Sea ice variability and primary productivity in the Ross Sea, Antarctica, from methylsulphonate snow record
Sea ice variability and primary productivity in the Ross Sea, Antarctica, from methylsulphonate snow record
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来自甲基磺酸雪记录的南极洲罗斯海海冰变化和初级生产力
DOI：
10.1029/2009gl037311
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发表时间：
2009
影响因子：
5.2
通讯作者：
K. Arrigo
中科院分区：
文献类型：
--
作者：
R. Rhodes;N. Bertler;J. Baker;S. Sneed;H. Oerter;K. Arrigo
罗斯海拥有南极洲最具生物生产力的大陆架，是一个每年形成海冰驱动大量底水形成的地区。我们介绍了埃里伯斯山的雪坑化学数据，这些数据为重建夏季海冰条件和海洋初级生产力提供了一个定量的替代。甲基磺酸盐(MS)的记录与开阔水域面积的变化密切相关(R2=0.903，p<；0.05)，这是由于大气环流的差异以及分别于2000年和2002年从罗斯冰架崩解的大型冰山B-15和C-19的海冰筑坝效应造成的。此外，MS与浮游植物净初级生产力显著相关(R2=0.927，p<；0.01)。我们的结果证明了埃里伯斯山鞍状冰核重建罗斯海海冰和初级生产力变化的潜力，超出了观测记录。
The Ross Sea contains the most biologically productive continental shelf in Antarctica and is a region where the annual formation of sea ice drives substantial amounts of bottom water formation. We present snow pit chemistry data from Mt Erebus Saddle that provide a quantitative proxy to reconstruct summer sea ice conditions and rates of marine primary production. The methylsulphonate (MS) record is strongly correlated with changes in the area of open water (R2 = 0.903, p < 0.05) caused by differences in atmospheric circulation and the sea‐ice‐damming effect of large icebergs, B‐15 and C‐19, which calved from the Ross Ice Shelf in 2000 and 2002 respectively. Furthermore, MS and phytoplankton net primary production correlate significantly (R2 = 0.927, p < 0.01). Our results demonstrate the potential of the Mt Erebus Saddle ice core to reconstruct sea ice and primary productivity variability in the Ross Sea beyond the observational record.