【摘要】 平流层臭氧层变薄导致地面紫外辐射增加,紫外辐射的生态、气候学及环境效应使太阳紫外辐射的观测研究逐渐成为辐射研究的前沿问题。地基紫外辐射联网观测是获得紫外辐射时空分布的基础,而定期进行辐射表的标定是获取正确的、具有可比性的观测数据的基本保证。利用USB2000紫外/可见辐射光谱仪,采用标准灯传递能量的标定方法建立了紫外辐射表和光合有效辐射表标定系统,标定后的紫外辐射表不确定度为5%,光合有效辐射表不确定度为5%,能够很好地满足世界气象组织标准。该标定方法简单易行、运行费用低且精度较高,能够很好地进行中国辐射观测网中紫外与光合有效辐射表的标定工作。更多还原

【Abstract】 There has been a great interest in ultraviolet radiation (UV) due to the increasing of UV reaching the Earth’s surface as a consequence of the thinning of the stratospheric ozone, and the influence of UV on ecosystem, climate change and environment. In order to obtain spatial distribution characteristics of UV, a ground-based UV measurement network must be established in the national wide. Routine calibration is the primary work to ensure the accuracy and comparability of measurement data. Standard radiative lamp and spectroradiometer (USB2000-UV-VIS) are used to establish broadband UV radiometer and quantum sensor calibration system. The accuracy of the calibrated broadband UV radiometer is within 5%, which meets the World Meteorological Organization (WMO) criterion of UV radiation study. The accuracy of the calibrated quantum sensor is within 5%. This accuracy is up to the WMO criterion of photosynthetically active radiation study. This reliable, accurate and inexpensive calibrate system can be applied to radiation measurement network in China.更多还原