Stamp: Lightning (Hong Kong 2014)
Lightning (Hong Kong 2014)
27 March (Hong Kong ) within release Weather Phenomena goes into circulation Stamp Lightning face value 3.10 Hong Kong dollar
| Stamp Lightning in catalogues | |
|---|---|
| Michel: | Mi:HK 1880 |
Stamp is square format.
Lightning is an atmospheric electric discharge phenomenon. In an unstable and moist atmosphere, water droplets and ice pellets in clouds will become electrically charged in a convective motion. When the building up of charges reaches a certain threshold, discharges take place between clouds or between clouds and the earth’s surface. The stamp depicts cloud-to-ground lightning in the night sky of Hong Kong. Cloud-to-ground lightning, a lightning discharge between a cumulonimbus cloud and the ground, poses a greater threat to people and facilities on the ground.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 Lightning 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.
