A chronology of the PY608E-PC sediment core (Lake Pumoyum Co, southern Tibetan Plateau) based on radiocarbon dating of total organic carbon

Takahiro Watanabe, Toshio Nakamura, Tetsuya Matsunaka, Fumiko Watanabe Nara, Liping Zhu, Junbo Wang, Takeshi Kakegawa, Mitsugu Nishimura

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Paleoclimatic records from the Tibetan Plateau provide important clues for understanding the Asian monsoon and Asian climate systems. To reconstruct climatic and environmental changes in the southern Tibetan Plateau, a 3.77-m-long sediment core (PY608E-PC) was taken from the southeastern part of Lake Pumoyum Co in August 2006. Because terrestrial plant residues are extremely rare in this core, we performed radiocarbon dating on the total organic carbon fraction. We also estimated the old carbon effect and radiocarbon reservoir age of the total organic carbon fraction. Using these estimates, we propose a new radiocarbon chronology for past climatic changes from ca. 12,500 to 700 cal BP. The linear sedimentation rate of the core was founded to be constant at 32.0 cm/kyr, indicating stable sedimentation conditions in Lake Pumoyum Co from the period of the Younger Dryas to the Holocene.

Original languageEnglish
Pages (from-to)520-523
Number of pages4
JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume294
DOIs
Publication statusPublished - 2013 Jan

Keywords

  • AMS
  • C
  • Climate change
  • Lake Pumoyum Co
  • Lake sediment
  • Old carbon effect
  • Tibetan Plateau

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

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