Meteorological Controls on Local and Regional Volcanic Ash Dispersal.
Meteorological Controls on Local and Regional Volcanic Ash Dispersal.
复制标题
DOI:
10.1038/s41598-018-24651-1
复制
发表时间:
2018-05-02
影响因子:
4.6
通讯作者:
Pyle DM
中科院分区:
文献类型:
--
作者:
Poulidis AP;Phillips JC;Renfrew IA;Barclay J;Hogg A;Jenkins SF;Robertson R;Pyle DM
Volcanic ash has the capacity to impact human health, livestock, crops and infrastructure, including international air traffic. For recent major eruptions, information on the volcanic ash plume has been combined with relatively coarse-resolution meteorological model output to provide simulations of regional ash dispersal, with reasonable success on the scale of hundreds of kilometres. However, to predict and mitigate these impacts locally, significant improvements in modelling capability are required. Here, we present results from a dynamic meteorological-ash-dispersion model configured with sufficient resolution to represent local topographic and convectively-forced flows. We focus on an archetypal volcanic setting, Soufrière, St Vincent, and use the exceptional historical records of the 1902 and 1979 eruptions to challenge our simulations. We find that the evolution and characteristics of ash deposition on St Vincent and nearby islands can be accurately simulated when the wind shear associated with the trade wind inversion and topographically-forced flows are represented. The wind shear plays a primary role and topographic flows a secondary role on ash distribution on local to regional scales. We propose a new explanation for the downwind ash deposition maxima, commonly observed in volcanic eruptions, as resulting from the detailed forcing of mesoscale meteorology on the ash plume.
登录
查看更多内容
影响因子:
4.9
作者:
Dunion, Jason P.
通讯作者:
Dunion, Jason P.
影响因子:
2.7
作者:
Burton, R. R.;Dudhia, J.;Mobbs, S. D.
通讯作者:
Mobbs, S. D.
影响因子:
3.9
作者:
Eychenne, Julia;Rust, Alison C.;Wobrock, Wolfram
通讯作者:
Wobrock, Wolfram
影响因子:
3.9
作者:
Klawonn, M.;Frazer, L. N.;Rosenberg, M. D.
通讯作者:
Rosenberg, M. D.
影响因子:
5.8
作者:
Manzella, Irene;Bonadonna, Costanza;Monnard, Helene
通讯作者:
Monnard, Helene