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Site tower team member name (First Last/Family).: |
Dennis Baldocchi |
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Site tower team member role: |
PI (LIST(TEAM_ROLE)) |
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Site tower team member email: |
baldocchi@berkeley.edu |
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Site tower team member institution (required for PI only): |
University of California, Berkeley |
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Site tower team member address (not required): |
Department of Environmental Science, Policy and Management
130 Mulford Hall |
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Site tower shipping address: |
54 Mulford Hall Berkeley, CA 94720 |
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Network affiliation(s) of the site.: |
AmeriFlux (LIST(NETWORK)) |
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Method used to measure the flux variables: |
(LIST(FLUX_METHOD)) |
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Flux variable measured: |
(LIST(FLUX_VARIABLE)) |
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Date when data collection for the reported flux variable/method started.: |
(YYYYMMDDHHMM) |
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Date when data collection for the reported flux variable/method ended: |
(YYYYMMDDHHMM) |
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Operational status of flux measurements.: |
(LIST(FLUX_OPERATIONS)) |
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Flux measurements comments: |
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State or province: |
California (LIST(STATE_PROVINCE)) |
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Short description of the site characteristics and history: |
The site is a 7.4-acre restored wetland on Twitchell Island, that is managed by the California Department of Water Resources (DWR) and the U.S. Geological Survey (USGS). It forms a rectangle that is aligned east-west along the predominate wind direction of the region. In the fall of 1997, the site was permanently flooded to a depth of approximately 25 cm. The wetland was almost completely covered by cattails (Typha spp.) and
tules (Schoenoplectus acutus) by the third growing season. A flux tower equipped to analyze energy, H2O, CO2, and CH4 fluxes was installed on May 17, 2012.
Details on this pilot study are produced in a set of papers by Miller and colleagues [R. L. Miller and Fujii, 2010; R.L. Miller et al., 2000; R.L. Miller et al., 2008].
The fetch of this site extends 160 m in the predominant wind direction (252 degree counterclockwise from true North). We have to reject data when the wind direction lies outside of 240 to 290 degree counter clockwise from true North. |
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Site research topics: |
Methane emissions from wetlands
Carbon, water and energy fluxes
Remote sensing of NPP and LAI
Convective controls of water-air gas exchange
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Site funding agencies/institutions (one column only): |
California Department of Water Resources |
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Latitude of the site.: |
38.1074333333333 (decimal deg ref WGS84) |
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Longitude of the site: |
-121.6469 (decimal deg ref WGS84) |
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Elevation of the site above sea level: |
-9 (m) |
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Begin date of the location information: |
(YYYYMMDDHHMM) |
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Location information comments: |
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Vegetation type based on the IGBP definition.: |
WET (LIST(IGBP)) |
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Date when this vegetation type first applied: |
(YYYYMMDDHHMM) |
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Vegetation type comments: |
Schoenoplectus acutus (tules) and Typha spp. (cattails) dominate the site. |
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Land ownership type: |
public (LIST(LAND_OWNERSHIP)) |
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Land owner: |
California Department of Water Resources |
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Tower web site URL (maintained by tower team): |
(URL) |
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Papers relevant for understanding the site: |
Miller, R. L. (2011), Carbon Gas Fluxes in Re-Established Wetlands
on Organic Soils Differ Relative to Plant Community and Hydrology, Wetlands, DOI 10.1007/s13157-011-0215-2.
Miller, R. L., and R. Fujii (2009), Plant community, primary productivity, and environmental conditions following wetland re-establishment in the Sacramento-San Joaquin Delta, California, Wetlands Ecology and Management, 18(1), 1-16.
Miller, R. L., M. Fram, R. Fujii, and G. Wheeler (2008), Subsidence reversal in a re-established wetland in the Sacramento-San Joaquin Delta, California,
USA, San Francisco Estuary and Watershed, October 2008.
Miller, R. L., L. Hastings, and R. Fujii (2000), Hydrological treatments affect gaseous carbon losses from organic soils, Twitchell Island, California, October, 1995-December, 1997.Rep. 00-4042, U.S. Geological Survey |
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DOI of the reference: |
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Suggested use of the reference: |
(LIST(REFERENCE_USAGE)) |
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Brief description of paper relevance or other comments: |
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Acknowledgement text (88 character limit): |
This project California Department of Water Resource Contract 006550 |
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Additional information about the acknowledgement: |
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Offset from UTC of site data: |
-8 (hours) |
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Begin date of the UTC offset: |
(YYYYMMDDHHMM) |
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Offset from UTC comments: |
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Climatological long-term mean annual average air temperature: |
15.5 (degrees C) |
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Climatological long-term mean annual average precipitation: |
420 (mm) |
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K�ppen climate classification: |
(LIST(CLIMATE_KOEPPEN)) |
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Slope and/or relief of the site: |
(LIST(TERRAIN)) |
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Direction the site is facing (Exposure): |
(LIST(ASPECT)) |
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Prevailing wind direction: |
252 (LIST(DIR)) |
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Distance for which the ecosystem is homogeneous in the prevailing wind direction.: |
(m) |
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Days per year that the site is covered by snow: |
(days) |
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Recent and historic disturbance and management events that affect the tower site years of measurement: |
(LIST(DIST_MGMT)) |
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Type of physical tower structure used in the site: |
(LIST(TOWER_TYPE)) |
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How the eddy covariance system is powered: |
(LIST(TOWER_POWER)) |
