Cristofanelli Paolo, Bonasoni Paolo
Institute of Atmospheric Sciences and Climate-National Research Council (ISAC-CNR), via Gobetti 101, 40129 Bologna, Italy.
Environ Pollut. 2009 May;157(5):1399-406. doi: 10.1016/j.envpol.2008.09.017. Epub 2008 Nov 1.
The troposphere is subject to continuous inputs, production and removal processes of ozone and its precursors from natural processes and human activities acting together within a very complex system. In order to assess the behaviour of background ozone in the Mediterranean area, a description of trends, seasonal and diurnal behaviours of free tropospheric ozone is provided. In the Mediterranean area and southern Europe the background tropospheric ozone concentration appears significantly affected by three main air mass transport processes: (i) transport of polluted air masses on regional and long-range scales, (ii) downward transport of stratospheric air masses, and (iii) transport of mineral dust from the Sahara desert. In this review of the literature of the last two decades, we present an overview of these phenomena, mainly monitored at high baseline mountain stations representative of background atmospheric conditions.
对流层处于一个非常复杂的系统中，受到自然过程和人类活动共同作用产生的臭氧及其前体的持续输入、生成和去除过程的影响。为了评估地中海地区背景臭氧的行为，本文描述了对流层自由臭氧的趋势、季节性和日变化行为。在地中海地区和南欧，背景对流层臭氧浓度似乎受到三种主要气团输送过程的显著影响：（i）区域和远距离尺度上污染气团的输送；（ii）平流层气团的向下输送；（iii）来自撒哈拉沙漠的矿物尘埃的输送。在对过去二十年文献的综述中，我们概述了这些现象，这些现象主要在代表背景大气条件的高基线山区站点进行监测。
