Observation of dust and anthropogenic aerosol plumes in the Northwest Pacific with a two‐wavelength polarization lidar on board the research vessel Mirai
Observation of dust and anthropogenic aerosol plumes in the Northwest Pacific with a two‐wavelength polarization lidar on board the research vessel Mirai
复制标题
DOI：
10.1029/2002gl015112
复制
发表时间：
2002-10
影响因子：
5.2
通讯作者：
N. Sugimoto;I. Matsui;A. Shimizu;I. Uno;K. Asai;T. Endoh;T. Nakajima
中科院分区：
文献类型：
--
作者：
N. Sugimoto;I. Matsui;A. Shimizu;I. Uno;K. Asai;T. Endoh;T. Nakajima
在2001年5月14-28日的MR01-K02巡航期间，利用Mirai号科考船上的双波长偏振激光雷达，在西北太平洋(32.0°到38.0°N，146.5°E)观测到了亚洲大陆的沙尘和人为气溶胶羽流。从532 nm处的气溶胶退偏率和1064 nm和532 nm处的后向散射系数之比来识别沙尘气溶胶。在烟羽中还检测到了高气溶胶密度气团，具有低的退偏率和小的波长比(表明粒子尺寸较小)。利用化学天气预报系统(CFORS)对沙尘和硫酸盐进行模式预报，从概念上解释了沙尘和球形气溶胶的分布规律。沙尘和硫酸盐之间的气溶胶颗粒较大，但消偏率较低。这表明气溶胶可能是尘埃和硫酸盐的内部混合物。
Dust and anthropogenic aerosol plumes from the Asian continent were observed in the Northwest Pacific (32.0° to 38.0°N, 146.5°E) with a two‐wavelength polarization lidar on board the research vessel Mirai during the MR01‐K02 cruise (May 14 to 28, 2001). Dust aerosols were identified from the aerosol depolarization ratio at 532 nm and the ratio of the backscattering coefficient at 1064 nm and 532 nm. High aerosol density air masses with a low depolarization ratio and a small wavelength ratio (indicating small particle size) were also detected in the plume. The distribution patterns of the dust and the spherical aerosols were conceptionally explained by the model prediction for dust and sulfate with the Chemical Weather Forecast System (CFORS). Aerosols with large particle size but with low depolarization ratio were also observed in between the layers of dust and sulfate. This indicates that the aerosols were possibly an internal mixture of dust and sulfate.