The quaternary glacial history of the Lahul Himalaya, northern India

Owen, Lewis A.; Derbyshire, Edward; Richardson, Shaun; Benn, Doug; Evans, David J. A.; Mitchell, W. A.

doi:10.1002/(sici)1099-1417(199601/02)11:1<25::aid-jqs209>3.3.co;2-b

Cited by 7 publications

(12 citation statements)

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“…and 3000 m a.s.l., respectively, and the dashed lines airflow at about 600 m a.s.l. (C) and (D) show the strong N-E and E-W precipitation gradients (adapted fromOwen et al 1998 and.…”

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confidence: 99%

Late Quaternary glaciation of Tibet and the bordering mountains: a review

Lehmkuhl

Owen

2008

Boreas

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2005 (May): Late Quaternary glaciation of Tibet and the bordering mountains: a review. Boreas, Vol. 34, pp. 87-100. Oslo. ISSN 0300-9483.Abundant glacial geologic evidence present throughout Tibet and the bordering mountains shows that glaciers have oscillated many times throughout the late Quaternary. Yet the timing and extent of glacial advances is still highly debated. Recent studies, however, suggest that glaciation was most extensive prior to the last glacial cycle. Furthermore, these studies show that in many regions of Tibet and the Himalaya glaciation was generally more extensive during the earlier part of the last glacial cycle and was limited in extent during the global Last Glacial Maximum (marine oxygen isotope stage 2). Holocene glacial advances were also limited in extent, with glaciers advancing just a few kilometers from their present ice margins. In the monsoon-influenced regions, glaciation appears to be strongly controlled by changes in insolation that govern the geographical extent of the monsoon and consequently precipitation distribution. Monsoonal precipitation distribution strongly influences glacier mass balances, allowing glaciers in high altitude regions to advance during times of increased precipitation, which are associated with insolation maxima during glacial times. Furthermore, there are strong topographic controls on glaciation, particular in regions where there are rainshadow effects. It is likely that glaciers, influenced by the different climatic systems, behaved differently at different times. However, more detailed geomorphic and geochronological studies are needed to fully explore regional variations. Changes in glacial ice volume in Tibet and the bordering mountains were relatively small after the global LGM as compared to the Northern Hemisphere ice sheets. It is therefore unlikely that meltwater draining from Tibet and the bordering mountains during the Lateglacial and early Holocene would have been sufficient to affect oceanic circulation. However, changes in surface albedo may have influenced the dynamics of monsoonal systems and this may have important implications for global climate change. Drainage development, including lake level changes on the Tibetan plateau and adjacent regions has been strongly controlled by climatic oscillations on centennial, decadal and especially millennial timescales. Since the Little Ice Age, and particularly during this century, glaciers have been progressively retreating. This pattern is likely to continue throughout the 21st century, exacerbated by human-induced global warming.

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“…and 3000 m a.s.l., respectively, and the dashed lines airflow at about 600 m a.s.l. (C) and (D) show the strong N-E and E-W precipitation gradients (adapted fromOwen et al 1998 and.…”

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confidence: 99%

Late Quaternary glaciation of Tibet and the bordering mountains: a review

Lehmkuhl

Owen

2008

Boreas

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“…Identify glacial stages in the Tons River basin (this study) and compared with glacial advancement in the adjacent area of the Himalaya (data from (1) Taylor and Mitchell (2000), (2) Dortch et al (2013), (3) Nagar et al (2013), (4,5) Owen et al (1996Owen et al ( , 2006, (6) Scherler et al (2010), (7) Present study, (8) Sharma and Owen (1996), (9) Barnard et al (2004), (10) (14) Finkel et al (2003)). Dark black line indicates the mountain ranges, and colour bar represents glacial advancements of the same period.…”

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confidence: 94%

“…This adds to the debate on whether the glacial advance in the monsoon dominated Himalaya was at its maximum during MIS3/4 or MIS 2. Owen et al (1996) opined that glaciers in the monsoon dominated Himalaya advanced to lowest altitudes during MIS3/4 because this was the time when monsoon was relatively stronger (as compared with LGM) and surface atmospheric temperatures were lower. Another school (e.g.…”

Section: Response Of Tons Valley Glaciation To Lgm and Holocene Climamentioning

confidence: 99%

Late Quaternary glacial advances in the Tons River Valley, Garhwal Himalaya, India and regional synchronicity

et al. 2014

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The glacial history of the Tons River Valley reveals significant changes in the glacier extent during the late Quaternary driven by regional and global climatic changes. The successions of moraines in glaciated valley of the upper Tons River, Garhwal Himalaya, provide evidence of at least five glacial advances during the late Quaternary Period. This study discusses about the synchronicity of Himalayan glaciers and comparison between results of Optically Stimulated Luminescence (OSL) and Cosmogenic Radio Nuclide (CRN 10 Be) dates. The OSL dates of moraine sediments deposited by glacier in the upper Tons valley show parallelism with the ages deduced from the CRN of 10 Be by Scherler et al. in the same area. The five episodes of glacier advances are dated at 20 ± 3, 16 ± 2, 8 ± 1.2, 6 ± 0.7 and 3 ± 0.6 kyr (between Marine Isotope Stages (MISs) I and II). Two of the more extensive phases of glaciation were during the early and later parts of MIS II, which attributed to the lower temperature and enhanced the mid-latitude westerlies. During the periods between 20 ± 3 kyr and present day, the glacier lost ~47 km 2 (33%) area, 0.88 × 10 10 m 3 water equivalent (w.e.) volume with the rate of 0.44 × 10 6 m 3 w.e./ yr, which is close to the current melting rates of Central Himalayan glaciers. The estimation of equilibrium line altitude (ELA) using these dates and geomorphic data suggests a vertical shift of ~451 m for Jaundhar Glacier and ~598 m for Bandarpunch Glacier since 20 kyr. The results from Tons valley glaciation show synchronicity with the records of glacial advancements from the other Himalayan glacier valleys. These data allow testing of two widely used dating techniques and importance of global climate change and monsoon influence on glaciation in the Himalaya.

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“…However, the extent of ice was much larger in the mountains surrounding the Tibetan Plateau and, in addition, higher lake levels indicate more humid periods even in the interior of the Tibetan Plateau (cf. Fang 1991;Shi 1992;Frenzel 1994;Pachur et al 1995;Owen et al 1997Owen et al , 1998Benn & Owen 1998;Wünnemann et al 1998;Lehmkuhl & Haselein 2000). The map of Li et al (1991) shows very limited glaciation in the interior of the Tibetan Plateau and expanded ice caps and valley glaciers on the margin of the Plateau during the LGM.…”

Section: Pleistocene Geomorphological Indications and Palaeoclimate Rmentioning

confidence: 99%

Environmental change modelling for Central and High Asia: Pleistocene, present and future scenarios

Böhner¹,

Lehmkuhl²

2008

Boreas

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2005 (May): Environmental change modelling for Central and High Asia: Pleistocene, present and future scenarios. Boreas, Vol. 34, pp. 220-231. Oslo. ISSN 0300-9483.A regional modelling concept was developed for late Quaternary climate reconstructions and future climate impact assessments. Based on estimates of different climate parameters covering the entire Central and High Asia in a grid-cell spacing of 1 km 2 , climatic determinants of the recent spatial distribution of climate-sensitive environments (glacial and periglacial environments, forest) were explored. Simple climatic threshold functions were established, defining critical climate values for modelling the spatial extension of environments considered. Using palaeogeomorphological indicators as a basis, late Quaternary climatic conditions were modelled in a Last Glacial Maximum (LGM) scenario consistent with palaeogeomorphological and palaeoclimatological data. The results enabled a validation of LGM palaeoclimate simulations performed by the ECHAM GCM. To assess the magnitude of possible future climatic impacts on the spatial distribution of glaciers, permafrost and potential forest stands, two GCM-based IPCC-SRES climate change scenarios (IPCC special report on emission scenarios) for the time period 2070-2099 were considered. Assuming future climates to be perturbed for long enough to affect the environments, a distinct loss of glaciated areas and permafrost must be expected.

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The quaternary glacial history of the Lahul Himalaya, northern India

Cited by 7 publications

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Late Quaternary glaciation of Tibet and the bordering mountains: a review

Late Quaternary glaciation of Tibet and the bordering mountains: a review

Late Quaternary glacial advances in the Tons River Valley, Garhwal Himalaya, India and regional synchronicity

Environmental change modelling for Central and High Asia: Pleistocene, present and future scenarios

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