Field Notes

<--2011-08-04 09:30:00 | 2011-08-14 09:59:00-->
Other sites visited today: Mayberry | Sherman Island

Twitchell Rice: 2011-08-12 08:30:00 (DOY 224)
Author: Joe Verfaillie
Others: Jaclyn, Sara

Summary: Swapped internal 2um filter in the LGR, calibrated the LGR, replaced the 40um strainer.

Twitchell
2011-08-12

I arrived about 8:23PST with Jaclyn and Sara. It was sunny and mild with a good breeze from the west. There were some high thin clouds. The rice is taller I think and Jaclyn says she sees a few heads. Jim stopped by and said that the rice was progressing slower than they’d like do to the cool weather.

I added the VGA cable and the small screen on the LGR worked just fine. The initial reading from the LGR were:
8:23PST, 25.32C, 89.28Torr, 16.056usec, 10Hz, 1.898ppm

The LGR pressure was really low 89.28 and in slow flow it was even lower. I checked the external 2um filter and it seemed clean. I checked the internal 2um filter and it was completely stopped up. I replaced it with a cleaned one. I blew the replacement filter clear with the cal tank but it still brought the ring time down after I got it all back together. The pressure was better and I had to close down the bypass valve to bring it in range.
9:00PST, 24.16C, 144.56Torr, 13.300usec, 10Hz, 1.831ppm

The low flow pressure was still a bit low during calibration:
9:06PST, 24.05C, 125.31Torr, 13.302usec, 1Hz, 3.270ppm

The calibration was almost right on with the 3.267ppm tank at 650psi. Last cal was July 1, 2011. The pressure fell to 111.7 by the end of the calibration.

I also replace the 40um filter strainer. It was very dirty and had some spider parts in it.

Before leaving the LGR read:
9:34PST, 24.55C, 144.81Torr, 13.291usec, 10Hz, 1.827ppm

I collected data from the computer, the plantcam and the CR1000.

The net radiometer was very dirty like birds have been sitting on it. Other radiation sensor looked okay.

The DO probe is sn DO-2

The solar panels are very dirty and could use a wash.

11 photos found

Butterfly
20110812TW_Butterfly.jpg ( 2011-08-12 09:34:15 ) Full size: 2560x1920
Butterfly

CR23X data logger for met data
20110812TW_CR23X.jpg ( 2011-08-12 09:23:02 ) Full size: 2560x1920
CR23X data logger for met data

Data logger box
20110812TW_DataLoggerBox.jpg ( 2011-08-12 09:22:48 ) Full size: 2560x1920
Data logger box

Jaclyn and Sara
20110812TW_JaclynSara.jpg ( 2011-08-12 09:35:11 ) Full size: 2560x1920
Jaclyn and Sara

Tower, rice field, Mt Diablo
20110812TW_TowerDiablo.jpg ( 2011-08-12 09:24:21 ) Full size: 2560x1920
Tower, rice field, Mt Diablo

Jaclyn and Sara.
TW_plantcam_20110812_0933.jpg ( 2011-08-12 09:33:00 ) Full size: 2560x1920
Jaclyn and Sara.

Fieldwork.
TW_plantcam_20110812_1203.jpg ( 2011-08-12 12:03:00 ) Full size: 2560x1920
Fieldwork.

UC Davis in the field.
TW_plantcam_20110812_1233.jpg ( 2011-08-12 12:33:00 ) Full size: 2560x1920
UC Davis in the field.

UC Davis in the field.
TW_plantcam_20110812_1503.jpg ( 2011-08-12 15:03:00 ) Full size: 2560x1920
UC Davis in the field.

Nice sunset.
TW_plantcam_20110812_1933.jpg ( 2011-08-12 19:33:00 ) Full size: 2560x1920
Nice sunset.

Morning moon.
TW_plantcam_20110813_0500.jpg ( 2011-08-13 05:00:00 ) Full size: 2560x1920
Morning moon.

Graphs display:
6 sets found

12 TW_met graphs found

Soil Heat Flux

Solar Radiation

Air Temperature

Soil Temperature Set 1

Soil Temperature Set 2

Soil Temperature Set 3

Water Temperature

RH and Pressure

Soil Moisture

Rain and Water Level

Disolved Oxygen

LED NDVI Channels

5 TW_flux graphs found

Sonic Anemometer Winds

LI7700 CH4 and RSSI

Twitchell CH4

LI7500 CO2 and H2O

Twitchel Rice Flux Counts

Can't check TWSI_mixed
Can't check SIMBTWEE_met
1 TW_cam graphs found

TW Rice Autocam

Can't check TATWBABCSB_cam