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Meterology
- 1. Atmosphere & Meterology Cloud above Shanghai, China.
- 2. Meteorology The scientific study of the atmosphere. Li Wenbo, PLA hydrometeorologist, at work in Nansha, China.
- 3. Weather The day to day condition of the atmosphere. This includes temperature, rainfall and wind. Monsoonal rain, Burma.
- 4. Climate Weather pattern of a place over a long period (maybe 30 years or more). Humidity, Malaysia.
- 5. Why study the weather? • Advance warnings of extreme events • Planning • Comfort: People like to know whether to take umbrella, wear warm coat…. • Climate change
- 6. July - different places - different weather • Port Blair, India • 400mm • Hot 25 to 27 degrees C • Humid • Canberra, Aust. • 50mm • Cold -1 to 10 degrees C • Frost
- 7. It’s all about Energy • Energy from the sun • Storage of energy • Redistribution of energy
- 13. Pressure Gradient - Isobars
- 15. Cyclones – severe low pressure Northern Hemisphere – Near Iceland Southern Hemisphere – Near Cairns, Australia
- 16. Meterology
- 24. Real time weather • Radar
- 26. Weather in Asia is Influenced by • Large continental land mass • Large Mountains - Himalayas • Oceans Anapurna, Nepal.
- 28. Winter
- 29. Summer
- 35. Cyclone Haiyan off Phillipines, Nov. 2008
- 36. Cyclone Haiyan off Phillipines, Nov. 2008
- 39. Philippines
- 43. For Asian weather • http://weather.org/asia.htm
Editor's Notes
- Some terms to start with
- Why is weather different in different parts of the world?
- Sun’s rays most heat and energy where they have travelled shorter distance – at equator (spring and autumn equinox)
- Earth hotter at equator than at poles
- Difference in temperature causes differences in atmospheric pressure which leads to atmospheric circulation. Low pressure just means less air per sq km
- It is actually a little more complicated but same principle applies!
- Heating of earth/ sea creates areas of high and low pressure. Just remember – hot air rises – making less pressure on the surface. Therefore a low pressure. Atmospheric circulation - Air moves from high pressure to low pressure. Creates weather!!! Very important for air circulation and energy transfer around the Earth.
- Lines on the weather map with numbers join places of equal pressure and are called isobars
- One other point – air moves in different directions around lows and highs, depending which hemisphere you are in.
- Northern hemisphere – low moving in anticlock wise direction. Southern hemisphere – low moving in clockwise direction
- Advanced techniques of meterology – can now see radar, water temp etc, real time thunderstorms etc .. Have a look at bureau of meteorology website.
- Earth is tilted at 23.5 degrees to verticle
- As we have seen - Weather is often presented on a chart. Synoptic chart for Australia Tuesday 17 March 2015 – note highs, lows, tropical cyclone Nathan, cold front
- Some important symbols on weather chart. Isobars – line joining places of equal pressure
- Bom site
- Summer land gets hot – hot air rises – makes low pressure at ground level. Air moves from higher pressure to lower. Reverse in winter.
- Winter weather patterns – Asia this is what it looks like
- Summer weather patterns – note strong winds from ocean to land – cyclone season and monsoon season
- Is this a summer or winter weather pattern for Asia?
- Monsoon arriving in India
- Cyclone Haiyan off Phillipines Nov 2008
- Typhoon Haiyan over the Phillipines in November 2008
- Cyclones can cause severe flooding