Urea as an Ice Nucleant for Supercooled CloudsSource: Journal of the Atmospheric Sciences:;1966:;Volume( 023 ):;issue: 002::page 197Author:Knollenberg, Robert G.
DOI: 10.1175/1520-0469(1966)023<0197:UAAINF>2.0.CO;2Publisher: American Meteorological Society
Abstract: Urea was observed to have extraordinary ice nucleating properties in laboratory and natural clouds. Ice nucleation was induced in laboratory clouds at temperatures as warm as +6C. The nucleation mechanism involves the high endothermic heat of solution and high solubility of urea. Three field releases of urea in supercooled stratus resulted in marked visual transformation of the cloud and substantial snow showers. It is concluded that urea is an effective seeding reagent for supercooled clouds. In these experiments urea appeared to be equally effective as dry ice in causing shower formation.
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| contributor author | Knollenberg, Robert G. | |
| date accessioned | 2017-06-09T14:13:44Z | |
| date available | 2017-06-09T14:13:44Z | |
| date copyright | 1966/03/01 | |
| date issued | 1966 | |
| identifier issn | 0022-4928 | |
| identifier other | ams-15184.pdf | |
| identifier uri | http://onlinelibrary.yabesh.ir/handle/yetl/4150828 | |
| description abstract | Urea was observed to have extraordinary ice nucleating properties in laboratory and natural clouds. Ice nucleation was induced in laboratory clouds at temperatures as warm as +6C. The nucleation mechanism involves the high endothermic heat of solution and high solubility of urea. Three field releases of urea in supercooled stratus resulted in marked visual transformation of the cloud and substantial snow showers. It is concluded that urea is an effective seeding reagent for supercooled clouds. In these experiments urea appeared to be equally effective as dry ice in causing shower formation. | |
| publisher | American Meteorological Society | |
| title | Urea as an Ice Nucleant for Supercooled Clouds | |
| type | Journal Paper | |
| journal volume | 23 | |
| journal issue | 2 | |
| journal title | Journal of the Atmospheric Sciences | |
| identifier doi | 10.1175/1520-0469(1966)023<0197:UAAINF>2.0.CO;2 | |
| journal fristpage | 197 | |
| journal lastpage | 201 | |
| tree | Journal of the Atmospheric Sciences:;1966:;Volume( 023 ):;issue: 002 | |
| contenttype | Fulltext |