Above-canopy solar irradiance measurements at Hartheim Forest Research Site (DE-Har) from 2017-01-01 to 2017-12-31 [L2]

Quality controlled and gap-filled continuous solar irradiance measurements at 16 m above ground level measured on a boom extending from the tower above the forest canopy at Hartheim Forest Research Site (ICOS Associate Ecosystem Site DE-Har, UFR Code: HARTHM, 7.59814ºE, 47.93391ºN, 201 m) measured using a ventilated pyranometer CM21 (Kipp & Zonen, Delft, Netherlands). The pyranometer was operated on the 30 m tower connected to a C23X data logger. Quality controlled above-canopy solar irradiance data are available and aggregated at 10min, 30min, hourly, daily, monthly and yearly resolution for the year 2017. Values are averages during the periods shown. Solar irradiance in this dataset is equal "global irradiance" or "global hemispherical irrandiance" and does not distinguish between direct and diffuse irradiance. Modeled extraterrestrial irradiance (based on the NOAA General Solar Position Calculations of the NOAA Global Monitoring Division and considering the Earth's elliptical orbit) is provided for comparison, along with the ratio of solar irradiance to extraterrestrial irradiance at 10min, 30min, hourly, daily, monthly and yearly resolution. Extraterrestrial irradiance is average of period show. Number of hours with solar irradiance >5 W/m2 (daylight hours) and > 120 W/m2 (sometimes used as threshold for "sun hours") provided on daily, monthly, and annual scale. Number of days with solar irradiance >5 W/m2 (quality check) and > 120 W/m2 ("sun hours") provided on monthly, and annual scale. Detailed information on gap-filled data is provided. Note: All times are provided in UTC, not local time. For more details read `HARTHM_2017_SolarIrradiance_MetaData.txt`.本数据集包含经质量控制与间隙填补的连续太阳辐照度实测数据，采集于哈特海姆森林研究站（ICOS关联生态站点DE-Har，UFR代码：HARTHM，东经7.59814°，北纬47.93391°，海拔201米）林冠上方塔架伸出的悬臂上，距地面高度16米。数据采集采用荷兰代尔夫特Kipp & Zonen公司生产的通风型总辐射表（ventilated pyranometer）CM21，该设备安装于30米塔架，并连接C23X数据记录仪。 本数据集提供经质量控制的林冠上方太阳辐照度数据，已聚合为2017年的10分钟、30分钟、小时、日、月及年分辨率数据，各数值为对应时段的平均值。 本数据集所收录的太阳辐照度等同于"总辐照度"或"半球总辐照度"，未区分直接辐照度与散射辐照度。 为便于对比，本数据集同时提供模拟得到的地外太阳辐照度（基于美国国家海洋和大气管理局（NOAA）全球监测分部的通用太阳位置计算方法，并考虑地球椭圆轨道），以及10分钟、30分钟、小时、日、月、年分辨率下的太阳辐照度与地外辐照度的比值。地外辐照度为对应时段的平均值。 数据集还提供了日、月、年尺度下，太阳辐照度大于5 W/m²（日照时长）以及大于120 W/m²（常被用作"日照小时数"阈值）的小时数统计。 此外还提供了月、年尺度下，太阳辐照度大于5 W/m²（质量校验用）以及大于120 W/m²（"日照小时数"）的天数统计。 本数据集提供了间隙填补数据的详细说明。 注：所有时间均采用协调世界时（UTC），而非当地时间。 如需获取更多详细信息，请查阅`HARTHM_2017_SolarIrradiance_MetaData.txt`。