Stamp: Cloud (Hong Kong 2014)
Cloud (Hong Kong 2014)
27 March (Hong Kong ) within release Weather Phenomena goes into circulation Stamp Cloud face value 2.90 Hong Kong dollar
| Stamp Cloud in catalogues | |
|---|---|
| Michel: | Mi:HK 1879 |
Stamp is square format.
A cloud is formed when water vapour rises through the atmosphere and cools. A cloud is a mass of water droplets or ice crystals formed by the cooling and condensation of the lifted water vapour aloft. The stamp shows lenticular clouds in the sky over an urban area of Hong Kong. As air rises on the lee side of a mountain, water vapour condenses into water droplets, which accumulate and develop into lenticular clouds, taking the shape of a pile of saucers or lenses.Also in the issue Weather Phenomena:
- Stamp - Rainbow face value 1.70;
- Stamp - Frost face value 2.20;
- Stamp - Cloud face value 2.90;
- Stamp - Lightning face value 3.10;
- Stamp - Fog face value 3.70;
- Stamp - Rain face value 5;
- Stamp - Typhoon face value 5;
- Souvenir Sheet - Typhoon face value 20;
- Souvenir Sheet - Typhoon face value 5;
- Souvenir Sheet - Typhoon face value 20;
- Booklet - Weather Phenomena face value 53;
Stamp Cloud it reflects the thematic directions:
Meteorology is a branch of the atmospheric sciences (which include atmospheric chemistry and physics) with a major focus on weather forecasting. The study of meteorology dates back millennia, though significant progress in meteorology did not begin until the 18th century. The 19th century saw modest progress in the field after weather observation networks were formed across broad regions. Prior attempts at prediction of weather depended on historical data. It was not until after the elucidation of the laws of physics, and more particularly in the latter half of the 20th century, the development of the computer (allowing for the automated solution of a great many modelling equations) that significant breakthroughs in weather forecasting were achieved. An important branch of weather forecasting is marine weather forecasting as it relates to maritime and coastal safety, in which weather effects also include atmospheric interactions with large bodies of water.
