Subscribe free to our newsletters via your
. Earth Science News .

Subscribe free to our newsletters via your

Aerosols Impact On Australia's Climate

Dr Rotstayn says recent research suggests that the influence of aerosols on recent climate trends in the Southern Hemisphere has been comparable to greenhouse gases.
by Staff Writers
Canberra, Australia (SPX) Aug 20, 2008
CSIRO Marine and Atmospheric Research scientist, Dr Leon Rotstayn, says the influence aerosols have on climate is still one of the 'great unknowns' in climate science.

"We recently identified that the extensive pollution haze emanating from Asia may be re-shaping rainfall patterns and monsoonal winds in northern Australia. Establishing the impacts of aerosols across the rest of the country presents a new research challenge," Dr Rotstayn says.

He was speaking on the eve of 'Something in the Air', an international workshop organised by CSIRO and the Bureau of Meteorology through the Australian Climate Change Science Program and that has attracted 60 participants. At the centre of workshop discussions on August 18 and 19 will be a just-published review in the International Journal of Climatology of how aerosols could be influencing climate in Australia.

Sources of human-generated aerosols include; smoke-stack emissions, vehicle emissions and vegetation burning. Natural aerosol sources include; volcanic eruptions, dust storms and ocean plankton.

Dr Rotstayn says recent research suggests that the influence of aerosols on recent climate trends in the Southern Hemisphere has been comparable to greenhouse gases.

"Evidence of this is found in recent CSIRO climate modelling, which shows that the Asian aerosol haze affects temperature gradients between Asia and Australia, and may have caused an increase in rainfall over north-western Australia," he says.

"Global ocean circulation provides another mechanism whereby aerosol changes in the Northern Hemisphere can affect climate in the Southern Hemisphere, suggesting an urgent need for further targeted studies using coupled ocean-atmosphere global climate models.

"In recent weeks, we had our first indication from CSIRO's climate model that Australian-sourced aerosols actively influence Australian climate and rainfall. Our latest simulations are much better at capturing natural rainfall variability over eastern Australia associated with the El Nino - La Nina cycle. Feedbacks due to Australian dust levels, which vary in tune with the natural El Nino cycle, appear to have improved the simulation of rainfall variability.

"To better model climate variability and climate change in the Australian region, more research is needed into aerosol sources, their atmospheric distributions, and how to incorporate these processes robustly in global climate models," Dr Rotstayn said.

Email This Article
Comment On This Article

Share This Article With Planet Earth DiggDigg RedditReddit
YahooMyWebYahooMyWeb GoogleGoogle FacebookFacebook

Related Links
CSIRO Marine and Atmospheric Research
Climate Science News - Modeling, Mitigation Adaptation

Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News

Climate Change May Boost Middle East Rainfall
Sydney, Australia (SPX) Aug 14, 2008
The prospect of climate change sparking food and water shortages in the Middle East is less likely than previously thought, with new research by an Australian climate scientist suggesting that rainfall will be significantly higher in key parts of the region.

  • Japan warns of iPod nano fire risk
  • 30 still missing after truck swept into river in Haiti
  • Teacher sent to labour camp for China quake photos
  • Over 600,000 evacuated as tropical storm hits China: reports

  • Aerosols Impact On Australia's Climate
  • Climate Change May Boost Middle East Rainfall
  • Purdue Researcher Identifies Climate Change Hotspots
  • Southern Ocean Seals Dive Deep For Climate Data

  • Saharan Dry, Dusty Air Lessened Intensity Of 2007 Hurricane Season
  • Ball Aerospace Begins Final Prep For NPOESS OMPS Instrument
  • Portrait Of A Warming Ocean And Rising Sea Levels
  • ESA Meets Increasing Demand For Earth Observation Data

  • Customers Evaluate VIASPACE Lithium Batteries For Light Electric Vehicles
  • Bosch Calls For Accelerating Development Of Alternative Energy Sources
  • Startech Environmental Receives Hydrogen Engine
  • Oil giant Shell evacuates 425 staff amid Tropical Storm Fay

  • Canopus Biopharma Chinese Researcher Team Up To Treat Avian Influenza
  • UN gives aid to Guinea Bissau to fight cholera epidemic
  • Uganda hepatitis epidemic toll rises to 110
  • War on AIDS: Money nightmare seems set to return

  • Birds can't keep up with climate change: study
  • Trees, Forests And The Eiffel Tower Reveal Theory Of Design In Nature
  • Cockroach King reigns as pest-killers discuss climate change
  • Big-Brained Animals Evolve Faster

  • Many US Public Schools In Air Pollution Danger Zone
  • Helsinki trash cans to thank bin users for not littering
  • Dirty Smoke from Ships Found To Degrade Air Quality In Coastal Cities
  • Manta UAVs Certified By Korean Civil Aviation Safety Authority

  • Desperate families snub corrupt police in Mexico kidnap epidemic
  • CSHL Neuroscientists Glimpse How The Brain Decides What To Believe
  • Large Reservoir Of Mitochondrial DNA Mutations Identified In Humans
  • Humans' Evolutionary Response To Risk Can Be Unnecessarily Dangerous

  • The content herein, unless otherwise known to be public domain, are Copyright 1995-2007 - SpaceDaily.AFP and UPI Wire Stories are copyright Agence France-Presse and United Press International. ESA Portal Reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement,agreement or approval of any opinions, statements or information provided by SpaceDaily on any Web page published or hosted by SpaceDaily. Privacy Statement