Located in the lower foothills of the Sierra Nevada Mountains, the Tonzi Ranch site is classified as an oak savanna woodland on privately owned land. Managed by local rancher, Russell Tonzi, brush has been periodically removed for cattle grazing. The overstory is dominated by blue oak trees (40% of total vegetation) with intermittent grey pine trees (3 trees/ha). Understory species include a variety of grasses and herbs, including purple false brome, smooth cat's ear, and rose clover. These two distinctive layers operate in and out from one another. Growing season of the understory is confined to the wet season only, typically from October to early May. In contrast, the deciduous blue oak trees are dormant during the rainy winter months and reach maximum LAI in April. The blue oak ecosystem rings the Great Central Valley of California, inhabiting the lower reaches of the Sierra Nevada foothills.
Partially installed new GMP343 co2 profile on the tower, removed the FD chamber for Tree 1 soil co2 profile.
Equipment installed at the site:more details
Apogee Infrared Temperature SI-121
Campbell Sci. Multiplexer AM16/32A
Campbell Sci. Multiplexer AM25T
Campbell Sci. Data Logger CR1000
Campbell Sci. Data Logger CR10X
Campbell Sci. Data Logger CR200
Campbell Sci. Data Logger CR23X
Campbell Sci. Interface NL115
Decagon Narrow Band SRS-Ni NDVI
Decagon Narrow Band SRS-Nr NDVI
Delta-T Diffuse Radiation BF5
Delta-T Soil Moisture Probe ML2x
Environmental Sensors Inc. Moisture Point PRB-K Type #8
Environmental Sensors Inc. Soil Moisture Probe PRB-K Type #8
Fabricated Battery Bank BB-Fab
Gill Interface 1189PC
Gill Anemometer WM 1590
Global Water Water Level WL16U
Handar Anemometer 425A
Hukseflux Heat Flux Plate HFP01
Hukseflux Heat Flux Plate HFP01SC
Kipp & Zonen Net Radiometer CNR1
Kipp & Zonen Net Radiometer NR-LITE
Kipp & Zonen PAR Sensor PAR-LITE
Licor Gas Analyzer LI-7500A
Licor Interface LI-7550
StarDot Camera NULL
Vaisala CO2 probe GMM222
Vaisala CO2 probe GMP221
Vaisala CO2 probe GMP222
Vaisala CO2 probe GMP343
Vaisala CO2 probe GMT221
Vaisala RH & Temp HMP45AC
Vaisala RH & Temp HMP60
Vaisala Barometer PTB101B
Met data from instruments at the top of the tower.
Supplementary radiation and heat sensors on the ground in the open and under the trees installed in early summer of 2010
Southest sap flow station on CR10x13 for cluster 5 and 6 trees and prgram C56
Soil CO2 profiles at -2, -4, -8, -16cm from soil surface in two locations one in the open the other near the base of a tree. Soil temperatures at the measument locations are also recorded.
Soil moisture from CR23X3 - seven Delta-T Theta Probes near the tower.
Data from the 30 minute .flx files recorded by winflux for the above canpoy tower at Tonzi.
Soil temperature, soil heat flux, airT, RH and P from the area near to the gate in the tower cow fence
30 minute flux data from the Floor tower at Tonzi from the winflux flx files.
Data from the Moisture Point probes at Tonzi.
Data generated from JPEG images of the upward facing zenith cameras Tonzi
One second PAR and net radiation from a moving tram car
Profile of CO2 concentration are four points on the tower
Wind profile data from Handar 2D sonics on the Tower at heights 1 = 10.61m, 2 = 11.76m, 3 = 13.21m, 4 = 15.04m and 5 = 16.86m
Automatic calibrations of the tower co2 profile
This material is based upon work supported by the National Science Foundation and US Department of Energy. Any opinions, findings, conclusions, or recommendations expressed in the material are those of the author(s) and do not necessarily reflect the views of the supporters.