Кл.слова (ненормированные):
Holocene -- paleocarpology -- geochronology -- speciation of paleolandscapes -- climate
Аннотация: On the basis of geochronological and palynological materials, 25 sections of Holocene deposits and soils of northern Central Siberia were studied by paleocarpological methods. Special attention was given to the reconstruction of the dynamics of speciation of forest cover in time and space. As a result, climatic and ecological settings have been dynamically portrayed for each kind of landscape, and quantitative parameters of paleoclimates have been calculated. The main peaks of climatic changes of the postglacial history have been detected in the ranges 8.5-8.0 ka (thermal maximum) and 2.5-2.0 ka (thermal minimum). Importantly, the thermal maximum is characterized by warming up by 3-9degreesC in winter and by 2-6degreesC in summer. The anomaly in moisture content was insignificant. In the Middle Holocene (6.5-5.0 ka), the positive temperature trend was kept, but it was accompanied by a nearly double increase in annual atmospheric wetting. During the Late Holocene cooling (2.5-2.0 ka), the negative temperature trend led to the degradation of forest vegetation which at that time remained only in the extreme south of the territory.
WOS
Держатели документа:
Russian Acad Sci, Inst Forestry, Krasnoyarsk 660036, Russia
Krasnoyarsk State Teachers Univ, Krasnoyarsk 660049, Russia
Доп.точки доступа:
Koshkarova, V.L.; Koshkarov, A.D.