| Description | Noctilucent cloud observation reports from a variety of places including the United Kingdom and Eire, North America, the Falkland Islands, Sweden, Denmark, Germany, Belgium, Greenland and the Atlantic.
The reports, which span the noctilucent cloud season from May to August, are made from land observers, meteorological offices and aircraft.
The data appears in various forms. Handwritten or typewritten letters describing observations are often accompanied by sketches of noctilucent clouds. There are also worksheets sent from Edinburgh University to meteorological offices in the United Kingdom which provide columns for details such as a description of the noctilucent clouds, information on how much sky was covered by cloud (oktas) and whether the sky condtions were problematic (too hazy, foggy or light, for instance). Black and white photographs accompany some of the reports.
Annual graphs are present for most years. These plot when observations of noctilucent cloud in the United Kingdom were made. The 'x' axis on these graphs lists the months 'May', 'June', 'July', and 'August', and the 'y' axis lists the places in the United Kingdom from where the observations were made. Annual log books produced by the University of Edinburgh summarising received observations can also be found in the files. |