Field Notes

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Rush Ranch: 2025-06-10 10:00:00 (DOY 161)
Author: Joe Verfaillie
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Summary: Swapped 7700 for calibration, cow bent the fence a bit - fixed, updated met program with Rev Bowen.

Rush Ranch
2025-06-10

I arrived at the tower about 11:00 after walking out from the Reserve parking lot carrying a 7700, tools and a jug of water. There are yellow star thistle plants (Centaurea solstitialis cumulatively toxic to horses) along the path that have nasty spines. It was clear, sunny and cool with wind from the west. The grasses are golden and the wetland is green and white with pepperweed flowers. The tide was low but the ditch at the edge of the wetland had some water in it. I assume a cow had displaced the one fence panel where we enter the fencing. I straightened it out and found no other damage.

I collected the flux, met and camera data. Then I swapped the 7700 for calibration: sn TG1-0203 came off and sn TG1-0424 went on.
The 7500 read: 413.6ppm CO2, 596.7mmol/m3 H2O, 18.6C, 101.2kPa, 93.2SS - 97.5 after cleaning
0203 dirty read: 2.00ppm CH4, 46.3RSSI - 83.2 after cleaning
0424 fresh read: 2.01ppm CH4, 73.4RSSI
I connected the 7700 in the 7550 interface and restarted the box to see that the changes remained. The wash reservoir was a little low - I topped it off.

I updated the CR1000 met program to include the Rev Bowen stats.

I could not connect to the Annex tower with the radio in the logger box. Not a big deal but it would be nice for that to work - I think I have longer runs at Tonzi that work just fine with the antennas inside boxes. I had to go Annex tower anyway to add mothballs to the box. I measured the well conductivity and the conductivity of the water in the ditch.

Well, 12.63 mS, 18.6C
Ditch, 5.26 mS, 19.9C

I left the site at about 11:40 PDT

1 photos found

20250610RR_CowBentFence.jpg ( 2025-06-10 10:52:38 ) Full size: 1920x1440
Cows bent the fence at the Rush Ranch site