Development of fast ozone detectors for measurement of ozone fluxes from ship and airborne platforms

模式计算表明，海洋干沉积有可能使表面臭氧混合比降低数ppb，这一幅度足以影响人类接触并对生态系统和农作物产量产生影响。然而，O3沉积到海洋的速度是高度不确定的，因为对机理细节的了解非常少。该项目部署了一个基于臭氧+一氧化氮（NO）化学发光反应的涡动相关-快速响应臭氧探测器，用于舰载和陆基野外活动，包括在百慕大的都铎山海洋大气观测站和在热带大西洋的佛得角大气观测站。这将使观测季节O3通量时间序列和更好地了解海洋O3沉积机制成为可能。该项目的第二个目标是在NASA新开发的快速臭氧实验（ROZE）的基础上建立一个腔增强紫外吸收O3仪器。这种高精度，快速时间响应仪器特别适合于飞机测量O3通量（使用涡动相关技术）。该仪器的性能将在WACL实验室中进行表征，以证明其安装在英国FAAM飞机上的适用性。一旦安装在飞机上，将有机会在至少一次空中野战中部署快速飞机O3传感器。

Model calculations show that ocean dry deposition has the potential to reduce surface O3 mixing ratios by several ppb, which is of a magnitude where it can influence human exposure and impact on ecosystems and agricultural crop yields. However, O3 deposition velocities to the ocean are highly uncertain with very poor knowledge of the mechanistic details. This project deploy an eddy covariance - fast response ozone detector based on the ozone + nitric oxide (NO) chemiluminescence reaction on ship-based and ground-based field campaigns, including at the Tudor Hill Marine Atmospheric Observatory in Bermuda and at the Cape Verde Atmospheric Observatory in the tropical Atlantic ocean. This will allow observations of seasonal O3 flux time series and a better understanding of the mechanisms of oceanic O3 deposition. The second aim of this project is to build a Cavity-Enhanced UV Absorption O3 instrument based on the newly developed NASA Rapid Ozone Experiment (ROZE). This high precision, fast time response instrument is particularly well suited to aircraft measurements of O3 fluxes (using the eddy covariance technique). The performance of this instrument will be characterisde in the WACL laboratories to demonstrate its suitability for installation on the UK FAAM aircraft. There will be opportunities to deploy the fast aircraft O3 sensor on at least one airborne field campaign once it has been installed on the aircraft.