Enhanced vertical turbulent nitrate flux in the Kuroshio across the Izu Ridge
Enhanced vertical turbulent nitrate flux in the Kuroshio across the Izu Ridge
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DOI：
10.1007/s10872-018-0500-2
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发表时间：
2018-11
影响因子：
2.3
通讯作者：
T. Tanaka;D. Hasegawa;I. Yasuda;H. Tsuji;S. Fujio;Y. Goto;J. Nishioka
中科院分区：
文献类型：
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作者：
T. Tanaka;D. Hasegawa;I. Yasuda;H. Tsuji;S. Fujio;Y. Goto;J. Nishioka
本文首次对横跨伊豆洋脊的黑潮进行了NO_3垂直通量的直接测量，结果表明，在1%光照深度的底脊附近存在较大的NO_3通量。这种大通量NO3可能会增强下游浮游植物的生长。在黑潮营养流核心与北太平洋中层水之间的26.0-26.6 σθ处也观测到了非常大的NO3通量。我们假设，强烈的垂直混合在伊豆海脊提请足够的硝酸盐从北太平洋中层水的营养流，最终影响下游的地球化学在西北太平洋。
The first direct measurements of vertical turbulent nitrate flux,FluxNO3, were conducted in the Kuroshio across the Izu Ridge and revealed largeFluxNO3near the sill crest at the 1% light depth. This largeFluxNO3possibly enhances downstream phytoplankton growth. Extremely largeFluxNO3was also observed at 26.0–26.6 σθbetween the core of the Kuroshio nutrient stream and the North Pacific Intermediate Water. We hypothesize that strong vertical mixing in the Izu Ridge draws sufficient nitrate upward from the North Pacific Intermediate Water to the nutrient stream, which eventually impacts the downstream biogeochemistry in the western North Pacific.