Mathematics – Logic
Scientific paper
Jan 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012georl..3902306h&link_type=abstract
Geophysical Research Letters, Volume 39, Issue 2, CiteID L02306
Mathematics
Logic
Global Change: Geomorphology And Weathering (0790, 1824, 1825, 1826, 1886), Global Change: Remote Sensing (1855, 4337), Hydrology: Geomorphology: General (1625)
Scientific paper
From high-resolution satellite imagery of barchan sand dunes, we provide geomorphological evidence of collisions that result in the ejection of a barchan from the wake of another barchan dune. Previous interpretations suggest this outcome is evidence of soliton or solitary wave behaviour; however, the physical mechanisms for mass exchange are not fully understood, resulting in debate. Our evidence and interpretation indicates that mass is transferred to the upwind barchan by shadowing a portion of downwind barchan's stoss slope. Turbulent, unsaturated airflow erodes the surface between the dunes, creating a smaller dune that ejects from the wake region. Previous observations lacked the spatial resolution required to document this process; therefore, our observations clarify the collision dynamics of barchans. A broader implication of our observations is the role of collisions in maintaining an “equilibrium” size distribution in barchan swarms.
Barchyn Thomas E.
Hugenholtz Chris H.
No associations
LandOfFree
Real barchan dune collisions and ejections does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Real barchan dune collisions and ejections, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Real barchan dune collisions and ejections will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-910586