| 杨帆,吴古会.FY-4A辐射产品在贵州山区的检验与订正[J].沙漠与绿洲气象,2024,18(1):134~140 |
| FY-4A辐射产品在贵州山区的检验与订正 |
| Verification and Correction of FY-4A Solar Radiation Products in Guizhou Mountainous Areas |
| 投稿时间：2022-07-12 修订日期：2022-09-13 |
| DOI： |
| 中文关键词: 地面入射太阳辐照度 贵州山区 检验 FY-4A 多元线性回归 |
| 英文关键词:solar irradiance Guizhou Mountainous Areas verification FY-4A multiple linear regression |
| 基金项目: |
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| 摘要点击次数: 527 |
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| 中文摘要: |
| 本文利用2018年3月12日—2019年2月28日近一年(2018年春季—冬季)贵州山区（从江、三穗、桐梓、贵阳、紫云、兴仁、威宁7站）地面太阳辐照度观测资料对FY-4A反演辐照度进行检验与订正分析。结果表明：（1）卫星反演辐照度取值范围比地面观测小，整体而言反演辐照度偏高，晴空条件下反演精度远高于云条件，正午偏差最小，下午偏差最大。（2）卫星反演辐照度与地面观测辐照度具有较为一致的日变化和季节变化，两者呈显著正相关，相关系数随海拔高度呈负相关。（3）平均偏差往往随着地面观测的增大而减小，当地面观测辐照度大于800 W?m-2时，反演辐照度往往偏小。（4）对地面观测辐照度进行阈值划后，用多元线性回归方法对反演辐照度订正，订正后的产品在贵州具有较好的适用性。 |
| 英文摘要: |
| Based on the ground observation data of national meteorological stations (Congjiang, Sansui, Tongzi, Guiyang, Ziyun, Xingren and Weining stations) in the Guizhou mountainous areas from March 12, 2018 to February 28, 2019 (spring to winter 2018), this paper tried to examine and correct the accuracy of FY-4A SSI products, and the results are as follows: (1) The value range of FY-4A SSI products is smaller than that of the ground observations. On average, the FY-4A SSI of each station is higher than that of ground observations, and the accuracy under clear sky conditions is much higher than that under cloudy conditions. Generally speaking, the deviation at noon is the smallest, while the deviation in the afternoon is the largest. (2) The FY-4A SSI and the ground observed SSI have relatively consistent diurnal and seasonal variations. There is a significant positive correlation between the two, and the correlation coefficient is negatively correlated with altitude. (3) The average deviation tends to decrease with the increase of ground observation. When the ground observed SSI is greater than 800 W?m-2, the FY-4A SSI tends to be smaller than that of ground observation. (4) Correction of FY-4A SSI by multiple linear regression method after the threshold division of the ground observed SSI can achieve good correctional results. After revision, the radiation products can have good application in Guizhou mountainous areas. |
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