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Scale-dependent coupling between aeolian form and flow / Andrew Lewis Gunn.
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View online- Format:
- Book
- Thesis/Dissertation
- Author/Creator:
- Gunn, Andrew Lewis, author.
- Language:
- English
- Subjects (All):
- Geomorphology.
- Atmospheric sciences.
- Geology.
- Earth and Environmental Science--Penn dissertations.
- Penn dissertations--Earth and Environmental Science.
- Local Subjects:
- Geomorphology.
- Atmospheric sciences.
- Geology.
- Earth and Environmental Science--Penn dissertations.
- Penn dissertations--Earth and Environmental Science.
- Genre:
- Academic theses.
- Physical Description:
- 1 online resource (225 pages)
- Contained In:
- Dissertations Abstracts International 82-12B.
- Place of Publication:
- [Philadelphia, Pennsylvania] : University of Pennsylvania ; Ann Arbor : ProQuest Dissertations & Theses, 2021.
- Language Note:
- English
- System Details:
- Mode of access: World Wide Web.
- text file
- Summary:
- Where there are erodible and durable grains and sufficiently strong winds to move them, erosion and deposition produces dunes. Dune fields are a coarsening pattern that defines large swaths of planetary landscapes. They exchange momentum and heat with the atmosphere, which in turn alters winds, creating a coupling between flow and form at the planetary surface. In this dissertation I investigate how surface properties of dune fields alter the winds that produce them, what conditions are necessary for dune growth and if it saturates, and how dune fields may respond to changing climate in the near future. These studies use a blend of scientific methods and are framed as problems in dynamics; investigations of non-uniformity, non-stationarity, saturation and thresholds. I show how the atmospheric boundary layer's response to the roughness and low thermal inertia of dune fields creates spatial and temporal heterogeneity in dune-field activity, respectively. I argue that Earth's dune coarsen indefinitely, predict that they will become less active during this century, and put bounds on the requisite winds and grain properties for their existence on bodies in the Solar System. This dissertation offers novel and generic contributions to the field of aeolian geomorphology applicable at the dune-field scale.
- Notes:
- Source: Dissertations Abstracts International, Volume: 82-12, Section: B.
- Includes supplementary digital materials.
- Advisors: Jerolmack, Douglas J.; Committee members: David Goldsby; Paulo Arratia; David Mohrig.
- Department: Earth and Environmental Science.
- Ph.D. University of Pennsylvania 2021.
- Local Notes:
- School code: 0175
- ISBN:
- 9798738643521
- Access Restriction:
- Restricted for use by site license.
- This item must not be sold to any third party vendors.
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