Matches in SemOpenAlex for { <https://semopenalex.org/work/W3133886355> ?p ?o ?g. }
Showing items 1 to 70 of
70
with 100 items per page.
- W3133886355 abstract "<p>Many dryland regions of the world are at high risk of desertification from combined human land use and anthropogenic climate change. One symptom of desertification is the reactivation of previously stable dunefields. Since morphologies of stable dunes are thought to reflect wind regimes at the time of their formation, the degree to which dune orientation reflects modern winds may be one way to assess changes in wind regimes and the progression of desertification in a region.</p><p>Here we investigate the relationship between wind dynamics and desert dune orientation in one region at risk of desertification, southeast Kazakhstan in Central Asia, on the basis of open-source software and open-access datasets. Using Google Earth Engine, we map dunes or interdune spaces within six palaeo-dunefields in the Ili-Balkhash area, by performing a multi-layer object-based image analysis (OBIA) on satellite remote sensing data (Sentinel-2 optical imagery and SRTM digital elevation models). A semi-automated GIS approach is used to undertake data cleansing and the quantification of dominant palaeo-dunefield orientations. The resulting orientation trends are concurrent with the region&#8217;s topography: The dunefields within the Ili valley show a narrow, mostly E-W oriented trend concurrent with the course of the valley while the orientation ranges become broader towards the open pre-Balkhash area.</p><p>We then predict modern dune orientations by applying the maximum gross bedform-normal transport rule on reanalysed wind data for 2008-2018. This approach by Rubin and Hunter (1987) allows the deduction of sand transport and resulting bedform trends from wind direction frequencies. The predicted modern orientation trends for the dunefields in the Ili-Balkhash area yield only partial consensus with observed palaeo-bedform trends. We therefore propose that modern wind regimes are not exclusively responsible for existing dune morphologies in the region, and that dune orientation may be inherited from earlier wind regimes.</p>" @default.
- W3133886355 created "2021-03-15" @default.
- W3133886355 creator A5023787844 @default.
- W3133886355 creator A5037288005 @default.
- W3133886355 creator A5041202612 @default.
- W3133886355 creator A5043492077 @default.
- W3133886355 date "2021-03-04" @default.
- W3133886355 modified "2023-10-16" @default.
- W3133886355 title "Dunes as palaeo-wind vanes: Investigating palaeowind regimes using semi-automated remote sensing approaches to dunefield mapping and orientation quantification " @default.
- W3133886355 doi "https://doi.org/10.5194/egusphere-egu21-6067" @default.
- W3133886355 hasPublicationYear "2021" @default.
- W3133886355 type Work @default.
- W3133886355 sameAs 3133886355 @default.
- W3133886355 citedByCount "0" @default.
- W3133886355 crossrefType "posted-content" @default.
- W3133886355 hasAuthorship W3133886355A5023787844 @default.
- W3133886355 hasAuthorship W3133886355A5037288005 @default.
- W3133886355 hasAuthorship W3133886355A5041202612 @default.
- W3133886355 hasAuthorship W3133886355A5043492077 @default.
- W3133886355 hasConcept C100970517 @default.
- W3133886355 hasConcept C114793014 @default.
- W3133886355 hasConcept C127313418 @default.
- W3133886355 hasConcept C16345878 @default.
- W3133886355 hasConcept C180093795 @default.
- W3133886355 hasConcept C181843262 @default.
- W3133886355 hasConcept C184149073 @default.
- W3133886355 hasConcept C18903297 @default.
- W3133886355 hasConcept C205649164 @default.
- W3133886355 hasConcept C2524010 @default.
- W3133886355 hasConcept C2778102629 @default.
- W3133886355 hasConcept C33559203 @default.
- W3133886355 hasConcept C33923547 @default.
- W3133886355 hasConcept C49204034 @default.
- W3133886355 hasConcept C58640448 @default.
- W3133886355 hasConcept C62649853 @default.
- W3133886355 hasConcept C86803240 @default.
- W3133886355 hasConceptScore W3133886355C100970517 @default.
- W3133886355 hasConceptScore W3133886355C114793014 @default.
- W3133886355 hasConceptScore W3133886355C127313418 @default.
- W3133886355 hasConceptScore W3133886355C16345878 @default.
- W3133886355 hasConceptScore W3133886355C180093795 @default.
- W3133886355 hasConceptScore W3133886355C181843262 @default.
- W3133886355 hasConceptScore W3133886355C184149073 @default.
- W3133886355 hasConceptScore W3133886355C18903297 @default.
- W3133886355 hasConceptScore W3133886355C205649164 @default.
- W3133886355 hasConceptScore W3133886355C2524010 @default.
- W3133886355 hasConceptScore W3133886355C2778102629 @default.
- W3133886355 hasConceptScore W3133886355C33559203 @default.
- W3133886355 hasConceptScore W3133886355C33923547 @default.
- W3133886355 hasConceptScore W3133886355C49204034 @default.
- W3133886355 hasConceptScore W3133886355C58640448 @default.
- W3133886355 hasConceptScore W3133886355C62649853 @default.
- W3133886355 hasConceptScore W3133886355C86803240 @default.
- W3133886355 hasLocation W31338863551 @default.
- W3133886355 hasOpenAccess W3133886355 @default.
- W3133886355 hasPrimaryLocation W31338863551 @default.
- W3133886355 hasRelatedWork W17585664 @default.
- W3133886355 hasRelatedWork W18354225 @default.
- W3133886355 hasRelatedWork W23042495 @default.
- W3133886355 hasRelatedWork W24294660 @default.
- W3133886355 hasRelatedWork W33603313 @default.
- W3133886355 hasRelatedWork W34693813 @default.
- W3133886355 hasRelatedWork W42648374 @default.
- W3133886355 hasRelatedWork W53376887 @default.
- W3133886355 hasRelatedWork W73883561 @default.
- W3133886355 hasRelatedWork W52525226 @default.
- W3133886355 isParatext "false" @default.
- W3133886355 isRetracted "false" @default.
- W3133886355 magId "3133886355" @default.
- W3133886355 workType "article" @default.