CAFE-Brazil Umbrella – Chemistry of the Atmosphere: Field Experiment in Brazil

CAFE-巴西光环任务(大气化学：现场实验巴西)将于2022年12月/2023年1月在亚马逊盆地上空进行。Halo科考机的作业基地将设在巴西的马瑙斯。巴西CAFE的主要目标是研究亚马逊雨林上空原始条件下热带对流层氧化剂的光化学以及粒子的形成和生长机制。我们的目标是研究在低浓度和闪电升高的NOx浓度下，VOC排放如何影响氧化化学、自由基循环，以及这如何与新颗粒形成、气溶胶丰度、颗粒组成和CCN联系在一起。这位来自法兰克福歌德大学的大学合作伙伴计划运行一台化学电离大气压力飞行时间质谱仪(CI-API-TOF)，该仪器将能够测量树木排放的萜烯氧化产生的气态高度氧化分子以及气态硫酸。CI-APiTOF是对巴西CAFE独特仪器的补充，将是识别亚马逊盆地上方深对流外流中导致气溶胶成核的化合物的关键仪器。

The CAFE-Brazil HALO mission (Chemistry of the Atmosphere: Field Experiment Brazil) will be conducted over the Amazon basin in Dec 2022/Jan 2023. The operational base of the HALO research aircraft will be in Manaus, Brazil. The main objectives of CAFE-Brazil are to study tropical tropospheric oxidant photochemistry in combination with particle formation and growth mechanisms under pristine conditions over the Amazon rainforest. We aim to investigate how VOC emissions influence oxidation chemistry at low and lightning-elevated NOx concentrations, radical cycling, and how this links to new particle formation, aerosol abundance, particle composition and CCN. The university partner from Goethe University Frankfurt plans to operate an Chemical Ionization Atmospheric Pressure interface Time Of Flight Mass Spectrometer (CI-APi-TOF) that will be able to measure gaseous highly oxidized molecules that result from oxidation of terpenes emitted by trees, as well as gaseous sulfuric acid. The CI-APiTOF complements the unique instrumentation of CAFE-Brazil and will be the key instrument to identify the chemical compounds that cause aerosol nucleation in the outflow of deep convection above the Amazon basin.