Climatic and environmental changes over the last millennium recorded in the Malan ice core from the northern Tibetan Plateau

Wang, Ninglian; Yao, Tandong; Pu, Jianchen; Zhang, Yongliang; Sun, Weijun

doi:10.1007/s11430-006-1079-9

Cited by 46 publications

(36 citation statements)

References 42 publications

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“…Among them, data from NE and SE are extended to 2000 based on records of warm/cold periods in historical documents (Hao et al, 2011). In TP and NW, some of the original temperature proxies have been updated (in TP: Thompson et al, 2000Thompson et al, , 2003Thompson et al, , 2006Shen et al, 2001;Liu et al, 2006;Wang et al, 2006;Zhu et al, 2008;in NW: Liu et al, 2005;Zhang et al, 2011), and we were able to re-evaluate the records of temperature change in these two regions using the method of Ge et al (2010). The decadal temperature time series extends from 1 to 2000 in CE, TP and NE; from 851 to 2000 in NW; and from 1471 to 2000 in SE.…”

Section: Q Ge Et Al: Temperature Changes Over the Past 2000 Yr In Cmentioning

confidence: 99%

Temperature changes over the past 2000 yr in China and comparison with the Northern Hemisphere

et al. 2013

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We use principal component regression and partial least squares regression to separately reconstruct a composite series of temperature variations in China, and associated uncertainties, at a decadal resolution over the past 2000 yr. The reconstruction is developed using proxy temperature data with relatively high confidence levels from five regions across China, and using a temperature series from observations by the Chinese Meteorological Administration, covering the period from 1871 to 2000. Relative to the 1851–1950 climatology, our two reconstructions show four warm intervals during AD 1–AD 200, AD 551–AD 760, AD 951–AD 1320, and after AD 1921, and four cold intervals during AD 201–AD 350, AD 441–AD 530, AD 781–AD 950, and AD 1321–AD 1920. The temperatures during AD 981–AD 1100 and AD 1201–AD 1270 are comparable to those of the Present Warm Period, but have an uncertainty of ±0.28 °C to ±0.42 °C at the 95% confidence interval. Temperature variations over China are typically in phase with those of the Northern Hemisphere (NH) after 1000, a period which covers the Medieval Climate Anomaly, the Little Ice Age, and the Present Warm Period. In contrast, a warm period in China during AD 541–AD 740 is not obviously seen in the NH

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Section: Q Ge Et Al: Temperature Changes Over the Past 2000 Yr In Cmentioning

confidence: 99%

Temperature changes over the past 2000 yr in China and comparison with the Northern Hemisphere

et al. 2013

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“…Rsearches have proved that the δ 18 O components in the ice cores were reliable substitute index of temperature (e.g. Yao and Thompson 1992;Thompson et al, 1993;Yao et al, 1997;Wang N et al, 2006). However, the isotope information interpretation was largely depended on the knowledge of variation characteristics of stable isotope information contained in the modern precipitation (Yu et al, 2006).…”

Section: δ 18 O Thermometermentioning

confidence: 99%

Isotopic composition of precipitation over Arid Northwestern China and its implications for the water vapor origin

Liu

Song

Sun³

et al. 2009

J. Geogr. Sci.

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In order to reveal the characteristics and climatic controls on the stable isotopic composition of precipitation over Arid Northwestern China, eight stations have been selected from Chinese Network of Isotopes in Precipitation (CHNIP). During the year 2005 and 2006, monthly precipitation samples have been collected and analyzed for the composition of δD and δ 18 O. The established local meteoric water line δD=7.42δ 18 O+1.38, based on the 95 obtained monthly composite samples, could be treated as isotopic input function across the region. The deviations of slope and intercept from the Global Meteoric Water Line indicated the specific regional meteorological conditions. The monthly δ 18 O values were characterized by a positive correlation with surface air temperature (δ 18 O (‰) =0.33 T (℃)-13.12). The amount effect visualized during summer period (δ 18 O (‰) = -0.04P (mm)-3.44) though not appeared at a whole yearly-scale. Spatial distributions of δ 18 O have properly portrayed the atmospheric circulation background in each month over Arid Northwestern China. The quantitative simulation of δ 18 O, which involved a Rayleigh fractionation and a kinetic fractionation, demonstrated that the latter one was the dominating function of condensation of raindrops. Furthermore, the raindrop suffered a re-evaporation during falling processes, and the precipitation vapor might have been mixed with a quantity of local recycled water vapor. Multiple linear regression equations and a δ 18 O-T relation have been gained by using meteorological parameters and δ 18 O data to evaluate physical controls on the long-term data. The established δ 18 O-T relation, which has been based on the present-day precipitation, could be considered as a first step of quantitatively reconstructing the historical environmental climate.

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“…ratio of dust layer thickness to ice thickness (i.e. the dust ratio) could be used as a proxy for dust event frequency in the Malan ice core, and found that the variations in the dust ratio were similar to the variations in dust events occurring in south Xingjiang over the past decades [26] . Figure 2(a) illustrates the variations in the dust ratio over the past century.…”

Section: Dust Proxies and Their Data Seriesmentioning

confidence: 88%

Variations in dust event frequency over the past century reflected by ice-core and lacustrine records in north China

Wang

Yang

Shen

et al. 2007

Sci. China Ser. D-Earth Sci.

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In this paper, we analyzed the variations of dust proxies in the Dunde, Malan and Chongce ice cores from the northern Tibetan Plateau and the Hongjiannao lacustrine sediment core from north Shaanxi Province, and found that they all showed a general decrease trend over the past century. Owing to the fact that all these ice cores and lacustrine core were retrieved from the margins and/or the leeward sides of the major areas of dust events in north China, their records could suggest that the dust event frequency in north China declined over the study period. This decrease trend might be attributed to increasing precipitation and weakening westerly. However, human activities have made the areal extent of desertification expand acceleratingly in north China. This status could make it possible that dust events would occur on a large spatial scale under the future climate change, which would be a big environmental issue we shall face.north China, dust event frequency, climate changeThe role of dust in climate system has attracted much more attention [1,2] . To better understand the causes of climate change, it is important to reconstruct the history of atmospheric dust loading. Generally, dust weather is a major process of continental dust entering the atmosphere, and the occurrences of dust events (dust storm, blowing dust, floating dust) are highly regional. Thus reconstructions of the history of dust event frequency in different areas, especially in the major dust source areas and their adjacent regions, such as the arid region in north China, are the basic works for study on the variations in atmospheric dust loading and its effects on climate and environment. Moreover, it is not clear what the major causes of recent variations of dust events in north China are, natural factors or human factors [3−7] . Meteorological observation data showed that the trends of variations in dust event frequency in most parts of north China were similar over the past several decades [8] .Therefore, investigating the causes of variations in dust event frequency in the areas with less human activities, such as in the northern Tibetan Plateau, could help us to understand the causes of variations in dust event frequency in most other areas of north China where human activities are concentrated. The study on the secular variations in dust event frequency in large parts of north China is of important significance for the prediction of dust events also. In this paper, we will analyze the variations in dust event frequency over the past century in north China using the ice-core and lacustrine records, and try to clarify the causes of the past variations of dust

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Climatic and environmental changes over the last millennium recorded in the Malan ice core from the northern Tibetan Plateau

Cited by 46 publications

References 42 publications

Temperature changes over the past 2000 yr in China and comparison with the Northern Hemisphere

Temperature changes over the past 2000 yr in China and comparison with the Northern Hemisphere

Isotopic composition of precipitation over Arid Northwestern China and its implications for the water vapor origin

Variations in dust event frequency over the past century reflected by ice-core and lacustrine records in north China

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