| 崇伟,吕文华,丁蕾,边泽强.利用总辐射估算日照时数的方法研究[J].电子测量与仪器学报,2017,31(10):1543-1548 |
| 利用总辐射估算日照时数的方法研究 |
| Study on estimation method for sunshine duration using global radiation |
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| DOI：10.13382/j.jemi.2017.10.002 |
| 中文关键词: 日照时数 总辐射 晴朗指数 天顶角 |
| 英文关键词:sunshine duration global radiation clearness index zenith angle |
| 基金项目:公益性行业（气象）科研专项（GYHY201406037）资助 |
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| Author | Institution |
| Chong Wei | Meteorological Observation Center, China Meteorological Administration, Beijing 100081, China |
| Lv Wenhua | Meteorological Observation Center, China Meteorological Administration, Beijing 100081, China |
| Ding Lei | Meteorological Observation Center, China Meteorological Administration, Beijing 100081, China |
| Bian Zeqiang | Meteorological Observation Center, China Meteorological Administration, Beijing 100081, China |
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| 摘要点击次数: 2820 |
| 全文下载次数: 14923 |
| 中文摘要: |
| 介绍了一种由总辐射估算日照时数的方法，利用云南丽江太阳能资源观测站总辐射表和直接辐射表观测的总辐射和直接辐射资料，以总辐射和地球外总辐射求得晴朗指数，以直接辐射大于120 W/m2的时间累积作为日照时数参考标准值，分析晴朗指数和日照时数之间的关系，采用分段拟合的方法，得到由总辐射估算日照时数的分段函数关系。通过丽江观测数据验证，由总辐射计算得到的日照时数与直接辐射表观测的日照时数之间的线性相关系数达到0.992 3，具有良好的相关性，两者之间月累计误差0.07 h，月内每日误差的均方根误差为0.5 h，能够较好地由太阳总辐射估算出日照时数。 |
| 英文摘要: |
| A pyranometric method for determination of sunshine duration is proposed. Global solar radiation measured with pyranometer and direct solar radiation measured with pyrheliometer at Solar Energy Resource Observation Station in Lijiang, Yunnan province is used. The clearness index is set as an independent variable which is calculated from the ratio of global solar radiation to extraterrestrial solar radiation, the sum of the time, for which the direct solar irradiance exceeds 120 W/m2, is set as the sunshine duration reference. The relationship between clearness index and sunshine duration is analyzed, and the piecewise function is obtained by segmentation fitting for estimating sunshine duration. Though the verification of the observation date in Lijiang, the sunshine duration reference and sunshine duration estimated by the method have good correlation, the coefficient between the two sunshine durations is up to 0.992 3, the difference of the month summation is 0.07 h, the root mean squared deviation of daily differences in a month is 0.5 h. And the method has a good performance to estimate the sunshine duration. |
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