File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Distribution of the C37 tetra-unsaturated alkenone in Lake Qinghai, China: A potential lake salinity indicator

TitleDistribution of the C37 tetra-unsaturated alkenone in Lake Qinghai, China: A potential lake salinity indicator
Authors
Issue Date2008
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/gca
Citation
Geochimica Et Cosmochimica Acta, 2008, v. 72 n. 3, p. 988-997 How to Cite?
AbstractThe alkenone unsaturation index UK′ 37 has been applied to reconstruct past temperature changes in both marine and lacustrine systems. However, few studies have addressed whether the relative abundance of the C37:4 alkenone to the total C37 production (%C37:4) can reflect surface salinity changes in lacustrine systems. Here we present long-chain C37 alkenone distribution patterns in surface sediments from Lake Qinghai, China. Surface sediments were sampled over a large range of surface salinity changes (1.7-25 g/l) within Lake Qinghai and its surrounding lakes, while temperature differences at these sampling locations should be relatively small. We have found that %C37:4 varies from 15% to 49% as surface salinity decreases. We tentatively describe this %C37:4-salinity link with a general linear regression: %C37:4 = 53.4 (±7.8) - 1.73 (±0.45) × S (n = 28, r2 = 0.62), although step-wise %C37:4 changes in response to salinity variation may exist. UK′ 37 values vary between 0.10 and 0.16 at these sites and the inferred range of lake water temperature changes is ∼2-3 °C, suggesting that UK′ 37 largely reflects temperature signal across a large salinity range, consistent with previous findings that UK′ 37 can indicate temperature changes over a large diversity of environmental settings. We have also found that UK′ 37 values are correlated with salinity changes (r2 = 0.4), and thus cannot exclude potential temperature effect on %C37:4 and salinity effect on UK′ 37 in this study. However, even extreme estimates of temperature differences within the lake are still unable to explain the observed %C37:4 changes. We therefore suggest that %C37:4 could be used to infer past lake salinity changes at a regional scale. © 2007 Elsevier Ltd. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/151234
ISSN
2015 Impact Factor: 4.315
2015 SCImago Journal Rankings: 3.016
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorLiu, Wen_US
dc.contributor.authorLiu, Zen_US
dc.contributor.authorFu, Men_US
dc.contributor.authorAn, Zen_US
dc.date.accessioned2012-06-26T06:19:04Z-
dc.date.available2012-06-26T06:19:04Z-
dc.date.issued2008en_US
dc.identifier.citationGeochimica Et Cosmochimica Acta, 2008, v. 72 n. 3, p. 988-997en_US
dc.identifier.issn0016-7037en_US
dc.identifier.urihttp://hdl.handle.net/10722/151234-
dc.description.abstractThe alkenone unsaturation index UK′ 37 has been applied to reconstruct past temperature changes in both marine and lacustrine systems. However, few studies have addressed whether the relative abundance of the C37:4 alkenone to the total C37 production (%C37:4) can reflect surface salinity changes in lacustrine systems. Here we present long-chain C37 alkenone distribution patterns in surface sediments from Lake Qinghai, China. Surface sediments were sampled over a large range of surface salinity changes (1.7-25 g/l) within Lake Qinghai and its surrounding lakes, while temperature differences at these sampling locations should be relatively small. We have found that %C37:4 varies from 15% to 49% as surface salinity decreases. We tentatively describe this %C37:4-salinity link with a general linear regression: %C37:4 = 53.4 (±7.8) - 1.73 (±0.45) × S (n = 28, r2 = 0.62), although step-wise %C37:4 changes in response to salinity variation may exist. UK′ 37 values vary between 0.10 and 0.16 at these sites and the inferred range of lake water temperature changes is ∼2-3 °C, suggesting that UK′ 37 largely reflects temperature signal across a large salinity range, consistent with previous findings that UK′ 37 can indicate temperature changes over a large diversity of environmental settings. We have also found that UK′ 37 values are correlated with salinity changes (r2 = 0.4), and thus cannot exclude potential temperature effect on %C37:4 and salinity effect on UK′ 37 in this study. However, even extreme estimates of temperature differences within the lake are still unable to explain the observed %C37:4 changes. We therefore suggest that %C37:4 could be used to infer past lake salinity changes at a regional scale. © 2007 Elsevier Ltd. All rights reserved.en_US
dc.languageengen_US
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/gcaen_US
dc.relation.ispartofGeochimica et Cosmochimica Actaen_US
dc.titleDistribution of the C37 tetra-unsaturated alkenone in Lake Qinghai, China: A potential lake salinity indicatoren_US
dc.typeArticleen_US
dc.identifier.emailLiu, Z:zhliu@hku.hken_US
dc.identifier.authorityLiu, Z=rp00750en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1016/j.gca.2007.11.016en_US
dc.identifier.scopuseid_2-s2.0-38349042179en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-38349042179&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume72en_US
dc.identifier.issue3en_US
dc.identifier.spage988en_US
dc.identifier.epage997en_US
dc.identifier.isiWOS:000252662000019-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridLiu, W=35734284300en_US
dc.identifier.scopusauthoridLiu, Z=16177844800en_US
dc.identifier.scopusauthoridFu, M=49260933400en_US
dc.identifier.scopusauthoridAn, Z=7102765876en_US

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats