Reactivity and photochemistry of halide anions: atmospheric implications

溴和碘被怀疑是造成平流层中卤素引起的臭氧损失的主要原因，但由于缺乏关于其阴离子和自由基的气相化学和光化学的知识，目前尚未将其纳入大气模型。该项目将开发和部署先进的质谱和激光光谱技术，以精确测量气相碘和溴阴离子及其氧化物的反应和光反应。这些对反应动力学和产物的最先进测量将使准确的化学模型能够预测溴和碘化学对臭氧水平的影响，并将为未来的全球气候模型提供信息。

Bromine and iodine are suspected to be responsible for most of the halogen-induced ozone loss in the stratosphere but are not currently included in atmospheric models due to a paucity of knowledge of the gas-phase chemistry and photochemistry of their anions and radicals. This project will develop and deploy advanced mass spectrometry and laser spectroscopy techniques to enable precision measurements of the reactions and photo-reactions of gas-phase iodide and bromide anions and their oxides. These state-of-the-art measurements of reaction kinetics and products will enable accurate chemical models that predict the impact of bromine and iodine chemistry on ozone levels and will inform future models for global climate.