The dust now starts to settle...
Quick Links:
------------------------------------------
I awoke yesterday (Saturday) good and earlyÌýto provide online weatherÌýnowcasting for the 91Èȱ¬'s coverage of the Chinese Grand Prix qualifying.
On venturing (somewhat bleary-eyed)Ìýoutside later about 9am - and greeted byÌýthe expected blue, cloudless skies -ÌýI was astonished at the state of my car. A right mess. And so was every other one parked nearby. Take a look at the photos I snapped below:
A very conspicuous film of sandy-grey dust covered every inch of my vehicle; the coating streaked effectively clear here-and-there, as if cleansed by dribbles of water poured from a watering can.Ìý
RoamingÌýfurther afield to some local shopsÌýaÌýshort whileÌýlater, it was evident how the phenomenon had beenÌýrepeatedÌýon every car parked outdoors overnight,Ìýacross a swathe of .
But no rain had fallen overnight. And no prevailing southerly flow existed aloft, so noÌýchance ofÌýSaharan sand deposition -Ìýas often happens here into the warmer months.Ìý
You've doubtless now guessed the source: yup, it's that volcanic ash, now making it's presence felt down here at ground level across southern England.
The finer dust has progressively fallenÌýlower through the atmosphere. Overnight, it settled - albeit very finely -Ìýonto cars and other surfaces. The uniform coating was subsequently disruptedÌýand streaked by the formation of dew before dawn; this later evaporated away after sunrise to cause a myriad of spots and drip-like streaksÌýacross car bonnets and windscreens.
AÌýspectacular sunset over Westbury, Wiltshire, where a veil of volcanic ash hungÌýaloft at around 6000ft by Friday evening (Photo:Dwayne Alexander)Ìý
The current and forecast extent of the ash cloud - and the altitudes affected for aviation - can be viewed through .
So, have you experienced the same where you live? It's been already. We're feeding reliable reports of the dust depositionÌýback to the Met Office, so do share your observations here on the blog...
Comment number 1.
At 19th Apr 2010, Steve Belshaw wrote:Over the past 2 or 3 days I ahve noticed a marked increase in dust laying on my car. To prove the point I removed all of the dust on Saturday by washing the car and yesterday morning there was a noticable layer which has collected overnight.
Complain about this comment (Comment number 1)
Comment number 2.
At 19th Apr 2010, ro36 wrote:I have also noted the same patterns of dust on my car left out overnight, since Friday. I live in the Yeovilton area.
Complain about this comment (Comment number 2)
Comment number 3.
At 19th Apr 2010, blonder wrote:It is here in Sawston, Cambridgeshire, dust settled overnight on Friday. It looked similar to the photos shown below (but with a slight yellow hue to it) and was on other cars. I washed the car last night to see if more settles, if it does I shall take some samples to work and have a look under the microscope.
Also, a banana went very black in our fruit bowl over the same night, increased oxidation effects by the sulphur in the air...or coincidence...
Complain about this comment (Comment number 3)
Comment number 4.
At 19th Apr 2010, tony book wrote:I have the same type of dust on my car in Hove Sussex.
i would like to know what is the difference between this dust and sand. Planes routinely fly through sand (looks like smog/fog on approach) into Gulf States and that seems 'save'. Another point....these tweo hour flight tests by BA and KLM are a bit useless and prove nothing...empty aircraft with engines not spooled up. There should by a 1000 hours of test flying through the layers of dust, and engine examinations every 250 hours. This could be done by ten aircarft over the nexct week or so. if all is well then open the skies.??
Complain about this comment (Comment number 4)
Comment number 5.
At 19th Apr 2010, Marcusbailius wrote:Saturday morning, my car parked outside on the drive outside our house in Didcot, Oxfordshire, was covered much as shown in the photographs above. It's dark grey in colour when a finger is used to wipe some of it off.
We had a second, much smaller, deposition of the dust before Sunday morning.
Complain about this comment (Comment number 5)
Comment number 6.
At 19th Apr 2010, Adrian JONES wrote:Watch out when you wash it off! Friday afternoon and Saturday morning, simi;ar ash on our parked cars in Oxshott Surrey, wiped some off and it was dark grey. Kept some on a sheet of white paper, and you can see glass particles shining in the sun (especially with a x10 handlens). Sunday more ash but changed colour to whiter or much paler grey.
Has anyone else experienced difficulty washing it off?? Check your paintwork afterwards, myriads of fine scratches, used loads of water, and a soaked sponge, very gingerly, but seems to damage paintwork very readily, I hope this polishes out later, but it certainly seems to be extremely abrasive material.
Complain about this comment (Comment number 6)
Comment number 7.
At 19th Apr 2010, U14419455 wrote:I'm presently typing while looking out my window at a distinctly grey (formerly white) Ford Escort in Medway. We've had that sort of dust on things around here for a couple of days now.
Complain about this comment (Comment number 7)
Comment number 8.
At 19th Apr 2010, pie-thagoras wrote:Until about Thursday or Friday, I had a nice looking dark blue Honda that now has an ash-brown coloured effect that appeared overnight. It will be getting a very careful and gentle rinse.
Complain about this comment (Comment number 8)
Comment number 9.
At 19th Apr 2010, U14419455 wrote:6. At 10:42am on 19 Apr 2010, Adrian JONES wrote:
Has anyone else experienced difficulty washing it off?? Check your paintwork afterwards, myriads of fine scratches, used loads of water, and a soaked sponge, very gingerly, but seems to damage paintwork very readily, I hope this polishes out later, but it certainly seems to be extremely abrasive material.
---------------------------------------
I've been out with a garden hose on a low pressure setting. It washes off quite easily without trashing the paint work. (not that it matters on my old banger)
Complain about this comment (Comment number 9)
Comment number 10.
At 19th Apr 2010, Imipak wrote:I had a slightly lighter coating of the dust on Sunday morning, and even lighter (barely visible) this morning, Monday 19th. West Gloucestershire, GL17 postcode.
WRT washing it off cars without scouring paintwork, try:
Complain about this comment (Comment number 10)
Comment number 11.
At 19th Apr 2010, Jennie wrote:Here in Cardiff I've been noticing dusty deposits on my car since about Friday. I finally got myself sorted out to wash the car today, along with a couple of neighbours who were washing theirs, and it was really hard to wash off. It took repeated washings and rinsings, and I'm not entirely sure I got it all then. However, it'll probably need doing again tomorrow, so I decided to try not to worry about it too much!
Complain about this comment (Comment number 11)
Comment number 12.
At 19th Apr 2010, U14419455 wrote:And I can now unhappily report that three hours after washing the car it's got the same grey/red hue to it as it had this morning.
Waste of time that was eh?
Complain about this comment (Comment number 12)
Comment number 13.
At 19th Apr 2010, Gary Blick wrote:Just to confirm we had small deposits noticiable on roof of car at about 10pm Last night aprox 1mm. It was also possible to see particles in air illuminated by a 500w Flood light.This was in Kidderminster Worcestershire at the following location 52" 21' 53.32 N, 2" 16' 25.68 W at an elevation of 73m
Complain about this comment (Comment number 13)
Comment number 14.
At 19th Apr 2010, Breakfastnikov wrote:Dust on Saturday morning, maybe before, in the Haslemere area of South-West Surrey. Possibly more has fallen since, but I'm not that dedicated to washing my car so it's a little hard to judge.
Complain about this comment (Comment number 14)
Comment number 15.
At 20th Apr 2010, Porter Anderson wrote:Ian, can you tell us if rain could help with the aviation problem? We're getting rain today in Denmark, the first in quite a while. Can rain over European airspace wash some of the ash out and help clear things up? Thanks.
Complain about this comment (Comment number 15)
Comment number 16.
At 20th Apr 2010, Siddington Sid wrote:Tony Book asked about the difference between the ash and Gulf sand. I don't know about sand, but the ash contains glass, which melts in the jet engine, and then cools on to the turbine fan blades. This upsets the engine which then shuts down. Cooling the engine can result in the glass deposits breaking off, and then the engine can be restarted. This is what happened to a BA 747 in 1982 over Indonesia.
There was a good demo of the effect on Monday night's Bang Goes the Theory in 91Èȱ¬1.
Complain about this comment (Comment number 16)
Comment number 17.
At 20th Apr 2010, Ian Fergusson 91Èȱ¬ Weather wrote:Two comments on two posts...
Firstly, Hi Porter Anderson! Yes, any rainfall is a major factor in helping to reduce the levels of ash (obviously mostly at lower levels, albeit fronts / instability aloft / other associated dynamics all help 'mix' the otherwise stratified layers through a range of altitudes, for better or worse). The volcanic dust, in aerosol form, tends to act as effective hygroscopic (water attracting) or condensation nuclei, thereafter resulting in precipitation and washing a good deal of the stuff groundwards.
Siddington Sid, Hi also to you! Your summary of the threat to aviation is spot-on (i.e., the different degree of threat from volcanic ash versus airborne North African - or other regional - sand).
The additional issue is the sheer abrasiveness of the ash to aircraft in flight, as exemplified by the virtually opaque / sand-blasted windshield of Speedbird 9, the 1982 BA 747 flight you cite, by the time it landed (plus similar trashing of it's landing light lenses and other leading edge components). Note too the repeated reader comments below this blog entry, re the abrasiveness (in even low amounts) to vehicle paintwork.
In my previous blog, you'll also note a reply comment about how local glider pilots here in the West flew through the ash layer and discovered a conspicuous build-up of the material on their aircraft. Yes, the risk is a very real one - but it's the exact degree of risk that now forms the core of the ongoing plea being articulated by various airlines to re-open wider swathes of airspace, as you'll doubtless be reading on 91Èȱ¬ News online.
Best, Ian
Complain about this comment (Comment number 17)
Comment number 18.
At 21st Apr 2010, Steve - Iver wrote:Hi Ian, I live in Bucks, close to Heathrow, where it's been so quiet and eerie of late, and can confirm that I too, along with the rest of the population, have had ash deposits on my car since the weekend.
....and the sky is so blue today, you wouldn't think there was a problem in the world...
I also work in the aviation industry, and I'm proud of the way the industry has reacted to this. It has been such an unprecedented event, with regard to aviation, that no-one had any reference to work from, hence why this blanket-ban came into effect. We have some earlier isolated incidents to compare against, BA009 in 1982 for instance, and the KLM a few years later, but both of those were singularly different to this. The composition of the plume, as well as it's achieved altitude and how it was affected by weather are very different to other incidents.
I'm no fan of the current government, BUT, I'm pretty disappointed in those that seek to 'blame' the PM for this - what electorial bull. They are the same people who would be shouting for his resignation if one, just one, engine had failed and caused a plane to conduct an emergency landing, let alone anything worse.
Those that don't understand the logistical, planning and administrative challenges to operating an airline could do better by listening to those of us that do. We're not out of the woods yet!
Complain about this comment (Comment number 18)
Comment number 19.
At 23rd Apr 2010, Carol wrote:We went for a meal in West Harptree last night (22/04/2010) and came out about 9p.m. and there was alayer of dust on all the cars. Could this have been volcanic ash?
Complain about this comment (Comment number 19)
Comment number 20.
At 26th May 2010, pam wrote:I WOKE THIS MORNING AND MY WOODEN TABLE IN MY GARDEN WAS COVERED IN THICK ASH ALSO MY CHAIRS ANDPLANTS MY WINDOWS ALSO NEEDED A CLEAN THIS WAS IN DUNBAR ON THE EAST COAST SCOTLAND
Complain about this comment (Comment number 20)