Article: Timing and climatic drivers for the MIS 6 glaciation in the central Himalaya: 10Be surface exposure dating of hummocky moraine northwest of Mt. Gang Benchhen, Paiku Gangri
Palaeogeography, palaeoclimatology, palaeoecology. 2022 Nov. 01, v. 605
2022
Abstract: ... controls. Here, we present a ¹⁰Be surface-exposure chronology northwest of Mt. Gang Benchhen, Paiku Gangri ...
| Abstract | Quantifying the timing and extent of Quaternary mountain glaciations can help us in understanding the cause of ice-age cycles. As such, impressive achievements have been made in glacial dynamics across many mountain ranges around the world, such as the Himalayas. Yet, the Marine Isotope Stage 6 (MIS 6) glacial histories have not been well determined across the Himalayan regions due to a lack of adequate chronological controls. Here, we present a ¹⁰Be surface-exposure chronology northwest of Mt. Gang Benchhen, Paiku Gangri. Twelve ¹⁰Be exposure-ages show that the outermost hummocky moraine outside of the Laqu Valley was formed around ∼165.7 ka, reflecting the MIS 6 glacial maximum in the central Himalaya. The minimum age constraint is consistent with the low atmospheric CO₂ levels as well as low summer solar insolation intensity at northern high-latitude, which indicate that glaciers in the Laqu Valley culminated during cold climate condition. Also, we identified a potential correlation between the MIS 6 glacial advance in the central Himalaya and Heinrich-like event. We thus hypothesize that there seems to be a response of Himalayan glaciers to the combined forcing of the boreal summer solar insolation intensities, atmospheric CO₂ concentrations, and North Atlantic climate oscillations during the MIS 6 glaciation. |
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| Keywords | carbon dioxide ; climatic factors ; cold zones ; glaciation ; latitude ; palaeogeography ; paleoclimatology ; paleoecology ; solar radiation ; summer ; Himalayan region |
| Language | English |
| Dates of publication | 2022-1101 |
| Publishing place | Elsevier B.V. |
| Document type | Article |
| ZDB-ID | 417718-6 |
| ISSN | 0031-0182 |
| ISSN | 0031-0182 |
| DOI | 10.1016/j.palaeo.2022.111230 |
| Database | NAL-Catalogue (AGRICOLA) |
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