BBC:火山灰散去，英各大机场航班恢复

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根据BBC报道，英国各大机场上空的火山灰已经散去，航班陆续恢复，仅有少部分飞德国的航班被取消。

[来源:BBC 5月25日]

http://www.bbc.co.uk/news/uk-13536357

Volcanic ash disruption: UK flights resume



Fiona Trott and Richard Thomas assess the mood among passengers in Edinburgh and Newcastle.

Most flights have resumed across the UK after a day that saw thousands of passengers affected by an ash cloud from the erupting Icelandic volcano.

Air traffic control company Nats said harmful concentrations of ash dispersed from UK airspace overnight.

But some flights within the UK and a number to Germany will be cancelled.

Ash might return to affect much of the country on Friday with the potential to disrupt flights as the bank holiday get away begins, the Met Office has warned.

Services in and out of Scotland, Northern Ireland and northern England were hit on Tuesday as about 500 flights were cancelled across Europe.

Nats said UK airspace was expected to remain clear until 1900 BST on Wednesday.

Germany's Meteorological Service said airspace over the country's northern cities, including Bremen and Hamburg, would close from 0400 BST (0500 local time) because of elevated levels of ash in the atmosphere, prompting cancellations by some airlines in the UK.

They include BA, Easyjet, bmi and KLM, which is also cancelling some flights to Norway and Sweden.
Clearer picture

Forecasters said that if eruptions from the Grimsvotn volcano continued at "current variables", all areas with the exception of East Anglia and south-west England might be affected by ash on Friday.

The Met Office said the concentration of volcanic ash in the UK's airspace was expected to decrease significantly throughout Wednesday.

Transport Secretary, Phillip Hammond, said modelling by the Met Office and the Civil Aviation Authority should provide a clearer picture soon.

"Information's coming in all the time from satellite imagery... for example, BA have just told us this morning the results of the test flight that they did yesterday.

"All of this data gets fed into the model to refine it and we'll be working very hard to see if we can shrink down the red area predicted for Friday."

On Tuesday, dozens of planes were grounded at UK airports including Glasgow, Edinburgh, Newcastle, Barra, Prestwick, Cumbernauld, Londonderry, Tiree, Carlisle and Durham Tees Valley.

Airports say they are hoping to resume normal services but have warned of possible delays and passengers are advised to check with their airline before travelling.

The UK's emergency response committee, Cobra, met on Tuesday to discuss the knock-on effects of the ash cloud.

The Civil Aviation Authority (CAA) divides the airspace into areas of high, medium and low-density ash. Airlines wishing to fly in areas of medium or high-density ash need to put a safety case to the authority and have it accepted.
A map showing the predicted path of the ash cloud

The CAA said earlier that, although no airlines had applied to fly in high-density ash, some had been given permission to fly in medium density.

Willie Walsh, head of International Airlines Group, the parent company of BA and the Spanish carrier Iberia, said a 45-minute test flight on Tuesday at different altitudes over Scotland in the red zone had shown there was no risk to aircraft.

"The aircraft then returned and has been examined. All the filters have basically been removed, they will be sent to laboratories for testing. The simple answer is we found nothing.

"We've conducted video borescoping of the engine, where, similar to what you'd see on a medical programme, we inserted a borescope into the engine to check the inside of the engine and found no evidence of volcanic ash."

Tuesday's cancellations came just over a year after another volcanic eruption in Iceland caused widespread disruption across Europe, including the closure of UK airspace, amid concerns about the damage volcanic ash could cause to engine aircraft.

The Grimsvotn volcano in Vatnajokull National Park began erupting on Saturday and closed Iceland's airspace for a period.

Experts say the eruption is on a different scale to the one last year and is producing larger ash particles, which fall to the ground more quickly.

Icelandic government adviser Professor Magnus Tumi Gudmundsson said the eruption from the volcano was slowing down "day by day" and he believed the worst was over.