Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8915008 | Quaternary Science Reviews | 2018 | 22 Pages |
Abstract
The study presents the Late Quaternary glaciation history of monsoon-dominated Dokriani Glacier valley, Dingad basin, central Himalaya, India. The basin is tested for the mechanism of landforms preservation in high relief and abundant precipitation regimes of the Higher Himalaya. Field geomorphology and remote sensing data, supported by Optical Stimulated Luminescence (OSL) dating enabled identification of five major glacial events of decreasing magnitude. The oldest glacial stage, Dokriani Glacial Stage I (DGS-I), extended down to â¼8 km (2883 m asl) from present-day snout (3965 m asl) followed by other four glaciations events viz. DGS-II, DGS-III, DGS-IV and DGS-V terminating at â¼3211, 3445, 3648 and â¼3733 m asl respectively. The DGS-I glaciation (â¼25-â¼22 ka BP) occurred during early Marine Isotope Stage (MIS) â2, characterized as Last Glacial Maximum (LGM) extension of the valley. Similarly, DGS-II stage (â¼14-â¼11 ka BP) represents the global cool and dry Older Dryas and Younger Dryas event glaciation. The DGS-III glaciation (â¼8 ka BP) coincides with early Holocene 8.2 ka cooling event, the DGS-IV glaciations (â¼4-3.7 ka BP) corresponds to 4.2 ka cool and drier event, DGS-V (â¼2.7-â¼1 ka BP) represents the cool and moist late Holocene glacial advancement of the valley. This study suggests that the Dokriani Glacier valley responded to the global lowering of temperature and variable precipitation conditions. This study also highlights the close correlation between the monsoon-dominated valley glaciations and Northern Hemisphere cooling events influenced by North Atlantic climate.
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Geology
Authors
Tanuj Shukla, Manish Mehta, Manoj K. Jaiswal, Pradeep Srivastava, D.P. Dobhal, H.C. Nainwal, Atul K. Singh,