Coastal Solar Irradiance Interval Forecasting Dataset for RADSD

The primary experimental area is located in Ningbo, Zhejiang Province, China (121.11°E, 30.29°N), situated on the southern wing of the Yangtze River Delta and adjacent to the East China Sea. This region features a subtropical monsoon climate with distinct seasons, significantly influenced by plum rains and typhoons. Due to pronounced land-sea thermal differences, Ningbo exhibits a typical land-sea breeze system, whose induced rapid meteorological variations pose challenges for solar irradiance interval forecasting.

To further validate the geographical adaptability of the RADSD model, we additionally selected Qingdao, Shandong Province (120.79°E, 36.44°N) in northern coastal China and Wenchang, Hainan Province (110.83°E, 19.94°N) in southern coastal China as comparative experimental areas. Qingdao features a temperate monsoon climate with cold, dry winters and warm, humid summers, while Wenchang exhibits a tropical monsoon climate characterized by year-round high temperatures, abundant rainfall, and frequent convective activities. These three cities represent different latitudinal zones and climate types along China's coastal regions, with significant variations in land-sea breeze characteristics, solar radiation patterns, and seasonal variation patterns, providing diverse testing environments for comprehensively evaluating the RADSD model's predictive performance under different coastal meteorological conditions.

The experimental data are sourced from the National Solar Radiation Database (NSRDB), with solar irradiance data collected at hourly sampling intervals. Following traditional Chinese solar terms, the data are divided into four seasons: spring (March 20 - June 20, 2020), summer (June 21 - September 21, 2020), autumn (September 22 - December 20, 2020), and winter (December 22, 2019 - March 19, 2020).