Site Description
The San Joaquin Freshwater Marsh (SJFM) reserve is located <1 mile from the the University of California, Irvine in Southern California (33.66° N; -117.85° W). The site contains two eddy covariance towers which are situated in Cattail (Typha latifolia) dominated freshwater marshes. Stand age is ~30 years and the hydroperiod is partly managed by the SJFM UC Reserve and the Irvine Ranch Water District. |
Instrumentation
Data Timeseries: |
Tower 1:1999-Present Tower 2: 2003-Present |
|
CO2/H2O concentration |
LI7000 Closed path IRGA |
|
3D Wind & Temp |
CSAT3 Sonic Anemometer |
|
Incoming and reflected PAR |
LI90-SZ Quantum Sensor |
|
Incoming and reflected Solar |
CM3 Pyranometer (Kipp and Zonen) |
|
Control/Data Collection |
CR10X or CR23 X DataLogger (Campbell Scientific) |
Publications
Goulden, M.L., M.C. Litvak, and S.D, Miller (2007) Factors controlling Marsh Evapotranspiration. Aquatic Botany. 58:97-106. [pdf]
Rocha AV, Goulden ML (2008) Large interannual CO2 and energy exchange variability in a freshwater marsh under consistent environmental conditions. Journal of Geophysical Research-Biogeosciences Volume: 113 Issue: G4 Article Number: G04019Rocha AV, Potts DL, Goulden ML (2008) Standing litter as a driver of interannual CO2 exchange variability in a freshwater marsh. Journal of Geophysical Research-Biogeosciences Volume: 113 Issue: G4 Article Number: G04020
Rocha AV, Goulden ML (2009) Why is marsh productivity so high? New
insights from eddy covariance and biomass measurements in a Typha
marsh. Agricultural and Forest Meteorology, Volume 149, Issue 1
Data Access
* * * * FAIR USE * * * *
* * PLEASE READ CAREFULLY * *
Please email Mike Goulden (mgoulden@uci.edu) if you plan to use the data. The data contained on this site are freely available and we encourage others to use it. We require that an agreement on authorship be reached prior to publication and that the data source is acknowledged as either a citation or in the acknowledgments in your publication. These data may be updated or reprocessed from time to time and it is your responsibility to insure that your publication contains the most recent revision of the data.
In order to maintain these measurements we periodically
need to demonstrate progress to our sponsoring agencies. In
addition to informing us of your plans, we request that you also
inform us on the status of your publication.
Meta Data [txt]
Tower 1 Data
Tower 1 Half hour Eddy Covariance Data (1999-2009) [matlab] [txt] *Updated: 3/26/10
Tower 1 Ecological/Biological Data [xls]
Tower 2 Data
Tower 2 Half hour Eddy Covariance Data (2003-2009) [matlab] [txt] *Updated: 3/26/10
Tower 2 Ecological/Biological Data [xls]
Note - These
flux
towers are maintained with minimal $
support (none! - but we're not complaining - we keep them
going because
it's fun). A number of measurements have deteriorated
over the
study - especially radiation, temperature, and CO2
concentration. The
Sensible and CO2 fluxes are in comparatively good shape, and are
thought to be stable
over the study. We have not gone out of our way
to clean up the
time
series - we have posted the data set largely as is, with the philosophy
that it
doesn't hurt to allow people access to a messy data set, provided they
have
been warned it is messy.