Meteorological observations at Lincoln: 1993

Lincoln meteorological observations have been taken at a range of sites over the years. A NIWA report (Mullan, A.B; Stuart, S.J; Hadfield, M.G; Smith, M.J (2010). Report on the Review of NIWA's 'Seven-Station' Temperature Series. NIWA Information Series No. 78. pp.129-154) records a number of these along with the work undertaken to reconcile the data between different sites. It is not yet clear which site(s) these measurements were taken at as we have not yet identified a correspondence with NIWA's records.<br><br>The datasets had been stored as .DAT files. The .DAT files have been uploaded as is, and also standardised and converted into .csv format.<br><br>Headers: The original .DAT files were stored without headers. Most of these could be recovered for the .csv by running the data through an old program that had been used in conjunction with the data, but one column remains "unknown".<br><br>Missing data: In the .DAT files, missing measurements are variously recorded, depending on context, as 0, -9, -99 or (in the case of Cloud cover) 9. In the .csv these values have been removed and left blank.<br><br>Units are most likely:<br><br>* solar radiation - probably MJ/m2 (megajoules per square metre)<br>* temperatures - Celsius (in early years possibly converted from an original measurement in Fahrenheit)<br>* rainfall - millimetres<br>* cloud - oktas (eighths of the sky taken up by cloud)<br>* wind run - kilometres<br>* vapour pressure - probably Pa (pascals)

多年来，科研团队在林肯地区的多个观测站点开展了气象观测工作。新西兰国家水与大气研究所（NIWA）于2010年发布的一份报告（Mullan, A.B.、Stuart, S.J.、Hadfield, M.G.、Smith, M.J.，2010：《NIWA“七站”温度序列评估报告》，NIWA信息系列第78号，第129-154页）对其中多组观测数据以及为统一不同站点间数据所开展的整理工作进行了详细记录。目前尚未明确本次使用的观测数据对应哪一个或哪几个站点，因为尚未能将本次数据集与NIWA的相关记录进行匹配对应。

该数据集最初以.DAT格式文件存储。本次发布的内容既包含原始.DAT格式文件，也包含经过标准化处理并转换为.CSV格式的数据集。

表头信息：原始.DAT格式文件未包含表头。通过使用此前与该数据集配套使用的旧程序对数据进行处理，多数表头信息已可恢复至.CSV格式文件中，但仍有一列信息暂未明确，标记为"unknown"。

缺失值处理：在原始.DAT文件中，根据观测场景的不同，缺失的测量值分别以0、-9、-99进行记录，云量观测的缺失值则记为9。在转换后的.CSV文件中，上述缺失值已被移除，对应位置留空。

各观测项的单位推测如下：
* 太阳辐射：大概率为兆焦每平方米（MJ/m²）
* 气温：摄氏度（早期数据可能由华氏度转换而来）
* 降雨量：毫米
* 云量：八分度（oktas，即云量占天空的八分之一比例）
* 风程：千米
* 水汽压：大概率为帕斯卡（Pa）