Nucleation - Revision history

Novia at 11:28, 25 February 2022

2022-02-25T11:28:15Z

← Older revision		Revision as of 13:28, 25 February 2022
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	<ref>Pruppacher, H. R. et al. (1998) Microphysics of Clouds and Precipitation. Aerosol Science and Technology. [Online] 28 (4), 381–382.</ref>		<ref>Pruppacher, H. R. et al. (1998) Microphysics of Clouds and Precipitation. Aerosol Science and Technology. [Online] 28 (4), 381–382.</ref>

	Most cloud and fog drops do not freeze at 0°C; they supercool, and remain liquid. Supercooled drops are metastable, they do not freeze unless they strike objects or encounter a freezing nuclei such as an ice crystal.		Most cloud and fog drops do not freeze at 0°C; they supercool, and remain liquid. Supercooled drops are metastable, they do not freeze unless they strike objects or encounter a freezing nuclei such as an ice crystal. <ref>Charles C. Ryerson. April 2013. Icing Management for Coast Guard Assets. Cold Regions Research and Engineering Laboratory. ERDC/ C R R E L TR-13-7.</ref>

			== References ==

Novia at 11:27, 25 February 2022

2022-02-25T11:27:34Z

← Older revision		Revision as of 13:27, 25 February 2022
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	<ref>Pruppacher, H. R. et al. (1998) Microphysics of Clouds and Precipitation. Aerosol Science and Technology. [Online] 28 (4), 381–382.</ref>		<ref>Pruppacher, H. R. et al. (1998) Microphysics of Clouds and Precipitation. Aerosol Science and Technology. [Online] 28 (4), 381–382.</ref>

			Most cloud and fog drops do not freeze at 0°C; they supercool, and remain liquid. Supercooled drops are metastable, they do not freeze unless they strike objects or encounter a freezing nuclei such as an ice crystal.

Novia at 08:34, 11 February 2022

2022-02-11T08:34:17Z

← Older revision		Revision as of 10:34, 11 February 2022
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	'''Nucleation''' is a crystallization process. Water needs a solid point to freeze into ice, so pure water drops do not freeze. Once they touch the surface, the drops start freezing immediately.		'''Nucleation''' is a crystallization process. Water needs a solid point to freeze into ice, so pure water drops do not freeze. Once they touch the surface, the drops start freezing immediately.

	<ref>Pruppacher, H. R. et al. (1998) Microphysics of Clouds and Precipitation. Aerosol Science and Technology. [Online] 28 (4), 381–382.</ref> <ref>Will it rain, sleet or snow?, Weather.Gov, webpage, available (accessed 29.2.2021): <nowiki>https://www.weather.gov/source/zhu/ZHU_Training_Page/winter_stuff/winter_w</nowiki> x/winter_wx.html</ref>		<ref>Pruppacher, H. R. et al. (1998) Microphysics of Clouds and Precipitation. Aerosol Science and Technology. [Online] 28 (4), 381–382.</ref>

Novia at 08:22, 11 February 2022

2022-02-11T08:22:11Z

← Older revision		Revision as of 10:22, 11 February 2022
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	'''Nucleation''' is a crystallization process. Water needs a solid point to freeze into ice, so pure water drops do not freeze. Once they touch the surface, the drops start freezing immediately. Freezing rain happens when frozen raindrops pass through a warm layer of air. This causes the drops to melt. Then the drops need to go again through freezing air, where their temperature falls below freezing, but they remain liquid.		'''Nucleation''' is a crystallization process. Water needs a solid point to freeze into ice, so pure water drops do not freeze. Once they touch the surface, the drops start freezing immediately.

	<ref>Pruppacher, H. R. et al. (1998) Microphysics of Clouds and Precipitation. Aerosol Science and Technology. [Online] 28 (4), 381–382.</ref> <ref>Will it rain, sleet or snow?, Weather.Gov, webpage, available (accessed 29.2.2021): <nowiki>https://www.weather.gov/source/zhu/ZHU_Training_Page/winter_stuff/winter_w</nowiki> x/winter_wx.html</ref>		<ref>Pruppacher, H. R. et al. (1998) Microphysics of Clouds and Precipitation. Aerosol Science and Technology. [Online] 28 (4), 381–382.</ref> <ref>Will it rain, sleet or snow?, Weather.Gov, webpage, available (accessed 29.2.2021): <nowiki>https://www.weather.gov/source/zhu/ZHU_Training_Page/winter_stuff/winter_w</nowiki> x/winter_wx.html</ref>

Novia at 10:48, 17 December 2021

2021-12-17T10:48:33Z

← Older revision		Revision as of 12:48, 17 December 2021
Line 1:		Line 1:
	Nucleation is a crystallization process. Water needs a solid point to freeze into ice, so pure water drops do not freeze. Once they touch the surface, the drops start freezing immediately. Freezing rain happens when frozen raindrops pass through a warm layer of air. This causes the drops to melt. Then the drops need to go again through freezing air, where their temperature falls below freezing, but they remain liquid.		'''Nucleation''' is a crystallization process. Water needs a solid point to freeze into ice, so pure water drops do not freeze. Once they touch the surface, the drops start freezing immediately. Freezing rain happens when frozen raindrops pass through a warm layer of air. This causes the drops to melt. Then the drops need to go again through freezing air, where their temperature falls below freezing, but they remain liquid.

	<ref>Pruppacher, H. R. et al. (1998) Microphysics of Clouds and Precipitation. Aerosol Science and Technology. [Online] 28 (4), 381–382.</ref> <ref>Will it rain, sleet or snow?, Weather.Gov, webpage, available (accessed 29.2.2021): <nowiki>https://www.weather.gov/source/zhu/ZHU_Training_Page/winter_stuff/winter_w</nowiki> x/winter_wx.html</ref>		<ref>Pruppacher, H. R. et al. (1998) Microphysics of Clouds and Precipitation. Aerosol Science and Technology. [Online] 28 (4), 381–382.</ref> <ref>Will it rain, sleet or snow?, Weather.Gov, webpage, available (accessed 29.2.2021): <nowiki>https://www.weather.gov/source/zhu/ZHU_Training_Page/winter_stuff/winter_w</nowiki> x/winter_wx.html</ref>

Novia: nucleation new

2021-12-17T10:47:19Z

nucleation new

New page

Nucleation is a crystallization process. Water needs a solid point to freeze into ice, so pure water drops do not freeze. Once they touch the surface, the drops start freezing immediately. Freezing rain happens when frozen raindrops pass through a warm layer of air. This causes the drops to melt. Then the drops need to go again through freezing air, where their temperature falls below freezing, but they remain liquid.

<ref>Pruppacher, H. R. et al. (1998) Microphysics of Clouds and Precipitation. Aerosol Science and Technology. [Online] 28 (4), 381–382.</ref> <ref>Will it rain, sleet or snow?, Weather.Gov, webpage, available (accessed 29.2.2021): <nowiki>https://www.weather.gov/source/zhu/ZHU_Training_Page/winter_stuff/winter_w</nowiki> x/winter_wx.html</ref>