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Statements

Subject Item
n2:RIV%2F61388980%3A_____%2F11%3A00365642%21RIV13-AV0-61388980
rdf:type
n4:Vysledek skos:Concept
dcterms:description
We carried out a multiparameter investigation for non-magnetic proxies of the intensity of pedogenesis in loess/paleosol sections from two different climate settings, Dolni Vestonice, central Europe, and Krasnogorskoye, southern Siberia. The work was performed in order to clarify the problem of two opposite scenarios of magnetic susceptibility (MS) patterns in these two profiles, the %22Chinese%22 model with magnetically enhanced paleosols and the %22Siberian/Alaskan%22 model with magnetically depleted paleosols. The age constraints on the Krasnogorskoye section were inferred from an independent correlation with the well-dated Dolni Vestonice section, based on MS and sediment color (CIE L*), and with the MS log from Lake Baikal. The pedologic description of the loess/paleosol sections and their correlation was considerably improved by the use of Vis spectral proxies (CIE L*, reflectance in the red band); their weathering intensity can be effectively characterized by diffuse reflectance spectroscopy (DRS) and geochemical (CEC and Rb/Sr) proxies. Whereas the MS is strongly dependent on the type of soil (chernozems vs. brown soils), the geochemical proxies, in particular CEC, proved to be relatively independent of the soil type. These parameters are less affected by region-specific conditions than the MS signal. The non-magnetic proxies indicate relatively dissimilar climatic trends at the two sites during the last glacial-interglacial cycle. A long-distance correlation, based solely on the MS signal, can be adversely affected by switching between the Chinese and the Siberian/Alaskan magnetic modes, this having been observed at the Krasnogorskoye section. In general, no single universal proxy of weathering or pedogenesis intensity would be applicable across broad regions or considerable climatic gradients. Paleoclimatologic interpretations of large regions should always be based on a carefully designed, multiproxy approach. We carried out a multiparameter investigation for non-magnetic proxies of the intensity of pedogenesis in loess/paleosol sections from two different climate settings, Dolni Vestonice, central Europe, and Krasnogorskoye, southern Siberia. The work was performed in order to clarify the problem of two opposite scenarios of magnetic susceptibility (MS) patterns in these two profiles, the %22Chinese%22 model with magnetically enhanced paleosols and the %22Siberian/Alaskan%22 model with magnetically depleted paleosols. The age constraints on the Krasnogorskoye section were inferred from an independent correlation with the well-dated Dolni Vestonice section, based on MS and sediment color (CIE L*), and with the MS log from Lake Baikal. The pedologic description of the loess/paleosol sections and their correlation was considerably improved by the use of Vis spectral proxies (CIE L*, reflectance in the red band); their weathering intensity can be effectively characterized by diffuse reflectance spectroscopy (DRS) and geochemical (CEC and Rb/Sr) proxies. Whereas the MS is strongly dependent on the type of soil (chernozems vs. brown soils), the geochemical proxies, in particular CEC, proved to be relatively independent of the soil type. These parameters are less affected by region-specific conditions than the MS signal. The non-magnetic proxies indicate relatively dissimilar climatic trends at the two sites during the last glacial-interglacial cycle. A long-distance correlation, based solely on the MS signal, can be adversely affected by switching between the Chinese and the Siberian/Alaskan magnetic modes, this having been observed at the Krasnogorskoye section. In general, no single universal proxy of weathering or pedogenesis intensity would be applicable across broad regions or considerable climatic gradients. Paleoclimatologic interpretations of large regions should always be based on a carefully designed, multiproxy approach.
dcterms:title
Non-magnetic indicators of pedogenesis related to loess magnetic enhancement and depletion: Examples from the Czech Republic and southern Siberia Non-magnetic indicators of pedogenesis related to loess magnetic enhancement and depletion: Examples from the Czech Republic and southern Siberia
skos:prefLabel
Non-magnetic indicators of pedogenesis related to loess magnetic enhancement and depletion: Examples from the Czech Republic and southern Siberia Non-magnetic indicators of pedogenesis related to loess magnetic enhancement and depletion: Examples from the Czech Republic and southern Siberia
skos:notation
RIV/61388980:_____/11:00365642!RIV13-AV0-61388980
n4:predkladatel
n13:ico%3A61388980
n3:aktivita
n9:V n9:Z n9:S
n3:aktivity
S, V, Z(AV0Z40320502)
n3:cisloPeriodika
7-8
n3:dodaniDat
n14:2013
n3:domaciTvurceVysledku
n15:4208994
n3:druhVysledku
n17:J
n3:duvernostUdaju
n19:S
n3:entitaPredkladatele
n7:predkladatel
n3:idSjednocenehoVysledku
216250
n3:idVysledku
RIV/61388980:_____/11:00365642
n3:jazykVysledku
n12:eng
n3:klicovaSlova
Pedogenesis; Sediment color; Diffuse reflectance spectroscopy; Cation exchange capacity; Magnetic susceptibility; Long-distance stratigraphic correlation
n3:klicoveSlovo
n11:Diffuse%20reflectance%20spectroscopy n11:Sediment%20color n11:Long-distance%20stratigraphic%20correlation n11:Cation%20exchange%20capacity n11:Pedogenesis n11:Magnetic%20susceptibility
n3:kodStatuVydavatele
GB - Spojené království Velké Británie a Severního Irska
n3:kontrolniKodProRIV
[00352F022428]
n3:nazevZdroje
Quaternary Science Reviews
n3:obor
n10:DD
n3:pocetDomacichTvurcuVysledku
1
n3:pocetTvurcuVysledku
3
n3:rokUplatneniVysledku
n14:2011
n3:svazekPeriodika
30
n3:tvurceVysledku
Chlachula, J. Matys Grygar, Tomáš Bábek, O.
n3:wos
000289128900016
n3:zamer
n16:AV0Z40320502
s:issn
0277-3791
s:numberOfPages
13
n18:doi
10.1016/j.quascirev.2011.01.009