Transport of mineral aerosol from Asia Over the North Pacific Ocean
Transport of mineral aerosol from Asia Over the North Pacific Ocean
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DOI：
10.1029/jc088ic09p05343
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发表时间：
1983-06
影响因子：
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通讯作者：
M. Uematsu;R. Duce;J. Prospero;Liqi Chen;J. Merrill;R. Mcdonald
中科院分区：
文献类型：
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作者：
M. Uematsu;R. Duce;J. Prospero;Liqi Chen;J. Merrill;R. Mcdonald
1981年1月至1982年3月期间，在北太平洋SEAREX亚洲沙尘网络的七个站，每周测量一次大气铝浓度，这是矿物气溶胶的一个良好指标。季节性运输模式被发现在大多数网站，高铝浓度从2月至6月和低浓度从7月至1月。年平均大气粉尘浓度存在纬度梯度，中纬度地区粉尘浓度最高。再加上亚洲沙尘暴和日本Kosa（可追溯到中国起源的密集沙尘霾）的统计数据，数据表明，在网络中收集的灰尘是由西风带从亚洲干旱地区输送来的。据估计，每年有6-12×106吨亚洲尘埃被输送到北太平洋中部;更大的数量可能沉积在北太平洋西部，更接近亚洲来源。这种通过大气输送的矿物气溶胶是北太平洋沉积物的重要来源。
Concentrations of atmospheric aluminum—a good indicator of mineral aerosol—have been measured weekly, between January 1981 and March 1982, at the seven stations of the SEAREX Asian Dust Network in the North Pacific. A seasonal transport pattern was found at most of the sites, with high Al concentrations from February to June and low concentrations from July to January. There was a latitudinal gradient in the mean annual atmospheric dust concentration, with the greatest concentrations occurring in the mid-latitudes. When coupled with statistics of dust storms in Asia and of Kosa (dense dust hazes traced to Chinese origins) in Japan, the data suggest that the dust collected in the network was transported by the westerlies from arid regions in Asia. It is estimated that 6–12×106 tons of Asian dust are transported annually to the central North Pacific; larger quantities are probably deposited over the western North Pacific, closer to the Asian sources. This atmospherically transported mineral aerosol is a significant source of sedimentary material for the North Pacific.