Software & Data

DATABASES

CatVolc: A new database of geochemical and geochronological data of volcanic-related materials from the Catalan Volcanic Zone (Spain)

The CatVolc (Catalan Volcanism) database compiles available geochemical and geochronological data of volcanic-related materials of the CVZ. For each sample, the CatVolc database lists general information about the sampling site, sample lithology, whole-rock analyses (including major and trace elements), isotopic ratios, mineral chemistry, and radiometric/thermoluminescence dating information, if available. A preliminary analysis of the information contained in the CatVolc database highlights the critical limitations of the current state of knowledge and allows suggesting potential future directions for volcanic-driven investigations in the CVZ. Additionally, the results obtained validate the CatVolc database as a key tool for comprehending the spatial and temporal evolution of the magmatic system(s) and volcanic activity in the CVZ, particularly in the Garrotxa Volcanic Field. This aspect is critical for advancing in the assessment of the volcanic hazards in the region and for gaining a comprehensive understanding of future volcanic activity.

The current database version consists of three MS Excel files dedicated to primary magmatic rocks (CatVolc_magmatic_rocks.xlsx), xenoliths (CatVolc_xenoliths.xlsx) and radiometric/thermoluminescence dating information (CatVolc_dating.xlsx). Each MS Excel file is structured around a main table (Samples_general_info) containing general information (e.g., location, age, sampling site) of the listed samples, and a certain number of secondary tables. Secondary tables included in the MS Excel files for magmatic rocks and xenoliths report: (i) whole-rock geochemistry (Major_elements and Trace_elements); (ii) isotopic relations data (Isotopic_relations); and (iii) mineral and volcanic glass chemistry (Amphibole, Feldspar, Felspathoid, Glass, Mica, Olivine, Pyroxene, Oxides, Serpentines and Sulphides). In addition to the Samples_general_info table, the CatVolc_dating.xlsx also includes radiometric/thermoluminescence dating information (Dating). Finally, in all three Excel files, we have incorporated a table with consulted references (References) and a glossary of the acronyms used for the parameters included in the main and secondary tables (Codes).

DecTephra (Deception Island Tephra Record) database

The DecTephra (Deception Island Tephra Record) database compiles the published information on all tephra layers potentially sourced in Deception Island. Geochemical analyses of the sampled layers are also provided, where available.

The DecTephra database has been constructed based on an extensive review of 30 peer-reviewed scientific articles and 2 PhD theses published between 1988 and 2020. For a tephra layer to be included in the DecTephra database, its Deception Island origin needs to be confirmed (or highly suspected) based on the geochemical similarity between the tephra layer and Deception Island’s erupted materials. The proximity of the observed tephra layer to Deception Island, or to another sampling site with tephra layers known to be sourced at Deception Island, are also considered potential evidence, particularly if no geochemical analyses are available. If this is the case, it is clearly indicated in the DecTephra record.

Cite: Hopfenblatt, Joaquin, Geyer, Adelina, Aulinas, Meritxell, Álvarez-Valero, Antonio M., Polo Sánchez, Antonio, Giralt, Santiago, & Smellie, John L. (2022). Database of Deception Island’s tephra record (DecTephra). In Journal of Volcanology and Geothermal Research (v.1.0, Vol. 425, p. 107516). Zenodo. https://doi.org/10.5281/zenodo.6077062

SOFTWARE

FALL3D

FALL3D is an open source community code for atmospheric transport of particles, aerosols and radionuclides particularly targeting volcanological applications. During the first phase of the ChEESE Center of Excellence (ChEEE-1P, 2018-2022), the pure MPI version of the code was heavily refactored and accelerated using OpenACC directives, and a dwarf version (mini-app) implemented to facilitate co-design and performance improvement activities.

FALL3D solves the so-called Advection-Diffusion-Sedimentation (ADS) equation on a generalised orthogonal system of coordinates. Coordinate mappings exist to map physical domains (e.g. accounting for Earth’s curvature and topography) to a «brick-like” computational domain by using coordinate-dependent horizontal and vertical mappings. The model can be solved on various horizontal (cartesian, spherical, Mercator, polar stereographic, etc.) and vertical (terrain following, etc.) coordinate systems. The finite volume based solver uses a high-resolution Kurganov-Tadmor (KT) scheme combined with an explicit solver time marching (4th order Runge-Kutta or first order Euler) and considering a simple structured mesh with 3D brick-like domain decomposition. FALL3D uses MPI for 3D domain decomposition with freedom for users to choose the number of processors along each spatial direction. The «brick-like» computational domain is discretised using a variation of the staggered Arakawa-D grid, in which the wind velocity components are evaluated at the respective cell faces and the rest of scalar quantities at the cell centres. This configuration is very convenient for solving the 3D equation in a fractional manner because, when solving each one-dimensional case, wind velocities are already aligned with the boundaries of the corresponding one dimensional cells. In the accelerated version (currently relying on OpenACC + CUDA-aware MPI) each subdomain is assigned to a single GPU.

GitLab repository: https://gitlab.com/fall3d-suite/fall3d

Documentation: https://fall3d-suite.gitlab.io/fall3d/

The main repository has obtained an EOSC-synergy software gold badge

Cite: Prata, A. T., Mingari, L., Folch, A., Macedonio, G., and Costa, A.: FALL3D-8.0: a computational model for atmospheric transport and deposition of particles, aerosols and radionuclides – Part 2: Model validation, Geosci. Model Dev., 14, 409–436, https://doi.org/10.5194/gmd-14-409-2021, 2021.