globalchange  > 气候减缓与适应
DOI: 10.1016/j.quascirev.2018.05.027
Scopus记录号: 2-s2.0-85047351711
论文题名:
Insolation forcing of coccolithophore productivity in the North Atlantic during the Middle Pleistocene
作者: Cavaleiro C.; Voelker A.H.L.; Stoll H.; Baumann K.-H.; Kulhanek D.K.; Naafs B.D.A.; Stein R.; Grützner J.; Ventura C.; Kucera M.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2018
卷: 191
起始页码: 318
结束页码: 336
语种: 英语
英文关键词: Coccolithophores ; Glacials ; Insolation ; North Atlantic ; Paleoproductivity ; Pleistocene
Scopus关键词: Carbon ; Glacial geology ; Incident solar radiation ; Oceanography ; Spectrum analysis ; Coccolithophores ; Glacials ; North Atlantic ; Paleoproductivity ; Pleistocene ; Productivity ; biological pump ; carbon cycle ; carbonate system ; climate forcing ; coccolith ; experimental study ; glacial environment ; glacial-interglacial cycle ; growth rate ; insolation ; isotopic ratio ; marine isotope stage ; marine sediment ; Ocean Drilling Program ; oceanic circulation ; paleoproductivity ; Pleistocene ; temperature effect ; Atlantic Ocean ; Atlantic Ocean (North) ; Haptophyceae
英文摘要: Coccolithophores play a key role in the oceanic carbon cycle through the biological and carbonate pumps. Understanding controls on coccolithophore productivity is thus fundamental to quantify oceanic carbon cycling. We investigate changes in coccolithophore productivity over several Pleistocene glacial-interglacial cycles using a high-resolution coccolith Sr/Ca ratio record, which is an indicator of growth rate and thus a proxy for coccolithophore productivity. We use Middle Pleistocene sediments from the North Atlantic Integrated Ocean Drilling Program (IODP) Site U1313 (41.00′ N, 32.58’ W) spanning Marine Isotopic Stages 16 to 10 (638–356 kyr). The location of the record allows us to investigate processes affecting productivity in a mid-latitude setting and to unravel the effects of temperature and regional ocean circulation. Coccolithophore productivity shows a dominant glacial-interglacial cyclicity with higher productivity during glacials, which appears to reflect the southward migration of the North Atlantic high productivity zone currently located between 45° and 55° N. Spectral analysis of the productivity record reveals a suborbital variability consistent with forcing by insolation maxima superimposed on the front migration pattern. Similar to today, coccolithophore productivity during interglacials was enhanced when insolation was at its maximum in spring or in autumn, whereas during glacials, productivity was enhanced when summer/autumn insolation was at its maximum. We show that in the studied region, coccolithophore productivity was driven by processes reflecting regional insolation. Applying this information to model experiments is required to assess if coccolithophore productivity played a significant role in past changes of atmospheric CO2. © 2018 Elsevier Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112168
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作者单位: University of Bremen, MARUM - Center for Marine and Environmental Sciences, Leobener Straße28359, Germany; IPMA – Instituto Português do Mar e da Atmosfera, Divisão de Geologia Marinha e Georrecursos Marinhos, Rua Alfredo Magalhães Ramalho 6, Lisboa, 1495-006, Portugal; CCMAR, Centro de Ciências do Mar, Universidade do Algarve, Campus de Gambelas, Faro, 8005-139, Portugal; Geology Department, University of Oviedo, C/. Jesús Arias de Velasco s/n, Oviedo, 33005, Spain; University of Bremen, Geosciences Department, Klagenfurter Straße, Bremen, 28359, Germany; International Ocean Discovery Program, Texas A&M University, College Station, TX 77845-9547, United States; Organic Geochemistry Unit, School of Chemistry, Cabot Institute, University of Bristol, Cantock's Close, Bristol, BS8 1TS, United Kingdom; Alfred-Wegener Institute for Polar and Marine Research, Am Alten Hafen 26, Bremerhaven, 27568, Germany

Recommended Citation:
Cavaleiro C.,Voelker A.H.L.,Stoll H.,et al. Insolation forcing of coccolithophore productivity in the North Atlantic during the Middle Pleistocene[J]. Quaternary Science Reviews,2018-01-01,191
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