Isotopic signature of Tian-Shan mountain soils as a record of climatic changes of the Late Pleistocene and Holocene

3rd International Conference Environment and Sustainable Development of Territories: Ecological Challenges of the 21st Century

生态环境科学;地球科学;经济学

Kovaleva, N.O.^1

Soil Science Faculty, Lomonosov Moscow State University, Moscow, Russia^1

关键词: 13C NMR spectrum;    Climatic changes;    Climatic fluctuations;    Glacier movement;    Isotope compositions;    Isotopic signatures;    Late Pleistocene;    Soil humic acids;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/107/1/012117/pdf
DOI  :  10.1088/1755-1315/107/1/012117

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Specific features of the polygenetic mountain soils of the Tian-Shan (Kyrgystan) are due to the action of present-day and relict soil processes that vary in age and intensity under the influence of glacier movements and climatic fluctuations. These properties can be used as indicators of paleoclimatic changes. The diagnosis of ancient pedogenesis was based on criteria with the longest response time, namely, soil morphology, characteristics of organic matter,13C-NMR spectra of soil humic acids, isotope composition of humus and carbonates, and the soil age. The results indicate a glacial climate of the Late Pleistocene, a dry and cold climate during the Early Holocene, warm and dry conditions of soil formation in the Middle Holocene, and humidity climate of the Late Holocene.