Featured Research

from universities, journals, and other organizations

A Simple Model For The Formation Of Ice Clouds

Date:
August 15, 2000
Source:
Max Planck Society
Summary:
Atmospheric ice clouds strongly affect both the chemistry and the radiant properties of the Earth. However, the formation of ice particles in the atmosphere through homogeneous ice nucleation is not fully understood.

Atmospheric ice clouds strongly affect both the chemistry and the radiant properties of the Earth. However, the formation of ice particles in the atmosphere through homogeneous ice nucleation is not fully understood. This is due to the fact that ice forms in aqueous aerosol droplets which can be composed of a great variety of constituents. Scientists from the Federal Institute of Technology Zurich (Switzerland) and the Max Planck Institute for Chemistry in Mainz (Germany) show that the formation of atmospheric ice particles can be described by a general thermodynamic model (Nature, 10 August 2000).

Using laboratory data on a large number of solutes, they show that ice nucleation is independent of the nature of the solute. The only important parameters required to describe ice particle formation are temperature and relative humidity. They further show that their model is in good agreement with recent observation of ice clouds.

These results should help to overcome one of the main weaknesses of numerical models of the atmosphere, the formulation of cloud processes. Important applications range from issues like denitrification and future ozone depletion in the Arctic polar stratosphere to the aerosol indirect effect due to homogeneously formed ice clouds in climate studies. The simplicity of the formulation makes it suitable not only for small scale process studies of individual clouds but also for global scale three-dimensional models.

The results of this study also have important implications in other areas of research. For example, the scientists show that solutes and applied pressure have a very similar effect on ice nucleation which might be important for the understanding of the physics of supercooled water and aqueous solutions. The results also challenge classical theories of nucleation of crystals from liquid solutions. Finally, the new ice nucleation model may also have implications in the field of cryobiology, because it sets a inferior limit to the freeze resistance of cells in plants and animals at low temperatures.


Story Source:

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


Cite This Page:

Max Planck Society. "A Simple Model For The Formation Of Ice Clouds." ScienceDaily. ScienceDaily, 15 August 2000. <www.sciencedaily.com/releases/2000/08/000811063645.htm>.
Max Planck Society. (2000, August 15). A Simple Model For The Formation Of Ice Clouds. ScienceDaily. Retrieved July 25, 2014 from www.sciencedaily.com/releases/2000/08/000811063645.htm
Max Planck Society. "A Simple Model For The Formation Of Ice Clouds." ScienceDaily. www.sciencedaily.com/releases/2000/08/000811063645.htm (accessed July 25, 2014).

Share This




More Earth & Climate News

Friday, July 25, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Goma Cheese Brings Whiff of New Hope to DRC

Goma Cheese Brings Whiff of New Hope to DRC

Reuters - Business Video Online (July 24, 2014) The eastern region of the Democratic Republic of Congo, mainly known for conflict and instability, is an unlikely place for the production of fine cheese. But a farm in the village of Masisi, in North Kivu is slowly transforming perceptions of the area. Known simply as Goma cheese, the Congolese version of Dutch gouda has gained popularity through out the region. Ciara Sutton reports. Video provided by Reuters
Powered by NewsLook.com
Bill Gates: Health, Agriculture Key to Africa's Development

Bill Gates: Health, Agriculture Key to Africa's Development

AFP (July 24, 2014) Health and agriculture development are key if African countries are to overcome poverty and grow, US software billionaire Bill Gates said Thursday, as he received an honourary degree in Ethiopia. Duration: 00:36 Video provided by AFP
Powered by NewsLook.com
Higgins Breaks Record at Mt. Washington

Higgins Breaks Record at Mt. Washington

Driving Sports (July 24, 2014) Subaru Rally Team USA drivers David Higgins and Travis Pastrana face off against a global contingent of racers at the annual Mt. Washington Hillclimb in New Hampshire. Includes exclusive in-car footage from Higgins' record attempt. Video provided by Driving Sports
Powered by NewsLook.com
Storm Kills Three, Injures 20 at Virginia Campground

Storm Kills Three, Injures 20 at Virginia Campground

Reuters - US Online Video (July 24, 2014) A likely tornado tears through an eastern Virginia campground, killing three and injuring at least 20. Linda So reports. Video provided by Reuters
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