Record details

Title
    Late Quaternary Loess-palaosol succesion and atmospheric circulation, Central Siberia
Author
    Catto, N.
    Chlachula, Jiří
    Evans, T.
    Nývlt, Daniel
    Rutter, M.
Language
    anglicky
Publication type
    článek ve sborníku
Source title - monograph
    XVI INQUA Congress Programs with Abstracts
Pages
    1
Notes
    Akce: 2003 ; Reno
Thesaurus term
    Paleomagnetism, Paleoclimatology, Loess, Palaeosol, Late Quaternary, Central Siberia
Keyword
    Atmospheric
    Central
    Circulation
    Late
    Loess-palaosol
    Quaternary
    Siberia
    Succesion
Abstract (in english)
   Loess-palaeosol records in Central Siberia indicate establishment of periglacial steppe-tundra during OIS 4 and OIS 2, replaced by parkland steppe and boreal forest during warmer intervals within OIS 3. A gradual transition from parkland-steppe (OIS 5a) to moist tundra conditions (OIS 4) occurred ~75 ka BP. General cooling, punctuated by isolated short warm intervals, marked the period from ~75 to ~25 ka BP. OIS 2, ~25-18 ka BP, was marked by a sharp change to a dry tundra climate, followed by rapid warming ~15-8 ka BP. Mid- and latest Holocene conditions were warmer than those recorded during the OIS 5e maximum. Textural, magnetic susceptibility, and mineralogical analyses indicate that the OIS 4 and OIS 2 loess units were derived from different source areas. The similarity between climate successions in Siberia with those recorded in the central Russian Plain suggests that continental-scale changes in airmass circulation were ongoing during the Late Quaternary in northern Eurasia.
Contributor
    Česká geologická služba
Contributor code
    ČGS (RIV)
Source format
    R
Import date
    15. 10. 2014