show begins!   
Sydney International Boat Show - Changed conditions on Sydney Harbour   
Fraser Island annual fishing closure starts August 1   
Mildura boaters reminded Murray River will be low until mid August   
Gold Coast Broadwater no closer to welcoming supermaxis *Feature   
Sydney International Boat Show - all systems go!   
UK superyacht industry on the rise   
EOMAP modelling shows what's under our water   
Great Barrier Reef in a bad state, and getting worse   
Gold Coast International Marine Expo - Organisers add extra sites   
Series Point’s Championship - Formula Two team secures a second place   
Marine Rescue volunteers called to rescue second vessel out of fuel   
Predictwind helps you pick the best time to depart   
Marine Rescue volunteers rescue seven in marathon operation   
Watch this whale lift a Kayak clear out of the water   
Clipper Motor Yachts expands with Boat Equity   
Check out the Fountaine Pajot Saba 50 at Autumn boat shows   
Brisbane's biggest outdoors expo to celebrate ten years   
Vietnam Marina Development: ONE°15 Vung Ro Bay Marina Resort   


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/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 PBW
LocalAds   DE  ES  FR  IT