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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/24790

Title: Proxy dependence of the temporal pattern of deglacial warming in the tropical South China Sea: toward resolving seasonality
Authors: Stephan Steinke;Markus Kienast;Jeroen Groeneveld;Li-Chuan Lin;Min-Te Chen;Rebecca Rendle-Bühring
Contributors: NTOU:Institute of Applied Geosciences
國立臺灣海洋大學:應用地球科學研究所
Keywords: LAST GLACIAL MAXIMUM;ATLANTIC OVERTURNING CIRCULATION;LIVING PLANKTONIC-FORAMINIFERA;SURFACE TEMPERATURE RECORD;EAST-ASIAN MONSOON;EQUATORIAL PACIFIC;NORTH-ATLANTIC;CLIMATE-CHANGE;VERTICAL-DISTRIBUTION;SEDIMENT RECORDS
Date: 2008-04
Issue Date: 2011-10-20T08:17:41Z
Publisher: Quaternary Science Reviews
Abstract: abstract:Sea surface temperatures (SSTs), reconstructed from two Globigerinoides ruber (white) morphotypes (G. ruber sensu stricto, (s.s.); G. ruber sensu lato, ( s.l.)) Mg/Ca and alkenones (UK′37) from core MD01-2390 from the tropical South China Sea (SCS) during the last deglaciation reveal a proxy-dependent discrepancy in the temporal pattern of the deglacial warming. Alkenone data suggest that the deglacial warming is punctuated by a decrease in temperature between ∼17 and 15 ka BP, corroborating previously published alkenone UK′37 SST records from the southern SCS. Within dating uncertainties, this cooling is coeval with the Heinrich Event 1 (H1) time interval in the North Atlantic region, underscoring the imprints of northern hemisphere forcing on tropical SCS ocean temperatures. The deglacial UK′37 SST minimum is also paralleled by a maximum in G. ruber morphotype-specific δ18O. G. ruber Mg/Ca SST estimates suggest a morphotype-specific record of SSTs during the time interval of H1. Whereas G. ruber s.s. imply a continuous warming starting around 18 ka BP without any marked response to H1, G. ruber s.l.-based Mg/Ca SST estimates reveal a cooling around ∼17–15 ka BP similar to the H1 interval cooling seen in the alkenone SST record. Similar proxy-dependent differences in deglacial surface water warming have been recorded in the eastern equatorial Pacific, implying a common pattern on both sides of the tropical Pacific Ocean. We submit that this discrepancy could be due to differences in seasonality of planktonic foraminifera G. ruber morphotypes and alkenone-producing algae.
Relation: 27(7-8), pp.688–700
URI: http://ntour.ntou.edu.tw/handle/987654321/24790
Appears in Collections:[應用地球科學研究所] 期刊論文

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