Field Notes

<--2002-09-18 15:06:00 | 2002-10-02 05:30:00-->

Tonzi/Vaira: 2002-09-20 09:30:00 (DOY 263)
Author: LiuKang Xu
Others:

Summary: swapped 7500 on all towers, ACi curves, samples for O18 analysis, 6400 chamber TC broke

When: Sept 20, 2002 D263 Fri.
Where: Tonzi/Vaira Ranches
Who: Liukang Xu & Jianwu Tang
Weather Sunny, temperature lower 100s

Trip Purpose: check 3 flux systems and download data, replaced all the li-cor 7500, soil moisture probe reading, dendrometer reading, A/Ci curve for oak leaf at Tonzi Ranch. Soil respiration measurement. Took 12 twig samples from 6 trees for O18 analysis. The percentage of senescence brown leaf on this 6 trees ranges from more than 90% to close 0%. The O18 data should tell us which layer of water that those trees are tapping.

Overall: All the flux systems were running great. All the data logger communicated well with laptop. Jianwu’s soil CO2 sensors OK.

Tonzi Ranch: arrived at 9:30 am. Clear sky,

Tower system: fence OK. replaced licor 7500 sn 0035 came off and sn 0041 went on. PV reading 13.8, 7.7 and 1.9 at 13:44. After replace the licor, reboot PC, w, u, v, Tsonic, q and CO2 outputs on scale.

Floor system: flux systen running good. fence OK. PV reading 13.6, 10.1 and 2.2 around 14:25. Replace licor 7500 sn 0073 came off and sn 0065 went on.

Vaira ranch: flux system running good. Fence OK. PV reading 13.4, 15.0 and 2.4. at 11:00. No communication with datalogger CR23_6 ( Dr. Snyder’s surface renewal) with laptop. Check his thermocouples, seems OK, unplugged all coax connectors and re-plugged them, still no communications. Replaced licor 7500 sn 0418 came off and sn 0042 went on.

Soil moisture reading.

Tonzi Vaira
7931AF 402165 574B4B 402FF3 57632 573FAA 7933FDE
9/20/2002 canopy canopy open drip line open open open
Xu tower understory solar panel sap flow resp trans solar panel flux tower
0 to 15 cm 5.80 3.40 6.53 1.17 4.37 1.33 1.60
15 to 30 cm 12.03 11.50 10.70 10.70 10.70 5.10 9.23
30 to 45 cm 15.53 12.10 14.80 12.20 4.17 10.57 14.00
45 to 60 cm 14.33 6.30 20.03 11.30 8.60 17.83 19.77

Dendrometer reading

d263
date 9/20/2002
jday
time_pst 11:25
treetag
tree71 6.4
tree72 8
tree77 11.3
tree78 20.1
tree79 7.8
tree245 4
tree248 5.8
tree250 7
tree252 11.4
tree255 6.3

Notes: The thermocouple in the leaf chamber of licor-6400 was broken. I need order another one.

0 photos found

Graphs display:
16 sets found

No data found for TZ_Fenergy.
11 TZ_tmet graphs found

Explore the graph:Tonzi Tower Met: Temperature and Power in a new window

Explore the graph:Tonzi Tower Met: Solar Radiation in a new window

Explore the graph:Tonzi Tower Met: IRT Sensors in a new window

Explore the graph:LED Sensor Incoming in a new window

Explore the graph:LED Sensor Outgoing in a new window

Explore the graph:4-Band Solar Radiation in a new window

Explore the graph:Air Temperature Profile in a new window

Explore the graph:Relativity Humidity Profile in a new window

Explore the graph:Tonzi Tower PRI in a new window

Explore the graph:SRS PRI/NDVI in a new window

Explore the graph:SRS NDVI in a new window

No data found for TZ_soilco2.
Can't check TZ_mixed
3 TZ_mixed graphs found

Explore the graph:Tonzi PPT in a new window

Explore the graph:Tonzi CO2 and H2O Densities in a new window

Explore the graph:Air Pressure in a new window

No data found for TZ_fflux.
8 TZ_fmet graphs found

Explore the graph:Soil Heat Flux in a new window

Explore the graph:Tonzi Soil Temperature Set A in a new window

Explore the graph:Tonzi Soil Temperatures Set B in a new window

Explore the graph:Tonzi Soil Temperatures Set C in a new window

Explore the graph:Tonzi Soil Temperature Set D in a new window

Explore the graph:Well Level in a new window

Explore the graph:Well Water Temperature in a new window

Explore the graph:Soil Water Potential in a new window

No data found for TZ_tram.
No data found for TZ_co2prof.
No data found for TZ_irt.
No data found for TZ_windprof.
No data found for TZ_tflux.
2 TZ_sm graphs found

Explore the graph:Floor Solar Radiations in a new window

Explore the graph:TZ Soil Moisture in a new window

Can't check TZ_met
1 TZ_met graphs found

Explore the graph:Floor and Tower RH in a new window

Can't check TZVR_mixed
No data found for TZ_osu.
No data found for TZ_fd.