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. 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.
Dendrometer reading
Notes: The thermocouple in the leaf chamber of licor-6400 was broken. I need order another one. |
0 photos found
16 sets found
No data found for TZ_Fenergy.
11 TZ_tmet graphs found
No data found for TZ_soilco2.
Can't check TZ_mixed
3 TZ_mixed graphs found
No data found for TZ_fflux.
8 TZ_fmet graphs found
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
Can't check TZ_met
1 TZ_met graphs found
Can't check TZVR_mixed
No data found for TZ_osu.
No data found for TZ_fd.