Alkenone‐based reconstruction of late‐Holocene surface temperature and salinity changes in Lake Qinghai, China

Liu, Zhonghui; Henderson, Andrew C.G.; Huang, Yongsong

doi:10.1029/2006gl026151

Cited by 89 publications

(79 citation statements)

References 29 publications

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“…Exact reasons remain unclear, but we suspect that it might be related to the lower sedimentation rates in Lake Sugan, as well as potential chronology uncertainty. The two temperature records are broadly consistent with each other and the lower-resolution alkenone-based record from Lake Qinghai [34] (~300 km east to Lake Gahai) (Figure 1), particularly over the last 1500 years. Also our records are in accordance with the tree ring based temperature reconstructions in the mid-eastern Tibetan Plateau [35].…”

Section: Resultssupporting

confidence: 76%

“…Our two alkenone-based temperature records from the Qaidam Basin, together with the Lake Qinghai one [34], indicate persistently warm temperatures on the Northern Tibetan Plateau during the MWP (Figure 3), in accordance with the uncertainty analysis suggesting that the warmth during the 10-14th centuries might be comparable in magnitude to the warming of the last few decades [24]. These records join a growing body of such evidence [4,8,10,12,24,46].…”

Section: The Medieval Warm Periodsupporting

confidence: 85%

“…Over the past two decades, the U 3 k′ 7 proxy has been widely used to quantitatively reconstruct sea surface temperature changes on various timescales, and proved to be one of the best temperature proxies to date. Although largely applied in marine settings previously, its capability for temperature reconstructions from lake sediments has been indicated by recent studies [30,32,34,[37][38][39][40][41][42][43][44][45]. Chu et al [37] In this study, we interpret U 3 k′ 7 reflecting summer lake surface temperature, using the culture calibration from Sun et al [32].…”

Section: Discussionmentioning

confidence: 96%

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Solar influenced late Holocene temperature changes on the northern Tibetan Plateau

Liu

Zhao

et al. 2013

Chin. Sci. Bull.

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Considerable efforts have been made to extend temperature records beyond the instrumental period through proxy reconstructions, in order to further understand the mechanisms of past climate variability. Yet, the global coverage of existing temperature records is still limited, especially for some key regions like the Tibetan Plateau and for earlier times including the Medieval Warm Period (MWP). Here we present decadally-resolved, alkenone-based, temperature records from two lakes on the northern Tibetan Plateau. Characterized by marked temperature variability, our records provide evidence that temperatures during the MWP were slightly higher than the modern period in this region. Further, our temperature reconstructions, within age uncertainty, can be well correlated with solar irradiance changes, suggesting a possible link between solar forcing and natural climate variability, at least on the northern Tibetan Plateau.

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Section: Resultssupporting

confidence: 76%

Section: The Medieval Warm Periodsupporting

confidence: 85%

Section: Discussionmentioning

confidence: 96%

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Solar influenced late Holocene temperature changes on the northern Tibetan Plateau

Liu

Zhao

et al. 2013

Chin. Sci. Bull.

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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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“…In most cases, climate proxies established in the marine environment cannot be applied in lacustrine settings. For example, in contrast to marine sediments (Brassell et al 1987;Schouten et al 2003), organic geochemical proxies for reconstructing lakewater temperature were, until recently, scarce (Liu et al 2006;Hou et al 2007). Recent investigations indicate that membrane lipids of Crenarchaeota, a subgroup of the Archaea, also hold promise as recorders of past lake-surface temperature (Powers et al 2004).…”

Section: Introductionmentioning

confidence: 99%

Tetraether membrane lipid distributions in water-column particulate matter and sediments: a study of 47 European lakes along a north–south transect

et al. 2008

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We studied the distribution of glycerol dialkyl glycerol tetraethers (GDGTs) in water-column particulate matter and the top 5 cm of sediment from 47 lakes along a transect from southern Italy to the northern part of Scandinavia. Our objective was to investigate the biological sources and potential palaeoenvironmental applications of GDGTs in lacustrine sediments. Both archaea-derived isoprenoid and bacteria-derived branched GDGTs, produced by yet unknown soil bacteria, were identified in all lake sediments. GDGT distributions varied substantially. Crenarchaeotal GDGTs, including the characteristic GDGT crenarchaeol, were found in varying relative concentrations, and were more dominant in lakes from the Alps and some of the lakes from the more southern part of the latitudinal transect. In some lakes, we observed high amounts of the GDGT with no cyclopentane moieties relative to crenarchaeol. As methanogenic Euryarchaeota are known to biosynthesise this GDGT predominantly, these Archaea, rather than Crenarchaeota, may be its dominant biological source. In most of the lakes, high amounts of soil-bacteria-derived, branched GDGTs ([40% of total GDGTs) indicated a substantial contribution from soil erosion. Branched GDGTs dominated, especially in the northern lakes, possibly related to high soil-erosion rates. In many of the lakes, soil input affects the distribution of isoprenoidal GDGTs and prevents the reliable application of the TEX 86 temperature proxy for lake water temperature, which is based on in situ crenarchaeotal GDGTs production. In 9 out of the 47 lakes studied, the TEX 86 temperature proxy could be used reliably. When we compared the TEX 86 correlation with annual and winter lake-surface temperature, respectively, the relationship between TEX 86 and winter temperature was slightly stronger. This may indicate the season in which these GDGTproducing organisms have their peak production.

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Alkenone‐based reconstruction of late‐Holocene surface temperature and salinity changes in Lake Qinghai, China

Cited by 89 publications

References 29 publications

Solar influenced late Holocene temperature changes on the northern Tibetan Plateau

Solar influenced late Holocene temperature changes on the northern Tibetan Plateau

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

Tetraether membrane lipid distributions in water-column particulate matter and sediments: a study of 47 European lakes along a north–south transect

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