US-Tw1: Twitchell Wetland West Pond

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Tower_team:
PI:	Dennis Baldocchi baldocchi@berkeley.edu - University of California, Berkeley
AncContact:	Joe Verfaillie jverfail@berkeley.edu - University of California, Berkeley
FluxContact:	Robert Shortt robert_shortt@berkeley.edu - University of California, Berkeley
Technician:	Daphne Szutu daphneszutu@berkeley.edu - UC Berkeley
Lat, Long:	38.1074, -121.6469
Elevation(m):	-5
Network Affiliations:	AmeriFlux, Phenocam
Vegetation IGBP:	WET (Permanent Wetlands: Lands with a permanent mixture of water and herbaceous or woody vegetation that cover extensive areas. The vegetation can be present in either salt, brackish, or fresh water)
Climate Koeppen:	Csa (Mediterranean: mild with dry, hot summer)
Mean Annual Temp (°C):	15.5
Mean Annual Precip. (mm):	421
Flux Species Measured:	CO2, CH4, H2O
Years Data Collected:	2012 - 2023
Years Data Available:	AmeriFlux BASE 2011 - 2023 Data Citation AmeriFlux FLUXNET 2011 - 2023 Data Citation
Data Use Policy:	AmeriFlux CC-BY-4.0 Policy¹
Description:	The Twitchell Wetland site is a 7.4-acre restored wetland on Twitchell Island, that is managed by the California Department of Water Resources (DWR) and ... The Twitchell Wetland 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). 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 and tules by the third growing season. A flux tower equipped to analyze energy, H2O, CO2, and CH4 fluxes was installed on May 17, 2012. See More Show Less
URL:	http://nature.berkeley.edu/biometlab/sites.php?tab=US-Tw1
Research Topics:	The research approach of the University of California, Berkeley Biometeorology Laboratory involves the coordinated use of experimental measurements and ... The research approach of the University of California, Berkeley Biometeorology Laboratory involves the coordinated use of experimental measurements and theoretical models to understand the physical, biological, and chemical processes that control trace gas fluxes between the biosphere and atmosphere and to quantify their temporal and spatial variations. The research objectives of the Mayberry Wetland, Twitchell Wetland, Sherman Island, Twitchell Island, Twitchell Alfalfa, and Twitchell Corn sites are as follows: 1) Describe differences in the fluxes of CO2, CH4, H2O, and energy between different land uses; 2) Understand the mechanisms controlling these fluxes; 3) Use ecosystem modeling to understand controls on these mechanisms under different environmental scenarios. These six sites were selected to capture a wide range of inundated conditions within the Sacramento-San Joaquin River Delta. The research focuses on the eddy covariance technique to measure CH4, CO2, H2O, and energy fluxes and works to combine measurements of both net fluxes and partitioned fluxes in order to achieve a mechanistic understanding of the ecological controls on current and future carbon flux in the Delta. See More Show Less
Acknowledgment:	Biometeorology Lab, University of California, Berkeley, PI: Dennis Baldocchi

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This site’s data can also be used under the more restrictive AmeriFlux Legacy Policy.
The AmeriFlux Legacy Policy must be followed if this site’s data are combined with data from sites that require the AmeriFlux Legacy Policy.

US-Tw1

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Image Credit: Joseph Verfaillie, 05/02/2012
Copyright preference: As long as credit is given

Site Publication More Site Publications

Oikawa, P. Y.; Jenerette, G. D.; Knox, S. H.; Sturtevant, C.; Verfaillie, J.; Dronova, I.; Poindexter, C. M. ; Eichelmann, E.; Baldocchi, D. D. 2017. Evaluation of a hierarchy of models reveals importance of substrate limitation for predicting carbon dioxide and methane exchange in restored wetlands, Journal of Geophysical Research: Biogeosciences, 122:1, 145-167.

Year	Publication
2021	Chu, H., Luo, X., Ouyang, Z., Chan, W. S., Dengel, S., Biraud, S. C., Torn, M. S., Metzger, S., Kumar, J., Arain, M. A., Arkebauer, T. J., Baldocchi, D., Bernacchi, C., Billesbach, D., Black, T. A., Blanken, P. D., Bohrer, G., Bracho, R., Brown, S., Brunsell, N. A., Chen, J., Chen, X., Clark, K., Desai, A. R., Duman, T., Durden, D., Fares, S., Forbrich, I., Gamon, J. A., Gough, C. M., Griffis, T., Helbig, M., Hollinger, D., Humphreys, E., Ikawa, H., Iwata, H., Ju, Y., Knowles, J. F., Knox, S. H., Kobayashi, H., Kolb, T., Law, B., Lee, X., Litvak, M., Liu, H., Munger, J. W., Noormets, A., Novick, K., Oberbauer, S. F., Oechel, W., Oikawa, P., Papuga, S. A., Pendall, E., Prajapati, P., Prueger, J., Quinton, W. L., Richardson, A. D., Russell, E. S., Scott, R. L., Starr, G., Staebler, R., Stoy, P. C., Stuart-Haëntjens, E., Sonnentag, O., Sullivan, R. C., Suyker, A., Ueyama, M., Vargas, R., Wood, J. D., Zona, D. (2021) Representativeness Of Eddy-Covariance Flux Footprints For Areas Surrounding Ameriflux Sites, Agricultural And Forest Meteorology, 301-302, 108350. https://doi.org/10.1016/j.agrformet.2021.108350
2021	Rey‐Sanchez, C., Wharton, S., Vilà‐Guerau de Arellano, J., Paw U, K. T., Hemes, K. S., Fuentes, J. D., Osuna, J., Szutu, D., Ribeiro, J. V., Verfaillie, J., Baldocchi, D. (2021) Evaluation Of Atmospheric Boundary Layer Height From Wind Profiling Radar And Slab Models And Its Responses To Seasonality Of Land Cover, Subsidence, And Advection, Journal Of Geophysical Research: Atmospheres, 126(7), . https://doi.org/10.1029/2020JD033775
2021	Valach, A. C., Kasak, K., Hemes, K. S., Anthony, T. L., Dronova, I., Taddeo, S., Silver, W. L., Szutu, D., Verfaillie, J., Baldocchi, D. D. (2021) Productive Wetlands Restored For Carbon Sequestration Quickly Become Net Co2 Sinks With Site-Level Factors Driving Uptake Variability, Plos One, 16(3), e0248398. https://doi.org/10.1371/journal.pone.0248398
2021	Valach, Alex C. Kasak, Kuno Hemes, Kyle S. Szutu, Daphne Verfaillie, Joe Baldocchi, Dennis D. (2021) Carbon Flux Trajectories and Site Conditions from Restored Impounded Marshes in the Sacramento-San Joaquin Delta, Wetland Carbon and Environmental Management, . https://doi.org/10.1002/9781119639305.ch13
2021	Arias‐Ortiz, A., Oikawa, P. Y., Carlin, J., Masqué, P., Shahan, J., Kanneg, S., Paytan, A., Baldocchi, D. D. (2021) Tidal And Nontidal Marsh Restoration: A Trade‐Off Between Carbon Sequestration, Methane Emissions, And Soil Accretion, Journal Of Geophysical Research: Biogeosciences, 126(12), . https://doi.org/10.1029/2021JG006573
2020	Hemes, K. S., Verfaillie, J., Baldocchi, D. D. (2020) Wildfire‐Smoke Aerosols Lead To Increased Light Use Efficiency Among Agricultural And Restored Wetland Land Uses In California’S Central Valley, Journal Of Geophysical Research: Biogeosciences, . https://doi.org/10.1029/2019JG005380
2020	Baldocchi, D. D., Ryu, Y., Dechant, B., Eichelmann, E., Hemes, K., Ma, S., Sanchez, C. R., Shortt, R., Szutu, D., Valach, A., Verfaillie, J., Badgley, G., Zeng, Y., Berry, J. A. (2020) Outgoing Near‐Infrared Radiation From Vegetation Scales With Canopy Photosynthesis Across A Spectrum Of Function, Structure, Physiological Capacity, And Weather, Journal Of Geophysical Research: Biogeosciences, 125(7), . https://doi.org/10.1029/2019jg005534
2019	Hemes, K. S., Chamberlain, S. D., Eichelmann, E., Anthony, T., Valach, A., Kasak, K., Szutu, D., Verfaillie, J., Silver, W. L., Baldocchi, D. D. (2019) Assessing The Carbon And Climate Benefit Of Restoring Degraded Agricultural Peat Soils To Managed Wetlands, Agricultural And Forest Meteorology, 268, 202-214. https://doi.org/10.1016/j.agrformet.2019.01.017
2019	Sullivan, R. C., Cook, D. R., Ghate, V. P., Kotamarthi, V. R., Feng, Y. (2019) Improved Spatiotemporal Representativeness And Bias Reduction Of Satellite-Based Evapotranspiration Retrievals Via Use Of In Situ Meteorology And Constrained Canopy Surface Resistance, Journal Of Geophysical Research: Biogeosciences, 124(2), 342-352. https://doi.org/10.1029/2018JG004744
2019	Sullivan, R. C., Kotamarthi, V. R., Feng, Y. (2019) Recovering Evapotranspiration Trends From Biased CMIP5 Simulations And Sensitivity To Changing Climate Over North America, Journal Of Hydrometeorology, 20(8), 1619-1633. https://doi.org/10.1175/JHM-D-18-0259.1
2019	Chamberlain, S. D., Hemes, K. S., Eichelmann, E., Szutu, D. J., Verfaillie, J. G., Baldocchi, D. D. (2019) Effect Of Drought-Induced Salinization On Wetland Methane Emissions, Gross Ecosystem Productivity, And Their Interactions, Ecosystems, . https://doi.org/10.1007/s10021-019-00430-5
2018	Eichelmann, E., Hemes, K. S., Knox, S. H., Oikawa, P. Y., Chamberlain, S. D., Sturtevant, C., Verfaillie, J., Baldocchi, D. D. (2018) The Effect Of Land Cover Type And Structure On Evapotranspiration From Agricultural And Wetland Sites In The Sacramento–San Joaquin River Delta, California, Agricultural And Forest Meteorology, 256-257, 179-195. https://doi.org/10.1016/j.agrformet.2018.03.007
2018	Hemes, K. S., Eichelmann, E., Chamberlain, S., Knox, S. H., Oikawa, P. Y., Sturtevant, C., Verfaillie, J., Szutu, D., Baldocchi, D. D. (2018) A Unique Combination Of Aerodynamic And Surface Properties Contribute To Surface Cooling In Restored Wetlands Of The Sacramento-San Joaquin Delta, California, Journal Of Geophysical Research: Biogeosciences, . https://doi.org/10.1029/2018JG004494
2018	Hemes, K. S., Chamberlain, S. D., Eichelmann, E., Knox, S. H., Baldocchi, D. D. (2018) A Biogeochemical Compromise: The High Methane Cost Of Sequestering Carbon In Restored Wetlands, Geophysical Research Letters, . https://doi.org/10.1029/2018GL077747
2018	Baldocchi, D., Penuelas, J. (2018) The Physics And Ecology Of Mining Carbon Dioxide From The Atmosphere By Ecosystems, Global Change Biology, . https://doi.org/10.1111/gcb.14559
2017	Oikawa, P. Y.; Jenerette, G. D.; Knox, S. H.; Sturtevant, C.; Verfaillie, J.; Dronova, I.; Poindexter, C. M. ; Eichelmann, E.; Baldocchi, D. D. (2017) Evaluation of a hierarchy of models reveals importance of substrate limitation for predicting carbon dioxide and methane exchange in restored wetlands, Journal of Geophysical Research: Biogeosciences, 122(1), 145-167. https://doi.org/10.1002/2016JG003438
2017	Knox, Sara Helen Dronova, Iryna Sturtevant, Cove Oikawa, Patricia Y. Matthes, Jaclyn Hatala Verfaillie, Joseph Baldocchi, Dennis (2017) Using digital camera and Landsat imagery with eddy covariance data to model gross primary production in restored wetlands, Agricultural and Forest Meteorology, 237–238, 233-245. https://doi.org/http://dx.doi.org/10.1016/j.agrformet.2017.02.020
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, . https://doi.org/10.1007/s10546-017-0275-9
2016	Poindexter, C. M., D. D. Baldocchi, J. H. Matthes, S. H. Knox, and E. A. Variano. (2016) The contribution of an overlooked transport process to a wetland’s methane emissions., Geophysical Research Letters, 43, 6276-6284. https://doi.org/10.1002/2016gl068782
2014	Knox, S. H.,, Sturtevant, C., Matthes, J.H., Koteen, L., Verfaillie,J., Baldocchi. D. (2014) Agricultural peatland restoration: effects of land-use change on greenhouse gas (CO2 and CH4) fluxes in the Sacramento-San Joaquin Delta, Global Change Biology, 21, 750-765. https://doi.org/10.1111/gcb.12745
2010	Miller, R. L., Fujii, R. (2010) 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. https://doi.org/10.1007/s11273-009-9143-9
2008	Miller, R. L., Fram, M., Fuji, R., Wheeler, G. (2008) Subsidence Reversal In A Re-Established Wetland In The Sacramento-San Joaquin Delta, California, USA, San Francisco Estuary And Watershed Science, 6(3), n/a-n/a. https://doi.org/10.15447/sfews.2008v6iss3art1

US-Tw1: Twitchell Wetland West Pond

US-Tw1: Twitchell Wetland West Pond

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US-Tw1: Twitchell Wetland West Pond

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US-Tw1: Twitchell Wetland West Pond

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Acknowledgments

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US-Tw1: Twitchell Wetland West Pond

US-Tw1: Twitchell Wetland West Pond

Nice Sunset

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Nice sunset

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Buried in thatch

Eddy Sesnors

US-Tw1: Twitchell Wetland West Pond

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NDVI: Normalized Difference Vegetation Index

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LST: Land Surface Temperature

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US-Tw1: Twitchell Wetland West Pond

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