how was the badain jaran dunes formed
Sci. (2009). The wind tunnel experiments and the particle size analysis showed that the averaged sand fractions (50~2000 m in diameter) and loess-sized fractions (<50 m in diameter) were 93.9% and 6.1%, respectively. Results indicated it would take an average theoretical time of 80.8 ka and 4,475.9 ka to form the current dimensions of the BJD and CLP, respectively, which means the Gobi Desert may provide substantial sand sources to the modern BJD, while its contribution to the loess of modern CLP might be overestimated despite it was the key sources of the CLP in Quaternary. Variations of this basic formula have been produced for different purposes, but the fact that the movement rate of dunes changes linearly with the reciprocal of dune height is adequately confirmed by field observations (Figure 5). The European Physical Journal Special Topics 223(11):22692283, Ping L, Narteau C, Dong Z, Zhang Z, Courrech du Pont S (2014) Emergence of oblique dunes in a landscape-scale experiment. Therefore, this study attempts to obtain information regarding the movement of megadunes in the Badain Jaran Sand Sea that features the tallest megadunes on the Earth (Wang et al., 2020). 23 (2), 497500. Thomas, D. S. G. (1992). Aeolian Geomorphology: An Introduction. Sun, J. Provenance of Loess material and formation of loess deposits on the Chinese Loess Plateau. Equivalent dose of quartz originating from ceramics was obtained by OSL single aliquot regenerative dose (SAR) method, measured at 260C of preheat and 220C of cutheat. Geophysical Research Letters 35, https://doi.org/10.1029/2007gl031672 (2008). 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Understanding sand dunes activity and dynamics not only is relevant to the studies of aeolian processes and the morphological development of different dune types but also has considerable implications for the recognition and interpretation of dunes to which further significance can be linked with paleoclimatic studies (Thomas, 1992). MODIS Web Environmental Earth Sciences But even a flat layer of sand is unstable because grain sizes differ and respond differently to the same breeze. (1980). Timing is the most. doi:10.1016/j.geomorph.2008.10.010, Phillips, J. D. (1992). All these dune types may occur in three forms: simple, compound, and complex . Badain Jaran Dunes, China. J. Like Atlas Obscura and get our latest and greatest stories in your Facebook feed. Geophys. Emergence of oblique dunes in a landscape-scale experiment Journal of Asian Earth Sciences 177:240249, Day M, Kocurek G (2018) Pattern similarity across planetary dune fields. doi:10.1086/626622, Lmmel, M., Meiwald, A., Yizhaq, H., Tsoar, H., Katra, I., and Kroy, K. (2018). 1) within the Gobi Desert were employed to further analyses. Journal of Geophysical Research 113(F2):121, Ewing RC, Kocurek G (2010a) Aeolian dune-field pattern boundary conditions. (2012). Formation and Growth of High Megadunes in Badain Jaran Desert. Drastic climatic shift at 2.8Ma as recorded in eolian deposits of China and its implications for redefining the Pliocene-Pleistocene boundary. Star dunes form as a result of wind blowing sand from different directions. Earth and Planetary Science Letters 203, 845859 (2002). The European Physical Journal E 42:42, Parteli E, Kroy K, Tsoar H, Andrade J, Pschel T (2014) Morphodynamic modeling of aeolian dunes: Review and future plans. Stevens, T. et al. Elongation and Stability of a Linear Dune. Geomorphology of the megadunes in the Badain Jaran Desert The black dots indicate the meteorological stations employed in this study. In combination with other morphometric evidences, it exemplifies the assumption that the development of megadunes is predominantly controlled by wind rather than other factors such as the underlying relief and ground water, as accepted by most researchers. Barchan Dunes of Imperial Valley, California. Any product that may be evaluated in this article, or claim that may be made by its manufacturer, is not guaranteed or endorsed by the publisher. Article & Dorjnamjaa, D. Quaternary alluvial fans in the Gobi of southern Mongolia: evidence for neotectonics and climate change. Investigation of the Sand Sea with the Tallest Dunes on Earth: China's Badain Jaran Sand Sea. Formed by. The Gobi Desert, Badain Jaran Desert (BJD), and the Chinese Loess Plateau (CLP, Fig. Therefore it is probable that LL-1 accumulated during the . Tracing the provenance of fine-grained dust deposited on the central Chinese Loess Plateau. However, more robust evidences are waiting for the deeper drill cores. 180 Mystery Lakes of the Badain Jaran Desert hannahlund252 (Atlas Obscura User) The spring-fed lakes in the Badain Jaran Desert are not mirages. In that case, we speculate there are at least three factors facilitating the mega-dunes in Badain Jaran desert different from other transversal dunes that can preserve LGM sediments. Both ends (about 30mm) of the sediment in the tube that were thought to be exposed were excluded in OSL dating. Wind tunnel experiments were performed in the Key Laboratory of Desert and Desertification, Chinese Academy of Sciences, China. . Science Press, Beijing, Telfer MW, Parteli EJR, Radebaugh J, Beyer RA, Bertrand T, Forget F, Nimmo F, Grundy WM, Moore JM, Stern SA, Spencer J, Lauer TR, Earle AM, Binzel RP, Weaver HA, Olkin CB, Young LA, Ennico K, Runyon K, The New Horizons Geology, Geophysics and Imaging Science Theme Team (2018) Dunes on Pluto. The reliability of the OSL dating results is suggested in two aspects. The large size of megadunes and the wind regime are largely responsible for the slow advancement rate of the megadunes in the Badain Jaran Sand Sea. Annals of the Association of American Geographers 60, 560577 (1970). doi:10.1016/1350-4487(94)90086-8, Qian, G., Yang, Z., Tian, M., Dong, Z., Liang, A., and Xing, X. Details of the experimental processes are described in Supplementary InformationS4. Pattern analysis can estimate dune formation ages, judge wind conditions and extract environmental signals from the common pattern parameters of active dune field. When the winds constantly blow from the same direction over relatively flat terrain with a small to moderate amount of sand, the sand will pile up in crescent-moon shaped dunes, whose thin tips point in the direction of the wind flow. The dune has an estimated height of 1640 feet (500 meters) and it sits on Badain desert that covers 30447 miles (49000 kilometers). Geomorphology 99(14):186204, Dong Z, Wang T, Wang X (2004) Geomorphology of the megadunes in the Badain Jaran Desert. Google Scholar. These tall sand dunes account for 61% of the desert area. doi:10.1007/BF01821323. It covers an area of 49,000 square kilometers (19,000 sq mi; 12,000,000 acres). 4) The advancement of megadunes adds more evidence to support the fact that the development of megadunes in the Badain Jaran Sand Sea is controlled dominantly by wind rather than other factors such as the underlying relieves, ground water, etc. volume9, Articlenumber:985 (2019) More detailed descriptions of the data processing are shown in Supplementary InformationS7. Sediments at different depth on slipfaces of the three megadunes (Figure 1; Table 1) were sampled according to the OSL dating protocols. By comparison, fluvial processes, taken Heihe River for instance (Fig. 46 (24), 1452114530. This reversed crest zone is the most active part of the megadune, and migrates back and forth in response to variations in wind direction. doi:10.1038/s41567-018-0106-z, Lancaster, N. (1994). The images or other third party material in this article are included in the articles Creative Commons license, unless indicated otherwise in a credit line to the material. doi:10.1007/BF03187228, Yang, X., Scuderi, L., Liu, T., Paillou, P., Li, H., Dong, J., et al. Hence, the megadunes advance towards southeast. Aeolian Sand Sorting and Megaripple Formation. The analyzed results showed that under modern wind regime the potential erosion rates on the Gobi Desert varied between 0.41 and 0.89mm a1, which were potential sand sources for the BJD formation with relatively low contributions to the loess of the CLP. Recent observations reveal that the megadune-lake system exists as a unique local air circulation with radiation of wind from lake throughout the year (Figure 3, unpublished data), resulting climbing sands on the slipfaces, retarding advancement, and heightening of megadunes. Progress in Geography 29(9):10871094 (in Chinese). Creative Commons Attribution License (CC BY). Meas. doi:10.1016/S0140-1963(18)30654-2, Vermeesch, P., and Drake, N. (2008). Der olische Sandstrom aus der W-Sahara zur Atlantikkste. YZ did the OSL experiment. Anyone you share the following link with will be able to read this content: Sorry, a shareable link is not currently available for this article. It is therefore deduced that wind is predominantly responsible for the development of megadunes in the Badain Jaran Sand Sea. However, the time span they cover is different, implying that the megadunes have different advancement rate. CAS ADS Badain Jaran Desert is famous for its five wonders, namely, sandy peaks, singing dunes, colorful lakes, clear springs, and ancient temples. Stretching almost 2,000 feet, this painting is one of the longest pieces of Buddhist artwork in the world. They contend that this groundwater concentrates in some areas to form springs, which feeds a layer of freshwater into deeper lakes. Professional Paper. Secondly, it is impossible even to calculate a rough estimate as all the theoretical and empirical formulae developed for the movement rate of dunes have their own specific boundary conditions (Livingstone and Warren, 1996). Science 360(6392):992997, USGS (2018) Earth explorer. Aeolian Research 39:112, Sharp RP (1963) Wind ripples. Geomorphology 135(12):108116, Yang Y, Qu Z, Shi P, Liu L, Zhang G, Tang Y, Hu X, Lv Y, Xiong Y, Wang J, Shen L, Lv L, Sun S (2014) Wind regime and sand transport in the corridor between the Badain Jaran and Tengger deserts, central Alxa Plateau, China. Located near Alashan Youqi in Western Inner Mongolia Autonomous Prefecture, roughly 100 of such lakes nestle in-between Megadunes - mammoth sand dunes, among the largest in the world. Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences (CAS), China, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences (CAS), China. The analysis pertaining to Dong et al. 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how was the badain jaran dunes formed
