21Sep 2022 by Nigel Fleming No Comments
linkedin post 2020-11-19 05:14:31

linkedin post 2020-11-19 05:14:31

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WHY CLOUDS DON'T FALL. "Upward vertical motions, or updrafts, in the atmosphere also contribute to the floating appearance of clouds by offsetting the small fall velocities of their constituent particles. Clouds generally form, survive and grow in air that is moving upward. Even a large droplet having a radius of 100 microns has a fall velocity of only about 27 centimeters per second (cm/s). And because ice crystals have more irregular shapes, their fall velocities are relatively smaller." http://www.scientificamerican.com/article/why-do-clouds-float-when/ View in LinkedIn
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21Sep 2022 by Nigel Fleming No Comments

linkedin post 2020-11-19 05:17:13

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SUPERCOOLING. "Water droplets commonly remain as liquid water and do not freeze, even well below 0 °C (32 °F), because of the high surface tension of each microdroplet, which prevents them from expanding to form larger ice crystals. Without ice nuclei supercooled water droplets can exist down to about −40 °C (−40 °F), at which point they will spontaneously freeze." https://lnkd.in/dYECyJe View in LinkedIn
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21Sep 2022 by Nigel Fleming No Comments

linkedin post 2020-11-19 05:18:44

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CATALYSTS. "Clouds are a very special subset of the atmosphere because they present substantial amounts of condensed-phase water (liquid or solid) that can dissolve gases that would otherwise be present in the gas phase, and, as a consequence of condensed-phase reactions, permit reactions to occur that would not otherwise occur or would be much slower. In this sense "clouds may be considered to serve as catalysts of atmospheric reactions." https://lnkd.in/dHZs9ca View in LinkedIn
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21Sep 2022 by Nigel Fleming No Comments

linkedin post 2020-11-20 04:42:04

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SUSPENDED FLUFF. “Clouds consist of a suspension of liquid or solid (ice) particles in air. Thus, formally, a cloud is an aerosol, a suspension of particles in air. However, it is useful to distinguish clouds from clear-air (noncloud) "aerosols. The cloud environment is slightly supersaturated with respect to liquid water or ice, respectively.” https://lnkd.in/dHZs9ca View in LinkedIn
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21Sep 2022 by Nigel Fleming No Comments

linkedin post 2020-11-20 04:45:39

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COMBINED PHASES. “Formally speaking a cloud is an aerosol, that is a suspension of one phase of matter in another (A colloidal system in which the dispersed phase is composed of either solid or liquid particles, and in which the dispersion medium is some gas, usually air). A characteristic of an aerosol is that it is disperse. It is not one thing, but many things, or many repetitions of the same thing, dispersed in space.” https://lnkd.in/djhU_x4 View in LinkedIn
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21Sep 2022 by Nigel Fleming No Comments

linkedin post 2020-11-20 04:47:49

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GYRES. “Aerosols, and especially their effect on clouds and precipitation, are one of the key components of the climate system and the hydrological cycle. aerosols have a major impact on the dynamics, microphysics, and electrification properties of continental mixed-phase convective clouds." (Major review). https://lnkd.in/dinB_2a View in LinkedIn
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21Sep 2022 by Nigel Fleming No Comments

linkedin post 2020-11-20 04:49:46

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SUSPENSIONS. “Clouds form when the invisible water vapour in the air condenses into visible water droplets or ice crystals. There is water around us all the time in the form of tiny gas particles, also known as water vapour. There are also tiny particles floating around in the air - such as salt and dust - these are called aerosols.” https://lnkd.in/dmZsTC5 View in LinkedIn
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