General Site Information
Site ID:US-Var
Site Name:Vaira Ranch- Ione
Tower Team: PI: Dennis Baldocchi <> - University of California, Berkeley
AncContact: Joe Verfaillie <> - University of California, Berkeley
FluxContact: Siyan Ma <> - University of California, Berkeley
Elevation (m):129
IGBP:GRA (Grasslands)
Climate Koeppen:Csa (Mediterranean: mild with dry, hot summer)
Mean Annual Temperature (degrees C):15.8
Mean Annual Precipitation (mm):559
Data Products: AmeriFlux BASE Dataset
FLUXNET2015 Dataset
FLUXNET LaThuile Dataset
Data Availability: AmeriFlux BASE:   16 years (Duration: 2000 - 2015)
FLUXNET2015:   15 years (Duration: 2000 - 2014)
FLUXNET LaThuile:   6 years (Duration: 2001 - 2006)
Data Downloads to Date: AmeriFlux BASE:   303 unique downloads
FLUXNET2015:   795 unique downloads
FLUXNET LaThuile:   267 unique downloads
Data DOIs: AmeriFlux BASE DOI: 10.17190/AMF/1245984
Description:Located in the lower foothills of the Sierra Nevada Mountains on privately owned land, the Vaira Ranch site is classified as a grassland dominated by C3 annual grasses. Managed by local rancher, Fran Vaira, brush has been periodically removed for cattle grazing. Species include a variety of grasses and herbs, including purple false brome, smooth cat's ear, and rose clover. Growing season is confined to the wet season only, typically from October to early May.
Acknowledgments:This research was supported in part by the Office of Science (BER), U.S. Department of Energy, Grant No. DE-FG02-03ER63638
Site image(s):
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Publications relevant to understanding the site
D. D. Baldocchi; L. K. Xu; N. Kiang. 2004. How plant functional-type, weather, seasonal drought, and soil physical properties alter water and energy fluxes of an oak-grass savanna and an annual grasslandAgricultural and Forest Meteorology. 123:1-2, 13-39. Reference
Daniel A. Sims; Abdullah F. Rahman; Vicente D. Cordova; Dennis D. Baldocchi; Lawrence B. Flanagan; Allen H. Goldstein; David Y. Hollinger; Laurent Misson; Russell K. Monson; Hans P. Schmid. 2005. Midday values of gross CO2 flux and light use efficiency during satellite overpasses can be used to directly estimate eight-day mean fluxAgricultural and Forest Meteorology. 131:1-2, 1-12. Reference
Grant, R. F., D. D. Baldocchi, and S. Ma (2012), Ecological controls on net ecosystem productivity of a seasonally dry annual grassland under current and future climates: Modelling with ecosys, Agricultural and Forest Meteorology, 152, 189-200. Reference
J. Kim; Q. Guo; D.D. Baldocchi; M.Y. Leclerc; L. Xu; H.P. Schmid. 2006. Upscaling fluxes from tower to landscape: Overlaying flux footprints on high-resolution (IKONOS) images of vegetation coverAgricultural and Forest Meteorology. 136:3-4, 132-146. Reference
L. H. Gu; E. M. Falge; T. Boden; D. D. Baldocchi; T. A. Black; S. R. Saleska; T. Suni; S. B. Verma; T. Vesala; S. C. Wofsy; L. K. Xu. 2005. Objective threshold determination for nighttime eddy flux filteringAgricultural and Forest Meteorology. 128:3-4, 179-197. Reference
L. Xu; D.D. Baldocchi; J. Tang. 2004. How soil moisture, rain pulses, and growth alter the response of ecosystem respiration to temperatureGlobal Biogeochemical Cycles. 18:4, GB4002 10.1029/2004GB002281. Reference
Liukang Xu; Dennis D. Baldocchi. 2004. Seasonal variation in carbon dioxide exchange over a Mediterranean annual grassland in CaliforniaAgricultural and Forest Meteorology. 123:1-2, 79-96. Reference
Ma, S., Baldocchi, D.D., Xu, L., & Hehn, T. (2007). Inter-annual variability in carbon dioxide exchange of an oak/grass savanna and open grassland in California. Agricultural and Forest Meteorology, 147, 157-171 Primary_Citation
Ryu Y, Baldocchi DD, Ma S, Hehn T (2008) Interannual variability of evapotranspiration and energy exchange over an annual grassland in California. J. Geophys. Res. 113: D09104, doi:09110.01029/02007JD009263. Reference
Xu, L. and Baldocchi, D.D., 2004. Seasonal variation in carbon dioxide exchange over a Mediterranean annual grassland in California. Agricultural and Forest Meteorology, 123(1-2): 79-96. Reference

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