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 October 22, 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 October 22, 2014).

Share This



More Earth & Climate News

Wednesday, October 22, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Traditional Farming Methods Gaining Ground in Mali

Traditional Farming Methods Gaining Ground in Mali

AFP (Oct. 20, 2014) He is leading a one man agricultural revolution in Mali - Oumar Diatabe uses traditional farming methods to get the most out of his land and is teaching others across the country how to do the same. Duration: 01:44 Video provided by AFP
Powered by NewsLook.com
How Detroit's Money Woes Led To U.N.-Condemned Water Cutoffs

How Detroit's Money Woes Led To U.N.-Condemned Water Cutoffs

Newsy (Oct. 20, 2014) The United Nations says water is a human right, but should it be free? Detroit has cut off water to residents who can't pay, and the U.N. isn't happy. Video provided by Newsy
Powered by NewsLook.com
Hey, Doc! Sewage, Beer and Food Scraps Can Power Chevrolet’s Bi-Fuel Impala

Hey, Doc! Sewage, Beer and Food Scraps Can Power Chevrolet’s Bi-Fuel Impala

3BL Media (Oct. 20, 2014) Hey, Doc! Sewage, Beer and Food Scraps Can Power Chevrolet’s Bi-fuel Impala Video provided by 3BL
Powered by NewsLook.com
White Rhino's Death In Kenya Means Just 6 Are Left

White Rhino's Death In Kenya Means Just 6 Are Left

Newsy (Oct. 20, 2014) Suni, a rare northern white rhino at Ol Pejeta Conservancy, died Friday. This, as many media have pointed out, leaves people fearing extinction. Video provided by Newsy
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:

Strange & Offbeat Stories


Plants & Animals

Earth & Climate

Fossils & Ruins

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