Polluted Troposphere TORCH1: Tropospheric ORganic CHemistry Experiment (TORCH1) Ground-based Atmospheric Components Measurements Collection at Writtle College as part of the Polluted Troposphere Programme

The Polluted Troposphere Programme was a 5-year NERC thematic research programme which was centred upon the study of polluted boundary layer air and its transport to the free troposphere. The programme focussed on the regional scale, defined as intermediate between urban and hemispheric.

This dataset collection contains measurements of O3, CO, NO, NO2, C2-C8 hydrocarbons, C1-C4 oxygenated hydrocarbons, PAN, Peroxides (Organic and Inorganic), Organic nitrates, OH and HO2 radicals, Sum of RO2 + HO2 radicals, OH chemical lifetime, Photolysis frequencies (e.g. j(O1D), j(NO2), j (HCHO), Aerosol number and size distribution, Aerosol composition, Local meteorology, and 5 and 10 day back trajectories. Many of the instruments are also part of the Universities Facility for Atmospheric Measurement (UFAM).

TORCH 1 took place in July and August 2003 at Writtle College, near Chelmsford, Essex.

The goals were to provide both a detailed data set on organic composition in the polluted atmosphere, and to develop theoretical and modelling tools which may be used in defining future air quality policy.

污染对流层计划是一项为期五年的英国自然环境研究委员会（NERC）主题研究项目，其核心内容是对受污染的边界层空气及其传输至自由对流层的研究。该项目聚焦于区域尺度，这一尺度介于城市和半球尺度之间。本数据集收集了臭氧（O3）、一氧化碳（CO）、一氧化氮（NO）、二氧化氮（NO2）、C2-C8烃类、C1-C4含氧化合物、过氧乙酰硝酸酯（PAN）、有机过氧化物和无机过氧化物、有机硝酸盐、羟基（OH）和过氧自由基（HO2）、RO2+HO2自由基的总和、OH化学寿命、光解频率（例如j(O1D)、j(NO2)、j(HCHO)）、气溶胶数量和尺寸分布、气溶胶组成、局部气象学以及5天和10天的逆温轨迹。许多仪器也是大学大气测量设施（UFAM）的一部分。TORCH 1项目于2003年7月和8月在位于埃塞克斯郡切尔姆斯福德的Writtle学院举行。其目标是提供关于污染大气中有机组成的详细数据集，并开发理论工具和模型，这些工具和模型可被用于制定未来的空气质量政策。