US-SJ2: San Joaquin (Freshwater Marsh Tower 2)
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| Tower_team: | |
| PI: | Mike Goulden mgoulden@uci.edu - University of California - Irvine |
| Lat, Long: | 33.6596, -117.8550 |
| Elevation(m): | 3 |
| Network Affiliations: | AmeriFlux |
| 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: | — |
| Mean Annual Temp (°C): | — |
| Mean Annual Precip. (mm): | — |
| Flux Species Measured: | CO2 |
| Years Data Collected: | 2003 - Present |
| Years Data Available: | No data available |
| Data Use Policy: | AmeriFlux Legacy Policy |
| Description: | Half hour data files are available at: http://www.ess.uci.edu/~marsh/. This is one of two paired flux towers that were located in separate ponds that were ... Half hour data files are available at: http://www.ess.uci.edu/~marsh/. This is one of two paired flux towers that were located in separate ponds that were subject to different water treatments (US-SJ1 and US-SJ2). Tower 2 is located in the southeastern corner, placing it on the farthest side from the predictable easterly oceanic breeze. The San Joaquin Marsh is one of the final remnants of a wetland, prior to the early 1900's, covered 2100 ha along San Diego Creek. Most of the regional wetlands were drained for agriculture in the early 20th century. Despite regional wetland removal, the San Joaquin remained intact. During the 1950's, vegetation was cleared to promote duck hunting. No further disturbances have occurred since the clearing. The hydroperiod is partly managed by the SJFM VC Reserve and the Irvine Ranch Water District. During the spring months, water volume begins to reduce by evapotranspiration and subsurface draining. The remaining standing water disappears during the summer. The wetland is annually replenished in January and December to a depth of 1 m in an effort to mimic natural hydrocycles. See MoreShow Less |
| URL: | http://www.ess.uci.edu/~marsh/ |
| Research Topics: | 1) Spatial and temporal patterns of wetland evapotranspiration, primary production, and nutrient cycling; 2) Rate and seasonal variation of canopy, subcanopy, ... 1) Spatial and temporal patterns of wetland evapotranspiration, primary production, and nutrient cycling; 2) Rate and seasonal variation of canopy, subcanopy, and total evapotranspiration; 3) Controls and limits of total evapotranspiration See MoreShow Less |
| Acknowledgment: | — |
US-SJ2: San Joaquin (Freshwater Marsh Tower 2)
- Overview
- Windroses
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- Image Gallery
- Remote Sensing Data
- MODIS
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Use the information below for citation of this site. See the Data Policy page for more details.
DOI(s) for citing US-SJ2 data
Data Use Policy: AmeriFlux Legacy Policy
- No DOIs available for US-SJ2
To cite BADM downloaded as a BIF file, use the publications listed below.
Publication(s) for citing site characterization
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Acknowledgments
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Resources
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US-SJ2: San Joaquin (Freshwater Marsh Tower 2)
- Overview
- Windroses
- Data Citation
- Data Use Log
- Image Gallery
- Remote Sensing Data
- MODIS
- PhenoCam
- GeoNEX
- Publications
- BADM
This page displays the list of downloads of data for the site US-SJ2.
Note: Results are the number of downloads to distinct data users. The Download Count column indicates the number of times the data user downloaded the data. The Version column refers to the version of the data product for the site that was downloaded by the data user.
| Date | Name | Data Product | Version | Intended Use | Intended Use Description | Download Count |
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| Date | Name | Data Product | Vers. | Intended Use | Intended Use Description | Download Count |
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US-SJ2: San Joaquin (Freshwater Marsh Tower 2)
- Overview
- Windroses
- Data Citation
- Data Use Log
- Image Gallery
- Remote Sensing Data
- MODIS
- PhenoCam
- GeoNEX
- Publications
- BADM
| AmeriFlux Images | Add Image |
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US-SJ2: San Joaquin (Freshwater Marsh Tower 2)
- Overview
- Windroses
- Data Citation
- Data Use Log
- Image Gallery
- Remote Sensing Data
- MODIS
- PhenoCam
- GeoNEX
- Publications
- BADM
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. Terrestrial Ecology Subsetting & Visualization Services (TESViS) Fixed Sites Subsets. 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.
PhenoCam Images and Derived Time Series Data
PhenoCams are high-resolution digital cameras that take repeated images of studied ecosystems and provide quantitative information about the canopy phenology. The PhenoCam Network coordinates the camera installation and data reporting/analyses across sites in the Americas, providing automated, near-surface remote sensing of canopy phenology across a range of ecosystems and climate zones. Use of PhenoCam images / data should follow the PhenoCam Data Use Policy .
No PhenoCam data for this siteGeoNEX Data Products
GeoNEX led by NASA Earth eXchange (NEX) is a collaborative effort for generating Earth monitoring products from the new generation of geostationary satellite sensors. GeoNEX has produced a suite of geostationary data products including surface reflectance, land surface temperature, surface solar radiation, and many others.
The GeoNEX Common Grid locates GeoNEX data in the geographic (latitude/longitude) projection. Pixels (grid cells) are created at regular 0.005°, 0.01°, and 0.02° resolutions.
GeoNEX pixels below cover the area 0.06° x 0.06° around and including site US-SJ2, 33.6596, -117.855.
Click a square in the grid at left to display its data below.
Coordinates for selected GeoNEX Pixel
Graph controls:
- Zoom: click-drag
- Pan: shift-click-drag
- Restore zoom level: double-click
- Use the slider below the time series to zoom in and out.
All download requests will be logged.
NDVI: Normalized Difference Vegetation Index
Resolution: 0.01° x 0.01° & 10 minutes
Coordinates for pixel:
NIRv Near-Infrared Reflectance of vegetation
Resolution: 0.01° x 0.01° & 10 minutes
Coordinates for pixel:
DSR: Surface downward shortwave radiation
Resolution: 0.01° x 0.01° & Hourly
Coordinates for pixel:
LST: Land Surface Temperature
Resolution: 0.02° x 0.02° & Hourly
Coordinates for pixel:
Citation
This material can be used without obtaining permission from NASA. NASA should be acknowledged as the source of this material.
Subset Data Citation:
- Hashimoto, H., Wang, W., Park, T., Khajehei, S., Ichii, K., Michaelis, A.R., Guzman, A., Nemani, R.R., Torn, M., Yi, K., Brosnan, I.G. (in preparation). Subsets of geostationary satellite data over international observing network sites for studying the diurnal dynamics of energy, carbon, and water cycles.
Relevant Science Publication Citation:
GeoNEX Surface Reflectance for Vegetation Indices (NDVI & NIRv)- Wang, W., Wang, Y., Lyapustin, A., Hashimoto, H., Park, T., Michaelis, A., & Nemani, R. (2022). A novel atmospheric correction algorithm to exploit the diurnal variability in hypertemporal geostationary observations. Remote Sensing, 14(4), 964.
- Li, R., Wang, D., Wang, W., & Nemani, R. (2023). A GeoNEX-based high-spatiotemporal-resolution product of land surface downward shortwave radiation and photosynthetically active radiation. Earth System Science Data, 15(3), 1419-1436.
- Jia, A., Liang, S., & Wang, D. (2022). Generating a 2-km, all-sky, hourly land surface temperature product from Advanced Baseline Imager data. Remote Sensing of Environment, 278, 113105.
US-SJ2: San Joaquin (Freshwater Marsh Tower 2)
- Overview
- Windroses
- Data Citation
- Data Use Log
- Image Gallery
- Remote Sensing Data
- MODIS
- PhenoCam
- GeoNEX
- Publications
- BADM
| AmeriFlux Publications | Add Publication |
US-SJ2: San Joaquin (Freshwater Marsh Tower 2)
- Overview
- Windroses
- Data Citation
- Data Use Log
- Image Gallery
- Remote Sensing Data
- MODIS
- PhenoCam
- GeoNEX
- Publications
- BADM
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 site’s vegetation and soil, describing disturbance history, and defining instrumentation for flux processing. They complement the flux/met data.
- Download BADM for this site*
- View Site General Info for this site (Overview tab)*
- Use Online Editor to update Site General Info or DOI Authorship
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* Online updates are shown on the Overview tab real time. However, downloaded BADM files will not reflect those updates until they have been reviewed for QA/QC.
US-SJ2: San Joaquin (Freshwater Marsh Tower 2)
- Overview
- Windroses
- Data Citation
- Data Use Log
- Image Gallery
- Remote Sensing Data
- MODIS
- PhenoCam
- GeoNEX
- Publications
- BADM