Journal ArticleDOI
Long-term glacier melt fluctuations over the past 2500 yr in monsoonal High Asia revealed by radiocarbon-dated lacustrine pollen concentrates
Ji-Feng Zhang,Baiqing Xu,Falko Turner,Falko Turner,Liping Zhou,Pan Gao,Xinmiao Lü,Atle Nesje +7 more
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TLDR
In this article, the offset between the calibrated pollen 14 C ages and the sediment depositional age was defined as the "old pollen effect" (OPE) and used as a new indicator of glacier melt intensity and its fluctuations.Abstract:
Long-term records of glacier mass changes are important for improving our understanding of glacier dynamics and for predicting the response of glaciers to future climate change. In contrast to moraine sequences that only record isolated stages of glacier status, proglacial lake sediments may record long-term continuous glacier activities. The melt of old glacier ice releases old pollen that may affect the radiocarbon ages of pollen in proglacial lake sediments. We define the offset between the calibrated pollen 14 C ages and the sediment depositional age as the “old pollen effect” (OPE). In small catchments dominated by glaciers, the OPE may record variations in glacier melt intensity and extent, even though complex processes (e.g., modern pollen flux to a glacier or a proglacial lake, glacier flow velocities) may also impact the OPE. Using the sediments of a small proglacial lake on the southern Tibetan Plateau, we found that over the past 2.5 k.y., a weakened OPE occurred during three historical cool periods that coincided with regional glacier advances defined by moraine ages. Thus, we interpret the OPE as a new indicator of glacier melt intensity and its fluctuations. Our reconstructed glacier variability agrees well with glacier fluctuations in the European Alps and the global average temperature record, suggesting that hemispheric-scale temperature variations and/or mid-latitude Westerlies may have controlled the late Holocene glacier variability in monsoonal High Asia. We also show that the 20 th century glacier melt intensity has exceeded that of two historical warm periods and is unprecedented over the past 2.5 k.y. This implies that current anthropogenic warming poses a serious threat to the survival of glaciers in monsoonal High Asia.read more
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Different glacier status with atmospheric circulations in Tibetan Plateau and surroundings
TL;DR: This paper found that the most intensive glacier shrinkage is in the Himalayan region, whereas glacial retreat in the Pamir Plateau region is less apparent, due to changes in atmospheric circulations and precipitation patterns.
Journal ArticleDOI
Climate change, vegetation history, and landscape responses on the Tibetan Plateau during the Holocene: A comprehensive review
Fahu Chen,Jifeng Zhang,Jianbao Liu,Xianyong Cao,Juzhi Hou,Liping Zhu,Xiangke Xu,Xiangjun Liu,Mingda Wang,Duo Wu,Lingxin Huang,Tian Zeng,Shuai Zhang,Wei Huang,Xu Zhang,Kun Yang +15 more
TL;DR: In this paper, the authors review the evidence for changes in climate (temperature, precipitation/moisture), vegetation and landscape attributes (glacier and eolian activity) on the Tibetan Plateau during the Holocene.
Journal ArticleDOI
Holocene lake-level fluctuations of Selin Co on the central Tibetan plateau: Regulated by monsoonal precipitation or meltwater?
TL;DR: In this article, the authors investigated a series of water level-related depositional profiles around the Selin Co basin from the central TP, by dating 28 samples using K-feldspar luminescence techniques.
Journal ArticleDOI
Mineralogy and carbonate geochemistry of the Dali Lake sediments: Implications for paleohydrological changes in the East Asian summer monsoon margin during the Holocene
Jiawei Fan,Jule Xiao,Ruilin Wen,Shengrui Zhang,Yun Huang,Jiaojiao Yue,Xu Wang,Linlin Cui,He Li,Dingshuai Xue,Yanhong Liu +10 more
TL;DR: In this article, the authors investigated the patterns and mechanisms of Holocene hydrological and climatic changes in the modern northern margin of the East Asian summer monsoon (EASM).
Journal ArticleDOI
Revisiting growth and decline of late Quaternary mega-lakes across the south-central Tibetan Plateau
Tara N. Jonell,Jonathan C. Aitchison,Guoqiang Li,James Shulmeister,James Shulmeister,Renjie Zhou,Haixia Zhang +6 more
TL;DR: In this article, the authors present optically stimulated luminescence (OSL) and the first K-feldspar post-infrared infrared (pIRIR) stimulated luminance ages for Zabuye Caka and Dawa Tso and test if these lakes were once part of a singular Pleistocene mega-lake established across four N−S rift systems.
References
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IntCal13 and Marine13 radiocarbon age calibration curves 0-50,000 years cal BP
Paula J. Reimer,Edouard Bard,Alex Bayliss,J. Warren Beck,Paula G Blackwell,Christopher Bronk Ramsey,Caitlin E. Buck,Hai Cheng,R. Lawrence Edwards,Michael Friedrich,Pieter Meiert Grootes,Thomas P. Guilderson,Haflidi Haflidason,Irka Hajdas,Christine Hatté,Timothy J Heaton,Dirk L. Hoffmann,Alan G. Hogg,Konrad A Hughen,K Felix Kaiser,Bernd Kromer,Sturt W. Manning,Mu Niu,Ron W Reimer,David Richards,E. Marian Scott,John Southon,Richard A. Staff,Christian Turney,Johannes van der Plicht +29 more
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Journal ArticleDOI
Different glacier status with atmospheric circulations in Tibetan Plateau and surroundings
Tandong Yao,Lonnie G. Thompson,Lonnie G. Thompson,Wei Yang,Wusheng Yu,Yang Gao,Xuejun Guo,Xiaoxin Yang,Keqin Duan,Huabiao Zhao,Baiqing Xu,Jiancheng Pu,Anxin Lu,Yang Xiang,Dambaru Ballab Kattel,Daniel R. Joswiak +15 more
TL;DR: This paper found that the most intensive glacier shrinkage is in the Himalayan region, whereas glacial retreat in the Pamir Plateau region is less apparent, due to changes in atmospheric circulations and precipitation patterns.
Different glacier status with atmospheric circulations in Tibetan Plateau and surroundings
TL;DR: This paper found that the most intensive glacier shrinkage is in the Himalayan region, whereas glacial retreat in the Pamir Plateau region is less apparent, due to changes in atmospheric circulations and precipitation patterns.