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Physics and Astrophysics Research Seminar Series

Salt polygons and groundwater convection

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Seminars

As part of the School of Science and Technology's Physics and Astrophysics Research Seminar Series, Lucas Goehring, NTU presents: Salt polygons and groundwater convection.

  • From: Wednesday 4 March 2020, 1 pm
  • To: Wednesday 4 March 2020, 2 pm
  • Location: 015, CELS, Nottingham Trent University, Clifton Campus, Clifton Lane, Nottingham, NG11 8NS
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Event details

As part of the School of Science and Technology's Physics and Astrophysics Research Seminar Series, Lucas Goehring, NTU presents: Salt polygons and groundwater convection.

Abstract

From fairy circles to patterned ground and columnar joints, natural patterns spontaneously appear in many complex geophysical settings. Here, we explain the origins of polygonally patterned crusts of salt playa and salt pans. These beautifully regular features, approximately a meter in diameter, are found worldwide and are fundamentally important to the transport of salt and dust in arid regions, yet there has been no convincing mechanism known for their formation. We show that they are the surface expression of buoyancy-driven convection in the porous soil beneath a salt crust. By combining consistent results from direct field observations, analogue experiments, linear stability theory, and numerical simulations, we further determine the conditions under which salt polygons will form, as well as how their characteristic size emerges.

This seminar is hosted by Ian Shuttleworth

All Welcome

For any enquires please contact Ian Shuttleworth

Location details

Room/Building:

015, CELS

Address:

Nottingham Trent University
Clifton Campus
Clifton Lane
Nottingham
NG11 8NS

Past event

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