US-SJ1: San Joaquin (Freshwater Marsh Tower 1)

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US-SJ1: San Joaquin (Freshwater Marsh Tower 1)

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US-SJ1: San Joaquin (Freshwater Marsh Tower 1)

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US-SJ1: San Joaquin (Freshwater Marsh Tower 1)

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MODIS NDVI

The time series shows the 16-day Normalized Difference Vegetation Index (NDVI) average from the MOD13Q1 data product.
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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

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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 .

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Beta: This AmeriFlux GeoNEX Products feature is in beta. If you spot any issues, please help us out by emailing geonex-feedback@lbl.gov with a description and/or screenshot of the issue. Thanks in advance!

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.

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NDVI: Normalized Difference Vegetation Index

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NIRv Near-Infrared Reflectance of vegetation

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DSR: Surface downward shortwave radiation

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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.

GeoNEX Surface Downward Solar Radiation (DSR):

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.

GeoNEX Land Surface Temperature (LST):

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-SJ1: San Joaquin (Freshwater Marsh Tower 1)

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BADM for This Site

Access the Biological, Ancillary, Disturbance and Metadata (BADM) information and data for this site.

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US-SJ1: San Joaquin (Freshwater Marsh Tower 1)

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Tower_team:
PI:	Mike Goulden mgoulden@uci.edu - University of California - Irvine
Lat, Long:	33.6623, -117.8514
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:	1999 - 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 1 is located near the central-eastern edge of the 1000 by 300 m marsh. placing it on the far 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 More Show 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 More Show Less
Acknowledgment:	—

US-SJ1: San Joaquin (Freshwater Marsh Tower 1)

US-SJ1: San Joaquin (Freshwater Marsh Tower 1)

DOI(s) for citing US-SJ1 data

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Acknowledgments

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US-SJ1: San Joaquin (Freshwater Marsh Tower 1)

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US-SJ1: San Joaquin (Freshwater Marsh Tower 1)

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US-SJ1: San Joaquin (Freshwater Marsh Tower 1)

US-SJ1: San Joaquin (Freshwater Marsh Tower 1)

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US-SJ1: San Joaquin (Freshwater Marsh Tower 1)

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