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首页> 外文期刊>Journal of oceanography >Upward transport of iron at the west shelf edge-slope of the Okinawa Trough in the East China Sea
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Upward transport of iron at the west shelf edge-slope of the Okinawa Trough in the East China Sea

机译：东海冲绳海槽西陆架边坡上的铁向上传输

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摘要

We studied the behavior of chemical substances in the upper 300 m of the water column across the continental shelf-slope interface in the East China Sea off the Okinawa Trough. The behaviors of iron, inorganic nutrients, and humic-like fluorescent dissolved organic matter were strongly influenced by the extensive water exchange between the East China Sea and the Kuroshio Current across the shelf break and slope via upwelling and frontal processes. We attributed the high humic-like fluorescent intensity at the subsurface of the shelf break and slope regions to the lateral supply of humic-like fluorescent dissolved organic matter from the shelf sediments to the outer shelf region due to the intrusion of shelf water into Kuroshio subsurface water. We found that the behavior of iron at the continental shelf-slope was remarkably different from the conservative mixing of inorganic nutrients and humic-like fluorescent dissolved organic matter. In deep and bottom waters at the shelf-slope, high total iron concentrations, which were closely related to water transmittance, possibly resulted from the swept transport of iron-rich resuspended sediments over the shelf floor from the slope by the invading Kuroshio Intermediate Water close to the bottom.
机译：我们研究了冲绳海槽外东海大陆架-斜坡界面上水柱上部300 m中化学物质的行为。铁，无机养分和腐殖质样荧光溶解的有机物的行为受到东海和黑潮洋流在陆架断裂和斜坡上通过上涌和锋面过程的广泛水交换的强烈影响。我们将架子破裂和斜坡区域地下的腐殖质类荧光强度高归因于由于架子水侵入黑潮地下而从架子沉积物向外部架子区域横向供应腐殖质类荧光溶解有机物。水。我们发现，铁在大陆架斜坡上的行为与无机养分和腐殖质样荧光溶解的有机物的保守混合明显不同。在架子坡的深层和底部水域中，高总铁浓度与透水率密切相关，这可能是由于侵入性黑潮中层水将斜坡上的富铁重悬沉积物从斜坡上横扫了整个架子所致。至底部。

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