Above-canopy solar irradiance measurements at Hartheim Forest Research Site (DE-Har) from 2003-01-01 to 2003-12-31 [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 2003. 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_2003_SolarIrradiance_MetaData.txt`. Data prior to February 1 2003 is available only in hourly resolution. Data from February 1, 2003 to May 2, 2003 is gap filled as the station was not operational or data is no loger available.本数据集包含经质量控制与间隙填充的连续太阳辐射观测数据，观测高度为地面以上16米，部署于哈特海姆森林研究站（ICOS关联生态站DE-Har，UFR代码：HARTHM，东经7.59814°，北纬47.93391°，海拔201米）的林冠上方塔架悬臂上。观测采用通风型总辐射表（pyranometer）CM21（Kipp & Zonen，荷兰代尔夫特），该仪器安装于30米高的塔架，并连接C23X数据采集器（data logger）。 2003年的林冠上方太阳辐射数据已完成质量控制，可按10分钟、30分钟、小时、日、月、年的时间分辨率进行聚合，数据为对应时段的平均值。 本数据集所收录的太阳辐射等同于"总辐射"或"半球总辐射"，未区分直接辐射与散射辐射。 本数据集同时提供模拟的地外太阳辐射（extraterrestrial irradiance）数据，其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，用于对比分析；同时提供10分钟、30分钟、小时、日、月、年分辨率下的太阳辐射与地外太阳辐射的比值，地外太阳辐射值为对应时段的平均值。 提供每日、月、年尺度下，太阳辐射大于5 W/m²（日照时数）及大于120 W/m²（常作为"日照小时"阈值）的时长统计。 提供月、年尺度下，太阳辐射大于5 W/m²（质量校验标准）及大于120 W/m²（"日照小时"标准）的天数统计。 已提供间隙填充数据的详细说明文档。 注：所有时间均采用协调世界时（UTC），而非当地时间。 如需获取更多细节，请查阅`HARTHM_2003_SolarIrradiance_MetaData.txt`文件。 2003年2月1日之前的观测数据仅提供小时分辨率版本。 2003年2月1日至2003年5月2日的数据已完成间隙填充，因该时段站点未运行或原始数据已不可获取。