dc.contributor.author | Johnson, Ben | |
dc.contributor.author | Turnbull, Kate | |
dc.contributor.author | Brown, Phil | |
dc.contributor.author | Burgess, Rachel | |
dc.contributor.author | Dorsey, James | |
dc.contributor.author | Baran, Anthony J. | |
dc.contributor.author | Webster, Helen | |
dc.contributor.author | Haywood, Jim | |
dc.contributor.author | Cotton, Richard | |
dc.contributor.author | Ulanowski, Zbigniew | |
dc.contributor.author | Hesse, Evelyn | |
dc.contributor.author | Wolley, Alan | |
dc.contributor.author | Rosenberg, Philip | |
dc.date.accessioned | 2012-08-20T14:00:45Z | |
dc.date.available | 2012-08-20T14:00:45Z | |
dc.date.issued | 2012 | |
dc.identifier.citation | Johnson , B , Turnbull , K , Brown , P , Burgess , R , Dorsey , J , Baran , A J , Webster , H , Haywood , J , Cotton , R , Ulanowski , Z , Hesse , E , Wolley , A & Rosenberg , P 2012 , ' In-situ observations of volcanic ash clouds from the FAAM aircraft during the eruption of Eyjafjallajökull in 2010 ' , Journal of Geophysical Research: Atmospheres , vol. 117 , D00U24 . https://doi.org/10.1029/2011JD016760 | |
dc.identifier.issn | 2169-897X | |
dc.identifier.other | ORCID: /0000-0003-4761-6980/work/32374629 | |
dc.identifier.other | ORCID: /0000-0002-2721-7600/work/62749823 | |
dc.identifier.uri | http://hdl.handle.net/2299/8906 | |
dc.description.abstract | During April–May 2010 the UK Facility for Airborne Atmospheric Measurements (FAAM) BAe-146 aircraft flew 12 flights targeting volcanic ash clouds around the UK. The aircraft observed ash layers between altitudes of 2–8 km with peak mass concentrations typically between 200–2000 μg/m3, as estimated from a Cloud and Aerosol Spectrometer (CAS). A peak value of 2000–5000 μg/m3 was observed over Scotland on 14 May 2010, although with considerable uncertainty due to the possible contamination by ice. Aerosol size distributions within ash clouds showed a fine mode (0.1–0.6 μm) associated with sulphuric acid and/or sulphate, and a coarse mode (0.6–35 μm) associated with ash. The ash mass was dominated by particles in the size range 1–10 μm (volume-equivalent diameter), with a peak typically around 3–5 μm. Electron-microscope images and scattering patterns from the SID-2H (Small Ice Detector) probe showed the highly irregular shape of the ash particles. Ash clouds were also accompanied by elevated levels of SO2 (10–100 ppbv), strong aerosol scattering (50–500 × 10−6 m−1), and low Ångstrom exponents (−0.5 to 0.4) from the 3-wavelength nephelometer. Coarse-mode mass specific aerosol extinction coefficients (kext), based on the CAS size distribution varied from 0.45–1.06 m2/g. A representative value of 0.6 m2/g is suggested for distal ash clouds (∼1000 km downwind) from this eruption. | en |
dc.format.extent | 26 | |
dc.format.extent | 1841406 | |
dc.language.iso | eng | |
dc.relation.ispartof | Journal of Geophysical Research: Atmospheres | |
dc.subject | Aerosol, aircraft, ash, in situ, observation, volcanic | |
dc.title | In-situ observations of volcanic ash clouds from the FAAM aircraft during the eruption of Eyjafjallajökull in 2010 | en |
dc.contributor.institution | School of Physics, Astronomy and Mathematics | |
dc.contributor.institution | Science & Technology Research Institute | |
dc.contributor.institution | Centre for Atmospheric and Climate Physics Research | |
dc.contributor.institution | Light Scattering and Radiative Processes | |
dc.description.status | Peer reviewed | |
dc.date.embargoedUntil | 2012-10-26 | |
rioxxterms.versionofrecord | 10.1029/2011JD016760 | |
rioxxterms.type | Journal Article/Review | |
herts.preservation.rarelyaccessed | true | |