High-resolution stalagmite δ 13C record of soil processes from southwestern China during the early MIS 3

Autor:	Hai Cheng, Richard Lawrence Edwards, Dian Bing Liu, Yongjin Wang
Rok vydání:	2012
Předmět:	Calcite geography Multidisciplinary geography.geographical_feature_category δ13C Earth science media_common.quotation_subject Stalagmite Natural (archaeology) chemistry.chemical_compound Pedogenesis chemistry Desertification Climatology East Asian Monsoon Carbonate General Geology media_common
Zdroj:	Chinese Science Bulletin. 58:796-802
ISSN:	1861-9541 1001-6538
DOI:	10.1007/s11434-012-5472-9
Popis:	Knowledge of the evolution of pedogenic processes in the carbonate area is important to understand the dynamics of rock desertification. A precisely-dated stalagmite δ13C record between 61.3 and 50.5 ka BP from southwestern China, potentially related to soil biogenic CO2 production, shifts within a narrow range between −9‰ and −7‰, and exhibits a prominent cycle of 350–470 a, independent of the Asian monsoon changes. This indicates that a threshold effect might control the amplitude of calcite δ13C variability, likely associated with the vertical soil loss in the carbonate area. The periodic δ13C changes reflect that the loss/recovery of soil cover can operate on centennial scale. Thus, the rock desertification in southwestern China might at least initiate 60 ka ago and should be of natural origin.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e3798a1dd124068991cd507e6c1d8c6b https://doi.org/10.1007/s11434-012-5472-9 Zobrazit plný text záznamu Full text from SpringerLink