中国716个气象站光合有效辐射日均值数据集（1951-2010）

该数据集共包含717个文件，其中station.txt文件主要描述716个站的站点信息，每列分别对应为：经度、纬度和高程；另外以站号命名的716个文件对应716个站的数据，文件中每列分别为：年、月、日和日平均光合有效辐射。
该数据是基于中国气象局常规气象观测要素：温度、湿度、气压和日照时数等估算得到的。(1)算法和模型介绍:该模型发展了光合有效辐射（PAR）波段大气宽波段透过率参数化方案，在晴天情况下考虑了四种衰减过程，分别是：气溶胶的吸收和散射，水汽的吸收，臭氧的吸收和瑞利散射。在此基础上建立了晴空条件下地表PAR估算方案，同时利用日照时数作为衡量云对辐射影响的指标，参数化其对地表PAR的影响，进而估算全天空条件下地表PAR。经验证，估算结果数据集的均方根误差小于14W/m² 。

This dataset contains a total of 717 files. The station.txt file primarily documents the site information of 716 meteorological stations, with each column corresponding to longitude, latitude, and elevation, respectively. In addition, 716 files named after their respective station IDs correspond to the observational data of the 716 stations, where each column in the files represents year, month, day, and daily mean photosynthetically active radiation (PAR).

This dataset is derived through estimation based on routine meteorological observation elements from the China Meteorological Administration (CMA), including air temperature, relative humidity, atmospheric pressure, sunshine duration, and other relevant parameters.
(1) Algorithm and Model Introduction:
This model develops a parametric scheme for atmospheric broadband transmittance within the PAR band. Four attenuation processes are considered under clear-sky conditions: absorption and scattering by aerosols, absorption by water vapor, absorption by ozone, and Rayleigh scattering. Based on this, a surface PAR estimation scheme under clear-sky conditions is established. Meanwhile, sunshine duration is employed as an indicator to quantify the impact of clouds on radiation, and its effect on surface PAR is parameterized, thus enabling the estimation of surface PAR under all-sky conditions. Validated results demonstrate that the root mean square error (RMSE) of the estimated dataset is less than 14 W/m².

搜集汇总

背景与挑战

背景概述

该数据集提供了中国716个气象站1951-2010年的日平均光合有效辐射数据，基于温度、湿度、气压和日照时数等观测要素，通过参数化方案估算得到，考虑了气溶胶、水汽、臭氧和瑞利散射等衰减过程以及云的影响，均方根误差小于14W/m²。数据集包含站点信息文件和以站号命名的数据文件，覆盖中国广泛区域，适用于大气科学和太阳辐射相关研究。