主办单位:中国气象局沈阳大气环境研究所
国际刊号:ISSN 1673-503X
国内刊号:CN 21-1531/P

气象与环境学报 ›› 2024, Vol. 40 ›› Issue (3): 131-137.doi: 10.3969/j.issn.1673-503X.2024.03.016

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基于MODIS云量产品的湖北省格点日照时数计算

成驰(),崔杨,孟丹   

  1. 湖北省气象服务中心/湖北省气象能源技术开发中心, 湖北武汉 430074
  • 收稿日期:2023-11-14 出版日期:2024-06-28 发布日期:2024-08-09
  • 作者简介:成驰,1981年生,高级工程师,主要从事风能太阳能资源评价研究,E-mail: chc8108@126.com
  • 基金资助:
    湖北省自然科学基金气象创新发展联合基金(2022CFD017);中国气象局创新发展专项(CXFZ2023J044);中国烟草总公司湖北省公司重点科技项目(027Y2022-006)

Calculation of sunshine hours at grid points in Hubei province based on MODIS cloud products

Chi CHENG(),Yang CUl,Dan MENG   

  1. Hubei Provincial Meteorological Service Center/Meteorological Energy Development Center of Hubei Province, Wuhan 430205, China
  • Received:2023-11-14 Online:2024-06-28 Published:2024-08-09

摘要:

利用2019—2021年MODIS遥感云量资料, 基于地面气象观测日照百分率数据与卫星遥感云量之间存在的负相关关系, 按照不同月份、不同区域建立反演计算模型, 计算了湖北省1 km空间分辨率的月日照百分率和日照时数, 并选取代表性地面气象站观测资料对日照时数计算结果进行验证。结果表明: 湖北省各气候区月平均遥感云量与日照百分率之间均为极显著相关, 各代表站年日照时数计算相对误差均小于2%, 月日照时数计算值误差小于10 h, 表明构建的日照时数反演模型计算精度较高。计算得到湖北省年日照时数在854.8~1952.8 h。湖北省西南西部为日照时数最少的地区, 年日照时数低于1100 h; 湖北省东北北部和湖北省西北南部是日照时数最多的地区, 年日照时数大于1850 h。从日照时数反演结果中还可以发现, 受水陆热力条件差异影响, 湖北省平原地区湖泊水体云量比周边陆地偏少, 日照时数比周边陆地偏大。

关键词: 云量, 日照时数, 日照百分率

Abstract:

Using MODIS remote sensing cloud cover data from 2019 to 2021, based on the negative correlation between surface meteorological observation sunshine percentage and satellite remote sensing cloud cover, an inversion calculation model was established for different months and regions. The monthly sunshine percentage and sunshine hours at a spatial resolution of 1 km were calculated, and representative surface meteorological station observation data were selected to verify the calculation results of sunshine hours. The results show that there is a highly significant correlation between the monthly average remote sensing cloud cover and the percentage of sunshine in different climatic regions of Hubei province. The relative error in calculating annual (monthly) sunshine hours at each representative station is less than 2% (10 hours), indicating that the constructed sunshine hours inversion model has high calculation accuracy. The calculated annual sunshine hours in Hubei range from 854.8 hours to 1952.8 hours. The southwestern western regions of Hubei province have the lowest sunshine hours, with annual sunshine hours below 1100 hours. The northeastern northern and northwestern southern regions of Hubei province have the highest sunshine hours, with annual sunshine hours exceeding 1850 hours. From the inversion results of sunshine hours, it is also found that due to the thermal conditions differences between water and land, the cloud cover over lakes in the Hubei plain areas are less than that of surrounding land, and the sunshine hours are larger than that of surrounding land.

Key words: Cloud cover, Sunshine hours, Sunshine percentage

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