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DOI(s) for citing US-NR2 data

Data Use Policy: AmeriFlux Legacy Policy

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Publication(s) for citing site characterization

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Acknowledgments

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Resources

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Search Images for this Site Images found : 4

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USGS Tower
**Description:**
33m USGS (West) Tower. At top are eddy covariance instruments (CSAT, CO2 intake tube, krypton hygrometer) on the left (pointing south), Q*7 REBS net radiometer (long arm, center, left), quantum & pyranometer (center, ontop of white plate), Wind Sentry cup & vane (right)
Keywords: eddy covariance, net radiometer, pyranometer, quantum sensor, cups, vane
**Site ID:** US-NR2
**Location:** Colorado, United States
**Image Date:** 2014/04/09
**Journal:** —
**Article Title:** —
**Copyright Permissions:** —
**Right to Use:** Open use

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Horizontal and Vertical Profile Sampling System (USGS)
**Description:**
22 inlet sampling system with 2 liter mixing jars and flow meters (top) and Picarro CRDS (bottom shelf) used to measure mean CO2 and CH4 concentrations from 4 towers
Keywords: CO2 CH4 concentration profile, horizontal advection, vertical advection
**Site ID:** US-NR2
**Location:** Colorado, United States
**Image Date:** 2014/11/09
**Journal:** —
**Article Title:** —
**Copyright Permissions:** —
**Right to Use:** Open use

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CSAT3 Anemometer at 33m West (USGS) tower
**Description:**
CSAT an air inlet tube(funnel) at West (USGS) Tower, 33m ht., view to south (in use 2000-2016)
Keywords: —
**Site ID:** US-NR2
**Location:** Colorado, United States
**Image Date:** 2015/08/16
**Journal:** —
**Article Title:** —
**Copyright Permissions:** —
**Right to Use:** Open use

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Eddy Covariance Equip at 33m West (USGS) Tower
**Description:**
CSAT, Li7500, Krypton hygrometer at West (USGS) Tower, 33m ht., view to south (in use 2014-2016)
Keywords: —
**Site ID:** US-NR2
**Location:** United States
**Image Date:** 2015/08/15
**Journal:** —
**Article Title:** —
**Copyright Permissions:** —
**Right to Use:** Open use

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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

Read more on how to cite these MODIS products. Data come from NASA’s MODIS instruments installed on satellites Terra and Aqua, which scan the entire Earth’s surface every one to two days.

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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 .

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GeoNEX Data Products

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.

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.

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NDVI: Normalized Difference Vegetation Index

Resolution: 0.01° x 0.01° & 10 minutes

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NIRv Near-Infrared Reflectance of vegetation

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DSR: Surface downward shortwave radiation

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LST: Land Surface Temperature

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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.

Search Publications for this Site Publications Found: 1

AmeriFlux Publications

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Year	Publication
2009	Burns, S. P., Delany, A. C., Sun, J., Stephens, B. B., Oncley, S. P., Maclean, G. D., Semmer, S. R., Schröter, J., Ruppert, J. (2009) An Evaluation Of Calibration Techniques For In Situ Carbon Dioxide Measurements Using A Programmable Portable Trace-Gas Measuring System, Journal Of Atmospheric And Oceanic Technology, 26(2), 291-316. https://doi.org/10.1175/2008JTECHA1080.1

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.

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Tower_team:
PI:	Dean Anderson deander@usgs.gov - U.S. Geological Survey
DataManager:	George Griffin ggriffin@usgs.gov - U.S. Geological Survey
Lat, Long:	40.0325, -105.5469
Elevation(m):	3030
Network Affiliations:	AmeriFlux
Vegetation IGBP:	ENF (Evergreen Needleleaf Forests: Lands dominated by woody vegetation with a percent cover >60% and height exceeding 2 meters. Almost all trees remain green all year. Canopy is never without green foliage.)
Climate Koeppen:	Dfc (Subarctic: severe winter, no dry season, cool summer)
Mean Annual Temp (°C):	0.43
Mean Annual Precip. (mm):	595.37
Flux Species Measured:	CO2, H, H2O, CH4
Years Data Collected:	2000 - 2016
Years Data Available:	No data available
Data Use Policy:	AmeriFlux Legacy Policy
Description:	The Niwot Ridge site is located in a subalpine, temperate coniferous forest on land owned by the U.S. Forest Service.
URL:	http://www.mmm.ucar.edu/science/abl/forest/
Research Topics:	Horizontal and vertical advection of CO2 and CH4.
Acknowledgment:	—

US-NR2: Niwot Ridge Forest (USGS site)

US-NR2: Niwot Ridge Forest (USGS site)

DOI(s) for citing US-NR2 data

Publication(s) for citing site characterization

Acknowledgments

Resources

US-NR2: Niwot Ridge Forest (USGS site)

Not Found

US-NR2: Niwot Ridge Forest (USGS site)

USGS Tower

Horizontal and Vertical Profile Sampling System (USGS)

CSAT3 Anemometer at 33m West (USGS) tower

Eddy Covariance Equip at 33m West (USGS) Tower

US-NR2: Niwot Ridge Forest (USGS site)

US-NR2: Niwot Ridge Forest (USGS site)

BADM for This Site

US-NR2: Niwot Ridge Forest (USGS site)

No wind rose data is available at this time.