Semi-quantitative daily surface ozone observations from station Infante-D-Luiz

The dataset consists of a set of semi-quantitative surface ozone observations (hereinafter O3), together with relative humidity observations at the same temporal scales. The dataset consists of daily mean observations from 19 observatories. The daily observations consisted either of one daily observation from a 24-hour strip exposure between 3 PM of consecutive days or two daily observations from a 12-hour strip exposure from 9 AM to 9 PM and 9 PM until 9 AM of the following day. The datasets are from the period 1872 to 1888. They're extensions in times range between 17 and 3 years. The other dataset from the Observatory Infante D. Luiz, the longest semi-quantitative surface ozone observations data series known to date, spans 50 years for daily data (1863 to 1913). For more details see Tables 2a and 2b (Añel et al., 2024). The O3 observations were recovered and manually digitalized from the Annaes do Observatory Infante D. Luiz published between 1863 and 1915 (Fradesso da Silveira, 1863; De Almeida, 1915). The O3 observations were part of the regular meteorological observations conducted at Portugal and former colonies network of meteorological observatories and outstations controlled by the Infante D. Luis Meteorological Observatory (Lisbon), created in 1857 (Raposo, 2017). Geographically the dataset consists of O3 observations between 42°N and 9°S in latitude and 27°W and 15°E. Observatories are located at the Iberian Peninsula and in Africa. Three of those observatories are insular, two at the Azores islands and one at Madeira Island. The O3 observations were conducted using Schönbein test-paper method, also called \"ozonoscope\". It was based on the color-change of an indicator strip of blotting paper coated with starched potassium iodide. The paper strip was exposed to air between 8 and 24 hours protected from solar radiation and rain. The method applied in the Portuguese observatories was the one from Berigny (1958) who defined the operating procedure, introducing a more precise chromatic scale graduated from 0 to 21 and selected he best quality of impregnated paper. That on was the Berzelius paper manufactured by James a chemist at Sédan (Marenco et al, 1994) that is often referred in logbooks containing measurements as the cale of \"James de Sédan\". (Añel et al., 2024).

本数据集包含一组半定量地表臭氧观测数据（以下简称O3），以及相同时间尺度的相对湿度观测数据。数据来源于19个观测站的日均值观测结果，日观测数据的获取方式分为两种：其一为连续两日下午3点间24小时条带暴露的单次观测；其二为上午9点至晚上9点、晚上9点至次日上午9点两个12小时条带暴露的两次观测。数据集的时间范围为1872年至1888年，各观测站的时间跨度介于17年至3年之间。此外，Infante D. Luiz天文台提供了目前已知最长的半定量地表臭氧观测序列，其日数据跨度达50年（1863–1913年），更多细节可参见Tables 2a与2b（Añel等，2024）。O3观测数据是从1863–1915年出版的《Annaes do Observatory Infante D. Luiz》中恢复并手动数字化得到的，这些观测属于葡萄牙及其前殖民地气象观测站与分站网络的常规气象观测内容，该网络由1857年成立的Infante D. Luis气象天文台（里斯本）负责管理。从地理范围来看，数据集的O3观测覆盖北纬42°至南纬9°、西经27°至东经15°区域，观测站分布于伊比利亚半岛与非洲，其中3个为岛屿观测站（2个位于亚速尔群岛，1个位于马德拉岛）。O3观测采用舍恩拜因试纸法（Schönbein test-paper method），又称“臭氧测定仪（ozonoscope）”，该方法基于涂有淀粉碘化钾的指示纸条的颜色变化原理，纸条需在避光避雨条件下暴露于空气中8至24小时。葡萄牙观测站采用的是Berigny（1958）定义的操作流程，该流程引入了0至21级的高精度色谱，并选用了Sedan化学家James制造的Berzelius浸渍纸（Marenco等，1994）——在包含测量数据的日志中，这种试纸常被称为“James de Sedan”刻度（Añel等，2024）。