Field Notes

Mayberry: 2017-03-29 14:20:00 (DOY 88)
Author: Daphne Szutu
Others: Elke Eichelmann, Kyle Hemes

Summary: Data collection cleaning, installed fluorometer, reinstalled thermocouples set 17-19 and set 20-22, measured water level

2017-03-29
Mayberry

We arrived at 14:20. It was sunny and clear with some high cirrus clouds. It was windy. The water level was a bit lower than last week. Elke was in the water and measured water depth halfway across the channel; the deepest spot was 1.10 meters.

Elke re-installed two sets of thermocouples. z = 0 at the soil surface (where the measuring tape hits resistance in the water).

Thermocouples 17, 18, 19 are on one rod, about 3 m SE of the tower, in the tule. This is where the rod was removed from last week.
-Thermocouple 17: z = 2 cm
-Thermocouple 18: z = -2 cm
-Thermocouple 19: z = -4 cm

Thermocouples 20, 21, 22 are on one rod, about 3 m NW of the tower in the tules. The thermocouple rod was originally 4 m from the tower, but the wire for thermocouple 22 was too short to reach. This wire has a lot of tension in it.
-Themocouple 20: z = -8 cm
-Thermocouple 21: z = -16 cm
-Thermocouple 22: z = -32 cm

After installation, thermocouples 17-22 had reasonable numbers, about 15 deg C. Thermocouples 23-25 (which I had re-installed last week) were reading about 45 deg C. After I switched the order of copper and constantan in the H and L ports, thermocouples 23-25 had reasonable numbers around 15 deg C.

I collected met, USB GHG, and camera data.

I sent a new CR1000 program, MB_Tule_20170323.CR1. This new program has instructions for reading the fluorometer and stores the fluorometer data at the end of the data table.

We hung up the fluorometer (sn 2300565) on the water sensor boom so that the fluorometer sensors are about the the same depth as the top water sensors (the minidot DO and Eosense CO2 sensors). The fluorometer is wired to the CR1000 RS-232 port. We'll connect the laptop to the datalogger through the CR1000 CS I/0 port with the CS I/O cable (not the RS-232 serial cable).

Kyle cleaned the radiation and EC sensors.

LI7500 readings:
CO2 407.4 umol/mol
H2O 412.1 mmol/m3
T 22.7 Celsius
P 101.9 kPa
SS 101.5 -> 102.9 after cleaning

LI7700 readings:
CH4: 1.91
RSSI: 49.6 -> 80.0 after cleaning

Kyle and Elke installed conduit around the EC wires between the wash reservoir box and the EC sensors. The wash reservoir was mostly full. The precip bucket funnel was clear.

We left at 15:55.

0 photos found

11 sets found

7 MB_flux graphs found