Glacial geomorphology of the Tian Shan

Stroeven, Arjen P.; Hättestrand, Clas; Heyman, Jakob; Klemån, Johan; Morén, Björn

doi:10.1080/17445647.2013.820879

Cited by 42 publications

(32 citation statements)

References 23 publications

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“…The association of warm and wet conditions stands in contrast to the dry and cold climate characterising the glacial maxima in Central Asia (Cheng et al ., ). Finally, in the modern dry and warm conditions, glaciers are mostly confined to cirques (Stroeven et al ., ). The post‐LGM increase in temperature is also recorded by the speleothem δ 18 O record from Kesang Cave (Figs and f; Cheng et al ., ; Cai et al ., ).…”

Section: Pleistocene Climate and Aggradation–incision Cyclesmentioning

confidence: 97%

Lag and mixing during sediment transfer across the Tian Shan piedmont caused by climate‐driven aggradation–incision cycles

et al. 2017

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Transient sediment storage and mixing of deposits of various ages during transport across alluvial piedmonts alters the clastic sedimentary record. We quantify buffering and mixing during cycles of aggradation-incision in the north piedmont of the Eastern Tian Shan. We complement existing chronologic data with 20 new luminescence ages and one cosmogenic radionuclide age of terrace abandonment and alluvial aggradation. Over the last 0.5 Myrs, the piedmont deeply incised and aggraded many times per 100 kyr. Aggradation is driven by an increased flux of glacial sediment accumulated in the high range and flushed onto the piedmont by greater water discharge at stadialinterstadial transitions. After this sediment is evacuated from the high range, the reduced input sediment flux results in fluvial incision of the piedmont as fast as 9 cm/yr and to depths up to 330 m. The timing of incision onset is different in each river and does not directly reflect climate forcing but the necessary time for the evacuation of glacial sediment from the high range. A significant fraction of sediments evacuated from the high range is temporarily stored on the piedmont before a later incision Accepted ArticleThis article is protected by copyright. All rights reserved.phase delivers it to the basin. Coarse sediments arrive in the basin with a lag of at least 7 to 14 kyrs between the first evacuation from the mountain and later basinward transport. The modern output flux of coarse sediments from the piedmont contains a significant amount of recycled material that was deposited on the piedmont as early as the Middle Pleistocene. Variations in temperature and moisture delivered by the Westerlies are the likely cause of repeated aggradation-incision cycles in the north piedmont instead of monsoonal precipitation. The arrival of the gravel front into the proximal basin is delayed relative to the fine-grained load and both are separated by a hiatus. This work shows, based on field observations and data, how sedimentary systems respond to climatic perturbations, and how sediment recycling and mixing can ensue.

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Section: Pleistocene Climate and Aggradation–incision Cyclesmentioning

confidence: 97%

Lag and mixing during sediment transfer across the Tian Shan piedmont caused by climate‐driven aggradation–incision cycles

et al. 2017

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“…2; this study). (B) Tian Shan (Stroeven et al, 2013), (C) Tangula Shan (Morén et al, 2011), (D) Bayan Har Shan (Heyman et al, 2008), and (E) Shaluli Shan (Fu et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Glacial geomorphology of the Altai and Western Sayan Mountains, Central Asia

et al. 2014

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“…Xu and Yi (2014) summarized chronologies of the LIA moraines on the Tibetan Plateau (TP) and surrounding mountains, including the Tian Shan, and noted that most glaciers in the northwestern TP advanced to their LIA maximum earlier than in the southern TP in the fourteenth century. Although LIA glacial events have been constrained at these individual sites, the spatial pattern of the LIA glacial extents is still lacking, especially in the eastern Tian Shan that was not fully included in the previous mapping (Stroeven et al, 2013). In combination with previous knowledge of the dated LIA extents, this map would be useful in studying glacier dynamics and examining spatial characteristics of past ice extents at a centennial time scale.…”

Section: Introductionmentioning

confidence: 97%

“…With the advance of remote sensing technology, geomorphological mapping was also provided in conjunction with these sitespecific glacial investigations. Stroeven, Hättestrand, Heyman, Kleman, and Morén (2013) presented a regional map of glacial geomorphology across the Tian Shan. This map includes various glacial landforms and a series of marginal moraines to indicate the extents of multiple glacial stages.…”

Section: Introductionmentioning

confidence: 99%

Presumed Little Ice Age glacial extent in the eastern Tian Shan, China

Chen

et al. 2016

Journal of Maps

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Mountain glaciers across the Tian Shan provide critical freshwater resources for the arid and semi-arid areas in Central Asia. Glacial extent during the Little Ice Age (LIA) has been investigated in individual valleys, but its spatial characteristic across a large region still remains unclear. We delineated the presumed maximum LIA glacial extents in three study regions of the eastern Tian Shan (the Boro-Eren, the Bogeda, and the Barkol-Karlik ranges) using Google Earth and the 30 m Shuttle Radar Topography Mission digital elevation model. The corresponding contemporary glaciers were extracted from the Second Glacier Inventory Dataset of China. The total area of 865 contemporary glaciers was estimated to cover 791.6 km 2 during a LIA Maximum and decreased to 484.6 km 2 around 2006-2010, with a relative area loss of 38.8%. The spatial pattern of glacier area loss exhibits a west-east decreasing trend between these three regions. This map provides a data set to investigate the pattern of LIA glacial extents and assess climate impact on water resources in the eastern Tian Shan at a centennial time scale.ARTICLE HISTORY

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Glacial geomorphology of the Tian Shan

Cited by 42 publications

References 23 publications

Lag and mixing during sediment transfer across the Tian Shan piedmont caused by climate‐driven aggradation–incision cycles

Lag and mixing during sediment transfer across the Tian Shan piedmont caused by climate‐driven aggradation–incision cycles

Glacial geomorphology of the Altai and Western Sayan Mountains, Central Asia

Presumed Little Ice Age glacial extent in the eastern Tian Shan, China

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