Abstract
Barchan dunes—which have a crescent shape with two horns pointing downwind—may undergo a transition to a longitudinal (seif) dune under a bimodal wind regime. Understanding the barchan–seif dune transition is important for the research of dune field evolution and for the investigation of planetary climate and wind regimes. Two models have been proposed to explain the barchan–seif dune transition: Bagnold (The physics of blown sand and desert dunes. Methuen, London, 1941) and Tsoar (Z Geomorphol 28:99–103, 1984). The significance of both models has been investigated through much field and modeling works over the last few decades. However, the conditions for the barchan–seif dune transition as well as the models proposed to explain it are still poorly understood. To correct this situation, here we present and discuss some examples of asymmetric barchans and barchan–seif transitional dune morphologies occurring in nature and show how to characterize wind regimes and identify the relevance of different factors leading to the observed patterns (in addition to wind directionality). Bagnold’s and Tsoar’s models were conceived to explain the barchan–seif dune transition under asymmetric bimodal winds. They were not conceived to explain all types of barchan asymmetry. However, these models must be evaluated in the light of an insight that has been gained more recently, from field investigations, experiments and numerical simulations: The seif dune forms only if the divergence angle between the two main wind directions is ≥90°.
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References
Almeida MP, Parteli EJR, Andrade JS, Herrmann HJ (2008) Giant saltation on Mars. PNAS USA 105:6222–6226
Ashkenazy Y, Yizhaq H, Tsoar H (2012) Sand dune mobility under climate change in the Kalahari and Australian deserts. Clim Chan 112:901–923
Bagnold RA (1941) The physics of blown sand and desert dunes. Methuen, London
Bourke MC (2010) Barchan dune asymmetry: observations from Mars and Earth. Icarus 205:183–197
Bourke MC, Balme M, Zimbelman JR (2004) A comparative analysis of barchan dunes in the intra-crater dune fields and the North Polar Sand Sea, LPSC XXXV abst. 1453
Bullard JE (1997) A note on the use of the Fryberger method for evaluating potential sand transport by wind. J Sediment Res 67:499–501
Carson MA, MacLean PA (1985) Hybrid eolian dunes of William River dune field, Northern Saskatchewan, Canada. Am Assoc Petrol Geol Bull 69:242–243
Dong Z, Wei Z, Qian G, Zhang Z, Luo W, Hu G (2010) “Raked” linear dunes in the Kumtagh Desert, China. Geomorphology 123:122–128
Durán O, Parteli EJR, Herrmann HJ (2010) A continuous model for sand dunes: review, new developments and application to barchan dunes and barchan dune fields. Earth Surf Proc Landf 35:1591–1600
Embabi NS, Ashour MM (1993) Barchan dunes in Qatar. J Arid Environ 25:49–69
Finkel HJ (1959) The barchans of southern Peru. J Geol 67:614–647
Fryberger SG, Dean G (1979) Dune forms and wind regime. In: McKee E (ed) A study of global sand seas, pp 137–169
Gay SP (1999) Observations regarding the movement of barchan sand dunes in the Nazca to Tanaca area of southern Peru. Geomorphology 27:279–293
Haff PK, Presti DE (1995) Barchan dunes of the Salton Sea Region, California. In: Tchakerian VP (ed) Desert aeolian processes. Chapman & Hall, London, pp 153–177
Hamdan MA, Refaat AA, Wahed MA (2016) Morphologic characteristics and migration rate assessment of barchan dunes in the Southeastern Western Desert of Egypt. Geomorphology 257:57–74
Hastenrath SL (1967) The Barchans of the Arequipa region, southern Peru. Z Geomorphol 11:300–331
Hersen P (2004) On the crescentic shape of barchan dunes. Eur Phys J B 37:507–514
Hersen P, Douady S, Andreotti B (2002) Relevant length scale of barchan dunes. Phys Rev Lett 89:264301
Hesp PA, Hastings K (1998) Width, height and slope relationships and aerodynamic maintenance of barchans. Geomorphology 22:193–204
Howard AD, Morton JB, Gad-el-Hak M, Pierce DB (1978) Sand transport model of barchan dune equilibrium. Sedimentology 25:307–338
Iversen JD, Rasmussen KR (1999) The effect of wind speed and bed slope on sand transport. Sedimentology 46:723–731
Kawamura R (1951) Study of sand movement by wind. Translated (1965) as University of California Hydraulics Engineering Laboratory Report HEL 2-8 Berkeley
Kok JF, Parteli EJR, Michaels TI, Bou Karam D (2012) The physics of wind-blown sand and dust. Rep Prog Phys 75:106901
Kroy K, Sauermann G, Herrmann HJ (2002) Minimal model for sand dunes. Phys Rev Lett 88:054301
Lettau K, Lettau HH (1978) Experimental and micro-meteorological field studies of dune migration. In: Lettau HH, Lettau K (eds) Exploring the World’s Driest Climate (IES Report 101:110-147), University of Wisconsin-Madison, Institute for Environmental Studies, Madison
Long JT, Sharp RP (1964) Barchan-dune movement in Imperial Valley, California. Geol Soc Am Bull 75:149–156
Lv P, Dong Z, Narteau C, Rozier O (2016) Morphodynamic mechanisms for the formation of asymmetric barchans: improvement of the Bagnold and Tsoar models. Environ Earth Sci 75:259
Miot da Silva G, Hesp P (2010) Coastline orientation, aeolian sediment transport and foredune and dunefield dynamics of Moçambique Beach, Southern Brazil. Geomorphology 120:258–278
Momiji H, Bishop SR (2002) Estimating the windward slope profile of a barchan dune. Sedimentology 49:467–481
Moosavi V, Moradi H, Shamsi SRF, Shirmohammadi B (2014) Assessment of the planimetric morphology of barchan dunes. Catena 120:12–19
Norris RM (1966) Barchan dunes of imperial valley California. J Geol 74:292–306
Owen PR (1964) Saltation of uniform grains in air. J Fluid Mech 20:225–242
Parteli EJR, Herrmann HJ (2007) Saltation transport on Mars. Phys Rev Let 98:198001
Parteli EJR, Durán O, Tsoar H, Schwämmle V, Herrmann HJ (2009) Dune formation under bimodal winds. PNAS USA 106:22085–22089
Parteli EJR, Durán O, Bourke MC, Tsoar H, Pöschel T, Herrmann H (2014a) Origins of barchan dune asymmetry: insights from numerical simulations. Aeolian Res 12:121–133
Parteli EJR, Kroy K, Tsoar H, Andrade JS Jr, Pöschel T (2014b) Morphodynamic modeling of aeolian dunes: review and future plans. Eur Phys J Spec Topics 223:2269–2283
Pearce KI, Walker IJ (2005) Frequency and magnitude biases in the ‘Fryberger’ model, with implications for characterizing geomorphically effective winds. Geomorphology 68:39–55
Ping L, Narteau C, Dong Z, Zhang Z, Courrech du Pont S (2014) Emergence of oblique dunes in a landscape-scale experiment. Nature Geosci 7:99–103
Pye K, Tsoar H (1990) Aeolian Sand and Sand Dunes. Unwin Hyman, London
Reffet E, Courrech du Pont S, Hersen P, Douady S (2010) Formation and stability of transverse and longitudinal sand dunes. Geology 38:491–494
Rubin DM (2012) A unifying model for planform straightness of ripples and dunes in air and water. Earth-Sci Rev 113:176–185
Rubin DM, Hunter R (1987) Bedform alignment in directionally varying flows. Science 237:276–278
Rubin DM, Ikeda H (1990) Flume experiments on the alignment of transverse, oblique, and longitudinal dunes in directionally varying flows. Sedimentology 37:673–684
Rubin DM, Tsoar H, Blumberg DG (2008) A second look at western Sinai seif dunes and their lateral migration. Geomorphology 93:335–342
Sauermann G, Rognon P, Poliakov A, Herrmann HJ (2000) The shape of the barchan dunes of Southern Morocco. Geomorphology 36:47–62
Sauermann G, Kroy K, Herrmann HJ (2001) Continuum saltation model for sand dunes. Phys Rev E 64:031305
Sauermann G, Andrade JS Jr, Maia LP, Costa UMS, Araújo AD, Herrmann HJ (2003) Wind velocity and sand transport on a barchan dune. Geomorphology 54:245–255
Shehata W, Bader T, Irtem O, Ali A, Abdallah M, Aftab S (1992) Rate and mode of barchan dunes advance in the central part of the Jafura sand sea. J Arid Environ 23:1–17
Sorensen M (2004) On the rate of aeolian sand transport. Geomorphology 54:53–62
Tsoar H (1984) The formation of seif dunes from barchans—a discussion. Z Geomorphol 28:99–103
Tsoar H (1995) Desertification in Northern Sinai in the eighteenth century. Clim Change 29:429–438
Tsoar H (2001) Types of aeolian sand dunes and their formation. Geomorph Fluid Mech 582:403–429
Ungar JE, Haff PK (1987) Steady-state saltation in air. Sedimentology 34:289–299
Uppala SM, Kallberg PW, Simmons AJ, Andrae U, da Costa Bechtold V, Fiorino M, Gibson JK, Haseler J, Hernandez A, Kelly GA, Li X, Onogi K, Saarinen S, Sokka N, Allan RP, Andersson E, Arpe K, Balmaseda MA, Beljaars ACM, van de Berg L, Bidlot J, Bormann N, Caires S, Chevallier F, Dethof A, Dragosavac M, Fisher M, Fuentes M, Hagemann S, Holm E, Hoskins BJ, Isaksen L, Janssen PAEM, Jenne R, McNally A, Mahfouf J-F, Morcrette J-J, Rayner NA, Saunders RW, Simon P, Sterl A, Trenberth KE, Untch A, Vasiljevic D, Viterbo P, Woollen J (2005) The ERA-40 reanalysis. Quart J Roy Meteor Soc 131:2961–3012
Wasson RJ, Hyde R (1983) Factors determining desert dune type. Nature 304:337–339
Werner BT (1995) Eolian dunes: computer simulation and attractor interpretation. Geology 23:1107–1110
Wiggs GFS (2001) Desert dune processes and dynamics. Prog Phys Geogr 25:53–79
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E.J.R.P. acknowledges financial support from DFG (German Research Foundation) Grant RI 2497/3-1.
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Tsoar, H., Parteli, E.J.R. Bidirectional winds, barchan dune asymmetry and formation of seif dunes from barchans: a discussion. Environ Earth Sci 75, 1237 (2016). https://doi.org/10.1007/s12665-016-6040-4
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DOI: https://doi.org/10.1007/s12665-016-6040-4