The Chemistry of Inorganic Chlorine in the Marine Boundary Layer at Bermuda During Spring

小行星9415559 无机氯的化学性质及其对海洋边界层（MBL）氧化过程的影响是非常不确定的。 间接证据表明，C1原子可能是世界海洋上重要的氧化剂。 此外，最近的实地测量显示，在MBL中除了HCl（可能是HOC 1和/或C12）之外，还有大量的无机C1气体。 C1原子的前体被认为是来自海盐气溶胶（或极地地区的海冰）的反应，但海盐脱氯的机制知之甚少。 本研究将评估无机氯化学对MBL中臭氧、非甲烷碳氢化合物（NMHCs）、硫和氮循环的影响。 具体的研究目标包括：1）同时测量MBL氯化学中主要的反应物和产物种类以及相关的物理性质; 2）测试海盐气溶胶脱氯的假设机制; 3）评估MBL中C1原子和OH自由基作为氧化剂的相对重要性; 4）寻找由C1原子反应产生的独特产物化合物; 5）模拟MBL中无机C1化学及其对氧化能力的贡献。 将在百慕大的大气/海洋化学实验取样站，在为期4周的大约10个昼夜周期内对空气进行密集取样。 将测量反应性痕量气体（HCl *、C12*、HOC 1 *、NMHCs、有机卤化物、SO2、NHO 3、NO、NOx、NOy、O3和CO）、粒度分离气溶胶的化学成分（主要离子和痕量元素）、各种示踪剂和对流层气象学。

9415559 Keene The chemistry of inorganic chlorine and its influence on oxidation processes in the marine boundary layer (MBL) are very uncertain. Indirect evidence suggests that C1 atoms may be important oxidants over the world's oceans. In addition, recent field measurements reveal significant concentrations of inorganic C1 gases other than HC1 (probably HOC1 and/or C12) in the MBL. C1 atom precursors are thought to originate from reactions involving sea-salt aerosol (or possibly sea ice in polar regions), but mechanisms of sea-salt dechlorination are poorly understood. This study will assess the influence of inorganic chlorine chemistry on the cycling of ozone, non-methane hydrocarbons (NMHCs), sulfur, and nitrogen in the MBL. Specific research objectives include: 1) To measure simultaneously principal reactant and product species and related physical properties involved in MBL chlorine chemistry; 2) To test hypothesized mechanisms that dechlorinate sea-salt aerosol; 3) To assess the relative importance of C1 atoms and OH radicals as oxidants in the MBL; 4) To search for unique product compounds generated by C1 atom reactions; and 5) To model inorganic C1 chemistry and its contribution to oxidizing capacity in the MBL. Air will be intensively sampled during approximately 10 diel cycles over a 4-week period at the Atmosphere/Ocean Chemistry Experiment (AEROCE) sampling station on Bermuda. Reactive trace gases (HC1*, C12*, HOC1*, NMHCs, organic halides, SO2, NHO3, NO, NOx, NOy, O3, and CO), the chemical composition (major ions and trace elements) of size-segregated aerosol, a variety of tracers, and troposphere meteorology will be measured.