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Climate and soil moisture content during development of the first palaeosol in the southern Loess Plateau

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doi: 10.1111/ejss.12543
Authors:Zhao, J. B.; Luo, X. Q.; Ma, Y. D.; Zhou, Q.; Chen, B. Q.; Yue, Y. L.
Author Affiliations:Primary:
Baoji University of Arts and Sciences, Shaanxi Key Laboratory of Disasters Monitoring and Mechanism Simulation, Baoji, China
Other:
Shaanxi Normal University, China
Chang'an University, China
Volume Title:European Journal of Soil Science
Source:European Journal of Soil Science, 69(3), p.462-474. Publisher: Wiley-Blackwell on behalf of the British Society of Soil Science, and the National Societies of Soil Science in Europe, Oxford, United Kingdom. ISSN: 1351-0754
Publication Date:2018
Note:In English. 30 refs.; illus., incl. 7 tables, sketch map
Summary:The scientific problems concerning Quaternary soil water content and the water cycle have not been researched. This study examined the soil water content and depth of distribution of gravitational water in the south Loess Plateau during development of the first palaeosol layer (S1) by methods such as field investigation, electron microscopy, energy spectrum analysis, chemical analysis, and so on. The purpose was to reveal the climate, water balance and vegetation type at the time when S1 developed. The depth of migration of CaCO3 and Sr were 4.2 m below the upper boundary of the S1 palaeosol, and the depth of weathered loess beneath the argillic horizon was 4.0 m. Ferri-argillans developed well in the argillic horizon and their depth of migration was 1 m below the argillic horizon. These findings suggest that the climate during the last interglacial was subtropical and humid, and the soil-water balance was positive. Gravitational water was present to a depth of least 4.2 m from the top of S1, and the water content was adequate for tree growth. The chemical weathering index showed that this palaeosol has been moderately weathered. Highlights - We studied the palaeo-water content index during development of the first palaeosol. Soil water balance during development of S1 palaeosol in the south Loess plateau was positive. Available water content was 14% during development of S1 palaeosol. We suggest that a subtropical climate and forest vegetation prevailed. Abstract Copyright (2018), British Society of Soil Science.
Subjects:Alkaline earth metals; Calcium carbonate; Cenozoic; Chemical weathering; Clastic sediments; Climate; Forests; Holocene; Horizons; Humid environment; Indicators; Interglacial environment; Loess; Metals; Micromorphology; Moisture; Paleoclimatology; Pedogenesis; Pleistocene; Quaternary; Sediments; Soil profiles; Soil-water balance; Strontium; Subtropical environment; Terrestrial environment; Upper Holocene; Vegetation; Water content; Weathering; Asia; China; Far East; Loess Plateau; Shaanxi China; Xi'an China; Argillic horizons; Ferri-argillans; Guanzhong Plain; Hejiacum China; Hejiacun China; Lantian China; Ling Tableland; Paleosols; Shaoling Tableland; Yangjiawan China; Yangwancum China
Coordinates:N340500 N342300 E1091800 E1070700
Record ID:821688-7
Copyright Information:GeoRef, Copyright 2021 American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom
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