Fluxes of molecular iodine (I2) released from the reaction of ozone with seawater - a laboratory study, June - December 2018.

Deposition of ozone to the ocean's surface removes ozone from the atmosphere. This reaction also releases molecular iodine (I2) and hypoiodous acid (HOI), and is thought to be the largest emission source of iodine compounds into the marine boundary layer (MBL). This dataset reports iodine mixing ratios and iodine emission rates from laboratory experiments that reacted ozone with aqueous solutions containing various iodide concentrations; the results are useful for constraining models of iodine release into the MBL. Our experiments used either (i) natural samples of subsurface seawater (SSW) and the surface microlayer (SML) collected off the North Yorkshire coast, or (ii) synthetic seawater (potassium halide solutions prepared in distilled water from laboratory reagents, and buffered at pH 8). All results were obtained at 17 degrees C. Thomas Adams, Lloyd Hollis and Stephen Ball (Leicester) and Liselotte Tinel (York) performed the experiments between June and December 2018 at the School of Chemistry, University of Leicester, UK. This work was part of the NERC project "Iodide in the ocean: distribution and impact on iodine flux and ozone loss" (NE/N009444/1, PI: Dr Stephen Ball, University of Leicester, in collaboration with Prof Lucy Carpenter, University of York).

臭氧在海洋表面的沉降过程会将臭氧从大气中清除。该反应同时会释放分子碘（molecular iodine, I₂）与次碘酸（hypoiodous acid, HOI），被认为是向海洋边界层（marine boundary layer, MBL）排放碘化合物的最大来源。本数据集收录了实验室反应实验中的碘混合比与碘排放速率数据：将臭氧与含不同碘化物浓度的水溶液进行反应，所得结果可用于约束海洋边界层内碘释放的相关模型。本实验采用两类实验样本：(i) 从北约克郡海岸采集的地下海水（subsurface seawater, SSW）与表层微层（surface microlayer, SML）天然样本；(ii) 合成海水——即采用实验室试剂在蒸馏水内配制的卤化钾溶液，并将pH值缓冲至8。所有实验均在17摄氏度条件下开展。实验由托马斯·亚当斯、劳埃德·霍利斯与斯蒂芬·鲍尔（莱斯特大学）、莉泽洛特·蒂内尔（约克大学）于2018年6月至12月间，在英国莱斯特大学化学学院完成。本研究隶属于NERC项目“海洋中的碘化物：其分布及对碘通量与臭氧损耗的影响”（项目编号：NE/N009444/1，项目负责人：莱斯特大学斯蒂芬·鲍尔博士，合作方：约克大学露西·卡彭特教授）。