ASITs experiments data for the 2023 POLAR-CHANGE campaign

This file contains data from the February-March 2023 PolarChange campaign on board of the RV Hesperides. Expriments were leads in two Air-Sea Interface Tanks (ASITs) installed on deck and connected to a set of air analysis instruments. One of the ASITs was covered by a lid blocking UV radiation. Clean filtered air is continuously flushing the ASITs with a residence time of 40 minutes. Local seawater was either continuously introduced in half of the ASIT volume or stocked for several days. More details are available on Chamba et al. (submitted). The methodology of these ASITs experiments is described in Sellegri et al. (2023). Local_time is from Punta Arenas, Chile (UTC-3) The first columns presents data from the ship (lon; lat; wind speed and direction, air temperature and water temperature and salinity). Others measurements were done close to the Air-Sea-Interface-Tanks (ASITs) experiments with radiation and air temperature and humidity inside the ASITs. The same instrument set including QPTR-MS, various CPC, PSM and Ozone analyser was used for both ASITs, flushing air (filtered) and ambient air, monitored by a 4-way valve switching every 20 minutes. Position of the valve is indicated in columb valve_pos, 1= Control-ASIT, 2=Flushing-air, 3= noUV-ASIT, 4= Ambient-air本数据集包含2023年2-3月搭载于“赫斯佩里德斯号（RV Hesperides）”科考船的“极地变化（PolarChange）”航次所获取的观测数据。实验于两套安装于甲板、外接多套大气分析仪器的海-气界面舱（Air-Sea Interface Tanks, ASITs）中开展。其中一套海-气界面舱加盖了可阻挡紫外辐射的遮光罩。清洁过滤后的空气以40分钟的停留时长持续吹扫两套舱体。现场采集的海水要么以持续注入的方式填充至舱体容积的一半，要么被留存数日。更多细节可参见Chamba等人（已投稿）的研究，相关实验方法详见Sellegri等人2023年发表的文献。 所有时间均采用智利蓬塔阿雷纳斯（Punta Arenas）时区（UTC-3）的当地时间。 数据集首列包含科考船的观测数据，依次为经度、纬度、风速与风向、大气温度、海水温度及盐度。 其余测量数据均在海-气界面舱实验附近同步获取，涵盖辐射观测、舱内大气温度与湿度。 两套海-气界面舱、吹扫过滤空气以及环境大气的观测均采用同一套仪器设备，包括QPTR-MS、各类CPC、PSM及臭氧分析仪。仪器通过每20分钟切换一次的四通阀完成多路样本的监测切换。 阀门的工作状态由valve_pos列标注：1代表对照舱（Control-ASIT），2代表吹扫空气通道，3代表无紫外辐射舱（noUV-ASIT），4代表环境大气通道。