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Middle and Late-Holocene coastal environments of far Southeastern Russia as inferred from palynological and diatom data

Journal Article · · Holocene
 [1];  [2];  [3];  [4];  [5];  [1];  [1]
  1. Russian Academy of Sciences (RAS), Magadan (Russian Federation). North-East Interdisciplinary Scientific Research Institute (NEISRI)
  2. Russian Academy of Sciences (RAS), Vladivostok (Russian Federation). Federal Scientific Center of the East Asia Terrestrial Biodiversity
  3. Russian Academy of Sciences (RAS), Vladivostok (Russian Federation). Pacific Geographical Institute
  4. Univ. of Washington, Seattle, WA (United States)
  5. Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Existing discontinuous palynological records from coastal and river valley exposures, with varying quality of radiocarbon control, suggested that the regional Holocene climate in southern areas of the Russian Far East was characterized by as many as 10 fluctuations in temperature and/or precipitation. In this study, palynological data from Zerkalnoye Lake, located on the western coast of the Sea of Japan, indicate a gradual decline in temperature through the Middle and Late-Holocene with a Holocene thermal maximum between 8800 and 5500 cal yr BP. Three wetter than present intervals, marked by an increase in Pinus koraiensis, occurred c. 3600–3500 cal yr BP, 2340–2050 cal yr BP, and 1830–1800 cal yr BP. The Zerkalnoye record shows the dominance of Quercus-broadleaf forests during the Middle and Early Holocene, although Quercus shows a gradual decrease as climate cooled during this interval. Diatom analysis of the Zerkalnoye sediments documents that the site was a shallow bay or coastal lagoon until c. 3540 cal yr BP. After that time, a freshwater lake was established, which had variable marine influences probably caused by sea level changes following deglaciation. The diatom data indicate a cool water interval between 2900 and 2580 cal yr BP, also noted in other sites in the region. Changes in the basin’s depositional environment do not affect the palynological record, indicating such sites can provide reliable paleovegetational and paleoclimatic records. In conclusion, the discrepancies of the various regional paleoclimatic scenarios indicate the need for the further collection of continuous records from coastal to alpine zones in this region of northeastern Asia.
Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
3020638
Report Number(s):
LLNL--JRNL-2016288
Journal Information:
Holocene, Journal Name: Holocene Journal Issue: 2 Vol. 36; ISSN 0959-6836; ISSN 1477-0911
Publisher:
SAGECopyright Statement
Country of Publication:
United States
Language:
English

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