Remote sensing and analysis of 2nd order, Arctic-aerosol parameters

气溶胶通常被定义为大气颗粒，其大小范围从一微米的一小部分到几十微米。它们源于各种各样的气溶胶排放过程：森林火灾、风吹沙漠、气体到颗粒的转化、火山爆发和海浪过程是一些主要的天然气溶胶来源，而城市和工业过程引起的化石燃料燃烧是最重要的人为来源。至少就其光学效应而言，气溶胶可以在很大程度上分为双模态、细模态和粗模态组分（半径大致为亚微米和超微米）。

Aerosols are commonly defined as atmospheric particles whose size ranges from a small fraction of a micrometer to tens of micrometers. They originate from a large variety of aerosol emission processes : forest fires, wind-blown deserts, gas to particle conversion, volcanic eruptions and ocean wave processes are some of the major natural aerosol sources while fossil fuel combustion due to urban and industrial processes is the most important anthropogenic source. Aerosols can, at least as far as their optical effects are concerned, be largely divided into bi-modal, fine and coarse mode components (roughly sub and super micrometer in radius).