| DOI: | 10.1016/j.quascirev.2013.03.005
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| Scopus记录号: | 2-s2.0-84876328010
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| 论文题名: | Climate mediated size variability of diatom Fragilariopsis kerguelensis in the Southern Ocean |
| 作者: | Shukla S.K.; Crosta X.; Cortese G.; Nayak G.N.
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| 刊名: | Quaternary Science Reviews
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| ISSN: | 2773791
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| 出版年: | 2013
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| 卷: | 69 | | 起始页码: | 49
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| 结束页码: | 58
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| 语种: | 英语
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| 英文关键词: | Biometry
; Diatoms
; Environmental conditions
; Nutrient cycling
; Paleoceanography
; Southern Ocean
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| Scopus关键词: | Biometry
; Diatoms
; Environmental conditions
; Nutrient cycling
; Paleoceanography
; Southern ocean
; Glacial geology
; Nutrients
; Sea ice
; Oceanography
; biometry
; circumpolar current
; climate variation
; diatom
; environmental conditions
; eolian process
; glacial-interglacial cycle
; Holocene
; last deglaciation
; marine sediment
; nutrient cycling
; opal
; open ocean
; paleoceanography
; paleocurrent
; sea ice
; sediment core
; size distribution
; subantarctic region
; upwelling
; Antarctic Peninsula
; Antarctica
; Atlantic Sector
; Indian Sector
; Southern Ocean
; West Antarctica
; Bacillariophyta
; Fragilariopsis kerguelensis
; Meara
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| 英文摘要: | Fragilariopsis kerguelensis (O'Meara) Hustedt is the most abundant open ocean diatom species in Southern Ocean sediments and its average valve area has recently been used to infer glacial-interglacial paleoceanographic conditions. Studies from the Atlantic sector of the Southern Ocean demonstrated how larger average valve area of F. kerguelensis during the Last Glacial compared to the interglacial possibly relate to greater availability of iron (through wider sea ice coverage and higher eolian dust input). We present here data on average valve area of F. kerguelensis from three sediment cores covering the last ~42calkaBP from different zones of the Southern Ocean. Our records confirm previous results from the Atlantic sector, but highlight a different pattern from the Indian sector where the largest valves of F. kerguelensis are encountered during the Holocene. Fragilariopsis kerguelensis average valve area variations in the Antarctic Polar Front (APF) of the Atlantic sector and Subantarctic Front of the Indian sector are in phase with records of opal burial while this correlation does not hold for the APF of the Indian sector. Variations in circum-polar upwelling were suggested as the main controlling factor of opal production during the last 20,000 years. We here hypothesize that high nutrient input from the Antarctic Peninsula during the last deglaciation may have exerted a stronger control on F. kerguelensis average valve area and opal export in the Atlantic sector of the Southern Ocean than inferred changes in circum-polar upwelling. © 2013 Elsevier Ltd. |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/60638
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| Appears in Collections: | 过去全球变化的重建
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作者单位: | Department of Marine Sciences, Goa University, Goa 403 206, India; UMR-CNRS 5805 EPOC, Université Bordeaux 1, Avenue des Facultés, 33405 Talence Cedex, France; GNS Science, Lower Hutt, New Zealand
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| Recommended Citation: | |
Shukla S.K.,Crosta X.,Cortese G.,et al. Climate mediated size variability of diatom Fragilariopsis kerguelensis in the Southern Ocean[J]. Quaternary Science Reviews,2013-01-01,69
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