周允华,项月琴,单福芝. 1984. 光合有效辐射(PAR)的气候学研究[J]. 气象学报, 42(4):387-397, doi:10.11676/qxxb1984.046
光合有效辐射(PAR)的气候学研究
A CLIMATOLOGICAL STUDY ON THE PHOTOSYNTHETICALLY ACTIVE RADIATION
投稿时间:1983-03-09  修订日期:1983-06-20
DOI:10.11676/qxxb1984.046
中文关键词:  
英文关键词:
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作者单位
周允华 中国科学院地理研究所农业生态系统试验站 
项月琴 中国科学院地理研究所农业生态系统试验站 
单福芝 中国科学院地理研究所农业生态系统试验站 
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中文摘要:
      根据我国8个地区11个测点的2878组直接辐射的分光测量资料,得到了计算直接辐射中0.4—0.7微米波段光合有效辐射(PAR)的经验公式。利用这个公式结合8个有地区代表性台站的日射资料,计算了1,4,7,10各月的直接辐射、散射辐射和总辐射中PAR所占的比例,结果表明。它们分别是0.394±0.04,0.49±0.04和0.444±0.03。我国以往的研究者在计算PAR总辐射时都把比例值取得偏高了。
英文摘要:
      A series of spectral measurements were made at eleven sites in eight regions to determine the photosynthetically active direct radiation between 0.4 and 0.7μ. From the measurements of 2878 sets an empirical formula for estimating the relative flux density ηS of the photosynthetically active direct radiation has been obtained. The climatological methods for estimating the relative flux densities, ηD and ηO, of the photosynthetically active diffuse radiation and the global radiation under various sky conditions were suggested.In terms of the solar radiation data of eight representative stations in China the relative flux densities in January, April, July and October were calculated, The monthly mean values calculated at eight stations are as follows ηS=0.39±0.04, ηD=0.49±0.04 and ηO=0.44±0.03.
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