Two experts in volcanic ash and aircraft engines will answer readers' questions about risks to flights from volcanic eruptions, starting at 2pm BST
Post your questions in the comments field
Iceland's Gr�msv�tn volcano has sent thousands of tonnes of ash into the sky in the past few days, raising concerns of a repeat of the travel chaos seen across northern Europe almost a year ago.
The ash arrived in the UK on Tuesday and many flights to and from Scottish airports were cancelled. Transport secretary Philip Hammond has said the worst is over but there is still caution in the air.
The Met Office forecast that a high-density ash cloud would begin to affect southern England by Friday. But meteorologists have said that the volatility of current weather patterns makes it difficult to predict the likely impact of the ash cloud over the next few days.
To answer your concerns about the potential impacts of ash clouds like this, two experts are standing by to answer your questions from 2pm BST on Wednesday.
John A Stevenson (@volcan01010) is a postdoctoral research fellow in the School of Geosciences at Edinburgh University, UK. His work explores the types of volcanic eruption and weather conditions that can result in ash from Icelandic volcanoes being deposited in Scotland and across northern Europe. Over the past few days he has been posting regular updates on the Gr�msv�tn eruption on his blog.
Colin Brown (@ColinBrownIMechE) is director of engineering at the Institution of Mechanical Engineers and, in his previous job, worked on aircraft engines at Rolls Royce. He has been tracking the progress of the ash cloud.
Post your questions for Drs Stevenson and Brown below.
Source: http://www.guardian.co.uk/science/2011/may/25/volcanic-ash-cloud
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