Is there evidence for global-scale forcing of southern hemisphere Quaternary desert dune accumulation? A quantitative method for testing hypotheses of dune system development
Luminescence dating of desert dune sediments has generated many hundreds of ages, many used in reconstructions of Quaternary environmental changes, others in attempts to elucidate dune processes. Environmental and climatic interpretations of these records have proved problematic and it remains chall...
| Main Authors: | , |
|---|---|
| Format: | Journal article |
| Published: |
Wiley
2017
|
| _version_ | 1826269143044718592 |
|---|---|
| author | Thomas, D Bailey, R |
| author_facet | Thomas, D Bailey, R |
| author_sort | Thomas, D |
| collection | OXFORD |
| description | Luminescence dating of desert dune sediments has generated many hundreds of ages, many used in reconstructions of Quaternary environmental changes, others in attempts to elucidate dune processes. Environmental and climatic interpretations of these records have proved problematic and it remains challenging to test hypotheses of the systematic response of dunefields to changes in external forcing in the past and to make predictions of the future. We use a method that quantifies dune sediment accumulation to interpret dune luminescence age datasets, rather than simply using the ages themselves as proxies of change. The Accumulation Intensity method allows periods of dune sediment accumulation, here over the timescale 102-105 years, to be identified from compilations of dated sand sea stratigraphic sequences. We apply this approach to two of the largest dune age datasets, from southern Africa and Australia, testing whether or not dunefield accumulation has co- varied in the Late Quaternary and whether systematic relationships to external drivers at global, hemispheric, regional and local scales can be identified. |
| first_indexed | 2024-03-06T21:20:26Z |
| format | Journal article |
| id | oxford-uuid:4144c7e6-2523-4ec1-9c4d-5084e8b9d160 |
| institution | University of Oxford |
| last_indexed | 2024-03-06T21:20:26Z |
| publishDate | 2017 |
| publisher | Wiley |
| record_format | dspace |
| spelling | oxford-uuid:4144c7e6-2523-4ec1-9c4d-5084e8b9d1602022-03-26T14:42:39ZIs there evidence for global-scale forcing of southern hemisphere Quaternary desert dune accumulation? A quantitative method for testing hypotheses of dune system developmentJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:4144c7e6-2523-4ec1-9c4d-5084e8b9d160Symplectic Elements at OxfordWiley2017Thomas, DBailey, RLuminescence dating of desert dune sediments has generated many hundreds of ages, many used in reconstructions of Quaternary environmental changes, others in attempts to elucidate dune processes. Environmental and climatic interpretations of these records have proved problematic and it remains challenging to test hypotheses of the systematic response of dunefields to changes in external forcing in the past and to make predictions of the future. We use a method that quantifies dune sediment accumulation to interpret dune luminescence age datasets, rather than simply using the ages themselves as proxies of change. The Accumulation Intensity method allows periods of dune sediment accumulation, here over the timescale 102-105 years, to be identified from compilations of dated sand sea stratigraphic sequences. We apply this approach to two of the largest dune age datasets, from southern Africa and Australia, testing whether or not dunefield accumulation has co- varied in the Late Quaternary and whether systematic relationships to external drivers at global, hemispheric, regional and local scales can be identified. |
| spellingShingle | Thomas, D Bailey, R Is there evidence for global-scale forcing of southern hemisphere Quaternary desert dune accumulation? A quantitative method for testing hypotheses of dune system development |
| title | Is there evidence for global-scale forcing of southern hemisphere Quaternary desert dune accumulation? A quantitative method for testing hypotheses of dune system development |
| title_full | Is there evidence for global-scale forcing of southern hemisphere Quaternary desert dune accumulation? A quantitative method for testing hypotheses of dune system development |
| title_fullStr | Is there evidence for global-scale forcing of southern hemisphere Quaternary desert dune accumulation? A quantitative method for testing hypotheses of dune system development |
| title_full_unstemmed | Is there evidence for global-scale forcing of southern hemisphere Quaternary desert dune accumulation? A quantitative method for testing hypotheses of dune system development |
| title_short | Is there evidence for global-scale forcing of southern hemisphere Quaternary desert dune accumulation? A quantitative method for testing hypotheses of dune system development |
| title_sort | is there evidence for global scale forcing of southern hemisphere quaternary desert dune accumulation a quantitative method for testing hypotheses of dune system development |
| work_keys_str_mv | AT thomasd isthereevidenceforglobalscaleforcingofsouthernhemispherequaternarydesertduneaccumulationaquantitativemethodfortestinghypothesesofdunesystemdevelopment AT baileyr isthereevidenceforglobalscaleforcingofsouthernhemispherequaternarydesertduneaccumulationaquantitativemethodfortestinghypothesesofdunesystemdevelopment |