Field Notes
<--2024-12-04 13:50:00 | 2025-01-02 10:00:00-->Other sites visited today: Rush Ranch
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Hill Slough: 2024-12-18 09:15:00 (DOY 353)
Author: Joe Verfaillie
Others: Brandon
Summary: Channel box latch missing, changed 7700 heater settings - no power! tightened wires on AM25T, Met Ducks/Aaron talked about water sensor location
Hill Slough 2024-12-18 I arrived at about 9:15 PST. It was cold with fog lifting to low overcast. All the surfaces were very wet. Tide was low but there was flotsam much higher up the berm to the road than usual from recent king tides. At the beginning of the boardwalk, the south wing of the security fence was folded back (east) next to the boardwalk. I pushed it back to be perpendicular to the boardwalk. Brandon from Patty's lab joined me later as we were headed to Rush Ranch next. The giant powerline towers south of the site have been removed. Prettier sunset photos! The range finder at the channel was pushed to the east at about a 20deg angle. I straightened it to point down again. Maybe high tides and wind from the west causing waves to push it? I was planning to fix the bottom hasp on the data logger box at the channel, but the hasp was nowhere to be found. Daphne said they had it in hand but wasn't sure where it went. At the tower I topped of the wash reservoir that was about a quarter low. After figuring out which port on the laptop worked I collected the met and flux data. The 7500 read: 439.9ppm CO2, 463.5mmol/m3 H2O, 10.2C, 103.1kPa, 99.8SS - 101.1 after cleaning The 7700 read: 2.11ppm CH4, 37.2RSSI - 79.5 after cleaning I collected the Picam images. We have noticed that the 7700 RSSI has looked a little rough and maybe raising the heater power might help. This site is wetter and windier than the other sites and the low heater power we usually use might not be able to keep up. I raised the heater power from 5 to 20% for both mirrors and extended the heated period by two hours on each end from 18:00 - 8:00 to 16:00 to 10:00. I did not bring the scratchy on a pole with me and the staff gauge was dirty but after careful examination of a photo I think the water level was 4.19ft at 09:17 PST. There was about 10cm of water when I arrived and none when I left. I pulled two samples from the sipper and measured the surface salinity. Porewater, 8.01mS, 11.3C Porewater, 8.27mS, 10.5C Surface, 3812uS, 9.6C Kyle noticed that some of the thermocouple data had some bad spots. My guess was a loose wire between the data logger and the multiplexer. I tightened all the screws on the data logger and the connections from the data logger on the AM25T. All screws snugged down a little and one on the AM25T turn maybe about half a turn. I checked a few screws on individual TCs and they seemed tight. AS we were leaving, Aaron Will and two others from Ducks showed up. We looked at the filled in channel and talked about where to relocate the water sensors. Aaron is up for anything and might be able to kick in some money for security if needed. On the way to Rush I stopped at the power line berm and looked around a bit. I didn't see any spot I was excited about. I left at about 9:45 PT |
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4 sets found
21 HS_met graphs found
4 HS_flux graphs found
1 HS_cam graphs found
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2 HS_Processed graphs found