General Site Information
Site ID:US-Snd
Site Name:Sherman Island
Tower Team: PI: Dennis Baldocchi <> - University of California, Berkeley
AncContact: Joe Verfaillie <> - University of California, Berkeley
FluxContact: Patty Oikwawa <> - Cal State East Bay, Hayward, CA
Affiliate: Matteo Detto <> - Smithsonian Tropical Research Institute
Elevation (m):-5
IGBP:GRA (Grasslands)
Climate Koeppen:Csa (Mediterranean: mild with dry, hot summer)
Mean Annual Temperature (degrees C):15.6
Mean Annual Precipitation (mm):358
Data Products: AmeriFlux BASE Dataset
Data Availability: AmeriFlux BASE:   8 years (Duration: 2007 - 2014)
Data Downloads to Date: AmeriFlux BASE:   166 unique downloads
Data DOIs: AmeriFlux BASE DOI: 10.17190/AMF/1246094
Description:The Sherman Island site is a 38-ha peatland pasture, west of the Delta, that is owned by the state and managed by the California Department of Water Resources. The site is degraded and heavily grazed with ~100 cattle in the area that circumscribes the main field and fetch. The island has been drained and farmed since the late 1800s. The soils of the Delta overlay deep peat that was sequestered over the Holocene period as sea-level rose and flooding of archaic wetlands prevented decomposition of roots and stems. Hence, the upper 10 m of peatland has been lost to decomposition, compaction, and subsidence. Today a mineral soil overlays a peat layer, which coincides with the general depth of the water table. This site was discontinued in 2015 as the land was converted into a restored wetland. A new site was established in 2016 nearby, US_Sne
Acknowledgments:Biometeorology Lab, University of California, Berkeley, PI: Dennis Baldocchi
Site image(s):
For additional AmeriFlux site images, see the Web site gallery

Publications relevant to understanding the site
Baldocchi, D., M. Detto, O. Sonnentag, J. Verfaillie, Y. A. Teh, W. Silver, and N. M. Kelly (2012), The challenges of measuring methane fluxes and concentrations over a peatland pasture, Agricultural and Forest Meteorology, 153, 177-187. Reference
Detto, M., D. Baldocchi, and G. G. Katul (2010), Scaling Properties of Biologically Active Scalar Concentration Fluctuations in the Atmospheric Surface Layer over a Managed Peatland, Boundary-Layer Meteorology, 136(3), 407-430. Reference
Detto, M., J. Verfaillie, F. Anderson, L. Xu, and D. Baldocchi (2011), Comparing laser-based open- and closed-path gas analyzers to measure methane fluxes using the eddy covariance method, Agricultural and Forest Meteorology, 151(10), 1312-1324. Reference
Hatala, J. A., M. Detto, O. Sonnentag, S. J. Deverel, J. Verfaillie, and D. D. Baldocchi (2012), Greenhouse gas (CO2, CH4, H2O) fluxes from drained and flooded agricultural peatlands in the Sacramento-San Joaquin Delta, Agriculture, Ecosystems & Environment, 150, 1-18. Primary_Citation
Ma, S., D. D. Baldocchi, J. A. Hatala, M. Detto, and J. Curiel Yuste (2012), Are rain-induced ecosystem respiration pulses enhanced by legacies of antecedent photodegradation in semi-arid environments?, Agricultural and Forest Meteorology, 154-155, 203-213. Reference
Sonnentag, O., M. Detto, B. R. K. Runkle, Y. A. Teh, W. L. Silver, M. Kelly, and D. D. Baldocchi (2011), Carbon dioxide exchange of a pepperweed (Lepidium latifoliumL.) infestation: How do flowering and mowing affect canopy photosynthesis and autotrophic respiration?, Journal of Geophysical Research, 116(G1). Reference
Sonnentag, O., M. Detto, R. Vargas, Y. Ryu, B. R. K. Runkle, M. Kelly, and D. D. Baldocchi (2011), Tracking the structural and functional development of a perennial pepperweed (Lepidium latifolium L.) infestation using a multi-year archive of webcam imagery and eddy covariance measurements, Agricultural and Forest Meteorology, 151(7), 916-926. Reference
Teh, Y. A., W. L. Silver, O. Sonnentag, M. Detto, M. Kelly, and D. D. Baldocchi (2011), Large Greenhouse Gas Emissions from a Temperate Peatland Pasture, Ecosystems, 14(2), 311-325. Reference

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