Mass flux decay timescales of volcanic particles due to aeolian processes in the Argentinian Patagonia steppe.

ABSTRACT: We investigate the timescales of the horizontal mass flux decay of wind remobilised volcanic particles in Argentina, associated with the tephra-fallout deposit produced by the 2011-2012 Cordón Caulle (Chile) eruption. Particle removal processes are controlled by complex interactions of meteorological conditions, surface properties and particle depletion with time. We find that ash remobilisation follows a two-phase exponential decay with specific timescales for the initial input of fresh ash (1-74 days) and the following soil stabilisation processes (3-52 months). The characteristic timescales as a function of particle size shows two minimum values, identified for sizes around 2 and 19-37 [Formula: see text]m, suggesting that these size-range particles are remobilised more easily, due to t

SUBMITTER: Dominguez L 

PROVIDER: S-EPMC7468302 | biostudies-literature | 2020 Sep

REPOSITORIES: biostudies-literature