Long-chain alkenone distributions and temperature dependence in lacustrine surface sediments from China

Chu, Guoqiang; Sun, Qing; Li, Shengqiang; Zheng, Mianping; Jia, Xinxian; Lü, Caifen; Liu, Jiaqi; Liu, Tungsheng

doi:10.1016/j.gca.2005.04.008

Cited by 108 publications

(137 citation statements)

References 92 publications

(205 reference statements)

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“…Alternatively, the small variations in the C 37 / C 38 ratio could also be the effect of species' variability within open marine haptophytes (Conte et al, 1998). In contrast to previous laboratory and field studies (Ono et al, 2009;Chu et al, 2005), we do not find a correlation between salinity and the C 37 / C 38 ratio (not shown here).…”

Section: Alkenone Sourcescontrasting

confidence: 99%

Testing the D / H ratio of alkenones and palmitic acid as salinity proxies in the Amazon Plume

Häggi

Chiessi²,

Schefuß

2015

Biogeosciences

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Abstract. The stable hydrogen isotope composition of lipid biomarkers, such as alkenones, is a promising new tool for the improvement of palaeosalinity reconstructions. Laboratory studies confirmed the correlation between lipid biomarker δD composition (δD Lipid ), water δD composition (δD H 2 O ) and salinity; yet there is limited insight into the applicability of this proxy in oceanic environments. To fill this gap, we test the use of the δD composition of alkenones (δD C 37 ) and palmitic acid (δD PA ) as salinity proxies using samples of surface suspended material along the distinct salinity gradient induced by the Amazon Plume. Our results indicate a positive correlation between salinity and δD H 2 O , while the relationship between δD H 2 O and δD Lipid is more complex: δD PA correlates strongly with δD H 2 O (r 2 = 0.81) and shows a salinity-dependent isotopic fractionation factor. δD C 37 only correlates with δD H 2 O in a small number (n = 8) of samples with alkenone concentrations > 10 ng L −1 , while there is no correlation if all samples are taken into account. These findings are mirrored by alkenone-based temperature reconstructions, which are inaccurate for samples with low alkenone concentrations. Deviations in δD C 37 and temperature are likely to be caused by limited haptophyte algae growth due to low salinity and light limitation imposed by the Amazon Plume. Our study confirms the applicability of δD Lipid as a salinity proxy in oceanic environments. But it raises a note of caution concerning regions where low alkenone production can be expected due to low salinity and light limitation, for instance, under strong riverine discharge.

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Section: Alkenone Sourcescontrasting

confidence: 99%

Testing the D / H ratio of alkenones and palmitic acid as salinity proxies in the Amazon Plume

Häggi

Chiessi²,

Schefuß

2015

Biogeosciences

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“…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: 93%

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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“…doi:10. /j.orggeochem.2007 have led to numerous studies of alkenone distributions and their relationship with temperature in limnic environments (Li et al, 1996;Thiel et al, 1997;Innes et al, 1998;Sheng et al, 1998;Wang and Zheng, 1998;Zink et al, 2001;Sun et al, 2004;Chu et al, 2005;D'Andrea and Huang, 2005;Theissen et al, 2005;Liu et al, 2006). Studies of the marine environment indicate that the U K 0 37 temperature relationships for the species C. lamellosa, I. galbana, E. huxleyi and G. oceanica differ significantly from each other (Marlowe et al, 1984;Brassell, 1993;Volkman et al, 1995;Sawada et al, 1996;Conte et al, 1998;Epstein et al, 1998Epstein et al, , 2001Yamamoto et al, 2000;Versteegh et al, 2001;Prahl et al, 2006a,b).…”

Section: Introductionmentioning

confidence: 99%

“…Earlier studies (e.g., Cranwell, 1985;Li et al, 1996;Zink et al, 2001;Chu et al, 2005) could not find algal precursors for the long chain alkenones (LCKs) in lakes because of low abundance of such organisms, high algal diversity and seasonal variability in algal assemblages. We chose Lake Xiarinur, which has the highest LCK content of surface sediments among the studied lakes in China (Chu et al, 2005), as a target for tracing alkenone producer organism(s).…”

Section: Introductionmentioning

confidence: 99%

Calibration of alkenone unsaturation index with growth temperature for a lacustrine species, Chrysotila lamellosa (Haptophyceae)

Sun¹,

Chu

Liu

et al. 2007

Organic Geochemistry

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Long-chain alkenone distributions and temperature dependence in lacustrine surface sediments from China

Cited by 108 publications

References 92 publications

Testing the D / H ratio of alkenones and palmitic acid as salinity proxies in the Amazon Plume

Testing the D / H ratio of alkenones and palmitic acid as salinity proxies in the Amazon Plume

Solar influenced late Holocene temperature changes on the northern Tibetan Plateau

Calibration of alkenone unsaturation index with growth temperature for a lacustrine species, Chrysotila lamellosa (Haptophyceae)

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