Chemical composition of rain in Thessaloniki, Greece, in relation to meteorological conditions

Atmospheric Environment. Part B. Urban Atmosphere Pub Date : 1992-09-01 DOI:10.1016/0957-1272(92)90011-G

C. Samara , R. Tsitouridou , Ch. Balafoutis

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引用次数: 80

Abstract

Wet precipitation was collected in Thessaloniki, Greece, during the period March 1989–December 1990 by using an automatic wet-only precipitation sampler.

Rainwater samples were analysed for major cations (H⁺, NH₄⁺, Na⁺, K⁺, Ca²⁺, Mg²⁺) and anions (Cl⁻, NO₃⁻, SO₄²⁻), in addition to acidity and conductivity measurements. The majority of rain had a neutral or alkaline character as a result of neutralization, primarily caused by calcareous soil dust and secondarily by atmospheric ammonia. In all rain, SO₄²⁻ concentration exceeded NO₃⁻ concentration. The contribution of maritime sources to the total SO₄²⁻ concentration was very low (<2%).

The chemical composition of precipitation was analysed in conjunction with meteorological variables (season of the year, precipitation type, airflow patterns) to evaluate temporal variations and chemical source influence. Rain caused by weak, localized flows showed the highest acidity and the minimum influence of neutralization processes.

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希腊塞萨洛尼基雨的化学成分与气象条件的关系

1989年3月至1990年12月，在希腊塞萨洛尼基用全自动湿降水采样器收集了湿降水。除了酸度和电导率测量外，还分析了雨水样品的主要阳离子(H+， NH4+， Na+， K+， Ca2+， Mg2+)和阴离子(Cl−，NO3−，SO42−)。由于中和作用，大部分雨水呈中性或碱性，主要由钙质土壤粉尘引起，其次由大气氨引起。在所有降雨中，SO42−浓度均超过NO3−浓度。海洋源对总SO42−浓度的贡献非常低(2%)。结合气象变量(一年中的季节、降水类型、气流模式)分析了降水的化学成分，以评价时间变化和化学源的影响。弱局部流动引起的降雨酸度最高，中和过程的影响最小。

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Atmospheric Environment. Part B. Urban Atmosphere

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