This data is the chronological, grain size and bulk density data of loess-paleosol sequence in Wenchuan (WCH) in the eastern Tibetan Plateau. We measured the median grain size and bulk density data of the profile (10m) at intervals of 2.5cm and 5cm respectively. The OSL dating experiment was carried out in the Luminescence Dating Laboratory of the Key Laboratory of Western China’s Environmental Systems (Ministry of Education) in Lanzhou University. AMS 14C measurements were carried out at Peking University. The experimental analysis of environmental indicators was also completed at the Key Laboratory of Western China’s Environmental Systems (Ministry of Education) in Lanzhou University. The OSL ages were determined by an automated Risø TL/OSL DA-20 reader. The grain size data were measured by a Malvern Mastersizer 2000 laser diffractometer; the bulk density data were determined by the oil-soaked method. This data provides the detailed chronological data of loess-paleosol sequence and the variation characteristics of grain size and bulk density since the last glacial period in the eastern Tibetan Plateau, and provides an important data reference for understanding paleoclimate evolution and dust accumulation history in the eastern Tibetan Plateau.
This data is the chronological, magnetic, grain size and bulk density data of Zhouqu (ZQ) loess paleosol sequence in the eastern Tibetan Plateau (TP). We measured the magnetic susceptibility, grain size and bulk density data of the profile at 5 cm intervals. All the experimental analysis was completed at the Key Laboratory of Western China's Environmental Systems (Ministry of Education), Lanzhou University, China. The OSL ages were determined by an automated Risø TL/OSL DA-20 reader. The magnetic susceptibility was measured by Bartington MS2 magnetic susceptibility meter; The grain size data were measured by a Malvern Mastersizer 2000 laser diffractometer; The bulk density data were determined by according to the oil-soaked method; The data set show the variation characteristics of magnetic susceptibility, grain size and bulk density of loess sequence in the eastern TP since the last glacial period, which plays an important role in studying the paleoenvironment, paleoclimate, dust accumulation history and its relationship with the surrounding atmospheric circulation in the eastern TP.
The dataset is from the transient experiment TRN40ka in Zhang et al (2021, Nature Geoscience), spanning 40ka-32ka BP with changing orbital parameters. For detailed description of experimental design, please refer to the original paper. Model details: COSMOS (ECHAM5-JSBACH-MPI-OM), a comprehensive fully coupled atmosphere–ocean general circulation model (AOGCM), is used to generate the dataset. The atmospheric model ECHAM5, complemented by the land surface component JSBACH, is used at T31 resolution (∼3.75°), with 19 vertical layers. The ocean model MPI-OM, including sea-ice dynamics that is formulated using viscous-plastic rheology, has a resolution of GR30 (3°×1.8°) in the horizontal, with 40 uneven vertical layers.
Paleo-shorelines are widely developed in the lakes of the Tibetan Plateau (TP), which record the history of paleo-lake level changes. The development age of the mega-lake represented by the highest paleo-shoreline is controversial. The age of the shoreline or the mega-lake can be obtained by measuring the burial age of the shoreline sand in the sedimentary strata of the paleo-shoreline by using the optical stimulated luminescence (OSL) dating technology. This data includes the OSL ages of the highest paleo-shorelines of three lakes in the northwestern TP. The dating is based on the K-feldspar pIRIR method developed in recent years, which effectively solves the problem that the quartz OSL signal is not suitable for dating in the study area. This data can provide key information for the evolution history of the mega-lakes on the TP.