Sentence examples for ash concentration from inspiring English sources

She added that people should refer to the announcements of local health organizations because the ash concentration may vary among countries.

"Over 1,000 flights took off from France last week in similar conditions to that which exist in Manchester today without encountering any problems or showing any levels of ash concentration.

This means that aircraft are now allowed to fly in areas containing low particle concentrations, and various efforts such as a collaboration of 26 European institutes called "Futurevolc", mean that models of ash concentration have been much improved since 2010.

The new flight regime effectively allows for three zones of international air space: ash-free, places where the ash concentration is regarded as safe, and places where it is unsafe.

Engine manufacturers, working with airlines and aircraft manufacturers, must ensure we have the best information on the effect of ash on engines, potentially increasing the threshold of ash concentration that engines can tolerate.

Such information can be used to work out ash concentration and thus determine the risk to aircraft engines.

All European airports were open this morning after ash concentrations over the continent dispersed, but ash may head back towards Portugal and Spain this afternoon, causing more problems.

"Ireland falls within the predicted area of ash concentrations that exceed acceptable engine manufacturer tolerance levels," the IAA said in a statement yesterday.

How? He'll "head a peer-review group that will analyse sources of data on ash concentrations", according to the BBC.

The CAA said that ash concentrations over Northern Ireland and parts of Scotland had exceeded new safety guidelines hastily drawn up last month when a prolonged eruption grounded UK flights for six days.

This system, which is made up of a network of nine Volcanic Ash Advisory Centres (VAACs) managed by the International Civil Aviation Organization, helps aviation officials divert air traffic around areas of dangerous ash concentrations.