Field Notes
<--2012-09-13 11:30:00 | 2012-09-27 12:30:00-->Other sites visited today: Sherman Island | DWR Corn | Mayberry | West Pond
Twitchell Rice: 2012-09-20 11:10:00 (DOY 264)
Author: Cove Sturtevant
Others: Sara, Laurie
Summary: Rice heavily seeding and getting milky, wasp nest gone, changed sonic analog coefficients, Vaisala very close to standard
| Twitchell
2012-09-20 We arrived at approximately 11:10 PDT. Sunny and breezy. The rice is seeding heavily, Sara said they were getting milky. I checked the tower while Sara did LAI, Laurie took clippings from the plots, and both Sara and Laurie did spectral after I was done with the computer (Jaclyn, Dennis, and Jenny had the regular computer). The wasps were surprisingly absent from the very active nest they had built last week in the end of the tower, so I knocked the nest down and smashed it (sorry waspies!). I had trouble connecting with this computer to the 7550 box as well as the 7700. After restarting the computer, resetting the 7550 box, trying to connect directly to the 7700 instrument without the 7550 in between, and doing a lot of playing with the network settings, Sara pointed me to the antivirus software which ended up being the culprit. To note for the future: just disable then re-enable of the antivirus software by right clicking the program in the system tray. It did the trick. Current 7500 readings: CO2 = 388 ppm H2O = 720 mmol m-3 agc = 43.8 t = 28.9 C 7700 readings: CH4 = 1.88 ppm RSSI = 31 (bumped to 67 after cleaning with a hankie and water) MET values looked fine. I changed the coefficients to convert the sonic analog voltages to engineering units in the 7550 box: U & V: m (slope) = 6; b (offset) = 0 W: m = 1; b = 0 SOS: m = 7; b = 335 I plotted the resulting values for a minute or so and the numbers looked good. I checked the tower Vaisala against the temperature standard, keeping the standard shaded until the point at which I replaced the tower Vaisala with it in the radiation shield. It settled very quickly, and was nearly right on: Standard: T = 22 °C; RH =59% Tower probe: T = 22 °C; RH = 60% |
4 photos found
TW_autocam_20120919_1215.jpg ( 2012-09-19 12:15:02 ) Full size: 1920x1440
Bird on tower - been there most days for a week
TW_autocam_20120920_1015.jpg ( 2012-09-20 10:15:02 ) Full size: 1920x1440
Laurie in the field
TW_autocam_20120921_1315.jpg ( 2012-09-21 13:15:02 ) Full size: 1920x1440
Bird on tower - been there most days for a week
TW_autocam_20120921_1815.jpg ( 2012-09-21 18:15:03 ) Full size: 1920x1440
Nice sunet
6 sets found
12 TW_met graphs found
5 TW_flux graphs found
Can't check TWSI_mixed
Can't check SIMBTWEE_met
1 TW_cam graphs found
Can't check TATWBABCSB_cam