Sea surface temperature reconstructions over the last 70 kyr off Portugal: Biomarker data and regional modeling
作者： Sophie Darfeuil , Guillemette Ménot , Xavier Giraud , Frauke Rostek , Kazuyo Tachikawa
DOI: 10.1002/2015PA002831
关键词:
摘要: This study aims at providing robust temperature reconstructions for a key oceanographic setting in the North Atlantic and understanding nature of signal recorded by two biomarkers U-37(k) TEX86, considering season depth production. To do so, high-resolution signals TEX86 are determined last 70kyr core MD95-2042, located off Portugal. Signals present tight correlation, demonstrating dominant effect. correspond well to annual mean sea surface (SST), whereas TEX86H-derived temperatures 5.6 degrees C higher, which is unrealistically warm this area. Unsuitable global linear calibrations on Iberian Margin may suggest possible occurrence archaeal communities with specific response. assess impact different or production sediment, modeled proxies (Tproxies) introduced Regional Oceanic Modeling System tested seasons (annual/summer/winter) depths (surface 0-200m) three climate modes (Present Day (PD), Last Glacial Maximum (LGM), Heinrich Stadials (HS)). Similar amplitudes between found MD95-2042 site observations, both biomarkers, Tproxy: 5.5-7 T(PD-LGM) 3-4 T(LGM-HS). Therefore, we propose new TEX86H regional calibration reconstruct past SSTs Margin.
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sci-hub.se 参考文章(183)
Y. Ternois, M.-A. Sicre, A. Boireau, M.H. Conte, G. E, Evaluation of long-chain alkenones as paleo-temperature indicators in the Mediterranean Sea Deep Sea Research Part I: Oceanographic Research Papers. ,vol. 44, pp. 271- 286 ,(1997) , 10.1016/S0967-0637(97)89915-3
Edouard Bard, Maurice Arnold, Pierre Maurice, Josette Duprat, Jean Moyes, Jean-Claude Duplessy, Retreat velocity of the North Atlantic polar front during the last deglaciation determined by 14 C accelerator mass spectrometry Nature. ,vol. 328, pp. 791- 794 ,(1987) , 10.1038/328791A0
Edward M. Armstrong, Jorge Vazquez-Cuervo, A new global satellite-based sea surface temperature climatology Geophysical Research Letters. ,vol. 28, pp. 4199- 4202 ,(2001) , 10.1029/2001GL013316
Didier Swingedouw, Juliette Mignot, Pascale Braconnot, Eloi Mosquet, Masa Kageyama, Ramdane Alkama, Impact of Freshwater Release in the North Atlantic under Different Climate Conditions in an OAGCM Journal of Climate. ,vol. 22, pp. 6377- 6403 ,(2009) , 10.1175/2009JCLI3028.1
I.T. Marlowe, J.C. Green, A.C. Neal, S.C. Brassell, G. Eglinton, P.A. Course, Long chain (n-C37–C39) alkenones in the Prymnesiophyceae. Distribution of alkenones and other lipids and their taxonomic significance European Journal of Phycology. ,vol. 19, pp. 203- 216 ,(1984) , 10.1080/00071618400650221
Guillemette Ménot, Edouard Bard, A precise search for drastic temperature shifts of the past 40,000 years in southeastern Europe Paleoceanography. ,vol. 27, pp. n/a- n/a ,(2012) , 10.1029/2012PA002291
Y. Ternois, K. Kawamura, N. Ohkouchi, L. Keigwin, Alkenone sea surface temperature in the Okhotsk Sea for the last 15 kyr Geochemical Journal. ,vol. 34, pp. 283- 293 ,(2000) , 10.2343/GEOCHEMJ.34.283
Lise Sanchi, Guillemette Ménot, Edouard Bard, An automated purification method for archaeal and bacterial tetraethers in soils and sediments Organic Geochemistry. ,vol. 54, pp. 83- 90 ,(2013) , 10.1016/J.ORGGEOCHEM.2012.10.005
Carme Huguet, Jung-Hyun Kim, Gert J. de Lange, Jaap S. Sinninghe Damsté, Stefan Schouten, Effects of long term oxic degradation on the , TEX86 and BIT organic proxies Organic Geochemistry. ,vol. 40, pp. 1188- 1194 ,(2009) , 10.1016/J.ORGGEOCHEM.2009.09.003
Andreas Basse, Chun Zhu, Gerard J.M. Versteegh, Gerhard Fischer, Kai-Uwe Hinrichs, Gesine Mollenhauer, Distribution of intact and core tetraether lipids in water column profiles of suspended particulate matter off Cape Blanc, NW Africa Organic Geochemistry. ,vol. 72, pp. 1- 13 ,(2014) , 10.1016/J.ORGGEOCHEM.2014.04.007