General Site Information
Site ID:US-Ton
Site Name:Tonzi Ranch
Tower Team: PI: Dennis Baldocchi <> - University of California, Berkeley
FluxContact: Siyan Ma <> - University of California, Berkeley
Technician: Daphne Szutu <> - UC Berkeley
Technician: Joe Verfaillie <> - University of California, Berkeley
Elevation (m):177
NetworkAmeriFlux, Phenocam
IGBP:WSA (Woody Savannas: Lands with herbaceous and other understory systems, and with forest canopy cover between 30-60%. The forest cover height exceeds 2 meters.)
Mean Annual Temperature (degrees C):15.8
Mean Annual Precipitation (mm):559
Data Products: FLUXNET2015 Dataset
FLUXNET LaThuile Dataset
Data Availability: FLUXNET2015:   14 years (Duration: 2001 - 2014)
FLUXNET LaThuile:   6 years (Duration: 2001 - 2006)
Data Downloads to Date: FLUXNET2015:   2666 unique downloads
FLUXNET LaThuile:   282 unique downloads
Data DOIs: FLUXNET2015 DOI: 10.18140/FLX/1440092
Description: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.
Acknowledgments:This research was supported by the US Department of Energy Terrestrial Carbon Program, grant No. DE-FG03-00ER63013 and DE-SC0005130
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