Contribution of upwelling to air-sea N2O flux at the tip of the Antarctica Peninsula
Contribution of upwelling to air-sea N2O flux at the tip of the Antarctica Peninsula
复制标题
南极半岛顶端上升流对海气 N2O 通量的贡献
DOI：
10.1002/lno.11004
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发表时间：
2018
影响因子：
4.5
通讯作者：
J. Liu
中科院分区：
文献类型：
--
作者：
L. Zhan;L. Chen;J. Zhang;Y. Li;M. Wu;J. Liu
在中国第28次南极考察中，考察了南极半岛附近海域，包括斯科舍海、布兰斯菲尔德海峡部分海域和鲍威尔海盆。结果表明，TAP两侧N2 O的垂直分布相似，但呈升高趋势;在威德尔海深水区最大的鲍威尔海盆，没有观测到斯科舍海的N2 O浓度和相应的绕极深水（CDW）信号。研究区域的平均海气N2 O通量为~ 8.83 3.32 μmol m−2 d−1，这表明这些沃茨虽然重要，但不是大气N2 O的主要来源。一个dimensional.box模式的结果表明，CDW的上升流有助于TAP北部的N2 O通量。TAP南部的水比TAP北部的水冷，南部冬季冷水的存在往往会阻止富含N2 O的威德尔深水上升到地表。在TAP以北的沃茨，观察到富含N2 O的CDW向上涌向表层，导致过饱和并释放到大气中。相反，南部的沃茨主要是冬季寒冷的水，与大气平衡。generally.in
During the 28th Chinese National Antarctic Research Expedition, the seas adjacent to the tip of the Antarctic.Peninsula (TAP), including the Scotia Sea, parts of the Bransfield Strait, and the Powell Basin, were investigated..The results show that the vertical distributions of N2O on both sides of the TAP are similar but that elevated.N2O concentrations and corresponding upper circumpolar deep water (CDW) signals in the Scotia Sea are.absent from the Powell Basin, where the largest areas of Weddell Sea deep water were observed during this.cruise. The average air-sea N2O flux of the study area is ~ 8.83 3.32 μmol m−2 d−1, suggesting that these.waters, while significant, are not an overwhelming source of atmospheric N2O. The results of one dimensional.box model indicate that the upwelling of the CDW contributes to the N2O flux north of TAP. The water to the.south of the TAP is colder than that to the north of TAP, and the presence of cold winter water in the south.tends to keep the N2O-rich Weddell Deep Water from upwelling to the surface. CDW, enriched in N2O, was.observed to upwell toward the surface layers resulting in oversaturation and outgassing to the atmosphere in.waters north of TAP. In contrast, waters to the south which were dominated by cold winter water were generally.in equilibrium with the atmosphere.