2011-06-05

Particulate Matter in the air over the Eastern fjords on 4 June 2011

In the news yesterday, 4 June 2011, there were reports about an ash storm in the eastern fjords (see short text, in Icelandic, below):

Öskumistur á Austfjörðum

Þétt öskumistur liggur nú yfir Fáskrúðsfirði
Mynd: Óðinn Magnason

Þétt öskumistur liggur nú yfir Fáskrúðsfirði Mynd: Óðinn Magnason

Vestlæg átt er nú ríkjandi á austfjörðum og leggur því öskumistur yfir. Að sögn Óðins Magnasonar á Fáskrúðsfirði er bærinn hulinn talsvert þykku mistri og snjórinn í fjöllunum orðinn gráleitur. Þá segir Óðinn augljóst af bragðinu á loftinu að ekki sé um að ræða venjulegt ryk eða moldrok, heldur ösku frá Grímsvatnagosinu, enda sé bíllinn hans hulinn svörtu öskuryki.

http://www.ruv.is/frett/oskumistur-a-austfjordum

No doubt that re-suspended ash probably was responsible, at least partly. But, from satellite images, it is clear that a well know dust storm source area is also involved. That area is north of Vatnajökull, north of Dyngjujökull, a large sandur area.

The images below are taken at 12:30, 14:05 and 14:20 and are all MODIS images, from NASA/Rapidfire.

20110604_crefl1_1230_250m
12:30

20110604_1405_modis_A20111551405
14:05

20110604_1420_modis_P20111551420 
14:20

The source areas can be others and more spread out, but clearly the sandur north of Vatnajökull is at least partly to blame. Of course it could well be covered with ash after the Grímsvötn eruption.

2011-05-25

Eruption very much reduced, end near, but lot of ash to deal with

It seems that the eruption in Grímsvötn is quickly winding down.

Plenty of ash to deal with though !

Couple of satellite images, from NASA MODIS sensors, from 23 and 24 May 2011.

20110523_1205_modis_A20111431205_crop

23 May 2011. A lot of ash, probably mostly windblown but hard to tell exactly.

20110524_1440_modis_P20111441440_crop

24 May 2011. A little better, in terms of actually seeing down to the land surface, and less material being emitted and/or blown.

2011-05-22

Ash from Grímsvötn eruption reaches Reykjavik

Measurements in the great Reykjavik area, at Hvaleyrarholti and Digranesheiði, show clearly that as from the eruption in Grímsvötn has reached Reykjavik. Around 20:30 on 22 May 2011.

PM10_HEH_HHKDigranes_22May2011 

Latest measurements indicate that this was about the top values, this time around, with concentration much lower now at 22:00, and high value of 194 micro-g/m3 at HEH.

Of course we can expect other peaks like this, even later tonight.

Even more sat-photos from the eruption today, 22 May 2011

20110522_crefl1_1300_crop

At 13:00 today, 22 May 2011 (NASA MODIS/Rapidfire).

More satellite images from the Grímsvötn eruption

201105221126_EV_250_RefSB_b

Today at 11:26; 22 May 2011  (MODIS/NASA/RAPIDFIRE – EV).

201105221304_rgb_crop

Today at 13:04 (MODIS/NASA/Rapidfire).