A chironomid-based salinity inference model from lakes on the Tibetan Plateau

Zhang, Enlou; Jones, Richard T.; Bedford, Alan; Langdon, Peter G.; Tang, Hongqu

doi:10.1007/s10933-006-9080-z

Cited by 49 publications

(42 citation statements)

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“…The statistical significance of these zones was evaluated by a broken stick model [32] . Palaeosalinity was estimated for each fossil assemblage using a chironomid-salinity transfer function for Tibetan Plateau lakes developed by Zhang et al [18] . This calibration data set was based on surface-samples from 38 lakes on the Tibetan Plateau, spanning a modern salinity (TDS) range of 0.24-56.59 g/L.…”

Section: Methodsmentioning

confidence: 99%

“…Chironomid-based palaeosalinity studies have been carried out in Equatorial Africa [1315] and southwestern Canada [16,17] , and the effective moisture changes have been convincingly reconstructed. In China, Zhang et al [18] developed the first chironomidsalinity inference model from 38 Tibetan Plateau lakes (including Sugan Lake). Subsequent work further indicated that fossil chironomids could be a sensitive proxy for salinity fluctuations in Sugan Lake at the 50 to 100-year scale [19] .…”

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confidence: 99%

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A 1000-year chironomid-based salinity reconstruction from varved sediments of Sugan Lake, Qaidam Basin, arid Northwest China, and its palaeoclimatic significance

Chen

Zhang

et al. 2009

Chin. Sci. Bull.

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A 1000-year high-resolution (~10 years) chironomid record from varved sediments of Sugan Lake, Qaidam Basin on the northern Tibetan Plateau, is presented. The chironomid assemblages are mainly composed of the relatively high-saline-water taxa Psectrocladius barbimanus-type and Orthocladius/ Cricotopus, and the relatively low-saline-water taxa Procladius and Psectrocladius sordidellus-type. Variations in the chironomid fauna and inferred salinities suggest that over the last millennium, the Sugan Lake catchment has alternated between contrasting climatic conditions, having a dry climate during the period 990-1550 AD, a relatively humid climate during the Little Ice Age (LIA) (1550-1840 AD), and a dry climate again from 1840 AD onwards. At the decadal to centennial scale, a wet event around 1200-1230 AD, interrupting the generally arid period (990-1550 AD), and a dry event around 1590-1700 AD, punctuating the generally humid period (1550-1840 AD), are clearly documented. Trends in the chironomid-based salinity time series indicate a highly unstable climate during the LIA when salinity fluctuations were of greater magnitude and higher frequency. The effective moisture evolution in the Sugan Lake catchment during the last millennium reconstructed by chironomid analysis is in broad agreement with previous palaeo-moisture data derived from other sites in arid Northwest China (ANC). The LIA, characterized by generally humid conditions over the westerly-dominated ANC was distinctly different from that in monsoonal China, implying an "out-of-phase" relationship between moisture evolution in these two regions during the past 1000 years.

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Section: Methodsmentioning

confidence: 99%

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confidence: 99%

A 1000-year chironomid-based salinity reconstruction from varved sediments of Sugan Lake, Qaidam Basin, arid Northwest China, and its palaeoclimatic significance

Chen

Zhang

et al. 2009

Chin. Sci. Bull.

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“…Subfossil chironomids have been successfully used as paleoenvironmental indicators in China for over a decade. These included salinity studies on the Tibetan Plateau (Zhang et al, 2007) and the development of a nutrient-based inference model for eastern China and parts of Yunnan (Zhang et al, 2006(Zhang et al, , 2010(Zhang et al, , 2011(Zhang et al, , 2012. A large database of relatively undisturbed lakes, in which nutrient changes are minimal while temperature gradients are suitably large, is now available from south-western China and this provides the opportunity to develop a summer temperature inference model for this broad region.…”

Section: E Zhang Et Al: a Chironomid-based Mean July Temperature Inmentioning

confidence: 99%

A chironomid-based mean July temperature inference model from the south-east margin of the Tibetan Plateau, China

et al. 2017

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Abstract.A chironomid-based calibration training set comprised of 100 lakes from south-western China was established. Multivariate ordination analyses were used to investigate the relationship between the distribution and abundance of chironomid species and 18 environmental variables from these lakes. Canonical correspondence analyses (CCAs) and partial CCAs showed that mean July temperature is one of the independent and significant variables explaining the second-largest amount of variance after potassium ions (K + ) in 100 south-western Chinese lakes. Quantitative transfer functions were created using the chironomid assemblages for this calibration data set. The second component of the weighted-average partial least squares (WA-PLS) model produced a coefficient of determination (r 2 bootstrap ) of 0.63, maximum bias (bootstrap) of 5.16 and root-mean-square error of prediction (RMSEP) of 2.31 • C. We applied the transfer functions to a 150-year chironomid record from Tiancai Lake (26 • 38 3.8 N, 99 • 43 E; 3898 m a.s.l.), Yunnan, China, to obtain mean July temperature inferences. We validated these results by applying several reconstruction diagnostics and comparing them to a 50-year instrumental record from the nearest weather station (26 • 51 29.22 N, 100 • 14 2.34 E; 2390 m a.s.l.). The transfer function performs well in this comparison. We argue that this 100-lake large training set is suitable for reconstruction work despite the low explanatory power of mean July temperature because it contains a complete range of modern temperature and environmental data for the chironomid taxa observed and is therefore robust.

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“…Walker and Cwynar, 2006;Rees et al, 2008;Eggermont et al, 2010;Heiri et al, 2011;Nazarova et al, 2011;Massaferro and Larocque-Tobler, 2013). The paleoenvironmental application of chironomid analysis is relatively recent in China, and studies have concentrated mainly on lake ecology, including analysis of total phosphorus in the middle and lower reaches of the Yangtze River (Zhang et al, 2006), salinity on the Tibetan Plateau (Zhang et al, 2007;Chen et al, 2009), lake water depth in the arid region of northwest China and precipitation near the EASM boundary (Wang et al, 2016). Currently, there is only one chironomid-based temperature record, which was obtained from the southeastern Tibetan Plateau (Zhang et al, 2017a, b).…”

Section: Introductionmentioning

confidence: 99%

A chironomid-based record of temperature variability during the past 4000 years in northern China and its possible societal implications

et al. 2018

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Abstract. Long-term, high-resolution temperature records which combine an unambiguous proxy and precise dating are rare in China. In addition, the societal implications of past temperature change on a regional scale have not been sufficiently assessed. Here, based on the modern relationship between chironomids and temperature, we use fossil chironomid assemblages in a precisely dated sediment core from Gonghai Lake to explore temperature variability during the past 4000 years in northern China. Subsequently, we address the possible regional societal implications of temperature change through a statistical analysis of the occurrence of wars. Our results show the following. (1) The mean annual temperature (TANN) was relatively high during 4000-2700 cal yr BP, decreased gradually during 2700-1270 cal yr BP and then fluctuated during the last 1270 years. (2) A cold event in the Period of Disunity, the Sui-Tang Warm Period (STWP), the Medieval Warm Period (MWP) and the Little Ice Age (LIA) can all be recognized in the paleotemperature record, as well as in many other temperature reconstructions in China. This suggests that our chironomidinferred temperature record for the Gonghai Lake region is representative. (3) Local wars in Shanxi Province, documented in the historical literature during the past 2700 years, are statistically significantly correlated with changes in temperature, and the relationship is a good example of the potential societal implications of temperature change on a regional scale.

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A chironomid-based salinity inference model from lakes on the Tibetan Plateau

Cited by 49 publications

References 50 publications

A 1000-year chironomid-based salinity reconstruction from varved sediments of Sugan Lake, Qaidam Basin, arid Northwest China, and its palaeoclimatic significance

A 1000-year chironomid-based salinity reconstruction from varved sediments of Sugan Lake, Qaidam Basin, arid Northwest China, and its palaeoclimatic significance

A chironomid-based mean July temperature inference model from the south-east margin of the Tibetan Plateau, China

A chironomid-based record of temperature variability during the past 4000 years in northern China and its possible societal implications

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