研究目的
To evaluate the cloudiness contribution in estimating the impact on global solar radiation during the longest total solar eclipse of the 21st century at Tianhuangping (Zhejiang), China, on July 22, 2009.
研究成果
The empirical model for global solar radiation under cloudy sky conditions during the total solar eclipse at Tianhuangping is acceptable and representative of the expected conditions. The study highlights the importance of in situ cloudiness observations for future eclipse studies.
研究不足
The study was limited by the lack of direct solar radiation measurements and detailed cloudiness observations during the eclipse. The empirical model's accuracy depends on the cloudiness evaluation from video recordings, which may not capture all variability in cloud optical depth.
1：Experimental Design and Method Selection:
Applied a cloud-cover empirical model to obtain the global solar radiation and deduced a theoretical model for direct solar radiation including occultation and obscuration functions of the eclipse, considering limb-darkening and atmospheric transmission.
2：Sample Selection and Data Sources:
Used observations from the total solar eclipse at Tianhuangping, China, on July 22, 2009, including cloudiness evaluation from video recordings.
3：List of Experimental Equipment and Materials:
Utilized video recordings for cloudiness evaluation and theoretical models for solar radiation calculations.
4：Experimental Procedures and Operational Workflow:
Evaluated cloudiness from video recordings, applied empirical and theoretical models to estimate solar radiation under eclipse conditions.
5：Data Analysis Methods:
Compared global solar radiation models under cloudy and clear sky conditions during the eclipse.
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