Asynchronous glaciations in arid continental climate

Batbaatar, Jigjidsurengiin; Gillespie, Alan R.; Fink, David; Matmon, Ari; Fujioka, Toshiyuki

doi:10.1016/j.quascirev.2017.12.001

Cited by 46 publications

(71 citation statements)

References 46 publications

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“… 2 Total uncertainty is propagated considering 1σ of the group and the average of 1σ external uncertainties of ages in the group (Batbaatar et al . ). …”

Section: Discussionmentioning

confidence: 97%

“…Together, these data suggest Mongolian glaciers fluctuated asynchronously during the last glacial cycle (Batbaatar et al . ). Acknowledging that the glacial record remains incomplete, our results constitute an important contribution to our understanding of this apparent variability in the timing and magnitude of glacier fluctuations.…”

Section: Discussionmentioning

confidence: 97%

“…We calculated total uncertainties of the mean age for each moraine group using two methods: (i) propagating the 1σ standard deviation of the group and average of 1σ external uncertainties of individual ages within the group (Batbaatar et al . ), and (ii) propagating the 1σ standard deviation of the group and individual external uncertainties. We used the same method (i) as a previous study (Batbaatar et al .…”

Section: Methodsmentioning

confidence: 99%

“…We used the same method (i) as a previous study (Batbaatar et al . ), which presented a compilation of 10 Be moraine data across Mongolia.…”

Section: Methodsmentioning

confidence: 99%

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Late Quaternary glacial history of Khentey Mountains, Central Mongolia

Khandsuren

Seong

et al. 2019

Boreas

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Mongolian glaciers have been the subject of relatively little research, resulting in less geochronological constraint than other parts of Central Asia. The Khentey Mountains (latitude 47–51°N, longitude 105–112°E) are a typical landlocked mountain range exhibiting clear geomorphic evidence of late Quaternary glaciation. Yet, compared to western parts of Mongolia such as the Mongolian Altay, Gobi Altay, Khangay, and Khovsgol, glacial history of the Khentey Mountains is poorly understood. To address this, and permit comparison of the Khentey glacier–climate record with other alpine regions in Mongolia, we performed geomorphological mapping and cosmogenic 10Be surface‐exposure dating in two glaciated regions of the Khentey Mountains: Yestii and Khagiin Khar. Specifically, we measured 10Be in 34 samples collected from five moraine sequences, which, together with morphostratigraphy, correspond to four main glacial stages: (i) The My1 terminal moraine sequence for Yestii (21.0±4.9 ka) and the Mk1 moraine for Khagiin Khar (19.6±2.6 ka), both of which represent the Last Glacial Maximum; (ii) the Lateglacial Mk2 moraine, dated to 16.0±3.5 ka; (iii) the Mk3 moraine, dated to either 17.6±7.0 ka (Lateglacial) or 12.1±1.1 ka (Younger Dryas); and (iv) the currently undated Mk4 moraine (~2200 m a.s.l.), to which we assign a Holocene age. Our results suggest that the timing of maximum glacier extent in Mongolia was regionally variable. In the Khentey Mountains, maximum glaciation occurred during Marine Isotope Stage (MIS) 2, whereas the maximum occurred during MIS 3 in Khangay and Khovsgol and during MIS 4 in the Altay. The MIS 2 glacial maximum in the Khentey Mountains coincided with the global sea level minimum during the Last Glacial Maximum, and was followed by at least three glacial re‐advances during the Lateglacial to possibly the Holocene.

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“… 2 Total uncertainty is propagated considering 1σ of the group and the average of 1σ external uncertainties of ages in the group (Batbaatar et al . ). …”

Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 97%

Section: Methodsmentioning

confidence: 99%

“…We used the same method (i) as a previous study (Batbaatar et al . ), which presented a compilation of 10 Be moraine data across Mongolia.…”

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Late Quaternary glacial history of Khentey Mountains, Central Mongolia

Khandsuren

Seong

et al. 2019

Boreas

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“…This reflects the location of Charquini Sur in an outer-tropical highmountain environment. Such long-term preservation is seen in other arid mountain regions outside of South America, such as in Mongolia, Central Asia, where well-defined inset recessional moraine ridges of Last Glacial Maximum (LGM) and pre-LGM age are found in a number of glaciated valleys (Batbaatar et al, 2018). The overall paucity of available water in the landscape means that surficial freeze-thaw cycles, although frequent, are an inefficient weathering mechanism (Francou and Bertran, 1997;Francou et al, 2001).…”

Section: Zonation Within the Landsystemmentioning

confidence: 99%

The glacial landsystem of a tropical glacier: Charquini Sur, Bolivian Andes

Lovell

Ewertowski

Górski

et al. 2018

Earth Surf Processes Landf

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The geomorphological signature of tropical glaciers has the potential to provide important information on the response of ice masses in high‐mountain environments to climate warming. This study investigates the glacial geomorphology of Charquini Sur, Bolivia. Detailed geomorphological mapping was conducted both in the field and from satellite imagery in order to produce a 1:4000 scale geomorphological map of the glacier foreland. Sedimentological analyses (description of physical characteristics, clast shape and roundness, particle‐size distribution) provided additional insight into the landform–sediment assemblage. Glacial landforms are well preserved and include up to 11 moraine ridge suites, seven of which are cross‐valley frontal moraine arcs. These can be linked to an existing lichenometric chronology from previous work and record glacier recession since the local Little Ice Age (LIA) maximum in the late‐1600s. Lateral moraine ridges also record continuous thinning of the glacier over this time period. Smaller groups of parallel ridges are interpreted as annual moraines formed during recession. Intermorainic areas consist of flutings and a typically thin sediment cover of subglacial, supraglacial and glaciofluvial origin, with prominent ice‐moulded bedrock protuberances in places. Analysis of the landform–sediment assemblage provides an insight into the main controls on landform genesis in the basin and implies there have been temporal changes in ice‐marginal dynamics since the LIA. We present the first landsystem model for a tropical cirque glacier, documenting its behaviour since the LIA and providing an indication of glacier response in rapidly‐warming high‐mountain environments. Copyright © 2018 John Wiley & Sons, Ltd.

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