Source-To-Sink Aeolian Fluxes From Arid Landscape Dynamics in the Lut Desert
Chanteloube, Colin; Barrier, Laurie; Derakhshani, Reza; Gadal, Cyril; Braucher, Régis; Payet, Vincent; Léanni, Laëtitia; Narteau, Clément
(2022) Geophysical Research Letters, volume 49, issue 4, pp. 1 - 13
(Article)
Abstract
We analyze major landforms of the Lut Desert in Iran to provide a comprehensive source-to-sink picture of aeolian systems on time scales from decades to millions of years. We map the modern sandflows, along which we evaluate the volume and chronology associated with the excavation of mega-yardangs upwind and the
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formation of giant dunes downwind. Sediment discharges deduced from long-term erosion and deposition are of the same order of magnitude (105–106 m3 yr−1) as short-term and medium-term sand discharges derived from wind data and dune morphodynamics. At the scale of the internal aeolian sediment-routing system of the Lut, we establish an overall sediment budget constrained by the joint development of the erosional and depositional landforms. Our findings thus quantify the geomorphic controls of aeolian processes on arid landscapes at multiple length and time scales, while providing information on mass exchanges between continents and atmosphere.
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Keywords: Lut desert, aeolian transport, dunes, landscape dynamics, source-to-sink, yardangs, Taverne, Geophysics, General Earth and Planetary Sciences
ISSN: 0094-8276
Publisher: Wiley Online Library
Note: Funding Information: The authors acknowledge financial support from the UnivEarthS LabEx program (ANR‐10‐LABX‐0023), the IdEx Université de Paris (ANR‐18‐IDEX‐0001), the IPGP BQR and CNRS‐INSU SYSTER programs, the French National Research Agency (ANR‐17‐CE01‐0014), the National Science Center of Poland (Grant 2016/23/B/ST10/01700), and the French Chinese International laboratory SALADYN. The ASTER AMS national facility (CEREGE, Aix‐en‐Provence) is supported by the INSU‐CNRS, the IRD, and the ANR through the “Projets thématiques d'excellence” program for the “Equipements d'excellence” ASTER‐CEREGE action. The ASTER Team (Aumaître G., Bourlès D.L., and K. Keddadouche) are thanked for, their expertise in AMS. We also thank Paul Kapp and an anonymous reviewer for their careful reading of our manuscript and their insightful comments and suggestions. This publication is IPGP contribution #4252. It contains modified Copernicus Climate Change Service Information (2020). Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus Information or Data it contains. Funding Information: The authors acknowledge financial support from the UnivEarthS LabEx program (ANR-10-LABX-0023), the IdEx Universit? de Paris (ANR-18-IDEX-0001), the IPGP BQR and CNRS-INSU SYSTER programs, the French National Research Agency (ANR-17-CE01-0014), the National Science Center of Poland (Grant 2016/23/B/ST10/01700), and the French Chinese International laboratory SALADYN. The ASTER AMS national facility (CEREGE, Aix-en-Provence) is supported by the INSU-CNRS, the IRD, and the ANR through the ?Projets th?matiques d'excellence? program for the ?Equipements d'excellence? ASTER-CEREGE action. The ASTER Team (Auma?tre G., Bourl?s D.L., and K. Keddadouche) are thanked for, their expertise in AMS. We also thank Paul Kapp and an anonymous reviewer for their careful reading of our manuscript and their insightful comments and suggestions. This publication is IPGP contribution #4252. It contains modified Copernicus Climate Change Service Information (2020). Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus Information or Data it contains. Publisher Copyright: © 2022. American Geophysical Union. All Rights Reserved.
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