Featured Research

from universities, journals, and other organizations

Removing Some Cloud Seeds Of Doubt: Long-term Cloud Seeding In Tasmania Shows Promising Increase In Rainfall

Date:
February 4, 2009
Source:
Monash University
Summary:
A new analysis of precipitation records from the long-term cloud seeding operation in Tasmania shows a promising increase in rainfall during periods of seeding.

Tasmania's Cradle Mountain rises above Dove Lake. A new analysis of precipitation records from the long-term cloud seeding operation in Tasmania shows a promising increase in rainfall during periods of seeding.
Credit: iStockphoto/Linda & Colin McKie

A team of researchers at Monash University has released a new analysis of precipitation records from the long-term cloud seeding operation in Tasmania that shows a promising increase in rainfall during periods of seeding.

The team worked with Hydro Tasmania analysing the cloud seeding activity over the hydroelectric catchment area in central Tasmania for more than four decades – from 1960 – 2005.

Associate Professor Steven Siems, Faculty of Science said the analysis used monthly rainfall figures in the catchment area where the seeding took place and compared it with data from nearby control areas.

"A number of independent statistical tests showed a consistent increase of at least 5% in monthly rainfall over the catchment area. This is the first time that an independent analysis of cloud seeding data over several decades has shown a statistically significant increase in rainfall," Associate Professor Siems said.

However, the team of Monash scientists have also cautioned against becoming too excited by the initial results.

Anthony Morrison, a PhD candidate on this research said the clouds over the Southern Ocean and Tasmania are unique in that they can contain vast amounts of supercooled liquid water and are unusually clean.

"They're really not comparable to clouds that have been seeded anywhere else in the world. Further field measurements of cloud microphysics over the region are needed to provide a physical basis for these statistical results," Mr Morrison said.

Associate Professor Siems said the statistical analysis of the data suggests positive results from cloud seeding but more research needs to be done.

"We need to support our findings with a greater scientific understanding. There could be other explanations for the increased rainfall – although we suspect that cloud seeding is a significant contributor," Associate Professor Siems said.

The practice of cloud seeding remains a contentious issue in the scientific community with many attempts having been made since the beginning of cloud seeding programs in the 1940s to measure and explain rainfall levels. Tasmania has long been a location for cloud seeding programs, following apparent success with the programs in the 1960's and 1970's when significant rainfall increases of more than 30 per cent were measured and reported by CSIRO scientists.


Story Source:

The above story is based on materials provided by Monash University. Note: Materials may be edited for content and length.


Cite This Page:

Monash University. "Removing Some Cloud Seeds Of Doubt: Long-term Cloud Seeding In Tasmania Shows Promising Increase In Rainfall." ScienceDaily. ScienceDaily, 4 February 2009. <www.sciencedaily.com/releases/2009/02/090202103012.htm>.
Monash University. (2009, February 4). Removing Some Cloud Seeds Of Doubt: Long-term Cloud Seeding In Tasmania Shows Promising Increase In Rainfall. ScienceDaily. Retrieved July 31, 2014 from www.sciencedaily.com/releases/2009/02/090202103012.htm
Monash University. "Removing Some Cloud Seeds Of Doubt: Long-term Cloud Seeding In Tasmania Shows Promising Increase In Rainfall." ScienceDaily. www.sciencedaily.com/releases/2009/02/090202103012.htm (accessed July 31, 2014).

Share This




More Earth & Climate News

Thursday, July 31, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Visitors Feel Part of the Pack at Wolf Preserve

Visitors Feel Part of the Pack at Wolf Preserve

AP (July 31, 2014) Seacrest Wolf Preserve on the northern Florida panhandle allows more than 10,000 visitors each year to get up close and personal with Arctic and British Columbian Wolves. (July 31) Video provided by AP
Powered by NewsLook.com
Florida Panther Rebound Upsets Ranchers

Florida Panther Rebound Upsets Ranchers

AP (July 31, 2014) With Florida's panther population rebounding, some ranchers complain the protected predators are once again killing their calves. (July 31) Video provided by AP
Powered by NewsLook.com
Big Waves In Arctic Ocean Threaten Polar Ice

Big Waves In Arctic Ocean Threaten Polar Ice

Newsy (July 30, 2014) Big waves in parts of the Arctic Ocean are unprecedented, mainly because they used to be covered in ice. Video provided by Newsy
Powered by NewsLook.com
Raw: Thousands Flocking to German Crop Circle

Raw: Thousands Flocking to German Crop Circle

AP (July 30, 2014) Thousands of people are trekking to a Bavarian farmer's field to check out a mysterious set of crop circles. (July 30) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins