US-Tw1: Twitchell Wetland West Pond
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 - Present |
Years Data Available: | AmeriFlux BASE 2011 - 2020 Data Citation AmeriFlux FLUXNET 2011 - 2020 Data Citation |
Data Use Policy: | AmeriFlux CC-BY-4.0 Policy1 |
Description: | |
URL: | http://nature.berkeley.edu/biometlab/sites.php?tab=US-Tw1 |
Research Topics: | |
Acknowledgment: | Biometeorology Lab, University of California, Berkeley, PI: Dennis Baldocchi |
- This siteās data can also be used under the more restrictive AmeriFlux Legacy Policy.
The AmeriFlux Legacy Policy must be followed if this siteās data are combined with data from sites that require the AmeriFlux Legacy Policy.

Copyright preference: As long as credit is given
US-Tw1: Twitchell Wetland West Pond
Use the information below for citation of this site. See the Data Policy page for more details.
DOI(s) for citing US-Tw1 data
Data Use Policy: AmeriFlux CC-BY-4.0 License
This siteās data can also be used under the more restrictive AmeriFlux Legacy Policy.
The AmeriFlux Legacy Policy must be followed if US-Tw1 data are combined with data from sites that require the AmeriFlux Legacy Policy.
- AmeriFlux BASE: https://doi.org/10.17190/AMF/1246147
Citation: Alex Valach, Robert Shortt, Daphne Szutu, Elke Eichelmann, Sara Knox, Kyle Hemes, Joseph Verfaillie, Dennis Baldocchi (2021), AmeriFlux BASE US-Tw1 Twitchell Wetland West Pond, Ver. 9-5, AmeriFlux AMP, (Dataset). https://doi.org/10.17190/AMF/1246147 - AmeriFlux FLUXNET: https://doi.org/10.17190/AMF/1832165
Citation: Alex Valach, Robert Shortt, Daphne Szutu, Elke Eichelmann, Sara Knox, Kyle Hemes, Joseph Verfaillie, Dennis Baldocchi (2021), AmeriFlux FLUXNET-1F US-Tw1 Twitchell Wetland West Pond, Ver. 3-5, AmeriFlux AMP, (Dataset). https://doi.org/10.17190/AMF/1832165
Find global FLUXNET datasets, like FLUXNET2015 and FLUXNET-CH4, and their citation information at fluxnet.org.
To cite BADM when downloaded on their own, use the publications below for citing site characterization. When using BADM that are downloaded with AmeriFlux BASE and AmeriFlux FLUXNET products, use the DOI citation for the associated data product.
Publication(s) for citing site characterization
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US-Tw1: Twitchell Wetland West Pond
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US-Tw1: Twitchell Wetland West Pond
AmeriFlux Images | Add Image |

Nice Sunset
Sunset from auto camera
Location: California, United States
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Smoke From Wildfires
Smoke From Wildfires
Location: California, United States
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Nice sunset
Sunset from auto camera
Location: California, United States
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Great Blue Heron
Great Blue Heron checking things out
Location: California, United States
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Buried in thatch
Dead tules from the previous year
Location: California, United States
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Eddy Sesnors
Freshly installed eddy, solar radiation and RH/Temp
Location: California, United States
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US-Tw1: Twitchell Wetland West Pond
MODIS NDVI
The time series shows the 16-day Normalized Difference Vegetation Index (NDVI) average from the MOD13Q1 data product.
Use the slider below the time series to zoom in and out.
To view / download these data and other MOD13Q1 products for this site, visit MODIS/Terra Vegetation Indices.
For other related products, visit MODIS/VIIRS Fixed Sites Subsets Tool.
Citation:
ORNL DAAC. 2018. MODIS and VIIRS Land Products Fixed Sites Subsetting and Visualization Tool. ORNL DAAC, Oak Ridge, Tennessee, USA. https://doi.org/10.3334/ORNLDAAC/1567
MODIS NDVI subsetted data is not yet available for this site.
For a complete list of AmeriFlux sites, visit ORNL DAAC's MODIS/VIIRS Fixed Sites Subsets Tool.
US-Tw1: Twitchell Wetland West Pond
AmeriFlux Publications | Add Publication |
Year | Publication |
---|---|
2021 | AriasāOrtiz, A., Oikawa, P. Y., Carlin, J., MasquĆ©, P., Shahan, J., Kanneg, S., Paytan, A., Baldocchi, D. D. (2021) Tidal And Nontidal Marsh Restoration: A TradeāOff Between Carbon Sequestration, Methane Emissions, And Soil Accretion, Journal Of Geophysical Research: Biogeosciences, 126(12), . https://doi.org/10.1029/2021JG006573 |
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 | 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 | ReyāSanchez, C., Wharton, S., VilĆ āGuerau 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 |
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 NearāInfrared 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 |
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-Haƫntjens, 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 |
2020 | Hemes, K. S., Verfaillie, J., Baldocchi, D. D. (2020) WildfireāSmoke 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 |
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 |
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 | 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 | 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 |
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 |
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 | 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 | 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 SacramentoāSan Joaquin River Delta, California, Agricultural And Forest Meteorology, 256-257, 179-195. https://doi.org/10.1016/j.agrformet.2018.03.007 |
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 |
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, 237ā238, 233-245. https://doi.org/http://dx.doi.org/10.1016/j.agrformet.2017.02.020 |
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 |
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 |
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 |
US-Tw1: Twitchell Wetland West Pond
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 siteās vegetation and soil, describing disturbance history, and defining instrumentation for flux processing. They complement the flux/met data.
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US-Tw1: Twitchell Wetland West Pond
Wind Roses
Wind Speed (m/s)
- Wind Speed Scale: Per Site
- Wind Direction Scale (%): Per Site
- Wind Speed Scale: Non-Linear
- Wind Direction Scale (%): AmeriFlux