Seawater temperature seasonality in the South China Sea during the late Holocene derived from high-resolution Sr/Ca ratios of Tridacna gigas

Temperature seasonality, the difference between summer and winter temperature, has significant influences on global terrestrial and marine ecosystems. However, most of proxy-based climate records are of limited temporal resolution and thus insufficient to quantify the past temperature seasonality. I...

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Bibliographic Details
Published in:Quaternary Research
Main Authors: Yan, Hong, Sun, Liguang, Shao, Da, Wang, Yuhong
Format: Article in Journal/Newspaper
Language:English
Published: ACADEMIC PRESS INC ELSEVIER SCIENCE 2015
Subjects:
South China Sea
Tridacna Gigas
Sr/ca
Temperature Seasonality
Late Holocene
Science & Technology
Physical Sciences
Stable-isotope Profiles
Porites-lutea Corals
Early Middle Eocene
Great-barrier-reef
Surface Temperature
North-atlantic
Arctica-islandica
Oxygen-isotope
New-guinea
Paleoclimatic Implications
Physical Geography
Geology
Geography
Physical
Geosciences
Multidisciplinary
Arctica islandica
North Atlantic
Online Access:http://ir.ieecas.cn/handle/361006/9377
http://ir.ieecas.cn/handle/361006/9378
https://doi.org/10.1016/j.yqres.2014.12.001
Description
Summary:Temperature seasonality, the difference between summer and winter temperature, has significant influences on global terrestrial and marine ecosystems. However, most of proxy-based climate records are of limited temporal resolution and thus insufficient to quantify the past temperature seasonality. In this study, high-resolution Sr/Ca ratios of modern (live-caught) and fossil (dead-collected) Tridacna gigas shells from the South China Sea (SCS) were used to reconstruct the seawater temperature seasonality during the late Holocene. The averaged seawater temperature seasonality around 2165 +/- 75 BC (4.46 +/- 1.41 degrees C, derived from the data of 18 yr) were similar to the seasonality of recent decade (4.41 +/- 0.82 degrees C during AD 1994-2005), but the temperature seasonality around AD 50 +/- 40(3.69 +/- 1.37 degrees C, derived from the data of 48 yr) and AD 990 +/- 40(3.64 +/- 0.87 degrees C, derived from the data of 11 yr) was significantly lower than that during AD 1994-2005. The reduced seasonality around AD 990 40 was attributable to the unusually warm winter during the medieval times, probably caused by the weakening of East Asian Winter Monsoon. Our study highlighted the potential of T. gigas shells in providing high-resolution seasonality climate information during the late Holocene. (C) 2014 University of Washington. Published by Elsevier Inc. All rights reserved.

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