Field Notes

Mayberry: 2019-01-18 10:55:00 (DOY 18)
Author: Daphne Szutu
Others: Dennis, Kuno, Camilo, Jiangong

Summary: Regular data downloading/cleaning, swapped 7500 for calibration, CR1000 hung up again, replaced HMP fan wire/screw terminal, left HMP and NDVI sensors disconnected

2019-01-18
Mayberry

Dennis, Kuno, Camilo, Jiangong, and I arrived at 10:55. It was overcast, mild, and calm. The wetland is brown and has been blown down. I forgot to write down the water level, but it looked a bit higher than last time.

Jiangong collected water samples for Isabel at 11:10. Kuno cleaned flux and rad sensors. The HMP fan wasnâ€™t working. The wire between the fan and the screw terminal was corroded; Kuno stripped it back and replaced the screw terminal. Camilo also re-wired the fan wire in the power junction box. The wash reservoir was Â¾ empty; we refilled it.

I couldnâ€™t connect to the datalogger, and didnâ€™t hear the mux clicking, even though the datalogger had power. Camilo and Jiangong observed a puff of smoke coming from some spliced wires when we first got to the tower, from either the HMP AirT/RH or the NDVI sensors. I tried power cycling the datalogger, but that didnâ€™t seem to change anything. I left it unplugged while we repaired the HMP fan. When I plugged it in again, the datalogger started up successfully. Iâ€™m not sure what the issue was, but I left the HMP and NDVI sensors unplugged for now.

After I connected to the datalogger, I collected met, camera, and USB GHG data.

We swapped the LI-7500 for calibration: sn 1594 came down and sn 75H-2514 went up. I uploaded a new configuration file, updated the pressure coefficients, and reset the box. I checked that the 7500 and 7700 were both connected, the USB stick was logging, and that the GHG columns looked good.

LI-7500 readings (sn 1594 --> sn 75H-2514):
CO2 417ppm --> 418
H2O 530ppm --> 466
T 15.3C --> 15.8
P 102.6kPa --> 102
SS 102--> 101 after cleaning --> ??

LI7700 readings:
CH4 2.1ppm
RSSI 49 --> 79 after cleaning

We left at 11:45.

1 photos found

20190118MB_MbSign.jpg ( 2019-01-18 00:00:00 ) Full size: 1920x1440
Entrance to Mayberry with brown tule blowdown in the background.