Latest satellite image of Grímsvötn Ash Cloud
Satellite Image of latest Ash Cloud
Grímsvötn
Meteosat Second Generation (MSG)
Image of Ash Cloud taken 06:00am on 24th May 2011
Image taken on 23rd of May
MSG images are monitoring for the presence of volcanic ash emission in the vicinity of Iceland using infrared data from the Meteosat Second Generation (MSG) satellite. Because cloud particles and volcanic ash particles interact with the infrared radiation in different ways, data at several different wavelengths can be combined to identify the main ash plume, which, when present, would be shown as yellow and orange colours in the images. However, it should be noted that it is only the thicker parts of the plume that are able to be detected by this method. In addition, the ash plume is often masked by overlying high cloud and therefore might not appear in the satellite image.
New Ash Cloud Heads for Britain
Flights in Scotland have been cancelled by a regional airline as volcanic ash continues to head towards the UK.
Loganair, based at Glasgow airport, has cancelled 36 flights on Tuesday as the Civil Aviation Authority (CAA) warns that disruption cannot be ruled out.
Analysts expect the ash cloud from an Icelandic volcano to reach Scotland and Northern Ireland by Monday evening.
The event comes a year after ash from the Eyjafjallajokull volcano spread across Europe, causing huge disruption.
'Better prepared'
Andrew Haines, chief executive of the CAA, said: "Our number one priority is to ensure the safety of people both onboard aircraft and on the ground.
"We can't rule out disruption, but the new arrangements that have been put in place since last year's ash cloud mean the aviation sector is better prepared and will help to reduce any disruption in the event that volcanic ash affects UK airspace."
A Loganair spokesman said Met Office forecasts indicated that a high density of ash would be present in large parts of Scottish airspace throughout Tuesday, clearing into Wednesday morning.
It has cancelled almost all flights on Tuesday and advised customers due to travel to contact them to rearrange flights. Only inter-island routes in Orkney are unaffected.
The UK's air traffic control service, Nats, said volcanic ash was forecast to affect parts of Scotland between 1800 BST and midnight on Monday.
Services may be affected from Barra, Benbecula and Tiree.
The Met Office, which runs Europe's Volcanic Ash Advisory Centre, earlier said there was a possibility of ash moving across the UK towards the end of the week.
But a spokesman said the weather was much more changeable than at the time of last year's eruption and there was a lot more uncertainty.
The CAA said ash levels would be graded as low, medium or high, and airlines would be notified if levels reached medium or high.
Airlines would then consider whether to fly, according to risk assessments already carried out, the CAA added.
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