A GRAVITY CURRENT MODEL FOR THE MAY 18, 1980 MOUNT-ST-HELENS PLUME

被引：60

作者：

BURSIK, MI

CAREY, SN

SPARKS, RSJ

机构：

[1] UNIV BRISTOL,DEPT GEOL,BRISTOL BS8 1RJ,ENGLAND

[2] UNIV RHODE ISL,GRAD SCH OCEANOG,KINGSTON,RI 02881

[3] JET PROP LAB,PASADENA,CA 91109

来源：

GEOPHYSICAL RESEARCH LETTERS | 1992年 / 19卷 / 16期

关键词：

D O I：

10.1029/92GL01639

中图分类号：

P [天文学、地球科学];

学科分类号：

07 [理学];

摘要：

Observations of the stratospheric plume from the May 18, 1980, Mount St. Helens eruption suggest that it spread in the crosswind direction as an intrusive gravity current, as it was transported downwind. Grain size analyses of the plinian tephra are consistent with this model, suggesting that to distances of many hundreds of kilometers, turbulent atmospheric diffusion played a secondary role in plume spreading and tephra dispersal.

引用

页码：1663 / 1666

页数：4

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[2]

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[3]

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