The impact of the atmosphere on the Eyjafjallajökull 2010 eruption plume

[1] The eruption of Eyjafjallajokull volcano in 2010 lasted 39 days, 14 April–23 May. The eruption had two explosive phases separated by a phase with lava formation and reduced explosive activity. During the explosive phases there were episodes of strong winds that advected ash to the south and southeast leading to widespread disruptions in air traffic. The height of the eruption plume was monitored with a weather radar and with web cameras mounted with a view of the volcano. Three different types of the impact of the ambient atmosphere on the eruption plume are described. First, the weather situation throughout the eruption has been analyzed. The frequency of northerly wind component is found to be unusually high, or 71% in comparison to 49% on average in spring. Secondly, during the effusive phase of the eruption diurnal variation was observed in the plume altitude and there is evidence that suggest that nocturnal inversions may have played a role, limiting the rise of the weak plume. Thirdly, images from a web camera were analyzed and the rise of individual cloud heads associated with explosions at the volcano vent mapped. The velocity profiles obtained largely agree with conceptual models of volcanic plumes.

[1]  Larry G. Mastin,et al.  A user‐friendly one‐dimensional model for wet volcanic plumes , 2007 .

[2]  Lionel Wilson,et al.  The Control of Volcanic Column Heights by Eruption Energetics and Dynamics , 1978 .

[3]  Franco Marenco,et al.  A study of the arrival over the United Kingdom in April 2010 of the Eyjafjallajökull ash cloud using ground-based lidar and numerical simulations , 2012 .

[4]  Geoffrey Ingram Taylor,et al.  Turbulent gravitational convection from maintained and instantaneous sources , 1956, Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences.

[5]  Alfred J Prata,et al.  Satellite detection of hazardous volcanic clouds and the risk to global air traffic , 2009 .

[6]  Marcus I. Bursik,et al.  Effect of wind on the rise height of volcanic plumes , 2001 .

[7]  A. Stohl,et al.  Validation of the lagrangian particle dispersion model FLEXPART against large-scale tracer experiment data , 1998 .

[8]  W. Collins,et al.  The NCEP–NCAR 50-Year Reanalysis: Monthly Means CD-ROM and Documentation , 2001 .

[9]  P. Welander,et al.  Studies on the General Development of Motion in a Two‐Dimensional, Ideal Fluid , 1955 .

[10]  Stefan Emeis,et al.  Measurement and simulation of the 16/17 April 2010 Eyjafjallajökull volcanic ash layer dispersion in the northern Alpine region , 2011 .

[11]  Andrew W. Woods,et al.  The fluid dynamics and thermodynamics of eruption columns , 1988 .

[12]  M. Herzog,et al.  Tall clouds from small eruptions: the sensitivity of eruption height and fine ash content to tropospheric instability , 2009 .

[13]  U. Schumann,et al.  Airborne observations of the Eyjafjalla volcano ash cloud over Europe during air space closure in April and May 2010 , 2010 .

[14]  S. Thorarinsson,et al.  The Hekla Eruption of 1970 , 1972 .

[15]  Lionel Wilson,et al.  Explosive Volcanic Eruptions–III. Plinian Eruption Columns , 1958 .

[16]  Andrew Tupper,et al.  Aviation hazards from volcanoes: the state of the science , 2009 .

[17]  L. Burgin,et al.  Charge mechanism of volcanic lightning revealed during the 2010 eruption of Eyjafjallajökull , 2011 .

[18]  L. Wilson,et al.  Explosive volcanic eruptions - VI. Ejecta dispersal in plinian eruptions: the control of eruption conditions and atmospheric properties , 1987 .

[19]  Lionel Wilson,et al.  Explosive volcanic eruptions — V. Observations of plume dynamics during the 1979 Soufrière eruption, St Vincent , 1982 .

[20]  Mark Settle,et al.  Volcanic eruption clouds and the thermal power output of explosive eruptions , 1978 .

[21]  Michael Herzog,et al.  Effect of environmental conditions on volcanic plume rise , 1999 .

[22]  S. Gíslason,et al.  The 1991 eruption of Hekla, Iceland , 1992 .

[23]  A. Robock,et al.  Climatic response to high‐latitude volcanic eruptions , 2005 .

[24]  F. Bonnardot,et al.  Comparison of VAAC atmospheric dispersion models using the 1 November 2004 Grimsvötn eruption , 2007 .

[25]  G. Carazzo,et al.  On the rise of turbulent plumes : Quantitative effects of variable entrainment for submarine hydrothermal vents, terrestrial and extra terrestrial explosive volcanism , 2008 .

[26]  M. Hort,et al.  Volcanic ash hazard climatology for an eruption of Hekla Volcano, Iceland , 2011 .

[27]  Pordur Arason,et al.  Observations of the altitude of the volcanic plume during the eruption of Eyjafjallajökull, April-May 2010 , 2011 .

[28]  Freysteinn Sigmundsson,et al.  Ice–volcano interaction of the 1996 Gjálp subglacial eruption, Vatnajökull, Iceland , 1997, Nature.

[29]  A. Robock.  Volcanic eruptions and climate , 2000 .

[30]  William I. Rose,et al.  Weather radar observations of the Hekla 2000 eruption cloud, Iceland , 2004 .

[31]  R. Reynolds,et al.  The NCEP/NCAR 40-Year Reanalysis Project , 1996, Renewable Energy.

[32]  D. Rosenfeld,et al.  Satellite and radar analysis of the volcanic‐cumulonimbi at Mount Pinatubo, Philippines, 1991 , 2005 .

[33]  Guðrún Nína Petersen,et al.  A short meteorological overview of the Eyjafjallajökull eruption 14 April–23 May 2010 , 2010 .

[34]  Albert Ansmann,et al.  Evaluating the structure and magnitude of the ash plume during the initial phase of the 2010 Eyjafjallajökull eruption using lidar observations and NAME simulations , 2011 .

[35]  S. Baloga,et al.  Sensitivity of buoyant plume heights to ambient atmospheric conditions: Implications for volcanic eruption columns , 1996 .

[36]  T. Jónsson,et al.  Forecasting and monitoring a subglacial eruption in Iceland , 2005 .

[37]  R. S. J. Sparks,et al.  The dimensions and dynamics of volcanic eruption columns , 1986 .

[38]  P. Einarsson,et al.  The Hekla eruption 1980–1981 , 1983 .