SGP/EBBR/E26 - Net Radiometer Hemisphere Changes

The upper hemisphere of the net radiometer at the site was punctured
allowing water to collect in the lower (and sometimes upper) section of the sensor. The 
punctures are most likely the result of migratory birds (a problem that we have experienced 
almost every year here at ANL also). The punctures (and water in some net radiometers) 
did not result in obvious invalidation of the data.

Whether there is water in the lower hemisphere or not, a small puncture of the upper 
hemisphere would not have a major effect on the net radiation measurement.  Significant 
amounts of water in the lower
hemisphere should have a major effect on nighttime measurements particularly, although 
that effect is hard to detect in the data. 
The date when the puncture occurred is approximate - but is certainly 
no more than two weeks before the hemisphere was replaced.

• Net radiation(net_radiation)

• Net radiation (mV)(net_radiation_mv)

• Surface sensible heat flux(sensible_heat_flux)
• Surface latent heat flux(latent_heat_flux)
• Net radiation(net_radiation)