Field Notes

<--2016-04-01 10:00:00 | 2016-04-28 09:25:00-->
Other sites visited today: Twitchell Alfalfa | West Pond | East End | Twitchell Rice
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Mayberry: 2016-04-13 09:05:00 (DOY 104)
Author: Elke Eichelmann
Others: Joe Verfaillie

Summary: Calibrated LI7700, swapped LI7500, conductivity sensor not working

Arrived at 9:05. Sunny, clear, breezy with gusts. Tules and cattails are quite tall now, there is lots of thick grass on the berms, really need a truck to drive out here.

LI7500 readings (all H2O readings were taken in mmol/mol at this site today):
CO2 410.73
H2O 12.43
T 15.64
P 102.08
SS 96.253
SOS 341.797

LI7700 readings after cleaning (did not take a reading before cleaning today):
CH4: 1.911
RSSI: 78.29

Collected USB GHG data, camera pictures, and Met data. HMP pressure reading looks fine, reads
102kPa, in line with the reading from the LI7550 pressure sensor.
Ts_16 reading INF; CondTemp and TempCondA also reading INF, Conductivity reading also weird. Conductivity probe does not seem to be working correctly, removed probe sn 6097 and interface sn 3270 and brought back to the lab for testing.

Updated LI7550 sn AIU-1285 box firmware from v7.3.0 to v8.0.0
Refilled LI7700 wash water reservoir.

Calibrated LI7700 sn TG1-0357. Calibration tube fell in the water before we got started, was recovered, but dripping wet. Dried the tube as best as we could. Should not affect the CH4 calibration.
Calibration was done using zero air and the Ameriflux AMPCO2CH4-calibration gas at 1.9966ppm
After calibration LI7700 read:
CH4: 1.933
RSSI: 77.65

Swapped the LI7500 head, took down sn 75H-2150 for calibration in the lab, replaced with sn 75H-2182.
LI7500 readings (all H2O readings were taken in mmol/mol at this site today):
old (sn 2150) new (sn 2182)
CO2 420.21 411.72
H2O 11.51 11.03
T 16.65 17.03
P 102.08 102.23
SS 88.91 85.835
SOS 342.146 342.405

We left again at approximately 9:45

0 photos found

11 sets found

7 MB_flux graphs found