AmeriFlux Logo
Tower_team:
PI: Dennis Baldocchi baldocchi@berkeley.edu - University of California, Berkeley
FluxContact: Sam Chamberlain schamberlain@berkeley.edu - UC Berkeley
Technician: Daphne Szutu daphneszutu@berkeley.edu - UC Berkeley
Technician: Joe Verfaillie jverfail@berkeley.edu - University of California, Berkeley
affiliate: Patty Oikawa pattyoikawa@berkeley.edu - University of California, Berkeley
Lat, Long: 38.1159, -121.6467
Elevation(m): -9
Network Affiliations: AmeriFlux
Vegetation IGBP: CRO (Croplands)
Climate Koeppen: Csa (Mediterranean: mild with dry, hot summer)
Mean Annual Temp (°C): 15.6
Mean Annual Precip. (mm): 421
Flux Species Measured: CH4, CO2
Years Data Collected: AmeriFlux: 2013 - Present
Description:
The Twitchell Alfalfa site is an alfalfa field owned by the state of California and leased to third parties for farming. The tower was installed on May ...
See MoreShow Less
URL: http://nature.berkeley.edu/biometlab/sites.php?tab=US-Tw3
Research Topics:
The research approach of the University of California, Berkeley Biometeorology Laboratory involves the coordinated use of experimental measurements and ...
See MoreShow Less
Acknowledgment: Biometeorology Lab, University of California, Berkeley, PI: Dennis Baldocchi
California Department of Water Resources, DOE AmeriFlux; Biometeorology Lab, University of California, Berkeley, PI: Dennis Baldocchi
Site Photo More Site Images
AmeriFlux Logo

Site Publication More Site Publications
Oikawa, P. Y., C. Sturtevant, S. H. Knox, J. Verfaillie, Y. W. Huang, and D. D. Baldocchi. 2017. Revisiting the partitioning of net ecosystem exchange of CO2 into photosynthesis and respiration with simultaneous flux measurements of 13CO2 and CO2, soil respiration and a biophysical model, CANVEG., Agricultural and Forest Meteorology, 234, 149-163.

Instructions for DOIs for This Site

When using DOIs for this site, use the publications and acknowledgments listed below.

DOIs

Publications to use for Citations for this Site

Acknowledgements

  • Biometeorology Lab, University of California, Berkeley, PI: Dennis Baldocchi
  • California Department of Water Resources, DOE AmeriFlux; Biometeorology Lab, University of California, Berkeley, PI: Dennis Baldocchi

Resources

This page displays the list of downloads of data for the site {{siteId}}.

NOTE: Version refers to the version of the AmeriFlux BASE-BADM product for the site was downloaded by the user and the download count indicates the number of times the person downloaded that version. The download count indicates the number of times the person downloaded the data.

Year Range
 Showing {{startItem + 1}} to {{(startItem + items) > filtered.length ? filtered.length : (startItem + items)}} of {{filtered.length}} results
Products

Items Per Page:  
Date Email Name Version Intended Use Intended Use Description Download Count
{{dlObject.timeStamp}} {{dlObject.email}} {{dlObject.displayName}} {{dlObject.version}} {{dlObject.intendedUse}} {{dlObject.comment}} {{dlObject.downloadCounter}}
No results to display
Date Name Product Version Intended Use Intended Use Description Download Count
{{dlObject.timeStamp}} {{dlObject.displayName}} {{dlObject.dataProduct}} {{dlObject.version}} {{dlObject.intendedUse}} {{dlObject.comment}} {{dlObject.downloadCounter}}
No results to display

 Showing {{startItem + 1}} to {{(startItem + items) > filtered.length ? filtered.length : (startItem + items)}} of {{filtered.length}} results

Items Per Page:  

Not Found

Uh Oh. Something is missing. Try double checking the URL and try again.

MODIS NDVI

Normalized Difference Vegetation Index image for this site.

For time series, data download and other MODIS products for this site, visit MODIS cutouts.

Citation

Loading...

Citation:

ORNL DAAC. 2008. MODIS Collection 5 Fixed Sites Subsetting and Visualization Tool. ORNL DAAC, Oak Ridge, Tennessee, USA. http://dx.doi.org/10.3334/ORNLDAAC/1251

Read more on how to cite these MODIS images. Data come from NASA’s MODIS instruments installed on satellites Terra and Aqua, which scan the entire Earth’s surface every one to two days.

Year Publication
2017 Chamberlain, S. D., Verfaillie, J., Eichelmann, E., Hemes, K. S., Baldocchi, D. D. (2017) Evaluation Of Density Corrections To Methane Fluxes Measured By Open-Path Eddy Covariance Over Contrasting Landscapes, Boundary-Layer Meteorology, .
2015 Dennis Baldocchi, Cove Sturtevant (2015) Does day and night sampling reduce spurious correlation between canopy photosynthesis and ecosystem respiration?, Agricultural and Forest Meteorology, 207, 117-126.
2017 Oikawa, P. Y., C. Sturtevant, S. H. Knox, J. Verfaillie, Y. W. Huang, and D. D. Baldocchi. (2017) Revisiting the partitioning of net ecosystem exchange of CO2 into photosynthesis and respiration with simultaneous flux measurements of 13CO2 and CO2, soil respiration and a biophysical model, CANVEG., Agricultural and Forest Meteorology, 234, 149-163.

BADM for This Site

Access the Biological, Ancillary, Disturbance and Metadata (BADM) information and data for this site.

BADM contain information for many uses, such as characterizing a site’s vegetation and soil, describing disturbance history, and defining instrumentation for flux processing. They complement the flux/met data.

* Online updates are shown on the Overview tab real time. However, downloaded BADM files will not reflect those updates until they have been reviewed for QA/QC.

Wind Roses

Click an image below to enlarge it, or use the navigation panel.
For more display options, view an enlarged version.
  • Image scales: 799m x 799m (small); 1597m x 1597m (large)
  • Data Collected:
  • Wind roses use variables ‘WS’ and ‘WD’.
    Download Data
  • Graph Type
  • Step Type
  • Scale (%)
  • Show Satellite Image
  • Show Wind Rose
  • Wind Speed (m/s)

  • Graph Type
  • Step Type
  • Scale (%)
  • Show Satellite Image
  • Show Wind Rose
  • Annual Average
    About Ameriflux Wind Roses
    Mar - Jun; 6am - 6pm
    Mar - Jun; 6pm - 6am
    Jun - Sep; 6am - 6pm
    Jun - Sep; 6pm - 6am
    Sep - Dec; 6am - 6pm
    Sep - Dec; 6pm - 6am
    Dec - Mar; 6am - 6pm
    Dec - Mar; 6pm - 6am
    Press here to download chart as png file (background image is not included)