Field Notes
<--2001-05-23 15:45:00 | 2001-05-31 09:00:00-->Other sites visited today: Vaira
Tonzi: 2001-05-24 04:00:00 (DOY 144)
Author: Nancy Kiang
Others: Nina Kilham
Summary: Predawn and midday water potential,
| WHO: Nancy Kiang, Nina Kilham (technician in Tracy Benning's lab) WHERE: Tonzi Ranch WHEN: camped overnight, Wed-Thurs, 5/23-24/01 WEATHER: Wed 93°F, Thurs 88°F , grasses all brown, with interspersed wheatgrass(?) still green. WHAT: Measure pre-dawn and midday leaf water potentials and Leaf Area Index of transects. 5/24/01. -4:00 am DST (3:00 Std Time). Started pre-dawn water potentials. -Took 2 leaves of each sapflow tree for pre-dawn leaf water potential -Set P consistently -6 bar. Pine needles only -15 bar. -Set Q more variable, -4 to -8 bar. -Pressure bomb tank ending pressure at 500 PSI. -Measured LAI of transect T3 before dawn. -Sunrise ~ 6:10 am DST (5:10 am Standard Time) *Dataloggers of the LAI-2000's are on Standard Time. -15:00 DST measured midday leaf water potential. -Pressure bomb tank was unable to force lower than -22 bar. -Replaced pressure bomb tank with the spare tank at 800 PSI. -Midday leaf water potentials ranged -21 to -32 bar. -Pine tree extruded a lot of sap at first (around -5 bar) then water at -15 bar, same as the morning. -Recorded dendrometer band values. Notes: Next time re-fill both pressure bomb tank and spare tank in the lab to bring pressures of both to at least 1500 PSI. |
Field Data
No tank data
No TZ Well data found
No TZ Moisture Point data found
No VR Moisture Point data found
No TZ grass heigth found
No VR grass heigth found
Tree DBH
| Date | Tag# | Reading (mm) |
|---|
Water Potential - mode: raw
| Time< h> | Species | Tree | readings (bar) | ||
|---|---|---|---|---|---|
| 2001-05-24 06:00:00 | OAK | SETP | -7.9 | 0.53 | 8 |
| 2001-05-24 06:00:00 | OAK | SETQ | -11.3 | 0.71 | 6 |
| 2001-05-24 06:00:00 | PINE | 78 | -12.5 | 0.71 | 3 |
| 2001-05-24 12:00:00 | OAK | SETP | -27.8 | 2.12 | 8 |
| 2001-05-24 12:00:00 | OAK | SETQ | -27.4 | 0.57 | 6 |
| 2001-05-24 12:00:00 | PINE | 78 | -15.0 | ||
| OAK_SETP | Whole Study | 20010524 | 06:00:00 | twig/leaf cluster | -0.79 | 0.53 | 8 | |
| OAK_SETP | Whole Study | 20010524 | 12:00:00 | twig/leaf cluster | 2.4 | 5.4 | 3 | |
| OAK_SETQ | Whole Study | 20010524 | 06:00:00 | twig/leaf cluster | -1.13 | 0.71 | 6 | |
| OAK_SETQ | Whole Study | 20010524 | 12:00:00 | twig/leaf cluster | 1.3 | 4.41 | 3 | |
| PINE_78 | Whole Study | 20010524 | 06:00:00 | twig/leaf cluster | -1.25 | 0.71 | 3 | |
| PINE_78 | Whole Study | 20010524 | 12:00:00 | twig/leaf cluster | -1.5 | 1 |
No TZ Grass Biomass data found
No TZ OakLeaves Biomass data found
No TZ PineNeedles Biomass data found
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.
Tonzi Z-cam data