Klimaticheskaya izmenchivost' v epokhu MIS-11 (370-440 tys let nazad) po dannym izotopnogo sostava (δD, δ18O, δ17O) ledyanogo kerna Stantsii Vostok  [Climate change during the MIS-11 stage (370-440 ka BP) according to isotope composition (δ, δ18O, δ17O) of ice cores from the Vostok Station]

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doi: 10.15356/2076-6734-2018-2-149-158
Alternate Title(s): Climate change during the MIS-11 stage (370-440 ka BP) according to isotope composition (δ, δ18O, δ17O) of ice cores from the Vostok Station
Author(s): Veres, A. N.; Yekaykin, A. A.; Vladimirova, D. O.; Kozachek, A. V.; Lipenkov, V. Ya.; Skakun, A. A.
Author Affiliation(s): Primary:
Arctic and Antarctic Research Institute, Saint Petersburg, Russian Federation
Other:
Saint Petersburg State University, Russian Federation
University of Copenhagen, Denmark
Russian Academy of Sciences, Pulkovo Astronomic Observatory, Russian Federation
Volume Title: Led i Sneg Ice and Snow
Source: Led i Sneg = Ice and Snow, 58(2), p.149-158. Publisher: Russian Academy of Sciences, Institute of Geography, Association of Glaciological Studies, Moscow, Russian Federation. ISSN: 2076-6734
Note: In Russian with English summary. 24 refs.; illus.
Summary: The results of detailed isotopic studies of ice core samples from the Vostok station (East Antarctica) related to the MIS-11 era (the 11th sea isotope stage, i.e. 370-440 thousand years ago) are presented. Reconstruction of paleoclimatic conditions in this period of time was performed using the method of interpretation of the results of isotopic studies of ice, developed by the authors of the article, which is based on the joint analysis of three independent parameters: δD, d-excess, 17O-excess. The isotopic composition (δD) and the deuterium excess depend on the following three meteorological parameters--the condensation temperature near the Vostok station, relative humidity, and the sea surface temperature at the source of moisture, whereas 17O-excess depends only on the first two parameters. Accordingly, the proposed method of interpretation allows reconstructing the paleoclimatic conditions (the condensation temperature and surface air temperature at the Vostok station; sea surface temperature and relative humidity above the ocean) in two different regions in past epochs. For the first time, data on minor fluctuations in the relative humidity of the air in the moisture source throughout the MIS-11 era were obtained. The data resulted from the interpretation demonstrated that the relative humidity fluctuated within the measurement error of ±5%. Reconstructed climatic conditions in the era of MIS-11 were compared with published data for stations Vostok and Concordia, as well as with the marine core data from 94-607 DSDP and ODP 177-1090. The results obtained on the basis of isotopic analysis of ice cores from stations Vostok and Concordia indicated that in the optimum MIS-11 the air temperature was 4°C higher, and in the Termination V-8°C lower than the present-day values. The similarity of data between the marine columns DSDP 94-607 (North Atlantic), ODP 177-1090 (South Ocean) and our results points to the global nature of changes in the sea surface temperature during the MIS-11 era. The coordination of the above results proves the high quality of the methods developed by the authors for measuring and interpreting the isotope composition of ice.
Year of Publication: 2018
Research Program: DSDP Deep Sea Drilling Project
IPOD International Phase of Ocean Drilling
ODP Ocean Drilling Program
Key Words: 02 Geochemistry; 24 Surficial Geology, Quaternary Geology; Antarctic ice sheet; Antarctica; Atlantic Ocean; Campeche Scarp; Cenozoic; Climate change; D/H; DSDP Site 177; DSDP Site 607; DSDP Site 94; Deep Sea Drilling Project; East Antarctic ice sheet; East Antarctica; East Pacific; Gulf of Mexico; Holocene; Humidity; Hydrogen; IPOD; Ice; Ice cores; Isotope ratios; Isotopes; Leg 10; Leg 177; Leg 18; Leg 94; Marine isotope stages; Mid-Atlantic Ridge; North Atlantic; North Pacific; Northeast Atlantic; Northeast Pacific; O-17/O-16; O-18/O-16; ODP Site 1090; Ocean Drilling Program; Oxygen; Pacific Ocean; Paleoclimatology; Quaternary; Sea-surface temperature; South Atlantic; Stable isotopes; Upper Holocene; Vostok Station
Coordinates: S782800 S782800 E1064800 E1064800
Record ID: 2019003247
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute.