Blue Hill Meteorological Observatory Climate Data

| January 25, 2015 | Reply

Extensive work is in progress to transfer over 130 years of primary daily data observations including maximum and minimum temperature, precipitation, snowfall, snow cover, wind speed, sunshine and other parameters.  This process will fill gaps and remove inconsistencies in the existing data base and begin the process of digitizing data that has never been tabulated before. The objective is to generate the best possible collection of BHO daily climate data to support ongoing and future climate research projects. Below is a sample of quality-controlled daily data recorded at Blue Hill that is currently available on-line. As additional data sets are processed, they will be made available to Observatory members or researchers on request.


bho_sun_recBright Sunshine Duration

A Campbell-Stokes sunshine recorder (pictured) has been in use to measure bright sunshine duration at BHO since 1886, and this represents the longest such record of sunshine in North America. The parameter is referred to as bright sunshine since sunlight must be of sufficient intensity to scorch a paper card placed under the glass sphere to record the daily duration of sunshine.   The recently tabulated daily sunshine data have been studied to assess the presence of climate change signals, and a paper based on this work has been published in the Bulletin of the American Meteorological Society.

A sample of the daily sunshine data for the 1981-2010 30-year period is provided here in the form of an Excel spreadsheet, which contains for each month of the year the recorded sunshine hours, minutes and percent of possible for each day.





Category: Graphs & Data

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