Size change of Asian dust particles caused by sea salt interaction: Measurements in southwestern Japan
Size change of Asian dust particles caused by sea salt interaction: Measurements in southwestern Japan
复制标题
DOI：
10.1029/2004gl020087
复制
发表时间：
2004-08-05
影响因子：
5.2
通讯作者：
Iwasaka, Y
中科院分区：
文献类型：
--
作者：
Zhang, DZ;Iwasaka, Y
水渗析被用来去除在日本西南部收集的单个亚洲尘埃颗粒中的水溶性成分。比较透析前后微粒的大小和组成。结果发现，与透析前相比，透析后矿物-海盐混合物颗粒的数量-粒度分布向较小的范围移动，且海盐含量越多，其分布的位移越大，而透析没有引起未发现海盐的颗粒的大小和形态的明显变化。对探测到的尘埃粒子总数的估计表明，与海盐的混合导致它们的粒度分布向更大范围移动了大约0.4到0.8毫米。因此，粉尘颗粒与海盐的相互作用可能是粉尘颗粒在长距离输送过程中尺寸和组成发生变化的重要过程，从而影响大气中的质量传递和辐射传输以及矿物粉尘向海面的沉积通量。
Water dialysis was applied to remove water-soluble components in the individual Asian dust particles collected in southwestern Japan. Size and composition of the particles before and after the dialysis were compared. It was found that the post-dialysis number-size distributions of mineral-sea salt mixture particles shifted toward smaller ranges compared to their pre-dialysis distributions and the more sea salt the particles contained the larger the shift of their distribution was, while the dialysis did not cause apparent changes in size or morphology of particles in which sea salt was not identified. Estimation from total detected dust particles revealed that mixing with sea salt had caused their size distributions to shift to larger ranges approximately by 0.4 similar to 0.8 mm. Hence, the interaction of dust particles and sea salt is likely an important process in size and composition changes of dust particles during their long range transport, consequently affecting mass transformation and radiation transfer in the atmosphere as well as the sedimental flux of mineral dust to sea surface.