IUGG 2015. VW02 Best Practices and Recommendations for Tephra Measurements
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we would like to draw your attention on the one-day workshop "VW02 Best Practices and Recommendations for Tephra Measurements" to be held during the upcoming IUGG General Assembly in Prague on 2 July, 2015 from 8:30 to 18:00. The workshop will be divided into a general session including solicited talks and plenary discussions aimed at elaborating recommendations and procedures for the community. More detailed information is given below.
We look forward to see you in Praga!
Co-conveners: Arnau Folch (Barcelona, Spain), Costanza Bonadonna (Geneva, Switzerland), Simona Scollo (Catania, Italy), Bruce Houghton (Manoa, USA), Jeremy Phillips (Bristol, U.K.).
Description. In recent years many efforts have been made by groups of researchers and by the THM Commission to revise and define best practices and to make recommendations to the volcanological community studying of fallout tephra deposits. Two orders of problems related with this general issue can be evoked:
- defining accuracy and uncertainties related to basic measures like deposit thickness and bulk density, maximum clast dimensions and grain size, componentry and clast density of the erupted products;
- discussing pros and cons of the different methods, and the related uncertainties, used in the evaluation of fundamental parameters like erupted volume and mass, magma discharge rate, column height, total grain size distribution, extent of ash aggregation, etc.
Many of these types of data are presently available in the literature, but they often lack information related to the methods used in the measurements, or of the related uncertainties, and only few methodologies of data collection are now standardized. Although field volcanologists know very well the cost (both economic and in terms of dedicated time) of gathering these data, and, in some cases, also how many of them are not-replicable, these data are often only partially published, and generally presented only in graphical or in a much reduced form. In their complete form, these data can be of utmost importance in the progress of volcanological science, as they could be used for comparative studies, or as basic data for testing new physical models of eruptions. We propose to convene a group of experts in these problems who will review methods presently used or recently introduced in the volcanological literature, proposing best practices and recommendations to the volcanological community in order to increase data comparability and to define uncertainties related with the different estimates, as well as to discuss protocols for making available the whole datasets of interest. The proposed 1-day workshop will be divided into a general session with few focused solicited talks, dedicated to introduce and discuss the different methods, followed by a half-day session during which different working groups will elaborate some general procedures for collecting, presenting and publishing data to be circulated within the community.
Volcano Listserv is a collaborative venture among Arizona State University (ASU), Portland State University (PSU), the Global Volcanism Program (GVP) of the Smithsonian Institution's National Museum of Natural History, and the International Association for Volcanology and Chemistry of the Earth's Interior (IAVCEI).
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