NWS DAILY CLIMATOLOGY DATA: 1989 (SNF)

Weather data were collected by the National Weather Service in International Falls, Minnesota. International Falls is about 80 miles from the SNF, but the weather data is representative of the area. Total solar insolation measurements were made at Fall Lake Dam in Winton, Minn. by Prof. Donald Baker of the Department of Soil Science at the University of Minnesota, St. Paul. Insolation values were measured using a Yellow Springs solar cell calibrated against an Eppley Pyranometer.

气象数据由美国国家气象局（National Weather Service）于明尼苏达州国际瀑布市（International Falls）采集。该市距离SNF约80英里，但所获气象数据可代表该区域的气候特征。总太阳辐射（Total solar insolation）数据由明尼苏达大学圣保罗分校土壤科学系唐纳德·贝克（Donald Baker）教授，于明尼苏达州温顿市瀑布湖大坝（Fall Lake Dam）处采集测定。该辐射强度数值通过黄斯普林斯（Yellow Springs）太阳能电池测得，此设备已通过埃普利总日射表（Eppley Pyranometer）完成校准。