Meteorological observations at Lincoln: 2002

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)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多个站点开展了气象观测工作。一份新西兰国家水与大气研究所（NIWA）的报告（Mullan, A.B、Stuart, S.J、Hadfield, M.G、Smith, M.J，2010年。《NIWA“七站点”温度序列审查报告》，NIWA信息系列第78号，第129-154页）记录了其中多组观测数据，以及为协调不同站点间数据一致性所开展的相关工作。目前尚未明确本次观测数据对应的具体站点，因为尚未能将其与NIWA的记录建立对应关联。

本数据集最初以.DAT格式存储。本次上传既保留了原始.DAT文件的原样副本，也提供了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文件未存储表头信息。通过使用曾与该数据集配套使用的旧程序对数据进行处理，可恢复绝大多数.csv格式文件的表头，但仍有一列的表头信息未知。

缺失值处理：在.DAT文件中，根据不同的测量场景，缺失的观测值分别以0、-9、-99或（云量情况下）9进行记录。在转换后的.csv格式文件中，这些标记缺失值的字符已被移除，对应位置留空。

各观测指标的单位推测如下：
* 太阳辐射：单位推测为兆焦耳每平方米（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：单位为八分仪（oktas，即云量占天空总份数的八分之一）
* 风程：单位为公里
* 水汽压：单位推测为帕斯卡（Pa）