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Article: Biomarker records from lacustrine sediments, Larsemann Hills, East Antarctica

TitleBiomarker records from lacustrine sediments, Larsemann Hills, East Antarctica
东南极拉斯曼丘陵湖泊沉积生物标志物记录及其环境气候意义
Authors
KeywordsEast Antarctica
Larsemann Hills
Long chain alkenones
n-alkanes
Relative sea-level
Issue Date2012
PublisherKexue Chubanshe. The Journal's web site is located at http://journal.polar.gov.cn/
Citation
极地研究, 2012, v. 24 n. 3, p. 205-214 How to Cite?
Chinese Journal of Polar Research, 2012, v. 24 n. 3, p. 205-214 How to Cite?
Abstract东南极拉斯曼丘陵地区莫愁湖(69°22.3’ S,76°22.0’ E)沉积柱中的有机生物标志物记录了全新世中晚期该地区气候演变过程。不饱和长链烯酮在沉积柱111-76 cm (6450-5100 cal. yr. BP)和36-30 cm(3700-3500 cal. yr. BP)深度有检出,76 cm深度以上基本消失,表明该地区在5100 cal. yr. BP前后气候开始由冷转暖,冰川消融,陆壳抬升,相对海平面下降,同时大量的冰融水使湖泊逐渐淡化。沉积柱底部长链烯酮的检出阶段与东南极相对海平面较高时期相一致,而沉积柱36-30 cm(3700-3500 cal. yr. BP)深度不饱和长链烯酮的痕量检出则揭示了一个短暂的气候干冷,湖泊盐度升高的时期。沉积物中正构烷烃反映的当地气候变化所控制的湖生植物群落演变过程与上述过程基本一致。 Biomarker records from Mochou lake sediments, Larsemann Hills (69°22.3′S, 76°22.0′E), East Antarctica, reveals mid-late Holocene climate history in the region. . As biomarkers for a limited number of certain haptophytes, the long chain alkenones (LCAs) were found from bottom to 76 cm of the sediment core (6500-5100 cal. yr. BP), a period with high relative sea level. Trace amounts of LCAs were also found at 36-30 cm (3700-3500 cal. yr. BP), which reflected change of lake salinity caused by cold climate with fewer ice melt water and higher evaporation. The absence of LCAs above 76cm (about 5100 cal. yr. BP) was consistent with the climate switching from cold to warm and gradually dropping of relative sea level, resulting in more glacial melting water and less intrusion of sea water. The evolution of n-alkanes (C19-C33) reflected the same history of hygrophyte population.
Persistent Identifierhttp://hdl.handle.net/10722/185828
ISSN

 

DC FieldValueLanguage
dc.contributor.authorLiu, Yen_US
dc.contributor.authorLuo, Yen_US
dc.contributor.authorSun, Sen_US
dc.contributor.authorHe, Yen_US
dc.contributor.authorLiu, Zen_US
dc.contributor.authorSun, Len_US
dc.date.accessioned2013-08-20T11:43:00Z-
dc.date.available2013-08-20T11:43:00Z-
dc.date.issued2012en_US
dc.identifier.citation极地研究, 2012, v. 24 n. 3, p. 205-214en_US
dc.identifier.citationChinese Journal of Polar Research, 2012, v. 24 n. 3, p. 205-214en_US
dc.identifier.issn1007-7073-
dc.identifier.urihttp://hdl.handle.net/10722/185828-
dc.description.abstract东南极拉斯曼丘陵地区莫愁湖(69°22.3’ S,76°22.0’ E)沉积柱中的有机生物标志物记录了全新世中晚期该地区气候演变过程。不饱和长链烯酮在沉积柱111-76 cm (6450-5100 cal. yr. BP)和36-30 cm(3700-3500 cal. yr. BP)深度有检出,76 cm深度以上基本消失,表明该地区在5100 cal. yr. BP前后气候开始由冷转暖,冰川消融,陆壳抬升,相对海平面下降,同时大量的冰融水使湖泊逐渐淡化。沉积柱底部长链烯酮的检出阶段与东南极相对海平面较高时期相一致,而沉积柱36-30 cm(3700-3500 cal. yr. BP)深度不饱和长链烯酮的痕量检出则揭示了一个短暂的气候干冷,湖泊盐度升高的时期。沉积物中正构烷烃反映的当地气候变化所控制的湖生植物群落演变过程与上述过程基本一致。 Biomarker records from Mochou lake sediments, Larsemann Hills (69°22.3′S, 76°22.0′E), East Antarctica, reveals mid-late Holocene climate history in the region. . As biomarkers for a limited number of certain haptophytes, the long chain alkenones (LCAs) were found from bottom to 76 cm of the sediment core (6500-5100 cal. yr. BP), a period with high relative sea level. Trace amounts of LCAs were also found at 36-30 cm (3700-3500 cal. yr. BP), which reflected change of lake salinity caused by cold climate with fewer ice melt water and higher evaporation. The absence of LCAs above 76cm (about 5100 cal. yr. BP) was consistent with the climate switching from cold to warm and gradually dropping of relative sea level, resulting in more glacial melting water and less intrusion of sea water. The evolution of n-alkanes (C19-C33) reflected the same history of hygrophyte population.-
dc.languagechien_US
dc.publisherKexue Chubanshe. The Journal's web site is located at http://journal.polar.gov.cn/-
dc.relation.ispartof极地研究en_US
dc.relation.ispartofChinese Journal of Polar Researchen_US
dc.subjectEast Antarctica-
dc.subjectLarsemann Hills-
dc.subjectLong chain alkenones-
dc.subjectn-alkanes-
dc.subjectRelative sea-level-
dc.titleBiomarker records from lacustrine sediments, Larsemann Hills, East Antarcticaen_US
dc.title东南极拉斯曼丘陵湖泊沉积生物标志物记录及其环境气候意义en_US
dc.typeArticleen_US
dc.identifier.emailLiu, Z: zhliu@hku.hken_US
dc.identifier.authorityLiu, Z=rp00750en_US
dc.identifier.doi10.3724/SP.J.1084.2012.00205-
dc.identifier.hkuros219540en_US
dc.identifier.volume24en_US
dc.identifier.issue3-
dc.identifier.spage205en_US
dc.identifier.epage214en_US
dc.publisher.placeChina-

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