The Iowa Environmental Mesonet (IEM) collects environmental data from cooperating members with observing networks. The data are stored and made available on this website.

IEM Daily Feature

Eclipse Solar Radiation

Posted: 20 Apr 2024 08:03 AM, Views: 967
Tags:   eclipse  
For the 8 April eclipse, the ISU Soil Moisture Network put its southeastern most station (near West Point, IA) into a rapid scan mode to observe atmospheric variables at a 15 second interval. This station subsequently suffered a communications outage and did not come back online until yesterday! So with this data in hand now, a daily featured chart should at least be made. The chart focuses in on the eclipse period and attempts to address the question if the percentage of the sun covered by the moon is linear to the decrease in received solar radiation. The black line shows the 15 second observations, the red lines denote the period of the eclipse, the green line is an estimate of received radiation if the sky was clear and there was not an eclipse, the blue line is the eclipse coverage percentage, and the black dashed line represents the linear model. So while the relationship looks good and intuitive, it is not exact as the impact of received radiation is very nuanced with lots of small effects causing small variances in this linear model. If you want details on the minutia involved, ask Google Scholar.
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Previous Years' Features
Cantril Hwy 2 WB, IA Webcam:
News Items  

16 April NWS Data Outage [resolved]
Posted: 16 Apr 8:53 AM

15 April NWS Website Outage
Posted: 15 Apr 9:54 PM

15 April GOES Outage [resolved]
Posted: 15 Apr 10:52 AM

3 April NWS Data Outage
Posted: 3 Apr 1:08 PM

2 April NWS Data Outage
Posted: 2 Apr 8:40 AM

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