High correlations between Asian dust events and biological productivity in the western North Pacific
High correlations between Asian dust events and biological productivity in the western North Pacific
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DOI：
10.1029/2005gl025174
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发表时间：
2006-04
影响因子：
5.2
通讯作者：
Wei-jie Yuan;Jing Zhang
中科院分区：
文献类型：
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作者：
Wei-jie Yuan;Jing Zhang
1997年12月至2000年4月，对中国11个气象站沙尘天气与KNOT（日本共同社北太平洋时间序列站）沉积物通量的关系进行了研究。Al通量作为大陆性沙尘的一个很好的代表，与924 m水深的沙尘事件有显著的相关性（0.66-0.78）。这表明巴丹朱兰沙漠地区是西北太平洋风尘的主要来源。沙尘暴事件与蛋白石通量和羽纹硅藻之间也有很高的相关性。这表明沙尘事件刺激生物生产力，通过颗粒漂浮，吸附和共沉淀等过程提供营养物质。此外，924 m蛋白石通量与850 hPa高度异常之间存在明显的相关关系，滞后时间约为10 d。因此，它表明大气气旋活动也可能有助于海洋生产力。
The relationship between dust events at 11 meteorological stations in China and sediment‐trap fluxes at KNOT (the Kyodo North Pacific Ocean Time‐series station) was investigated during the period December 1997 to April 2000. Al flux, as a good proxy of continental dust, has significant correlations (0.66–0.78) with dust events at a water depth of 924 m. It suggests that the Badain Juran Desert region is a primary source of eolian dust to the western North Pacific. High correlations appeared between the dust events and opal flux, and PD (pennate diatoms) also. This suggests that dust events stimulate biological productivity, providing nutrients via processes such as particle floating, adsorption and co‐precipitation. In addition, evident correlation existed between opal flux at 924 m and GHA (geopotential height anomalies) at 850 hPa level with about a 10‐day time lag. Therefore, it suggests atmospheric cyclone activities might also contribute to ocean productivity.