Here's an info-graphic analysis of my eclipse observations from 20th March 2015.
Our home weather station (weather.tamaris.org.uk) was busy logging data whilst I was taking pictures & enjoying the view. Of particular interest are the solar energy readings measured in Watts per square meter and the temperature in degrees Centigrade.
As expected the Solar Energy readings (graphed in blue) show a marked dip during the eclipse. Meanwhile the warming of the morning air (graphed in red) seems to plateau during the peak 20-30 minutes of the eclipse.
A few notes should be made about the observations:
- the sky was almost perfectly clear until 11am so the data is clear of cloud interference
- wind conditions were also almost perfectly still
- the sun did not clear our mountain horizon until just after 9am (as seen in the first inset photograph). I believe this would have a small effect, but it would be to reduce the magnitude of the initial drop in readings.
The 3 inset photographs show the progression of the eclipse as the moon apparently moves across the face of the sun, from right to left. The earliest photograph (left-hand one) has a spruce tree silhouette on its lower section due to the sun only just clearing our mountain horizon.