Sea surface temperature and salinity variations from the end of Last Glacial Maximum (LGM) to the Holocene in the northern South China Sea
Sea surface temperature and salinity variations from the end of Last Glacial Maximum (LGM) to the Holocene in the northern South China Sea
复制标题
南海北部末次盛冰期末至全新世海表温度和盐度变化
DOI：
10.1016/j.palaeo.2020.110102
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发表时间：
2020-11
期刊：
影响因子：
--
通讯作者：
Liu Jian
中科院分区：
文献类型：
--
作者：
Yin Jian;Yang Xiaoqiang;Zhou Qixian;Li Guanhua;Gao Huahong;Liu Jian
陆地和海洋的古气候和古海洋学研究，特别是过去的季风和海面条件，有助于更好地了解气候系统内部的反馈过程。然而，在从末次冰盛期(LGM)到全新世的升温过渡期间，陆地和海洋的记录之间观察到了不同步，这引发了关于古气候变化的原生强迫的争论。本文以南海北部中国海区北部的沉积岩芯ZSQD_2为研究对象，根据浮游有孔虫Globigerinoidesruberensu Strecto(S.S.)的Mg/Ca比值和同位素组成(δ18O和δ13C)，分析了海表面温度和盐度的变化，并分析了其与亚洲季风体系的对应格局。这些记录表明，从16LGMka开始变暖，与东亚夏季风记录相吻合，揭示了南海北部海面状况与中国大陆古气候变化的同步性，从末次盛冰期末期开始变暖。镜像海温和海温变化与石笋δ18O信号同步，也揭示了南海北部表层水状况与东亚夏季风强度的密切关系。在千年时间尺度上，中国大陆古气候变化与南海北部海水条件的不同步表现为海温下降，~13C.rubera和δ11.5~9.5Cka期间 ~ 偏重，东亚夏季风增强，SSS下降。这是由于东亚夏季风驱动的上升流加强冷却了南海北部的地表水，增加了南海北部的营养物质供应，加上珠江冷淡水输入的增加。
Paleoclimatic and palaeoceanographic studies in land and sea, especially monsoon and sea surface conditions in the past, help to better understand the internal feedback processes within the climate system. However, asynchronisms were observed between records from land and sea at the warming transition from the end of the Last Glacial Maximum (LGM) to the Holocene, raising debating of primary forcing of paleoclimatically variations. In this work, a sediment core ZSQD2, from the northern South China Sea (SCS), spanning the end of the LGM to the mid-Holocene, was utilized to evaluate variations of sea surface temperature and salinity, and then analyze the correspond pattern to the Asian Monsoon system, based on measured Mg/Ca ratio and isotopic compositions (δ18O and δ13C) of planktonic foraminiferaGlobigerinoides rubersensu stricto (s.s.). These records show that the warming started from ~16 ka, which agrees well with the East Asian Summer Monsoon (EASM) records, revealing the synchronism in variations between the northern SCS sea surface conditions and the palaeoclimate of China Mainland, at the beginning of warming transition from the end of LGM. Mirrored SST and SSS variations were in step with stalagmite δ18O signals, also unveiling a close relationship between sea surface water condition in the northern SCS and the EASM intensity. On millennial timescales, asynchronism between the China Mainland palaleoclimatic changes and seawater conditions of the northern SCS is displayed by declined SST and heavier δ13CG.ruberduring ~15–13.5 and ~ 11.5–9.5 ka, when the EASM enhanced and SSS declined. This is resulted from strengthened the EASM driven upwelling cooled down the surface water and enhanced nutrient supply in the northern SCS, combined increasing cold and fresh water input from the Pearl River.
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影响因子：
--
作者：
A. Legrande;G. Schmidt
通讯作者：
A. Legrande;G. Schmidt
影响因子：
4
作者：
Y. Zong;Kangyou Huang;F. Yu;Zhuo Zheng;A. Switzer;Guangqing Huang;Ning Wang;Min Tang
通讯作者：
Y. Zong;Kangyou Huang;F. Yu;Zhuo Zheng;A. Switzer;Guangqing Huang;Ning Wang;Min Tang
DOI：
10.1016/j.palaeo.2005.11.033
发表时间：
2006-06
期刊：
Palaeogeography, Palaeoclimatology, Palaeoecology
影响因子：
--
作者：
Meixun Zhao;Chi‐Yue Huang;Chia-Chun Wang;G. Wei
通讯作者：
Meixun Zhao;Chi‐Yue Huang;Chia-Chun Wang;G. Wei
影响因子：
5.3
作者：
Gray, William R.;Weldeab, Syee;Fischer, Gerhard
通讯作者：
Fischer, Gerhard
影响因子：
64.8
作者：
J. Duplessy;L. Labeyrie;M. Arnold;M. Paterne;J. Duprat;T. V. Weering
通讯作者：
J. Duplessy;L. Labeyrie;M. Arnold;M. Paterne;J. Duprat;T. V. Weering