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Article: δ(13)C-δ(18)O covariance: an effective indicator of hydrological closure for lakes?

Titleδ(13)C-δ(18)O covariance: an effective indicator of hydrological closure for lakes?
Authors
KeywordsCarbonates
δ13 C-δ18 O covariance
Hydrological closure
Climatic pattern
Issue Date2008
PublisherWiley-Blackwell Publishing Asia.
Citation
Acta Geologica Sinica, 2008, v. 82 n. 5, p. 975-981 How to Cite?
AbstractThe correlation between the δ13 C and δ18 0 in primary carbonates is affected by several factors such as hydrological balance, total CO2 concentrations, climatic condition and lake productivity. The influence of these factors on the δ13 C-δ18 0 correlation may be different on different time scales. In this paper, two different-type lakes in southwestern China, Lake Erhai and Lake Chenghai, are selected to investigate the influence of climatic pattern on the δ13 C-δ18 0 correlation and to evaluate the reliability of the δ13 C-δ18 0 covariance as an indicator of hydrological closure. The results show that there exists good correlation between the δ13 C and δ18 0 in Lake Erhai (overflowing open lake) and in Lake Chenghai (closed lake). This suggests that the δ13 C-δ18 0 covariance may be not an effective indicator of hydrological closure for lakes, especially on short time scales. On the one hand, a hydrologically open lake may display covariant δ13 C and δ18 0 as a result of climatic influence. The particular alternate warm-dry and cold-wet climatic pattern in southwestern China may be the principal cause of the δ13 C-δ18 0 covariance in Lake Erhai and Lake Chenghai. On the other hand, a hydrologically closed lake unnecessarily displays covariant trends between δ13 C and δ18 O because of the buffering effect of high CO2 concentration on the δ13 C shift in hyper-alkaline lakes. We should be prudent when we use the covariance between δ13 C and δ18 O to judge the hydrological closure of lake.
Persistent Identifierhttp://hdl.handle.net/10722/125607
ISSN
2015 Impact Factor: 1.996

 

DC FieldValueLanguage
dc.contributor.authorChen, Jen_HK
dc.contributor.authorWang, Fen_HK
dc.contributor.authorWan, Gen_HK
dc.contributor.authorTang, Den_HK
dc.contributor.authorZhang, DDen_HK
dc.contributor.authorHuang, Ren_HK
dc.contributor.authorLi, Jen_HK
dc.contributor.authorXiao, Ten_HK
dc.date.accessioned2010-10-31T11:41:06Z-
dc.date.available2010-10-31T11:41:06Z-
dc.date.issued2008en_HK
dc.identifier.citationActa Geologica Sinica, 2008, v. 82 n. 5, p. 975-981en_HK
dc.identifier.issn1000-9515en_HK
dc.identifier.urihttp://hdl.handle.net/10722/125607-
dc.description.abstractThe correlation between the δ13 C and δ18 0 in primary carbonates is affected by several factors such as hydrological balance, total CO2 concentrations, climatic condition and lake productivity. The influence of these factors on the δ13 C-δ18 0 correlation may be different on different time scales. In this paper, two different-type lakes in southwestern China, Lake Erhai and Lake Chenghai, are selected to investigate the influence of climatic pattern on the δ13 C-δ18 0 correlation and to evaluate the reliability of the δ13 C-δ18 0 covariance as an indicator of hydrological closure. The results show that there exists good correlation between the δ13 C and δ18 0 in Lake Erhai (overflowing open lake) and in Lake Chenghai (closed lake). This suggests that the δ13 C-δ18 0 covariance may be not an effective indicator of hydrological closure for lakes, especially on short time scales. On the one hand, a hydrologically open lake may display covariant δ13 C and δ18 0 as a result of climatic influence. The particular alternate warm-dry and cold-wet climatic pattern in southwestern China may be the principal cause of the δ13 C-δ18 0 covariance in Lake Erhai and Lake Chenghai. On the other hand, a hydrologically closed lake unnecessarily displays covariant trends between δ13 C and δ18 O because of the buffering effect of high CO2 concentration on the δ13 C shift in hyper-alkaline lakes. We should be prudent when we use the covariance between δ13 C and δ18 O to judge the hydrological closure of lake.-
dc.languageengen_HK
dc.publisherWiley-Blackwell Publishing Asia.en_HK
dc.relation.ispartofActa Geologica Sinicaen_HK
dc.rightsThe definitive version is available at www3.interscience.wiley.com-
dc.subjectCarbonates-
dc.subjectδ13 C-δ18 O covariance-
dc.subjectHydrological closure-
dc.subjectClimatic pattern-
dc.titleδ(13)C-δ(18)O covariance: an effective indicator of hydrological closure for lakes?en_HK
dc.typeArticleen_HK
dc.identifier.emailZhang, DD: zhangd@hkucc.hku.hken_HK
dc.identifier.authorityZhang, DD=rp00649en_HK
dc.identifier.doi10.1111/j.1755-6724.2008.tb00653.x-
dc.identifier.hkuros175671en_HK
dc.identifier.volume82en_HK
dc.identifier.issue5en_HK
dc.identifier.spage975en_HK
dc.identifier.epage981en_HK
dc.publisher.placeAustralia-
dc.customcontrol.immutablesml 130423-

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