Seepage‐induced penetration of water vapor and dust beneath ripples and dunes
MY Louge, A Valance, H Mint Babah… - Journal of …, 2010 - Wiley Online Library
Journal of Geophysical Research: Earth Surface, 2010•Wiley Online Library
We present stratigraphic measurements of humidity and bulk density beneath the surface of
a barchan dune obtained with a capacitance probe. A model shows that air seeping through
the sand bed in response to spatial variations of static pressure along the ripple surface
guides water vapor through ripple crests and gradually stores dust beneath troughs. The
accumulated dust remains trapped beneath the relatively compact trough surface until wind
is violent enough to mobilize sand deeply.
a barchan dune obtained with a capacitance probe. A model shows that air seeping through
the sand bed in response to spatial variations of static pressure along the ripple surface
guides water vapor through ripple crests and gradually stores dust beneath troughs. The
accumulated dust remains trapped beneath the relatively compact trough surface until wind
is violent enough to mobilize sand deeply.
We present stratigraphic measurements of humidity and bulk density beneath the surface of a barchan dune obtained with a capacitance probe. A model shows that air seeping through the sand bed in response to spatial variations of static pressure along the ripple surface guides water vapor through ripple crests and gradually stores dust beneath troughs. The accumulated dust remains trapped beneath the relatively compact trough surface until wind is violent enough to mobilize sand deeply.
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