High-frequency climate fluctuations over the last deglaciation in the Alboran Sea, Western Mediterranean: Evidence from calcareous plankton assemblages
作者： Pietro Bazzicalupo , Patrizia Maiorano , Angela Girone , Maria Marino , Nathalie Combourieu-Nebout
DOI: 10.1016/J.PALAEO.2018.06.042
关键词:
摘要: Abstract A high resolution study, with a centennial scale resolution, has been performed on the calcareous plankton assemblage (coccolithophores and planktonic foraminifera) at Ocean Drilling Program Site 976, Alboran Sea (Western Mediterranean), focusing interval between 20 9 ka, in order to reconstruct changes surface subsurface water dynamics productivity. The biotic proxies integrate extremely detailed (multi-decadal scale) geochemical data set pollen record already available core, thus providing complete paleoenvironmental/paleoceanographic reconstruction. results highlight sensitivity of recording stadial/interstadial phases higher-frequency climatic events, that produced sea features. Wind-induced upwelling river discharge during Last Glacial Period favored nutrient availability moderate During Heinrich Stadial 1 (HS1), arrival cold fresher waters from iceberg melting North Atlantic, significantly hampered productivity, its lowest values whole investigated interval. Calcareous behavior supports hypothesis HS1 is composite event, marked by three phases: HS1a characterized coldest SST, polar Atlantic inflow into basin first step toward dry climate continent; HS1b enhanced freshwater drought land, HS1c indicating reduced influx. Bolling-Allerod (BA) interstadial sees highest rate productivity entire accompanies deposition Organic Rich Layer 1; BA coccolithophore also marks higher frequency hydrographic conditions, apparently relation Greenland Interstadial I (GI-I) variability. Younger Dryas (YD) refunding although not as severe HS1, detrital input drier conditions land. Holocene onset records amelioration both marine continental environment, BA. rapid shifts sensitive taxa support each phases-subphases complex pattern forced strong interaction ice-sheet instability, meltwater entering Gibraltar Strait, westerlies moisture availability, clearly impacting over temperature, land masses.
harvard.edu
archives-ouvertes.fr
sci-hub.se 参考文章(181)
Filipa Naughton, Teresa Drago, Maria Fernanda Sanchez-Goñi, Maria Conceição Freitas, Climate Variability in the North-Western Iberian Peninsula During the Last Deglaciation Springer, Dordrecht. pp. 1- 22 ,(2011) , 10.1007/978-90-481-9821-4_1
Luc Beaufort, Franck Bassinot, Edith Vincent, PRIMARY PRODUCTION RESPONSE TO ORBITALLY INDUCED VARIATIONS OF THE SOUTHERN OSCILLATION IN THE EQUATORIAL INDIAN OCEAN RECONSTRUCTING OCEAN HISTORY: A WINDOW INTO THE FUTURE. pp. 245- 271 ,(1999) , 10.1007/978-1-4615-4197-4_15
Christoph Hemleben, Michael Spindler, O Roger Anderson, Christoph Hemleben, Michael Spindler, O Roger Anderson, Taxonomy and Species Features Modern Planktonic Foraminifera. pp. 8- 32 ,(1989) , 10.1007/978-1-4612-3544-6_2
M Carmen Álvarez, F Ornella Amore, Lluïsa Cros, Belén Alonso, Javier Alcántara-Carrió, None, Coccolithophore biogeography in the Mediterranean Iberian margin Revista española de micropaleontología. ,vol. 42, pp. 359- 371 ,(2010)
Aurea Narciso, José-Abel Flores, Mário Cachao, Francisco Javier Sierro, Elena Colmenero-Hidalgo, Andrea Piva, Alessandra Asioli, None, Sea surface dynamics and coccolithophore behaviour during sapropel deposition of Marine Isotope Stages 7,6 and 5 in Western Adriatic sea Revista española de micropaleontología. ,vol. 42, pp. 345- 358 ,(2010)
M. Rodrigo-Gámiz, F. Martínez-Ruiz, M. Chiaradia, F.J. Jiménez-Espejo, D. Ariztegui, Radiogenic isotopes for deciphering terrigenous input provenance in the western Mediterranean Chemical Geology. ,vol. 410, pp. 237- 250 ,(2015) , 10.1016/J.CHEMGEO.2015.06.004
Samuel Toucanne, Guillaume Soulet, Nicolas Freslon, Ricardo Silva Jacinto, Bernard Dennielou, Sébastien Zaragosi, Frédérique Eynaud, Jean-François Bourillet, Germain Bayon, Millennial-scale fluctuations of the European Ice Sheet at the end of the last glacial, and their potential impact on global climate Quaternary Science Reviews. ,vol. 123, pp. 113- 133 ,(2015) , 10.1016/J.QUASCIREV.2015.06.010
Michael Vellinga, Richard A. Wood, Global Climatic Impacts of a Collapse of the Atlantic Thermohaline Circulation Climatic Change. ,vol. 54, pp. 251- 267 ,(2002) , 10.1023/A:1016168827653
Frédérique Eynaud, Lúcia de Abreu, Antje Voelker, Joachim Schönfeld, Emilia Salgueiro, Jean-Louis Turon, Aurélie Penaud, Samuel Toucanne, Filipa Naughton, María Fernanda Sánchez Goñi, Bruno Malaizé, Isabel Cacho, Position of the Polar Front along the western Iberian margin during key cold episodes of the last 45 ka Geochemistry Geophysics Geosystems. ,vol. 10, ,(2009) , 10.1029/2009GC002398
Cyril Moulin, Claude E. Lambert, François Dulac, Uri Dayan, Control of atmospheric export of dust from North Africa by the North Atlantic Oscillation Nature. ,vol. 387, pp. 691- 694 ,(1997) , 10.1038/42679