Monsoon variability and upper ocean stratification during the last ∼66 ka over the Andaman Sea: Inferences from the δ18O records of planktonic foraminifera
作者： P Kiran Kumar , Shraddha T Band , R Ramesh , Neeraj Awasthi , None
DOI: 10.1016/J.QUAINT.2018.03.025
关键词: Foraminifera 、 Globorotalia menardii 、 Last Glacial Maximum 、 Geology 、 Globigerinoides 、 Oceanography 、 δ18O 、 Stratification (water) 、 Holocene 、 Monsoon
摘要: Abstract Using new oxygen isotope (δ18O) data of three planktonic foraminiferal (Globigerinoides ruber, Globigerinoides sacculifer and Globorotalia menardii) species from a sediment core SK-234-60, collected the Andaman Sea, we infer that summer monsoon was weaker during Marine Isotopic Stage-3 (MIS-3) than early Holocene but stronger MIS-2. Further, an abrupt decrease in mid-Holocene between ∼7 4.5 ka is observed. The difference δ18O with different habitats depth also enables reconstruction past ocean stratification over Sea. Distinct weak strong freshwater-induced upper stratifications are observed last ∼66 ka. A Last Glacial Maximum (LGM) This due to prevailing positive negative Evaporation minus Precipitation (E-P) conditions, respectively. Weaker ∼32 mid-MIS-3 observed, whereas ∼42-39 Stronger associated higher seen ∼62 Likewise, Heinrich events stratification.
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sci-hub.se 参考文章(57)
V. Subramanian, The sediment load of Indian rivers - an update ,(2009)
Pallavi Anand, Dick Kroon, Arun Deo Singh, Raja S. Ganeshram, Gerald Ganssen, Henry Elderfield, Coupled sea surface temperature–seawater δ18O reconstructions in the Arabian Sea at the millennial scale for the last 35 ka Paleoceanography. ,vol. 23, ,(2008) , 10.1029/2007PA001564
Aleksey Sadekov, Stephen M. Eggins, Patrick De Deckker, Ulysses Ninnemann, Wolfgang Kuhnt, Franck Bassinot, Surface and subsurface seawater temperature reconstruction using Mg/Ca microanalysis of planktonic foraminifera Globigerinoides ruber, Globigerinoides sacculifer, and Pulleniatina obliquiloculata Paleoceanography. ,vol. 24, ,(2009) , 10.1029/2008PA001664
Adukkam V Sijinkumar, Bejugam N Nath, Medimi VS Guptha, Syed M Ahmad, Bandaru R Rao, None, Timing and preservation mechanism of deglacial pteropod spike from the Andaman Sea, northeastern Indian Ocean Boreas. ,vol. 44, pp. 432- 444 ,(2015) , 10.1111/BOR.12099
Gaudenz Deplazes, Andreas Lückge, Jan-Berend W. Stuut, Jürgen Pätzold, Holger Kuhlmann, Dorothée Husson, Mara Fant, Gerald H. Haug, Weakening and strengthening of the Indian monsoon during Heinrich events and Dansgaard-Oeschger oscillations Paleoceanography. ,vol. 29, pp. 99- 114 ,(2014) , 10.1002/2013PA002509
Mahyar Mohtadi, Matthias Prange, Delia W. Oppo, Ricardo De Pol-Holz, Ute Merkel, Xiao Zhang, Stephan Steinke, Andreas Lückge, North Atlantic forcing of tropical Indian Ocean climate Nature. ,vol. 509, pp. 76- 80 ,(2014) , 10.1038/NATURE13196
Hartmut Heinrich, Origin and Consequences of Cyclic Ice Rafting in the Northeast Atlantic Ocean During the Past 130,000 Years Quaternary Research. ,vol. 29, pp. 142- 152 ,(1988) , 10.1016/0033-5894(88)90057-9
H. Rashid, B.P. Flower, R.Z. Poore, T.M. Quinn, A ~25 ka Indian Ocean monsoon variability record from the Andaman Sea Quaternary Science Reviews. ,vol. 26, pp. 2586- 2597 ,(2007) , 10.1016/J.QUASCIREV.2007.07.002
Tabish Raza, Syed Masood Ahmad, Madhusmita Sahoo, Barnita Banerjee, Itishree Bal, Seema Dash, Gorti Suseela, Indrani Mukherjee, Hydrographic changes in the southern Bay of Bengal during the last ∼65,000 y inferred from carbon and oxygen isotopes of foraminiferal fossil shells Quaternary International. ,vol. 333, pp. 77- 85 ,(2014) , 10.1016/J.QUAINT.2014.02.010
Pawan Govil, Pothuri Divakar Naidu, Evaporation-precipitation changes in the eastern Arabian Sea for the last 68 ka: Implications on monsoon variability Paleoceanography. ,vol. 25, ,(2010) , 10.1029/2008PA001687