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.
Fixed Tower power, powered new FLIR cal panel, fixed Floor well, fixed/replaced HMP45 fans.
Equipment installed at the site:more details
Apogee Infrared Temperature SI-121
Apogee Infrared Temperature SI-131
Campbell Sci. Multiplexer AM16/32A
Campbell Sci. Multiplexer AM16/32B
Campbell Sci. Multiplexer AM25T
Campbell Sci. Interface CE4
Campbell Sci. Data Logger CR1000
Campbell Sci. Data Logger CR200
Campbell Sci. Data Logger CR23X
Campbell Sci. Data Logger CR3000
Campbell Sci. Data Logger CR6
Campbell Sci. Interface NL115
Campbell Sci. Radio RF401
Campbell Sci. Soil Water Potential SX229
Decagon-METER Water Level CTD-10
Decagon-METER Narrow Band SRS-Ni NDVI
Decagon-METER Narrow Band SRS-Nr NDVI
Decagon-METER Narrow Band SRS-Pi PRI
Decagon-METER Soil Moisture Probe STD-5TE
Decagon-METER Soil Moisture Probe STD-5TM
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 Anemometer WM 1590
Global Water Water Level WL16U
Handar Anemometer 425A
Hukseflux Heat Flux Plate HFP01
Hukseflux Heat Flux Plate HFP01SC
Hukseflux Net Radiometer NR01
Kipp & Zonen Net Radiometer CNR1
Kipp & Zonen PAR Sensor PAR-LITE
Licor Gas Analyzer LI-7500A
Licor Interface LI-7550
Omega Infrared Temperature OS136-1-MVC
Sierra Wireless Radio Raven XT
StarDot Camera NULL
Texas Electronics Precipitation TE525
Texas Electronics Precipitation TR-525I-R1
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 at four points on the tower. Originally from an LI-800 or LI-820 with samples pumped through solenoid controlled manifold. Starting 2018-02-07 a new system with independent Vaisala GMP343 CO2 sensors were installed at each location.
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
Micromet data from the East End Open Water Tower site (temporary tower for Summer 2017) recorded by a CR6 as 30min averages of 10sec samples. Originally on the levee at 38.109522, -121.636071, but moved about 60m south to the location below after the first month.
Data from the Global Water data logger in the Tonzi Floor well. GL data is instantaneous at arbitrary 30min intervals - these times are rounded to closest half hour when stored. Changed to Decagon CTD-10 well sensor on 2018-02-07
Surface temperatures from IRT sensors
Water level data from the eastern most well near the road.
Oregon State Univ sensors at location SP1 near the soil co2 profiles. These sensors were installed in 2012 for the AirMOSS experiment and given to the Biometlab in summer 2018
Oregon State Univ sensors at location SP2 near the Tonzi Tower. These sensors were installed in 2012 for the AirMOSS experiment and given to the Biometlab in summer 2018
Oregon State Univ sensors at location SP3 to the southeast of the Tower. These sensors were installed in 2012 for the AirMOSS experiment and given to the Biometlab in summer 2018
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.