【摘要】 光合有效辐射是生态学、农学以及气候学等学科研究中的一个关键因子。它是揭示相关物质与能量交换过程的基本生理变量；作为一种重要的气候资源，它在光合作用潜力、潜在的产量和作物生长模拟研究，土壤碳的固定模拟研究中扮演着不可缺少的角色。在创建本数据集时，首先根据“混合模型”，利用中国气象局常规观测数据模拟得到地面总辐射历史数据，然后由晴空指数（Ks）、太阳高度角和日照时数建立的光合有效辐射估算模块重构我国724个观测站日光合有效辐射数据。本数据集的时间范围为1961～2014年。更多还原

【Abstract】 Photosynthetically active radiation(PAR) plays important roles in ecology, agriculture and climatology research. It is a fundamental physiological variable that influences the mass-energy.exchange processes. As an important climatic resource, PAR provides indispensable data for calculating the potential photosynthesis, potential yield, crop growth and carbon cycle. In this study, we used in-situ measured data from the Chinese Ecology Research Network to develop a model for estimating PAR under allsky conditions. The “hybrid model” was used to calculate historical solar radiation based on routine observations by China Meteorological Administration. The solar radiation data were then applied with the PAR estimation model built upon clearness index, solar elevation angle and sunshine durations to obtain the historical daily PAR data at 724 routine stations from 1961 to 2014.更多还原