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Magnetic susceptibility and grain size data during last 60kyr in Jingyuan and Gulang, China
CTR :776
Key words Magnetic susceptibility, Grain size, OSL, loess
Relevant data Sun, Y.B., S.C. Clemens, C. Morrill, X.P. Lin, X.L. Wang, and Z.S. An. 2012. Influence of Atlantic meridional overturning circulation on the East Asian winter monsoon. Nature Geoscience, Vol. 5, pp. 46-49. DOI: 10.1038/NGEO1326
Data shows that
Loess sequences at Jingyuan (36.35°N, 104.6° E, 2,210m above sea level) and Gulang (37.49°N, 102.88°E, 2,400 m above sea level) are situated in the depocentre of modern dust storms, at distances of 80 km and 10 km, respectively, from the modern Tengger Desert margin. Two 20-m sampling pits were excavated at Jingyuan and Gulang. Forty OSL ages were used to generate an independent loess chronology, indicating that the 20-m loess sequences at Jingyuan and Gulang accumulated over the past 48 and 60 kyr, respectively (Method:A sample from the Gulang pit (Depth = 5 m) was used to carry out the preheating plateau test using the SAR protocol. The natural OSL decay curve after preheating at 260°C for 10 s was decomposed into fast, medium and slow components. Fitting of the OSL decay curves was conducted using Origin 7.0 software, and a function of time (t) can be described as a sum of several well-fitted exponentials). High sedimentation rates (10-130 cm/kyr at Jingyuan and 9-63 cm/kyr at Gulang) and weak pedogenesis make these two loess sequences sensitive recorders of rapid monsoon changes.
Data collection format Excel
Data classification Geological record - Terrestrial environmental records
Data source
World Data Center for Paleoclimatology, Boulder and NOAA Paleoclimatology Program
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WangHL Email: wanghl@ieecas.cn
Unit: wanghl@ieecas.cn Phone: 029-62336215
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