A new OSL chronology for dust accumulation in the last 130,000 yr for the Chinese Loess Plateau

Lu, Yongcheng; Wang, X.L.; Wintle, A.G.

doi:10.1016/j.yqres.2006.08.003

Cited by 307 publications

(244 citation statements)

References 35 publications

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“…These results strongly support the idea that the Earth's thermal equator will move northward in a warmer world, and that the observed southward migration of the monsoon rain belt over the last few decades is transient and northern China will eventually become wet as global warming advances. studies (19,20,22,25) demonstrate that (i) L 1-1 was deposited in marine isotope stage (MIS) 2 (∼27-11 ka), which includes the LGM (∼26.5-19 ka) (26); (ii) S 0 was deposited in the early-midHolocene (∼11-3 ka), which includes the Holocene Thermal Maximum (HTM) (∼11-5 ka) (27); and (iii) L 1-2 was deposited in late MIS 3 (∼38-27 ka). To ensure that we used a complete cold-warm cycle for C 3 /C 4 vegetation reconstruction, almost all of the sections were sampled down to loess unit L 1-2 .…”

Section: Significancementioning

confidence: 99%

Warming-induced northwestward migration of the East Asian monsoon rain belt from the Last Glacial Maximum to the mid-Holocene

Yang

Ding

et al. 2015

Proc. Natl. Acad. Sci. U.S.A.

261

137

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Glacial-interglacial changes in the distribution of C 3 /C 4 vegetation on the Chinese Loess Plateau have been related to East Asian summer monsoon intensity and position, and could provide insights into future changes caused by global warming. Here, we present δ 13 C records of bulk organic matter since the Last Glacial Maximum (LGM) from 21 loess sections across the Loess Plateau. The δ 13 C values (range: -25‰ to -16‰) increased gradually both from the LGM to the mid-Holocene in each section and from northwest to southeast in each time interval. During the LGM, C 4 biomass increased from <5% in the northwest to 10-20% in the southeast, while during the mid-Holocene C 4 vegetation increased throughout the Plateau, with estimated biomass increasing from 10% to 20% in the northwest to >40% in the southeast. The spatial pattern of C 4 biomass in both the LGM and the mid-Holocene closely resembles that of modern warm-season precipitation, and thus can serve as a robust analog for the contemporary East Asian summer monsoon rain belt. Using the 10-20% isolines for C 4 biomass in the cold LGM as a reference, we derived a minimum 300-km northwestward migration of the monsoon rain belt for the warm Holocene. Our results strongly support the prediction that Earth's thermal equator will move northward in a warmer world. The southward displacement of the monsoon rain belt and the drying trend observed during the last few decades in northern China will soon reverse as global warming continues.

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Section: Significancementioning

confidence: 99%

Warming-induced northwestward migration of the East Asian monsoon rain belt from the Last Glacial Maximum to the mid-Holocene

Yang

Ding

et al. 2015

Proc. Natl. Acad. Sci. U.S.A.

261

137

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“…Luminescence dating is an essential technique for determining the age of the standard loess unit L1 and paleosol S1 on the CLP Lai, 2010;Lu et al, 2007). In NE China, Yi et al (2015) used both coarse-grained quartz SAR OSL and the K-feldspar post-IR infrared (IR) stimulated luminescence (post-IR IRSL; pIRIR 290) method to date L1 and S1 in the Sanbahuo section (42°18′ N, 118°41′ E, 677 m.a.s.l), which is located about 40 km northwest of the NYZG section.…”

Section: Pedostratigraphic Analysis Of the Nyzg Sectionmentioning

confidence: 99%

Long-term Pleistocene aridification and possible linkage to high-latitude forcing: New evidence from grain size and magnetic susceptibility proxies from loess-paleosol record in northeastern China

Zeng

et al. 2017

CATENA

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Loess deposits are regarded as good indicators of the inception and development of arid and semi-arid climate in central Asia and northern China during the late Cenozoic. In northeastern China extensive loess deposits are found surrounding the Horqin and Otindag sand fields, and they have great potential for reconstructing the long-term aridification history of the region. However, these loess deposits are currently poorly understood.Here, we present a high-resolution magnetic susceptibility (MS) and grain-size record spanning the last 1.0 Ma from a 36.6-m-thick loess-paleosol sequence at Niuyangzigou site (NYZG) in NE China. The grain-size record reveals a long-term drying trend in NE China since ca. 1.0 Ma, punctuated by two significant abrupt drying events at~0.65 Ma and~0.3 Ma. These results demonstrate a process of stepwise intensification of drying in NE China over the past 1 Ma, and lend support to the hypothesis that global ice volume/temperature changes were the major driver of the long-term aridification of Asian dust source areas. However, unlike the widely studied loess deposits on the central Chinese Loess Plateau (CLP), the MS record in paleosol units S1, S2 and S4 from the NYZG site do not show evidence of enhanced monsoon precipitation resulting from decreased global ice volume and the prolonged episodes of interglaciation after the Mid-Pleistocene Transition evident in the ice volume record. We hypothesize that this may be due to differences in the climatic sensitivity of the MS of Chinese loess deposits on a regional scale, rather than to in regional differences in monsoon intensity.

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“…Stevens et al, 2006;Buylaert et al, 2008;Lai, 2010) and fine (e.g. Watanuki et al, 2003;Lu et al, 2007) grains. Unfortunately Chinese loess (dust) may not contain sufficient coarse quartz grains (at least in the sand fraction), and the isolation of fine-grained quartz is time-consuming (Roberts and Wintle, 2001;Roberts, 2008).…”

Section: Introductionmentioning

confidence: 99%

IRSL and post-IR IRSL residual doses recorded in modern dust samples from the Chinese Loess Plateau

et al. 2011

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Using a set of modern/young (0 to about 200 years old) dust samples collected from the Chinese Loess Plateau the bleachability of IRSL measured at 50°C (IR 50 ) and post-IR 50 elevated temperature IRSL (measured at 225°C and at 290°C) is investigated by measuring the apparent (residual) doses recorded by these signals. Doses recorded by quartz OSL are used as a reference. Allowing for differences in dose rates it seems that both IRSL and post-IR IRSL signals yield residual doses that are significantly larger than the doses measured in quartz. These residual doses can be largely explained by thermal transfer caused by preheating. Nevertheless, we advise against the use of a low temperature preheat (<200°C) with IR 50 to date loess samples because, as has been reported before, the signal appears to be thermally unstable. In general, we conclude that it may not be advisable to apply post-IR IRSL dating to Chinese loess samples where residuals of up to ~20 Gy are a significant fraction of the total dose. However, these residuals quickly become unimportant when dating older samples, and this is the age range in which post-IR IRSL dating is likely to be most useful.

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A new OSL chronology for dust accumulation in the last 130,000 yr for the Chinese Loess Plateau

Cited by 307 publications

References 35 publications

Warming-induced northwestward migration of the East Asian monsoon rain belt from the Last Glacial Maximum to the mid-Holocene

Warming-induced northwestward migration of the East Asian monsoon rain belt from the Last Glacial Maximum to the mid-Holocene

Long-term Pleistocene aridification and possible linkage to high-latitude forcing: New evidence from grain size and magnetic susceptibility proxies from loess-paleosol record in northeastern China

IRSL and post-IR IRSL residual doses recorded in modern dust samples from the Chinese Loess Plateau

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