Infrared Spectroscopy of Tropospheric Aerosols

在这个项目中，对流层气溶胶将使用红外光谱进行研究。海盐气溶胶粒子将在实验室中模拟高纬度和中纬度对流层的条件下产生和研究。这些气溶胶在氮氧化物和氮氧化物酸作用下的化学转化将用红外光谱进行跟踪。目的是解开温度和湿度依赖的机制，其中含有氯化钠的气溶胶转化为硝酸钠与化学活性氯的释放。即使在干旱条件下，水的吸附层也会影响盐颗粒表面的化学性质。研究了盐-水界面的性质。在海洋边界层中常见的气溶胶盐溶液滴也将被研究。计划进行光谱实验，研究水和冰粒在气溶胶中对二氧化硫的吸收。＊＊＊

9631838 Ewing In this project, tropospheric aerosols will be studied using infrared spectroscopy. Sea salt aerosol particles will be generated and studied in the laboratory under conditions that mimic those in the troposphere both in high and mid-latitudes. Chemical transformation of these aerosols by nitrogen oxides and acids of nitrogen oxides will be followed by infrared spectroscopy. The object is to unravel the temperature and humidity dependent mechanisms by which aerosols containing sodium chloride are transformed into sodium nitrate with the release of chemically active chlorine. Adsorbed layers of water influence the chemistry on salt particle surfaces even under arid conditions. The properties of the salt-water interface will be studied. Aerosol salt solution droplets, common to the marine boundary layer, will also be investigated. Spectroscopic experiments to study the uptake of sulfur dioxide in aerosols of water and ice particles are planned. ***