Field Notes

<--2017-11-10 15:45:00 | 2017-11-18 12:00:00-->
Other sites visited today: Mayberry | Bouldin Corn | East End | Twitchell Alfalfa

Sherman Wetland: 2017-11-17 09:30:00 (DOY 321)
Author: Daphne Szutu
Others: Joe

Summary: Reset LI-7550 clock, started up Patty's LGR, downloaded flux and met data

2017-11-17
Sherman Wetland

We arrived ~9:30. It was sunny, clear, and breezy. The reeds still look green.

There was about 50 ml of water stuck in the rain bucket funnel. I dumped out the water and cleared the funnel. From the data, it looks the water was slowly dripping into the tipping buckets yesterday, 2017-11-16.

I started up the LGR. Calibration gas was at 250 psi.
LGR readings:
[CO2]=421ppm
D13C=-6per mil
D18O=90per mil
[H2O] 495ppm
Gas temp=16.8C
P=199.9 Torr
Laser response=12.86 us
Rate=1s
MIU=v:1 tower

We downloaded GHG and met data. There were files on the camera card but we didn't download it. There were fine spiderwebs around the flux sensors. The wash reservoir was empty; we refilled it.

The 7550 time was exactly 8 hours behind PST. We tried to reset the 7550 clock, but the time kept reverting. The 7700 clock was set on automatic mode, so the 7700 was resetting the 7550 clock. After changing the 7700 clock to slave mode, Joe reset the 7550 from 01:34 to 09:34 and started logging data on the 7550.

The 7700 was showing clock sync error even after resetting the 7550, but the times looked synched, to the second.

LI-7500 readings:
CO2 415 ppm
H2O 476.6 mmol/m3
T 14.0 C
P 102.3 kPa
SS 107

LI7700 readings:
CH4 1.95 ppm
RSSI 46.0 --> 71.0 after cleaning

We left at 10:10.

0 photos found

7 sets found

Can't check MBWPEESWGT_mixed
Can't check MBEEWPSWEPGT_cam
15 SW_met graphs found