1000 years of climatic change in China: ice-core δ18O evidence

Lin, Ping-Nan; Thompson, L. G.; Davis, M. E.; Mosley‐Thompson, Ellen

doi:10.1017/s0260305500015809

Cited by 15 publications

(13 citation statements)

References 17 publications

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“…Fig. 5 shows the variations of climatic and environmental records in the Malan, Guliya and Dunde ice cores [28][29][30] from the northern Tibetan Plateau. As expected, the low-frequency variations in air temperatures (i.e., cold and warm epochs as reflected by δ 18 O records) in these three cores could be comparable, but there existed differences in the occurring time, magnitude and duration of each cold or warm epoch in these three records.…”

Section: Discussionmentioning

confidence: 99%

“…Statistical analysis for the decadal averages of accumula- [28] ; c, δ 18 O in the Dunde ice core [29] ; d, accumulation rate in the Guliya ice core [28] ; e, accumulation rate in the Dunde ice core [30] ; f, dust ratio in the Malan ice core; g, particle concentration in the Guliya ice core [30] . The grey columns represent the periods with cold and dry climate and high dust concentration.…”

Section: Discussionmentioning

confidence: 99%

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

Wang

Yao

et al. 2006

SCI CHINA SER D

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In this paper, climatic and environmental changes were reconstructed since 1129A.D.based on the Malan ice core from Hol Xil, the northern Tibetan Plateau. The record of δ 18 O in the Malan ice core indicated that the warm-season air temperature variations displayed a general increase trend, the 20th-century warming was within the range of natural climate variability, and the warmest century was the 17th century while the warmest decade was the 1610s, over the entire study period. The "Medieval Warm Epoch" and "Little Ice Age" were also reflected by the ice core record. The dust ratio in the Malan ice core is a good proxy for dust event frequency. The 870-year record of the dust ratio showed that dust events occurred much frequently in the 19th century. Comparing the variations of δ 18 O and the dust ratio, it is found that there was a strong negative correlation between them on the time scales of 10 1 -10 2 years. By analyses of all the climatic records of ice cores and tree rings from the northern Tibetan Plateau, it was revealed that dust events were more frequent in the cold and dry periods than in the warm and wet periods.Keywords: the Tibetan Plateau, the Malan ice core, climate changes, dust event frequency.Conventional wisdom on the climate of the last millennium is very simple, a "Medieval Warm Epoch" (MWE), a "Little Ice Age" (LIA) and then globally extensive warming. With the accumulations of the paleoclimatic data from different regions of the globe, this view, based almost extensively on evidence from western Europe and the North Atlantic region [1,2] , has been reassessed [3][4][5][6][7] . Moreover, it was revealed that air temperatures in some areas went down in the recent decades [8][9][10] , even though the most areas of the globe were warming. These suggest that climate changes have temporal and spatial differences. Recently, several studies have reconstructed the variations of hemispherical or global air temperatures over the last millennium [11][12][13][14][15] . These reconstructions for the early time period might be possibly biased towards the variations of air temperatures in the regions with long data sets, because the number of the samples of the data sets longer than 400 years was small. There also exist some differences among these reconstructions, which might be caused by the fact that the different methods were used and/or the data from different regions were 1080 Science in China Series D: Earth Sciences selected. However, to reveal the nature of air temperature variations in the hemispherical and/or global scales and the temporal and spatial differences of the air temperature variations in different regions is the basis for understanding the inner and exterior causes of climate change and predicting the future climate change. In order to better resolve these issues, much more new paleoclimatic records with long period and high resolution need to be gained from different regions, especially from the regions where paleoclimatic data are lack. In this paper, we will reconstruct a recor...

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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

Wang

Yao

et al. 2006

SCI CHINA SER D

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“…Four of the series are related to the Tibetan Plateau (TP) (Guliya ice core, Dunde ice core, Dulan tree-ring record in the northeastern TP and a composite tree-ring record from the southern TP) and 5 series were obtained from Eastern China and Japan. A close correlation between the annual averages of ice core d 18 O and mean annual air temperatures from the nearby Mangnai meteorological station indicates that d 18 O in the Guliya ice core [Shi et al, 1999] is a reasonable proxy for the near surface air temperature [Lin et al, 1995]. The d 18 O values also correlate (r = 0.2 to 0.4) with annual temperature observations from the Xinjiang region in China for the period from 1951 to 1996 [Wang et al, 1998].…”

Section: Methodsmentioning

confidence: 99%

“…The d 18 O values also correlate (r = 0.2 to 0.4) with annual temperature observations from the Xinjiang region in China for the period from 1951 to 1996 [Wang et al, 1998]. Likewise, ice-core d 18 O records of Dunde are regarded to represent temperature changes in northwestern China (mainly in the Inner Mongolia region), since they correlate closely (r = 0.2 to 0.37) to the temperature observations of that region for the period from 1951 to 1996 [Lin et al, 1995;Wang et al, 1998]. We used the d 18 O values measured from core 3 because their sample number (7045) more than doubles the sample number (3280) in core 1 [Thompson et al, 1993].…”

Section: Methodsmentioning

confidence: 99%

General characteristics of temperature variation in China during the last two millennia

Yang

Braeuning

Johnson

et al. 2002

Geophysical Research Letters

388

298

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Three alternate China‐wide temperature composites covering the last 2000 years were established by combining multiple paleoclimate proxy records obtained from ice cores, tree rings, lake sediments and historical documents. Five periods of temperature variation can be identified: a warm stage in AD 0–240, a cold interval between AD 240 and 800, a return to warm conditions from AD 800–1400, including the Medieval Warm Period between AD 800–1100, the cool Little Ice Age period between 1400–1920, and the present warm stage since 1920. Regional temperature variation is found during AD 800–1100, when warm conditions occurred in Eastern China and in the northeastern Tibetan Plateau and in AD 1150–1380, when the southern Tibetan Plateau experienced a warm interval. In contrast, evidence for cool conditions during the LIA is more consistent among the proxy records. The temperature reconstructions for China and the Northern Hemisphere show good agreement over the past millennium.

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“…O isotopic ratios [Yao and Thompson, 1992;Lin et al, 1995;Yao et al, 1995;Aizen et al, 1996], we compared the highest d…”

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confidence: 99%

Association between atmospheric circulation patterns and firn‐ice core records from the Inilchek glacierized area, central Tien Shan, Asia

Aizen

Mélack

et al. 2004

J. Geophys. Res.

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[1] Glacioclimatological research in the central Tien Shan was performed in the summers of 1998 and 1999 on the South Inilchek Glacier at 5100-5460 m. A 14.36 m firn-ice core and snow samples were collected and used for stratigraphic, isotopic, and chemical analyses. The firn-ice core and snow records were related to snow pit measurements at an event scale and to meteorological data and synoptic indices of atmospheric circulation at annual and seasonal scales. Linear relationships between the seasonal air temperature and seasonal isotopic composition in accumulated precipitation were established. Changes in the d18 O air temperature relationship, in major ion concentration and in the ratios between chemical species, were used to identify different sources of moisture and investigate changes in atmospheric circulation patterns. Precipitation over the central Tien Shan is characterized by the lowest ionic content among the Tien Shan glaciers and indicates its mainly marine origin. In seasons of minimum precipitation, autumn and winter, water vapor was derived from the arid and semiarid regions in central Eurasia and contributed annual maximal solute content to snow accumulation in Tien Shan. The lowest content of major ions was observed in spring and summer layers, which represent maximum seasonal accumulation when moisture originates over the Atlantic Ocean and Mediterranean and Black Seas.

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1000 years of climatic change in China: ice-core δ18O evidence

Cited by 15 publications

References 17 publications

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

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

General characteristics of temperature variation in China during the last two millennia

Association between atmospheric circulation patterns and firn‐ice core records from the Inilchek glacierized area, central Tien Shan, Asia

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