Field Notes

Mayberry: 2016-06-24 10:20:00 (DOY 176)
Author: Joe Verfaillie
Others: Dennis

Summary: Vegetation still brown, water very green, water level high, swapped batteries in minidots, swapped water level pressure sensor

Mayberry
2016-06-24

I arrived about 10:20 with Dennis. It was clear, sunny and warm with a strong breeze from the northwest. The vegetation still looks brown to me but Dennis thought it was greener than last time. The water is very green. Dennis said the visibility is only about 6.5cm deep.

Dennis went into the water to retrieve the water sensors. The top MiniDot DO probeâ€™s batteries were completely dead. The other batteries seemed okay but I swapped them all. Last time they were changed was in August of last year. I also changed the desiccants. I did not bring the audio jack serial cable, but next time we should so that we can check the clocks.

The 7500 read: 403.14ppm CO2, 670.1mmol/m3 H2O, 22.20C, 101.7kPa, 83.7SS
The 7700 read: 1.96ppm CH4, 54.5 RSSI â€“ 74.7 after cleaning
Dennis refilled the wash reservoir. There were lots of spider webs on the eddy sensors and the spars were very dusty, especially on the 7500.

We removed water pressure sensor sn 20010046 and swapped in sn 70011229. The old one had been reporting jumps in readings and seemed to be reading low. It was reading 0.5psi and was about 50cm below the top of the pipe. The new one went in 83cm below the top of the pipe and was reading 0.72psi. The top of the pipe was 30cm above the water. The fence post where the water sensors are mounted was almost under water, so the water level is a little higher than normal.

Dennis cleaned the radiometers and said the tule one was covered in bird droppings.

2 photos found

20160624MB_Dennis1_tn.jpg ( 2016-06-24 10:51:24 ) Full size: 1920x1440
Dennis servicing the water sensor in the Mayberry channel