Field Notes

<--2017-08-23 14:15:00 | 2017-09-08 00:00:00-->
Other sites visited today: Mayberry | West Pond | East End
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Sherman Wetland: 2017-08-30 13:45:00 (DOY 242)
Author: Daphne Szutu
Others: Sam Chamberlain, Patty Oikawa

Summary: Regular data collection/cleaning, uploaded MB 7550 config, collected cal gas samples and isotope data

2017-08-30
Sherman Wetland

We arrived at 13:45. It was clear, sunny, cool, and windy. The empty laptop cover was blown off of the tower and we had to rescue it from the water near the boardwalk. More tule are coming in south of the tower.

Sam cleaned the EC and radiation sensors. Sam and Patty collected cal gas samples, and Patty downloaded the isotope data.

I collected met, camera, and Licor GHG data.

LI7500 readings:
"AIU-1569_SW_all_20170830.l7x" -> "AIU-1569_SW_all2_20170840.l7x"
CO2 397.6 -> 406.3
H2O 686.7 ->595.6
P 101.0 -> 100.9
T 24.8 -> 25.5
SS 103.8 -> 106.3 after cleaning

LI7700 readings:
CH4: 1.98
RSSI: 41.4 -> 70.7 after cleaning

I saved the complete 7550 configuration: "AIU-1569_SW_all_20170830.l7x". I sent the MB config file: "AIU-1285_20170830.l7x". I checked that the polynomial and pressure coefficients and zero/span were correct. I had to manually re-connect the 7700. I re-set the 7550 and saved the new complete configuration: "AIU-1569_SW_all2_20170840.l7x".

We left at 14:20.

LGR notes:
Night before field visit at 9:38pm I started new program so that ref gas runs every 12hrs and inlets run more often:
120 s ref gas
6600s tower
300s 1.5m inlet
300s 3m inlet
(repeat tower and inlets 6x before returning to ref)

I adjusted the laser voltage slightly from 2.040 to 2.043 to better align with the 13C peak. The 18O peak looks more off to me than usual, need to look at the data. Cal gas tank was around 700psi.

LGR:
CO2 413.49 ppm
D13C -11.5 per mil
D18O -5.37 per mil
H2O 399.4 ppm
laser response 12.87 us
P 119.78 Torr
Temp 44.78C

0 photos found

7 sets found

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