Field Notes

<--2020-04-24 12:00:00 | 2020-05-21 12:30:00-->
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Sherman Wetland: 2020-05-03 11:30:00 (DOY 124)
Author: Patty Oikawa
Others:

Summary: Swapped cal gas tanks, calibrated LGR with NOAA standard, downloaded data

Patty Arrived at 11:20am, light breeze, sunny and warm, clear skies

Lots of ants in the box
Replaced lowest and top filter, blew out spider webs, middle filter was fine
**running low on filters, order some asap
CO2=425.9ppm
D13C=-16.75per mil
D18O=-98.4per mill
H2O=359.2ppm
Gas temp=44.58C
P=119.77torr
Laser response=12.85us

Tried starting calibration with old tank but it was empty. The gauge said that it had 30psi on the first stage and 0psi on the second, I think the tank is just empty but the reg is off.
I noticed during this also that the laser adjust was off so I changed that before connecting the other tanks:
LAser adjustment:
Orig: 2.015
New: 2.020
Looks good now

Then I connected the NOAA tank using the other regulator I brought w/ me from the lab (values looked good: CO2=408.2ppm D13C=-15.65per mil)
I think Iâ€™ll bring the broken reg home and order a new CGA 590 to bring out with me next time.
Then connected new cal cylinder. 1st gauge:1900psi, 2nd =26psi, looks like a fine tank (CO2 420.19ppm with D13C -44.4per mil). Recorded values, downloaded data and left.

0 photos found

7 sets found

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