Atmospheric input of mineral dust to the western North Pacific region based on direct measurements and a regional chemical transport model
Atmospheric input of mineral dust to the western North Pacific region based on direct measurements and a regional chemical transport model
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DOI：
10.1029/2002gl016645
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发表时间：
2003-03-29
影响因子：
5.2
通讯作者：
Uno, I
中科院分区：
文献类型：
--
作者：
Uematsu, M;Wang, ZF;Uno, I
[1]利用区域化学输送模式（AQPMS）分析了1994年3月~ 1995年5月北太平洋西部地区矿物气溶胶浓度及其总沉降通量的时空变化。干沉积占整个时期亚洲矿物粉尘沉积总量的60%以上。研究区年沉积通量从沿海地区(21 g m（-2) yr(-1)）到远洋地区(0.8 g m（-2) yr(-1)）迅速减少。HNLC地区的零星粉尘沉降事件可能会增加海水中溶解铁的浓度，从而刺激海洋生物活性。矿物粉尘的主要东向流位于对流层30 ~ 40°n之间，在最大浓度层之上。这些结果支持亚洲矿物粉尘作为背景气溶胶穿越北太平洋的洲际运输。
[1] The spatial and temporal variation of the mineral aerosol concentration and its total deposition flux over the western North Pacific region were analyzed with a regional chemical transport model (AQPMS) for the period March 1994 through May 1995. Dry deposition accounted for more than 60% of the total deposition of Asian mineral dust throughout the period. The annual deposition flux was found to decrease rapidly from the coastal area (21 g m(-2) yr(-1)) to the open ocean (0.8 g m(-2) yr(-1)) over the study region. Sporadic dust deposition events over the HNLC region may increase the dissolved iron concentration in seawater and hence stimulate marine biological activity. The main eastward flow of mineral dust is located in the free troposphere between 30 and 40degreesN, above the layer of maximum concentration. These results support the intercontinental transport of Asian mineral dust across the North Pacific as background aerosol.