Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/10283
AuthorsFolch, A.* 
Costa, A.* 
Macedonio, G.* 
TitleFPLUME-1.0: An integrated volcanic plume model accounting for ash aggregation
Issue Date2016
Series/Report no./9 (2016)
DOI10.5194/gmd-9-431-2016
URIhttp://hdl.handle.net/2122/10283
Keywordseruption column
volcanic modeling
Subject Classification05. General::05.01. Computational geophysics::05.01.99. General or miscellaneous 
AbstractEruption source parameters (ESP) characterizing volcanic eruption plumes are crucial inputs for atmospheric tephra dispersal models, used for hazard assessment and risk mitigation.We present FPLUME-1.0, a steady-state 1-D (one-dimensional) cross-section-averaged eruption column model based on the buoyant plume theory (BPT). The model accounts for plume bending by wind, entrainment of ambient moisture, effects of water phase changes, particle fallout and re-entrainment, a new parameterization for the air entrainment coefficients and a model for wet aggregation of ash particles in the presence of liquid water or ice. In the occurrence of wet aggregation, the model predicts an effective grain size distribution depleted in fines with respect to that erupted at the vent. Given a wind profile, the model can be used to determine the column height from the eruption mass flow rate or vice versa. The ultimate goal is to improve ash cloud dispersal forecasts by better constraining the ESP (column height, eruption rate and vertical distribution of mass) and the effective particle grain size distribution resulting from eventual wet aggregation within the plume. As test cases we apply the model to the eruptive phase-B of the 4 April 1982 El Chichón volcano eruption (México) and the 6 May 2010 Eyjafjallajökull eruption phase (Iceland). The modular structure of the code facilitates the implementation in the future code versions of more quantitative ash aggregation parameterization as further observations and experiment data will be available for better constraining ash aggregation processes.
Appears in Collections:Papers Published / Papers in press

Files in This Item:
File Description SizeFormat 
folcos2016.pdfarticle796.25 kBAdobe PDFView/Open
Show full item record

Page view(s)

120
Last Week
0
Last month
0
checked on Jul 21, 2017

Download(s)

46
checked on Jul 21, 2017

Google ScholarTM

Check

Altmetric