TY - CONF A1 - Arnason, Gylfi A1 - Eliasson, Jonas A1 - Weber, Konradin A1 - Böhlke, Christoph A1 - Palsson, Thorgeir A1 - Rögnvaldsson, Ólafur A1 - Thorsteinsson, Throstur A1 - Platt, Ulrich A1 - Tirpitz, Lukas A1 - Jones, Roderic L. A1 - Smith, Paul D. T1 - Results of airborne measurements in the plume near and far from the 2014 Bardarbunga-Holuhraun eruption T2 - Geophysical Research Abstracts: EGU General Assembly 2015 N2 - The Volcanic Ash Research (VAR) group is focused on airborne measurement of ash contamination to support safe air travel. In relations to the recent eruption, the group measured ash and several gaseous species in the plume 10-300 km from the volcano. The eruption emitted ash turned out to be mostly in the fine aerosol range (much less than 10 micrometers in diameter). Our highest measured concentrations were lower than 1 mg/m3 indicating that commercial air traffic was not threatened (greater than 2 mg/m3) by the ash contamination. But we measured sulfur dioxide (SO2 ) up to 90 mg/m3, which presented a potentially dangerous pollution problem. However, airborne measurements indicate that the sulfur concentration decays (probably due to scavenging) as the plume is carried by the wind from the volcano, which limits the area of immediate danger to the public. Here we present size distribution for particulate matter collected during flights, near and far from the crater at various times. The particle data is then compared with simultaneously collected sulfur dioxide data and the rate of decay of is estimated. Sulfur and particle concentration variations with height in the far plume are presented. Some airborne measurements for H2S, NO, NO2 and CO2 will also be presented. This includes correlation matrices for simultaneous measurements of these gases and comparison to National Air Quality Standards and background values. KW - Luftreinhaltung KW - Vulkanasche KW - Vulkanismus KW - Atmosphärisches Aerosol KW - Messtechnik Y1 - 2015 UR - https://opus4.kobv.de/opus4-hs-duesseldorf/frontdoor/index/index/docId/5091 N1 - Vortragsabstract VL - 17 PB - Copernicus CY - Göttingen ER -