Radiocarbon in Dissolved Organic and Inorganic Carbon of the South China Sea
Radiocarbon in Dissolved Organic and Inorganic Carbon of the South China Sea
复制标题
南海溶解有机碳和无机碳中的放射性碳
DOI：
10.1029/2020jc016073
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发表时间：
2020-04
影响因子：
3.6
通讯作者：
Wang Xuchen
中科院分区：
文献类型：
--
作者：
Ding Ling;Qi Yuanzhi;Shan Sen;Ge Tiantian;Luo Chunle;Wang Xuchen
通过对南海中国海域的碳同位素(14C和13C)、溶解无机碳和溶解有机碳浓度的测定，揭示了南海两大碳库的不同来源和循环时间尺度。DIC浓度在1,776~2,328μ−/kg−1之间，表层较低，随深度增加而增加。相反，溶解有机碳浓度变化范围为38~95μM，表层浓度较高，500m水深以下浓度下降较快。DICΔ14C和DOCΔ14C值分别在−227‰到68‰和−557‰到−258‰之间变化，两者都随着深度的增加而减小，直到1,500米，然后保持相对恒定。DOCΔ14C值为−330‰，低于DICΔ14C，表明DOC在SCS中的循环时间比DIC长得多。700m以下较低的Δ14C-DIC值和Δ14C-DOC值主要受垂直混合增强的影响，Δ14C-DIC值和Δ14C-DOC值较低的深水向上涌出，与上层水充分混合。相反，南海和北太平洋之间深水(>；1,500微米)的Δ14C信号的微小差异证实了通过吕宋海峡的快速水交换和南海盆地的快速水混合，这对控制南海深层的碳循环起到了重要作用。
We present the carbon isotope (14C and13C), dissolved inorganic carbon (DIC), and dissolved organic carbon (DOC) concentration measurements in the South China Sea (SCS) to reveal the different sources and cycling time scales of the two major carbon pools in the SCS. The DIC concentrations ranged from 1,776 to 2,328 μmol kg−1, and they were lower at the surface and increased with depth. Conversely, the DOC concentrations ranged from 38 to 95 μM, and they were higher on the surface and decreased rapidly in the upper 500‐m water depth. The DIC Δ14C and DOC Δ14C values varied from −227‰ to 68‰ and −557‰ to −258‰, respectively, and both decreased with depth until 1,500 m and then remained relatively constant. DOC Δ14C values were −330‰ lower than DIC Δ14C, indicating that DOC has cycled for much longer than DIC in the SCS. The lower Δ14C‐DIC and Δ14C‐DOC values at depths shallower than 700 m were mainly influenced by intensified vertical mixing, which upwelled the deep water with low Δ14C‐DIC and Δ14C‐DOC values for thorough mixture with the upper layer water. Conversely, the small difference in the Δ14C signature in deep water (>1,500 m) between the SCS and the North Pacific confirmed the rapid water exchange through the Luzon Strait and rapid water mixing in the SCS basin, which plays an important role in controlling carbon cycling in the deep SCS.
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影响因子：
3
作者：
J. Sharp;R. Benner;L. Bennett;C. Carlson;S. Fitzwater;E. Peltzer;L. Tupas
通讯作者：
J. Sharp;R. Benner;L. Bennett;C. Carlson;S. Fitzwater;E. Peltzer;L. Tupas
南海溶解有机碳及其与西太平洋的交换
DOI：
10.1016/j.dsr2.2015.06.013
发表时间：
2015-12
影响因子：
3
作者：
Wu Kai;Dai Minhan;Chen Junhui;Meng Feifei;Li Xiaolin;Liu Zhiyu;Du Chuanjun;Gan Jianping
通讯作者：
Gan Jianping
DOI：
10.1016/s0168-583x(00)00093-8
发表时间：
2000-10
影响因子：
1.3
作者：
A. McNichol;R. Schneider;K. F. Reden;A. Gagnon;K. Elder;Nosams;R. Key;P. Quay
通讯作者：
A. McNichol;R. Schneider;K. F. Reden;A. Gagnon;K. Elder;Nosams;R. Key;P. Quay
影响因子：
3
作者：
Chen, CTA;Wang, SL;Pai, SC
通讯作者：
Pai, SC
影响因子：
5.2
作者：
Key, RM;Kozyr, A;Peng, TH
通讯作者：
Peng, TH