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- W3048687635 abstract "The Inner Mongolian deserts north of the Tibetan Plateau and northwest of the Loess Plateau are well suited for reconstructing past climatic and environmental changes. The terminal lakes, Baijian Hu (Tengger Desert) and Gaxun Nur/Sogu Nur (Badain Jaran Desert), at the outer edges of the endorheic drainage systems have been investigated using lake sediments, microfossils and lake hydrology. In both areas, lake-level changes are documented by a series of paleoshorelines, which reflect highest lake levels during isotope stage 3 between 39 and 21 ka, reflecting an increased water supply from the surrounding mountain ranges and higher local rainfall induced by the westerlies. The area contains more than 50,000 km2 of freshwater lakes and swamps with no phases of desiccation. During isotope stage 2 (c. 18 to 13 ka), the lakes dried up and eolian activity increased rapidly. Induced by an enhanced summer monsoon, the recurrence of wet conditions after 13,000 yr BP is documented by rising lake levels, the deposition of limnic sediments and the appearance of bio-indicators. A brief return to dry and cold conditions during the Younger Dryas event has not yet been detectable. In both areas, warm and semihumid conditions during the Holocene climatic optimum are inferred from stratified, mollusc-bearing lake deposits and peat layers alternating with fluvial and eolian deposits which indicate a long-term oscillating trend toward arid conditions. Dry intervals between 6500 and 5500 and after 3000 14C yr BP are documented by the sedimentary structures, geochemical composition of the lake sediments, and the decrease of ostracods. The youngest lake phase occurred about 2000 14C yr BP, followed by complete desiccation and dune formation." @default.
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- W3048687635 date "2020-08-26" @default.
- W3048687635 modified "2023-10-12" @default.
- W3048687635 title "Climatic and environmental changes in the deserts of Inner Mongolia, China, since the Late Pleistocene" @default.
- W3048687635 doi "https://doi.org/10.1201/9781003077862-39" @default.
- W3048687635 hasPublicationYear "2020" @default.
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