摘要
利用2005～2011年的太阳辐射观测资料分析三江平原地区光合有效辐射（Qp）的时间变化特征及其与总辐射（Rs）比值（Qp/Rs）的变化规律，结果表明，Qp与Rs具有相同的季节变化特征；Qp日累计值的变化范围为60.47～0.11 mol m^-2 d^-1，年均值为23.76 mol m^-2 d^-1。Qp/Rs的变化范围为1.52～2.07 mol MJ^-1，年均值为1.91 mol MJ^-1。Qp/Rs和Qp季节变化一致，两者都是夏季最大，春秋次之，冬季最小。通过利用2011年的Qp观测数据、大气质量数与晴空指数的相互关系，建立了适合于估量三江地区 Qp的经验方程，估算值与观测值的相对误差在5.7%以内。
The variation of photosynthetically active radiation （Qp） and ratio of Qp to broadband solar radiation （Rs） at Sanjiang in Northeast China were analyzed on the basis of in situ data measured during 2005-2011. The results indicate that the seasonal and diurnal variation of Qp are similar to those of Rs. The daily values of Qp range from 0.11 to 60.47 mol m^-2, with an average annual value of 23.76 mol m^-2. The daily values of Qp/Rs range from 1.52-2.07 mol MJ^-1, with an average annual value of 1.91 mol MJ-1. The seasonal variation of Qp/Rs is similar to that of Qp. Qp and Qp/Rs reach a maximum in summer and a minimum in winter. An estimation equation for Qp was established on the basis of the optical air mass, clearness index, and Qp data measured in 2011. Evaluation of the results shows that this estimation equation can be used to calculate historical Qp data with a relative error within 5.7%.
出处
《气候与环境研究》
CSCD
北大核心
2014年第3期343-350,共8页
Climatic and Environmental Research
基金
国家自然科学基金41275165
41021004
关键词
光合有效辐射
估算方程
三江平原
Photosynthetically Active Radiation
Estimation equation
Sanjiang Plain
