Atmospheric visibility measurements at Hartheim Forest Research Site (DE-Har) from 2024-01-01 to 2024-12-31 [L2]

Quality controlled and gap-filled continuous atmospheric visibility data (Meteorological Observable Range MOR) measured above the forest canopy on a tower at Hartheim Forest Research Site (ICOS Associate Ecosystem Site DE-Har, UFR Code: HARTHM, 7.59814ºE, 47.93391ºN, 201 m) using an a forward scatter system (CS125, Present Weather and Visibility sensor, Campbell Scientific Inc.) operated 20 m above ground level. Quality controlled atmospheric visibility data are available and aggregated at 10min, 30min, hourly, daily, monthly and yearly resolution for the year 2024. Average, minimum and maximum visibility are provided on hourly, daily, monthly and annual scales. Hours and days with at least one minute of a visibility of less than 20, 10, 4, 2, 1, 0.5 and 0.2 km based on the WMO classes are provided on daily, monthly and annual scales. Can be used to determine frequency of fog conditions. Hours and days with at least one minute of a visibility of greater than 50 km are provided on daily, monthly and annual scales. Maximum visibility output by the CS125 is 75 km, so a value of 75 km means greater or equal 75 km. Averaged visibility accounts for values greater than 75 km with 75 km. Detailed information on gap-filled data is provided. Note: All times are provided in UTC, not local time. For more details read `HARTHM_2024_Visibility_MetaData.txt`. Version 1.1 Now contains also data at 10 min resolution. Version 1.2 corrects for an error in the file "..._Visibility_10min_UTC.csv" where in the previous version (1.0) the time axis encountered an overflow after August 15. This did not affect other files at 30 min, hourly, daily, monthly and yearly resolutions. Version 1.1 also fixes a minor column labelling issue in the yearly file "...Visibility_Yearly_UTC.csv". displays times according to ISO 8610 to unambiguously identify that all times are given in UTC. Further, the column headers for the time periods have been changed to "From" and "To" to indicate the start and end of the aggregation periods.本数据集包含经质量控制与间隙填充处理的连续大气能见度数据（气象观测能见距Meteorological Observable Range, MOR），采集自哈特海姆森林研究站（ICOS附属生态站DE-Har，UFR代码：HARTHM，坐标7.59814°E，47.93391°N，海拔201米）的塔架森林冠层上方，采用安装于地面以上20米处的前向散射系统（CS125型当前天气与能见度传感器，坎贝尔科学公司生产）获取。 2024年的经质量控制大气能见度数据已按10分钟、30分钟、小时、日、月、年不同时间分辨率聚合存储。 各时间尺度（小时、日、月、年）均提供能见度的平均值、最小值与最大值。 按日、月、年尺度统计了满足以下条件的时长与天数：至少有1分钟能见度低于20、10、4、2、1、0.5及0.2 km（符合世界气象组织World Meteorological Organization, WMO分级标准），可用于研判雾天发生频率。 按日、月、年尺度统计了至少有1分钟能见度高于50 km的时长与天数。 CS125传感器的最大可测能见度为75 km，因此数据中75 km的取值代表实际能见度大于或等于75 km；对于高于75 km的能见度值，在平均计算时统一以75 km替代。 数据集提供了间隙填充数据的详细说明。 注意：所有时间均采用协调世界时（UTC）标注，而非当地时间。 如需获取更多细节，请查阅`HARTHM_2024_Visibility_MetaData.txt`文件。 版本1.1 本版本新增10分钟分辨率数据。 版本1.2 修复了"..._Visibility_10min_UTC.csv"文件中的时序错误：旧版本（1.0）中该文件的时间轴在8月15日后出现溢出问题，该问题未影响30分钟、小时、日、月、年分辨率的其他数据文件。版本1.1同时修复了年度数据文件"...Visibility_Yearly_UTC.csv"中的一处次要列标签错误。 时间格式遵循ISO 8610标准，以明确标注所有时间均采用协调世界时；此外，时间聚合周期的列标题已更改为"From"与"To"，以清晰说明聚合时段的起止范围。