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Record-breaking rainbow in Taiwan theWeather Club Mon, 04/12/2017 - 13:02

A rainbow, reportedly lasting nearly 9 hours, has been witnessed over the Chinese Culture University in the mountains of Taipei.

Prof Chou, Prof Liu Ching-huang and students documented the rainbow. Their observations, pictures and video recordings showed the rainbow lasted from 06:57 until 15:55 – totalling eight hours and 58 minutes.

If confirmed by Guinness World Records, it would obliterate the previous record for the longest-lasting rainbow, set in Yorkshire, England, on 14 March 1994, which lasted from 09:00 to 15:00. Rainbows typically last much less than an hour.

Mount Agung and its potential global impacts

Since mid-November, Mount Agung on the Indonesian Island of Bali has been emitting steam and ash, lava is visible in the crater and rivers of mud have been flowing down its sides.  However, Agung is capable of a much more explosive eruption, which would have a much greater impact both locally and globally. The more explosive the eruption, the higher the volcanic ash, sulphur gases and other debris is pushed into the atmosphere. Agung last erupted in 1963, having been dormant for over a century.

Flash floods hit Greece

Heavy overnight rain on 15th November caused flash flooding in parts of Greece, particularly Mandra, Nea Peramos and Megara, west of Athens.

At least 15 people have been killed and it has caused widespread destruction in central Greece as people were unprepared for the fast-flowing torrents of red mud that flooded the roads and thousands of homes. The sheer force of the water moved vehicles, damaged walls and roofing.

 

SWITCH competition theWeather Club Wed, 15/11/2017 - 10:40

The Surface Weather Instrument Technology Challenge (SWITCH): Can you design and build an instrument for no more than £50?

2017 Hurricanes and Aerosols Simulation theWeather Club Wed, 15/11/2017 - 09:56

NASA have produced a very impressive visualisation showing different aerosols in the atmosphere; smoke, sea salt, and dust. Smoke, sea salt, and dust are important for cloud formation and precipitation, whilst smoke and dust have a significant impact on human health.

WMO: 2017 expected to be third hottest year on record

The World Meteorological Organization (WMO) released its provisional Statement on the State of the Climate this week, estimating that 2017 is likely to be one of the warmest years for global average surface temperature, with many high-impact events including catastrophic hurricanes, floods, heatwaves and droughts.  The Statement was released on the opening day of the United Nations climate change conference in Bonn.

Atlantic hurricanes: Irma and Maria

On Tuesday 5th September, Hurricane Irma developed into one of the Atlantic’s most powerful storms. The category 5 hurricane - highest category storm on the Saffir-Simpson scale (a commonly used scale that attempts to measure potential property damage from storm winds) - had wind speeds around 185 mph, matching those of Wilma in 2005 which killed 87 people and cost  billions of dollars in damage.