Field Notes

Hill Slough: 2023-03-02 09:40:00 (DOY 61)
Author: Daphne Szutu
Others: Kyle

Summary: Regular data collection/cleaning, calm day for once

2023-03-02
Hill Slough

Kyle and I arrived at 9:40 PST. It was cool but mostly sunny with not much of a breeze, so it didn’t feel too cold. We had about 5cm of rain last week, with more rain expected late next week.

It was near high tide and the staff gauge read 5.45ft at 9:53 PST. Some of the dead vegetation between the road and the boardwalk has disappeared—blown away in the wind to become tumbleweeds? There were quite a few birds on the water around the tower.

I downloaded met, cam, and USB GHG data. Kyle cleaned flux and rad sensors. The wash reservoir was ¾ full; we refilled it. I collected a porewater samples from the zipper under the tower. I will store it in the fridge until we can measure it for conductivity.

The 7500 read: 430ppm CO2, 280mmol/m3 H2O, 12.9C, 102.3kPa, 101SS
The 7700 read: 2.4ppm CH4, 56RSSI – 70RSSI after cleaning

We stopped at the channel on the way out to collect the miniDOT data. There were quite a few mysid (“shrimp”) hidden in the holds of the pantyhouse. I swapped the miniDOT desiccant.

I also pulled up the CTD and eosGP (dissolved CO2 sensor) to show to Kyle. There were 2 barnacles growing on the CTD (where it was not covered in copper tape), and the CTD orifice was full of mysid. I shook some of them out, but then decided the mysid would re-colonize it the orifices as soon as I put it back in the water, so just plunked both sensors back in the water. I’m not sure how much the mysid impact the measurements.

We left at 10:10 PST.

0 photos found

4 sets found

20 HS_met graphs found