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New insights into cloud formation
Date:3/5/2012

n", she says.

Temperatures of -100 degrees

It is not easy to measure the heat capacity of clusters, and an important part of her research has been to develop a method that can be used in future studies. Put simply, you could say that she has created water clusters in air, drawn them into a vacuum, and then examined them as they disintegrate. This method led her to an unexpected discovery.

"The temperature inside these clusters was around -100 C, so one would expect that their heat capacity would correspond to that of ice. Despite this, the heat capacity of medium-sized clusters was greater, intermediate between that of ice and liquid water. The importance of this for how clouds form will be the subject of further research", she says.

New insights into space clouds

Erika Sundn presents in her thesis also studies into the cooling rate and radiation of carbon particles, which may be a component of space clouds. It has long been uncertain whether molecules can exist in the empty space between the stars and planets, since the density of atoms is so low. The first negatively charged carbon molecules were discovered in 2006, however, after which work has continued surveying the molecules that are present in space clouds.

"First radiation from space is measured, and then it's a case of creating models that can explain the observations. We create in the lab charged molecules that may be present in these clouds, and investigate whether these molecules emit radiation and, if so, to what extent", she says.


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Contact: Erika Sundn
erikasunden@gmail.com
46-706-555-233
University of Gothenburg
Source:Eurekalert  

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