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

CAFE-Brazil HALO使命（大气化学：巴西实地实验）将于2022年12月/2023年1月在亚马逊盆地上空进行。HALO研究飞机的操作基地将设在巴西马瑙斯。CAFE巴西的主要目标是研究热带对流层氧化剂光化学，以及亚马逊雨林原始条件下的颗粒形成和生长机制。我们的目标是研究VOC排放如何影响氧化化学在低和闪电升高的NOx浓度，自由基循环，以及这如何链接到新的颗粒形成，气溶胶丰度，颗粒组成和CCN。来自歌德大学法兰克福的大学合作伙伴计划运行化学电离大气压接口飞行时间质谱仪（CI-APi-TOF），该质谱仪将能够测量由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补充了巴西CAFE的独特仪器，将成为识别亚马逊盆地上方深对流流出中引起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.