Intercomparison of total ozone measured by the Brewer and Dobson spectrophotometers at Toronto
Intercomparison of total ozone measured by the Brewer and Dobson spectrophotometers at Toronto
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DOI：
10.1029/jd093id09p11129
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发表时间：
1988-09
影响因子：
--
通讯作者：
J. Kerr;I. A. Asbridge;W. Evans
中科院分区：
文献类型：
--
作者：
J. Kerr;I. A. Asbridge;W. Evans
布鲁尔和多布森光谱分析仪一直在从加拿大臭氧监测网的五个站进行例行的同时直射太阳臭氧总量测量。记录最长的比对数据是在多伦多，那里驻扎着维护良好的加拿大区域标准多布森仪器77，布鲁尔仪器8于1983年2月开始在那里进行常规臭氧测量。给出了这种相互比较的结果，并讨论了产生微小差异的原因。为了保证臭氧记录的连续性和不受从Dobson仪器到Breyer仪器的转换的干扰，建立了一个合适的传递函数来计算从Breyer数据到Dobson臭氧数据。如果进行适当的修正，Dobson臭氧数值比Breaker臭氧数值大3.8%，日平均值之间的标准偏差为0.5%。在5年期间，两种仪器之间的相对漂移被发现为每年0.05%，小于95%的置信度估计的每年0.27%。
Both Brewer and Dobson Spectrophotometers have been taking routine simultaneous direct-Sun total ozone measurements from the five stations in the Canadian ozone monitoring network. The longest record of intercomparison data is at Toronto, where the well-maintained Canadian regional standard Dobson instrument 77 is stationed and where routine ozone measurements made by Brewer instrument 8 commenced in February 1983. Results of this intercomparison are presented, and the causes for minor differences are discussed. A suitable transfer function is developed to calculate simulated Dobson ozone data from the Brewer data in order to ensure that the ozone record remains continuous and uninterrupted by the transition from the Dobson to the Brewer instrument. With appropriate corrections applied, the Dobson ozone values are 3.8% greater than those of the Brewer, and the standard deviation between the daily mean values is 0.5%. The relative drift between the two instruments over the 5-year period was found to be 0.05% per year, smaller than the 95% confidence estimate of 0.27% per year.