Meteorological observations at Lincoln: 1994

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，科研人员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（National Institute of Water and Atmospheric Research, NIWA）于2010年发布的一份报告（Mullan, A.B; Stuart, S.J; Hadfield, M.G; Smith, M.J. 《NIWA“七站点”温度序列评估报告》，NIWA信息系列第78号，第129-154页）记录了其中部分观测站点的相关信息，以及为统一不同站点观测数据所开展的校准工作。但目前尚未明确本次观测数据对应的具体站点，因尚未能将其与NIWA的存档记录建立对应关系。

该数据集最初以.DAT格式存储。本次发布既保留了原始.DAT格式文件的原样上传，也将其标准化并转换为.CSV格式文件。

列标题：原始.DAT文件未存储列标题信息。通过配套的老旧数据处理程序对数据进行解析，可恢复其中绝大多数列的标题，但仍有一列的标题暂未明确，标注为"unknown"。

缺失值处理：在.DAT文件中，根据观测项的不同，缺失的测量值分别以0、-9、-99作为占位符记录（云量数据的缺失值则用9表示）。在转换后的.CSV文件中，这些占位符已被移除，对应位置留空。

各观测项的单位推测如下：
* 太阳辐射：单位大概率为兆焦耳每平方米（MJ/m²）
* 气温：单位为摄氏度（早期数据可能由华氏度转换而来）
* 降雨量：单位为毫米
* 云量：单位为八分云量（oktas，即云遮蔽天空的比例以八分之一天空为单位）
* 风程：单位为千米
* 水汽压：单位大概率为帕斯卡（Pa）