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中国科学院生态环境研究中心贺泓院士团队发现大气Cl-光活化及其催化氧化SO2的新机制（图）
贺泓 大气 光活化 催化氧化
2024/2/25
硫酸盐是大气细颗粒物（PM2.5）的主要成分，对全球气候变化、区域空气质量以及人类健康都有重要影响。目前全球和区域大气模式不能准确模拟硫酸盐的观测结果，说明大气中存在硫酸盐的未知生成机制。贺泓院士团队与宾夕法尼亚大学Joseph S. Francisco教授团队、北京理工大学张秀辉教授团队合作研究发现，在潮解NaCl颗粒上，SO2可以发生非均相光氧化反应生成硫酸盐。通过实验和量子化学理论计算证实，...
Vertical transport rates and concentrations of OH and Cl radicals in the Tropical Tropopause Layer from observations of CO2 and halocarbons: implications for distributions of long- and short-lived chemical species
Vertical transport rates OH and Cl radicals the Tropical Tropopause Layer long- and short-lived chemical species
2010/8/16
Rates for large-scale vertical transport of air in the Tropical Tropopause Layer (TTL) were determined using high-resolution, in situ observations of CO2 concentrations in the tropical upper troposphe...
Tropospheric photooxidation of CF3CH2CHO and CF3(CH2)2CHO initiated by Cl atoms and OH radicals
Tropospheric photooxidation CF3CH2CHO Cl atoms OH radicals
2010/2/21
The absolute rate coefficients for the tropospheric reactions of chlorine (Cl) atoms and hydroxyl (OH) radicals with CF3CH2CHO and CF3(CH2)2CHO were measured as a function of temperature (263–371 K) a...
Hemispheric average Cl atom concentration from 13C/12C ratios in atmospheric methane
Hemispheric average Cl atom concentration 13C/12C ratios atmospheric methane
2009/3/10
Methane is a significant atmospheric trace gas in the context of greenhouse warming and climate change. The dominant sink of atmospheric methane is the hydroxyl radical (OH). Recently, a mechanism for...
Kinetic isotope effects in the gas phase reactions of OH and Cl with CH3Cl, CD3Cl, and 13CH3Cl
Kinetic isotope effects gas phase reactions 13CH3Cl
2009/2/17
The kinetic isotope effects in the reactions of CH3Cl, 13CH3Cl and CD3Cl with OH radicals and Cl atoms were studied in relative rate experiments at 298±2 K and 1013±10 mbar. The reactions were carried...
Transfer of organic Br and Cl from the Biosphere to the Atmosphere during the Cretaceous/Tertiary Impact: Implications for the stratospheric Ozone Layer
organic Br Cl Biosphere Atmosphere stratospheric Ozone Layer
2009/1/23
Following the Cretaceous/Tertiary (K/T) meteoritic impact some 65Myr ago, large portions of aboveground terrestrial biomass were burned. As a result, large amounts of various trace gases were injected...
Tropospheric OH and Cl levels deduced from non-methane hydrocarbon measurements in a marine site
Tropospheric OH Cl levels non-methane hydrocarbon marine site
2008/12/18
In situ continuous hourly measurements of C2–C8 non-methane hydrocarbons (NMHCS) have been performed from March to October 2006 at two coastal locations (natural and rural) on the island of Crete, in ...
ISORROPIA II: a computationally efficient thermodynamic equilibrium model for K+–Ca2+–Mg2+–NH4+–Na+–SO42−–NO3−–Cl−–H2O aerosols
thermodynamic equilibrium model aerosol
2008/12/18
This study presents ISORROPIA II, a thermodynamic equilibrium model for the K+–Ca2+–Mg2+–NH4+–Na+–SO42−–NO3−–Cl−–H2O aerosol system. A comprehensive evaluation of its performance is ...