Oxygen‐18 and carbon‐13 records for the last 14,000 years from Lacustrine carbonates of Siling‐Co (Lake) in the Qinghai‐Tibetan Plateau

Morinaga, Hayao; Itota, Chizu; Isezaki, Nobuhiro; Goto, Hiroya; Yaskawa, Katsumi; Kusakabe, Minoru; Liu, J.; Gu, Zhaoyan; Yuan, Bao‐Zhong; Cong, Shaoguang

doi:10.1029/93gl02982

Cited by 58 publications

(13 citation statements)

References 13 publications

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“…Lake status is an index of the water balance (precipitation minus evaporation) over the lake and its catchment. Lake histories produced since the publication of the GLSDB have also been compiled and are included in our analyses—see the supporting information for details [ Bird et al ., ; Boomer et al ., ; Chen et al ., ; Chawchai et al ., ; Chen et al ., ; Ferronskii et al ., ; Fowell et al ., ; Gasse et al ., ; Grunert et al ., ; Kong et al ., ; Heinecke et al ., ; Herzschuh et al ., ; Hodell et al ., ; Huang et al ., , ; Jiang et al ., ; Jiang and Liu , ; Li and Morrill , ; Li et al ., , , ; Long et al ., ; Madsen et al ., ; Mathis et al ., ; Mingram et al ., ; Morinaga et al ., ; Morrill et al ., ; Pan et al ., ; Peck et al ., ; Penny et al ., ; Prokopenko et al ., ; Rades et al ., ; Ricketts et al ., ; Schwanghart et al ., ; Shen et al ., ; Sheng et al ., ; Wang et al ., ; Wang and Ji , ; Wünnemann et al ., , ; Xiao et al ., ; Yang et al ., ; Zhang et al ., , ; Zhao et al ., , , ; Zhou et al ., ]. BIOME 6000 provides pollen‐based reconstructions of vegetation for the MH [ Prentice et al ., ; Bigelow et al ., ], and the reconstructions for Eurasia have been updated by Binney et al .…”

Section: Methodsmentioning

confidence: 99%

Underlying causes of Eurasian midcontinental aridity in simulations of mid‐Holocene climate

Bartlein

Harrison

Izumi

2017

Geophysical Research Letters

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Climate model simulations uniformly show drier and warmer summers in the Eurasian midcontinent during the mid‐Holocene, which is not consistent with paleoenvironmental observations. The simulated climate results from a reduction in the zonal temperature gradient, which weakens westerly flow and reduces moisture flux and precipitation in the midcontinent. As a result, sensible heating is favored over evaporation and latent heating, resulting in substantial surface‐driven atmospheric warming. Thus, the discrepancy with the paleoenvironmental evidence arises initially from a problem in the simulated circulation and is exacerbated by feedback from the land surface. This region is also drier and warmer than indicated by observations in the preindustrial control simulations, and this bias arises in the same way: zonal flow and hence moisture flux into the midcontinent are too weak, and feedback from the land surface results in surface‐driven warming. These analyses suggest the need to improve those aspects of climate models that affect the strength of westerly circulation.

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Section: Methodsmentioning

confidence: 99%

Underlying causes of Eurasian midcontinental aridity in simulations of mid‐Holocene climate

Bartlein

Harrison

Izumi

2017

Geophysical Research Letters

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“…1). Five lakes are on the Tibetan Plateau: Selin Co Morinaga et al, 1993;Kashiwaya et al, 1995) and Ahung Co (Morrill, 2004;Morrill et al, 2006) on the central-southern Tibetan Plateau; and Koucha Lake (Mischke et al, 2008), Donggi Cona (Mischke et al, 2010) and Qinghai Lake (Lister et al, 1991;Liu et al, 2007) are on the northeastern Tibetan Plateau. Three lakes lie on the northern margin of the Chinese Loess Plateau in northern China: Hamaertai Lake , Hetongchahan Nur and Bahan Nur (Guo et al, 2007).…”

Section: Comparison Of Lacustrine and Marine δD N And δ 18 O C And Stmentioning

confidence: 99%

Investigating the long-term palaeoclimatic controls on the δD and δ18O of precipitation during the Holocene in the Indian and East Asian monsoonal regions

Rao

Zhang

et al. 2016

Earth-Science Reviews

112

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This paper aims to achieve an improved understanding of the long-term change trends of precipitation δD and δ 18 O values (δD p and δ 18 O p ) in the Asian monsoonal region and their relationship with the corresponding humidity trends during the Holocene. To do this we first review the observed modern spatial pattern of summer precipitation distribution in the East Asian summer monsoon (EASM) region under different EASM intensities, and the relationship between modern observed δ 18 O p values and corresponding precipitation amounts on monthly and inter-annual timescales in the EASM and Indian summer monsoon (ISM) regions. Second, we compare Holocene lacustrine and marine compound-specific hydrogen isotopic records of n-alkanes/n-alkanoic acid (δD n ), lacustrine authigenic carbonate and cave stalagmite oxygen isotopic records (δ 18 O c and δ 18 O s ) from the Asian monsoonal region, all of which are closely related to δD p and δ 18 O p variations. The results demonstrate that in both the ISM and EASM regions, all of these isotopic records exhibit roughly similar long-term characteristics, i.e. they were all more negative during the early-Holocene and early mid-Holocene (ca. 11-6 ka B.P.; B.P. means before present, present = 1950 AD), and then became more positive towards the late-Holocene. Third, we compare representative paleo-humidity records from the Asian monsoonal region; the results confirm that, in the ISM region, a humid interval occurred in the early-Holocene and early mid-Holocene (ca. 11-6 ka B.P.) and subsequently the climate became more arid towards the late-Holocene. This indicates an enhanced ISM during the early-Holocene and early mid-Holocene (ca. 11-6 ka B.P.), and an ISM of decreasing intensity towards the late-Holocene. On a Holocene orbital scale, both δ 18 O p and δD p appear to be controlled by an "amount effect" in the ISM region, consistent with the region's inter-annual modern δ 18 O p data. This evidence indicates that both δ 18 O p and δD p paleo-records are significantly related to paleo-humidity in the ISM region. In contrast, Holocene humidity variations in the EASM region exhibit clear spatial differences: a humid mid-Holocene interval (ca. 8-3 ka B.P.) occurred in southern and northern China, but an arid interval from ca. 7-3 ka B.P. occurred in central China, in the middle reaches of the Yangtze River. Based on precipitation distribution patterns under different EASM intensities in the EASM region over the past few decades, we conclude that EASM intensity was enhanced during the mid-Holocene (ca. 8-3 ka B.P.). Relative to the ISM intensity, the response of EASM intensity to summer insolation was relatively slow. In the EASM region the relationship between climate and δ 18 O p and δD p is more complex, consistent with analyses of regional inter-annual modern δ 18 O p data. This evidence demonstrates that both δ 18 O p and δD p paleo-records cannot be used directly as paleo-humidity (i.e. precipitation amount or EASM intensity) indicators in the EASM region. Further comparison and ...

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“…Due to a lack of terrestrial macrofossils, age models for Tibetan lake records have been based on radiocarbon dates of aquatic material. These lakes have hard-water effects as large as 3200 yr , however, and possible variations in the hard-water effect through time were not taken into account in every case (Gasse et al, 1991Lister et al, 1991;Morinaga et al, 1993). This new record from Ahung Co has an accurate age model based on more than 50 radiocarbon dates of both aquatic material and terrestrial charcoal.…”

Section: Introductionmentioning

confidence: 99%

Holocene variations in the Asian monsoon inferred from the geochemistry of lake sediments in central Tibet

et al. 2006

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We present a record of monsoon variations for the early and middle Holocene that is inferred from the geochemistry of sediment cores from Ahung Co, a lake in central Tibet. The resolution of this record is better than 50 yr and the age model is derived from radiocarbon ages of terrestrial charcoal, which eliminates errors associated with the lake hard-water effect. We made down-core geochemical measurements of % carbonate, % organic carbon, C/N and d 13 C of bulk organic matter, d 13 C and d 18O of carbonate, and % dolomite. Proxy calibration and modern water-balance reconstruction show that these are proxies for lake depth and the amount of monsoon precipitation. We find that lake level and monsoon precipitation have been decreasing at Ahung Co since the early Holocene (¨7500 cal yr B.P.). Superimposed on this trend are rapid declines in monsoon rainfall at 7000 -7500 and 4700 cal yr B.P. and seven century-scale wet -dry oscillations. The cores do not contain sediment from the last¨4000 yr. Surface sediments from the lake accumulated during the 20th century, however. From this, we argue that lake levels have risen again recently following a late Holocene dry period.

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Oxygen‐18 and carbon‐13 records for the last 14,000 years from Lacustrine carbonates of Siling‐Co (Lake) in the Qinghai‐Tibetan Plateau

Cited by 58 publications

References 13 publications

Underlying causes of Eurasian midcontinental aridity in simulations of mid‐Holocene climate

Underlying causes of Eurasian midcontinental aridity in simulations of mid‐Holocene climate

Investigating the long-term palaeoclimatic controls on the δD and δ18O of precipitation during the Holocene in the Indian and East Asian monsoonal regions

Holocene variations in the Asian monsoon inferred from the geochemistry of lake sediments in central Tibet

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