Provisional monthly mean ozone values for Halley between 1956 and 1985

Monthly averaged total ozone values measured at Halley station, Antarctica. All measurements are in Dobson Units. These monthly averages are a flat average of any daily average values that exist for each given month; the daily averages are a flat average of the measurements obtained during a particular 24-hour period (UTC). The number of observations may vary from day to day. The Dobson ozone observing season at Halley begins at the end of August and ends in mid April; however, very early and late season observations are made with the Sun at low elevation, and are less accurate than those made during the main observing period of September 6 to April 6. The values for 1956/57 (MacDowall, J., 1962) and 1957-1973 (Farman, J. C. and Hamilton, R. A., 1975) have been approximately corrected from the original using the WMO recommended guidance (Komhyr, W. D., Mateer C. L. and Hudson, R. D., 1993) for the Bass-Paur ozone absorption coefficients. Ozone values from 1973 onwards have been calculated using the Bass-Paur coefficients. The approximation of a US standard atmosphere, which will differ from the Antarctic atmosphere, has been used and the assumed temperature used for the absorption coefficients may be inaccurate.

本数据集为南极哈雷站（Halley Station）测得的月平均总臭氧值，所有测量单位均为多布森单位（Dobson Units）。本次月平均值为对应月份内所有可用日平均值的简单平均；日平均值则为特定24小时时段（协调世界时UTC）内获取的观测值的简单平均。每日的有效观测次数或存在波动。哈雷站的多布森臭氧观测季始于8月末，止于4月中旬；但观测季初期与末期的太阳高度角较低，其观测精度低于9月6日至4月6日的主观测时段数据。1956/1957年（MacDowall, J., 1962）与1957年至1973年（Farman, J. C. 及 Hamilton, R. A., 1975）的臭氧值，已依据世界气象组织（WMO）推荐的Bass-Paur臭氧吸收系数校正指南（Komhyr, W. D., Mateer C. L. 及 Hudson, R. D., 1993）对原始数据完成近似校正。1973年及之后的臭氧值均采用Bass-Paur系数计算得到。本数据集采用了与南极大气存在显著差异的美国标准大气近似模型，且用于计算吸收系数的假设温度可能存在误差。