Long-term ice nucleating particle concentrations by offline vacuum diffusion chamber measurements from the Amazon, the Caribbean, Central Europe, and the Norwegian Arctic, data for figures 1-10

The data set reports on long-term measurements of ice nucleating particles (INPs) from four observational sites: 1. Amazon Tall Tower Observatory (ATTO, 2.144° S, 59.000° W, 130 m AMSL, Brazil), 2. Volcanological and Seismological Observatory of Martinique (OVSM, 14.735° N, 61.147° W, 487 m AMSL, Martinique, Caribbean), 3. Taunus Observatory (TO, 50.221° N, 8.446° E, 825 m AMSL, Germany) and 4. Zeppelin Observatory (ZO, 78.908° N, 11.881° E, 474 m AMSL, Ny-Alesund, Svalbard, Arctic). The presented data covers data from May 2015 to January 2017. Samples were usually collected every day or every two days at local noon for 50 minutes at 2 L min-1, resulting in 100 L of air volume. After transport samples were analyzed in our laboratory in Frankfurt using the vacuum diffusion chamber FRIDGE. Each sample was analyzed at multiple combinations of temperature ( 20 °C, -25 °C, and -30 °C) and relative humidity (95%, 97%, 99%, 101% w.r.t. water). INP concentrations per liter are reported for each condition (the paper focuses on the highest humidity). This data supplement is related to a scientific publication (doi:10.5194/acp-2020-667).

本数据集收录了4个观测台站的冰核粒子（ice nucleating particles, INPs）长期观测测量数据：1. 亚马逊高塔观测站（Amazon Tall Tower Observatory, ATTO，南纬2.144°，西经59.000°，海拔130米，巴西）；2. 马提尼克火山与地震观测台（Volcanological and Seismological Observatory of Martinique, OVSM，北纬14.735°，西经61.147°，海拔487米，加勒比海马提尼克岛）；3. 陶努斯观测站（Taunus Observatory, TO，北纬50.221°，东经8.446°，海拔825米，德国）；4. 齐柏林观测站（Zeppelin Observatory, ZO，北纬78.908°，东经11.881°，海拔474米，北极斯瓦尔巴群岛新奥尔松）。本次发布的数据覆盖2015年5月至2017年1月的观测时段。采样通常于当地正午开展，频次为每日或隔日，单次采样时长50分钟，采样流量为2升每分钟，单次采集空气体积达100升。样品经运输后，于研究团队设于法兰克福的实验室中，采用真空扩散舱FRIDGE完成分析。每份样品需在多组温度与相对湿度的组合条件下开展分析，其中温度参数原文或存笔误，结合冰核观测的低温场景，实际应为-20℃、-25℃与-30℃，相对湿度为相对于水相的95%、97%、99%、101%。本数据集报告了各条件下每升空气中的冰核粒子浓度，该学术论文重点关注最高湿度条件下的观测结果。本数据补充材料关联一篇学术论文，其DOI为10.5194/acp-2020-667。