Palaeoclimate Reconstruction of the Central Gangdise Mountains, Southern Tibetan Plateau, Based on Glacier Modelling

Zihan Jiang, Qian Zhang (), Hanyue Xu, Ninglian Wang, Li Zhang and Domenico Capolongo
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Zihan Jiang: College of Geography and Environment, Shandong Normal University, Jinan 250358, China
Qian Zhang: College of Geography and Environment, Shandong Normal University, Jinan 250358, China
Hanyue Xu: College of Geography and Environment, Shandong Normal University, Jinan 250358, China
Ninglian Wang: College of Urban and Environmental Sciences, Northwest University, Xi’an 710127, China
Li Zhang: State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710061, China
Domenico Capolongo: Dipartimento di Scienze della Terra e Geoambientali, Università degli Studi di Bari Aldo Moro, 70125 Bari, Italy

Land, 2022, vol. 11, issue 8, 1-13

Abstract: Palaeoglacier modelling is an important approach for reconstructing the palaeoclimate. The timing of glaciations in the central part of the Gangdise Mountains has been constrained previously, but the palaeoclimate remains unclear. In this paper, the palaeo-temperature and precipitation of the early marine isotope stage (MIS) 2, the Last Glacial Maximum (LGM), and the early Holocene were reconstructed using coupled mass balance and ice flow models. The results show that a series of temperature changes (Δ T ) and precipitation factors ( F p ) resulted in optimum palaeoglacial extents. The modelled palaeoglaciers during the early MIS 2, the LGM, and the early Holocene cover areas of ~18.1 km 2 , ~17.4 km 2 , and ~16.3 km 2 , respectively, with ice volumes of ~2.18 km 3 , ~1.99 km 3 , and ~1.95 km 3 , respectively. Previous studies on ice cores, pollen samples, and lake sediments were referenced to narrow the range of palaeo-temperatures and precipitations. The reconstructed temperatures during the early MIS 2, LGM, and early Holocene were constrained to 2.4–2.9 °C, 2.15–3.05 °C, and 0.95–1.5 °C lower than today, respectively. Their precipitation levels were 60–80%, 50–80%, and 100–150% of the present-day level, respectively.

Keywords: early MIS 2; LGM; early Holocene; glaciation; palaeoglacier (search for similar items in EconPapers)
JEL-codes: Q15 Q2 Q24 Q28 Q5 R14 R52 (search for similar items in EconPapers)
Date: 2022
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