Browsing by Author "Sourav Ghoshal"
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PublicationArticle Sulfuric acid decomposition chemistry above Junge layer in Earth's atmosphere concerning ozone depletion and healing(Springer Nature, 2019) Montu K. Hazra; Sourav Ghoshal; Prabhash Mahata; Biswajit MaitiSulfuric acid (H2SO4) is the seed molecule for formation of stratospheric sulfate aerosol layer that assists ozone depletion by activation of halogen species. The impact of increased stratospheric sulfate aerosols due to large volcanic eruptions and possible side effect claimed in the geoengineering scheme of global climate using man-made injected stratospheric sulfate aerosols is ozone depletion. Given that both volcanic eruptions and geoengineering scheme are ultimately connected with increased upper stratospheric concentrations of H2SO4, here we show by theoretical approach that the pressure-independent H2SO4 + O(1D) insertion/addition reactions via barrierless formation of peroxysulfuric acid (H2SO5) or HSO4 + OH radicals or sulfur trioxide (SO3) + hydrogen peroxide (H2O2) molecules are the potential routes towards H2SO4 loss above the stratospheric sulfate aerosol layer, and for the regeneration or transportation of consumed lower-middle stratospheric OH radical in the upper stratosphere at the cost of O(1D)/ozone. © 2019, The Author(s).