Field Notes

<--2017-08-23 12:30:00 | 2017-09-13 10:05:00-->
Other sites visited today: Mayberry | Sherman Wetland | West Pond
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East End: 2017-08-30 09:50:00 (DOY 242)
Author: Daphne Szutu
Others: Sam Chamberlain, Patty Oikawa

Summary: Regular data collection/cleaning, SHF plate chewed off at T1, Swapped 7700 ethernet cable at T2, Uploaded new CR1000 program at permanent tower

2017-08-30
East End

It was sunny and warm with a light breeze. Fewer wasps this time overall, probably because we were here in the morning.

Temporary Tower 2 â€“ Closed Canopy

We arrived at 9:50. There was a bloody bird drumstick on top of the 7550 enclosure. Sam cleaned the EC and radiation sensors. The water reservoir was mostly full but we topped it off. There were some sleepy wasps in the datalogger enclosure; Sam swept them out and put in mothballs. Patty cleaned the solar panels.

I downloaded met and flux data and replaced the 7700 ethernet cable. TCE(4) = NAN; AM25T connection was ok, but the wire is probably chewed.

LI7500 readings:
CO2 398.9
H2O 612.4
P 100.6
T 22.2
SS 91.5 -> 93.2 after cleaning

LI7700 readings:
CH4: 2.1
RSSI: 47.3 -> 70.5 after cleaning

We left at 10:10.

Temporary Tower 1 â€“ Open Water

We arrived at 10:15. We couldn't find the path from the road to the met datalogger enclosure at first. The vegetation between the wetland and the road has really grown in. Patty tied on pink flagging tape to mark the path. The water level is about 15cm lower than last time. One of the aquatic plants is more dense than before; it has long stems and feathery leaves.

I downloaded the met and flux data and swapped the met datalogger battery. One of the soil heat flux plates sn 001604 has been chewed off its wire, and Sam recovered the plate.

Sam cleaned the EC sensors and checked the sonic. The sonic seems about level. The N notch of the sonic faces ~east, and the tower is leaning a little, but not as dramatic as at WP. The wash reservoir was full.

LI7500 readings:
CO2 393
H2O 630
P 101.5
T 22.9
SS 104.7 -> 107 after cleaning

LI7700 readings:
CH4: 1.81
RSSI: 56.5 -> 72.1 after cleaning

We left at 10:55.

Permanent Tower

We arrived at 11:00.There were not many wasps buzzing around, but there were many in the wash box. Patty put some mothballs in the wash box.

Sam took 2 water samples for nitrate, sulfate, and phosphorous and 1 methane isotope sample. He also inspected the conductivity probe and cleaned the orifice with the black wire brush.

Patty cleaned the EC and radiation sensors and the rain gauge.

I collected met, camera, and USB GHG data. The conductivity data has been flatlining at 0.002. I checked the wiring of the conductivity probe with the program, and the wiring seemed right. I copied the conductivity instructions from EE_met_20170602.CR1 to EE_met_20170830.CR1 and uploaded the new program, but the conductivity measurements did not change. I also downloaded the minidot and HOBO data. We forgot to put the minidot dessicant back in.

I wasn't able to reconnect to the 7550 or 7700 software again after cleaning to get updated SS and RSSI numbers, but I checked the 7550 LED status lights and the data was logging.

LI7500 readings:
CO2 407.9
H2O 608.4
P 101.0
T 24.9
SS 92.6

LI7700 readings:
CH4: 2.0
RSSI: 46.5

We left at 11:50.

Temporary Tower 3 â€“ Boardwalk

We arrived at 11:50. There were not many wasps in the air here, just a few inside the wash box.

Patty cleaned the solar panels. Sam cleaned the flux sensors: they were pretty dirty and the top of the sonic was covered in blood. Sonic spikes had slipped down into the sonic path. Sam repaired these.

I collected met data and swapped the flux card and confirmed the LED status light on the CR1000 had a heartbeat.

LI7500 readings:
CO2 15.4
H2O 728.5
P 100.9
T 28.9

LI7700 readings:
CH4: 2.1
RSSI: 43.1 -> 71.0 after cleaning

We left at 12:10.

0 photos found

11 sets found

14 EE_met graphs found