AmeriFlux Logo
Quick Sites: Sign in to Use
  1. Home
  2. Sites
  3. Siteinfo
  4. US-NR4

US-NR4: Niwot Ridge Alpine (T-Van East)

Tower_team:
PI: John Knowles [email protected] - USDA ARS Southwest Watershed Research Center
AncContact: Sarah Elmendorf [email protected] - University of Colorado Boulder
FluxContact: Peter Blanken [email protected] - University of Colorado Boulder
Lat, Long: 40.052003, -105.585853
Elevation(m): 3502
Network Affiliations: AmeriFlux
Vegetation IGBP: GRA (Grasslands: Lands with herbaceous types of cover. Tree and shrub cover is less than 10%. Permanent wetlands lands with a permanent mixture of water and herbaceous or woody vegetation. The vegetation can be present in either salt, brackish, or fresh water.)
Climate Koeppen: ET (Tundra)
Mean Annual Temp (°C): -2.2
Mean Annual Precip. (mm): 884
Flux Species Measured: CO2, H2O
Years Data Collected: 2007 - Present
Years Data Available:No data available
Description: Snow-scoured alpine tundra; Fellfield vegetation; 3-m tower located 50 m E of US-NR3, 387 m SW of US-xNW, and 28 km west of Boulder, CO, USA.
URL: —
Research Topics: Sublimation; Carbon cycle; Water balance; Ecosystem function in complex mountain terrain
Acknowledgment: Funding was provided by National Science Foundation DEB awards 0423662, 1027341, and 1637686 to the Niwot Ridge LTER.
Site Photo More Site Images
Image Credit: John Knowles, 07/27/2008
Copyright preference: As long as credit is given
Site Publication More Site Publications
Knowles, J. F., Blanken, P. D., Williams, M. W., Chowanski, K. M. 2012. Energy And Surface Moisture Seasonally Limit Evaporation And Sublimation From Snow-Free Alpine Tundra, Agricultural And Forest Meteorology, 157, 106-115.

US-NR4: Niwot Ridge Alpine (T-Van East)

DOIs for this site and other citation information

Citations: For data, use the DOI citation. For site characterization, use the site publication. For funding, use acknowledgments.

DOIs to use for Citation of Data

  • AmeriFlux
  • Citation: No DOI information available.
  • Link:

Publication(s) to use for citations of site characterization

    —

Acknowledgements

  • Funding was provided by National Science Foundation DEB awards 0423662, 1027341, and 1637686 to the Niwot Ridge LTER.

Resources

US-NR4: Niwot Ridge Alpine (T-Van East)

This page displays the list of downloads of data for the site {{siteId}}.

NOTE: Version refers to the version of the AmeriFlux BASE-BADM product for the site was downloaded by the user and the download count indicates the number of times the person downloaded that version.

Year Range
 Showing {{startItem + 1}} to {{(startItem + items) > filtered.length ? filtered.length : (startItem + items)}} of {{filtered.length}} results
Products
Site Team View

Items Per Page:  
Date Email Name Version Intended Use Intended Use Description Download Count
{{dlObject.timeStamp}} {{dlObject.email}} {{dlObject.displayName}} {{dlObject.version}} {{dlObject.intendedUse}} {{dlObject.comment}} {{dlObject.downloadCounter}}
No results to display
Date Name Product Version Intended Use Intended Use Description Download Count
{{dlObject.timeStamp}} {{dlObject.displayName}} {{dlObject.dataProduct}} {{dlObject.version}} {{dlObject.intendedUse}} {{dlObject.comment}} {{dlObject.downloadCounter}}
No results to display

 Showing {{startItem + 1}} to {{(startItem + items) > filtered.length ? filtered.length : (startItem + items)}} of {{filtered.length}} results

Items Per Page:  

Not Found

Uh Oh. Something is missing. Try double checking the URL and try again.

US-NR4: Niwot Ridge Alpine (T-Van East)

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.

Includes all pixels that have acceptable quality

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

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.

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-NR4: Niwot Ridge Alpine (T-Van East)

Year Publication
2015 Knowles, J. F., Harpold, A. A., Cowie, R., Zeliff, M., Barnard, H. R., Burns, S. P., Blanken, P. D., Morse, J. F., Williams, M. W. (2015) The Relative Contributions Of Alpine And Subalpine Ecosystems To The Water Balance Of A Mountainous, Headwater Catchment, Hydrological Processes, 29(22), 4794-4808.
2015 Knowles, J. F., Blanken, P. D., Williams, M. W. (2015) Soil Respiration Variability Across A Soil Moisture And Vegetation Community Gradient Within A Snow-Scoured Alpine Meadow, Biogeochemistry, 125(2), 185-202.
2016 Knowles, J. F., Blanken, P. D., Williams, M. W. (2016) Wet Meadow Ecosystems Contribute The Majority Of Overwinter Soil Respiration From Snow-Scoured Alpine Tundra, Journal Of Geophysical Research: Biogeosciences, 121(4), 1118-1130.
2017 Wieder, W. R., Knowles, J. F., Blanken, P. D., Swenson, S. C., Suding, K. N. (2017) Ecosystem Function In Complex Mountain Terrain: Combining Models And Long-Term Observations To Advance Process-Based Understanding, Journal Of Geophysical Research: Biogeosciences, 122(4), 825-845.
2018 Sexstone, G. A., Clow, D. W., Fassnacht, S. R., Liston, G. E., Hiemstra, C. A., Knowles, J. F., Penn, C. A. (2018) Snow Sublimation In Mountain Environments And Its Sensitivity To Forest Disturbance And Climate Warming, Water Resources Research, 54(2), 1191-1211.
2019 Knowles, J. F., Blanken, P. D., Lawrence, C. R., Williams, M. W. (2019) Evidence For Non-Steady-State Carbon Emissions From Snow-Scoured Alpine Tundra, Nature Communications, 10(1), .
2012 Knowles, J. F., Blanken, P. D., Williams, M. W., Chowanski, K. M. (2012) Energy And Surface Moisture Seasonally Limit Evaporation And Sublimation From Snow-Free Alpine Tundra, Agricultural And Forest Meteorology, 157, 106-115.
2009 Blanken, P. D., Williams, M. W., Burns, S. P., Monson, R. K., Knowles, J. F., Chowanski, K., Ackerman, T. (2009) A Comparison Of Water And Carbon Dioxide Exchange At A Windy Alpine Tundra And Subalpine Forest Site Near Niwot Ridge, Colorado, Biogeochemistry, 95(1), 61-76.
2015 Knowles, J. F., Burns, S. P., Blanken, P. D., Monson, R. K. (2015) Fluxes Of Energy, Water, And Carbon Dioxide From Mountain Ecosystems At Niwot Ridge, Colorado, Plant Ecology & Diversity, 8(5-6), 663-676.

US-NR4: Niwot Ridge Alpine (T-Van East)

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.

* 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-NR4: Niwot Ridge Alpine (T-Van East)

No wind rose data is available at this time.