Figure 9
From: UK monitoring and deposition of tephra from the May 2011 eruption of Grímsvötn, Iceland
PM 10 spikes across the UK. Circles are data from AURN and SAQD. Diamonds are from SEPA Osiris units, which were only operational for part of the study period. Locations where PM10 was >100 μ g m-3 have white outlines. Triangles mark locations where PM10 measurements were in the 95th percentile for the period 1 April–30 June. (a) Maximum hourly PM10 concentration across the UK from 23–24 May 2011. The highest value was recorded in Aberdeen, with a cluster of elevated values (>100 μ g m-3) in Central Scotland. (b) Maximum hourly PM10 concentration across the UK from 25–29 May 2011. There was a cluster of elevated values (> 100 μ g m-3) in Central Scotland.