globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2013.09.023
论文题名:
Productivity modes in the mediterranean sea during dansgaard-oeschger (20,000-70,000yr ago) oscillations
作者: Incarbona A.; Sprovieri M.; Di Stefano A.; Di Stefano E.; Salvagio Manta D.; Pelosi N.; Ribera d'Alcalà M.; Sprovieri R.; Ziveri P.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2013
卷: 392
起始页码: 128
结束页码: 137
语种: 英语
英文关键词: Coccolithophores ; Dansgaard-Oeschger ; Mediterranean ; Paleoproductivity ; Planktonic Foraminifera
英文摘要: The study of planktonic organisms during abrupt climatic variations of the last glacial period (Dansgaard-Oeschger oscillations, D-O) may reveal important insights on climatic, oceanographic and biological interactions. Here we present planktic foraminifera and coccolithophore data collected at the Ocean Drilling Program Site 963 (Sicily Channel), with a mean sampling resolution of respectively 43.5 and 98.9. yr, over the interval between 70,000 and 20,000. yr ago. The paleoenvironmental reconstruction suggests that three different scenarios can be seen across each D-O cycle: 1. oligotrophic surface water and a deep thermocline for the early Interstadials; 2. a Deep Chlorophyll Maximum and coccolithophore winter/spring blooming in the late Interstadials; 3. reduced productivity together with the shallowing of the nutricline depth during Stadials and Heinrich events. The unique mode of productivity dynamics is corroborated by comparing our paleoecological results with those published from high-resolution cores in the Alboran Sea clearly indicating reduced trophic levels during Stadials and Heinrich events. Finally, we argue that the density contrast between the Atlantic water inflow and subsurface water may have affected productivity dynamics in such a large area. The strong vertical density gradient may have hampered the vertical convection of the water column, producing a negative effect on biological productivity, especially during Stadial phases. © 2013 Elsevier B.V.
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被引频次[WOS]:22   [查看WOS记录]     [查看WOS中相关记录]
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69524
Appears in Collections:过去全球变化的重建

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作者单位: Università degli Studi di Palermo, Dipartimento di Scienze della Terra e del Mare, Via Archirafi 22, 90134 Palermo, Italy; Consiglio Nazionale delle Ricerche, Istituto per l'Ambiente Marino Costiero U.O. Capo Granitola, Via del Mare 3, 91021 Torretta Granitola (Campobello di Mazara Trapani, Italy; Università di Catania, Dipartimento di Scienze Geologiche, Corso Italia 55, 95129 Catania, Italy; Consiglio Nazionale delle Ricerche, Istituto per l'Ambiente Marino Costiero, Calata Porta di Massa, Interno Porto di Napoli, 80133 Naples, Italy; Laboratorio di Oceanografia Biologica, Stazione Zoologica 'A. Dohrn', Villa Comunale, Naples, Italy; Universitat Autònoma de Barcelona (UAB), Institute of Environmental Science and Technology (ICTA), Edifici Cn Campus de la UAB, 08193 Bellaterra (Cerdanyola del Vallès), Barcelona, Spain; Vrjie Universiteit Amsterdam, Department of Earth Sciences, Faculty of Earth and Life Sciences, de Boelelaan 1085, 1081HV Amsterdam, Netherlands

Recommended Citation:
Incarbona A.,Sprovieri M.,Di Stefano A.,et al. Productivity modes in the mediterranean sea during dansgaard-oeschger (20,000-70,000yr ago) oscillations[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2013-01-01,392
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