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Tower_team:
PI: Walt Oechel woechel@mail.sdsu.edu - San Diego State University
Lat, Long: 70.2814700, -148.8848300
Elevation(m): 5
Network Affiliations: AmeriFlux
Vegetation IGBP: WET (Permanent Wetlands)
Climate Koeppen: Dsc (Dry Continental: cool summer)
Mean Annual Temp (°C): -13.57
Mean Annual Precip. (mm): 123.68
Flux Species Measured: CO2
Years Data Collected: AmeriFlux: 1993 - 1994
Description: Arctic tundra:tossock tundra
URL: http://gcrg.sdsu.edu
Research Topics: NSF, Arctic System Science (ARCSS), Land Atmosphere Ice Interactions (LAII), Flux Study "Large Area Estimates of Carbon Fluxes in Arctic Landscapes"
Acknowledgment:
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When using DOIs for this site, use the publications and acknowledgments listed below.

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Publications to use for Citations for this Site

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Resources

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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. The download count indicates the number of times the person downloaded the data.

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MODIS NDVI

Normalized Difference Vegetation Index image for this site.

For time series, data download and other MODIS products for this site, visit MODIS cutouts.

Citation

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Citation:

ORNL DAAC. 2008. MODIS Collection 5 Fixed Sites Subsetting and Visualization Tool. ORNL DAAC, Oak Ridge, Tennessee, USA. http://dx.doi.org/10.3334/ORNLDAAC/1251

Read more on how to cite these MODIS images. 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.

Year Publication
1998 Oechel, W. C., Vourlitis, G. L., Brooks, S., Crawford, T. L., Dumas, E. (1998) Intercomparison Among Chamber, Tower, And Aircraft Net CO2 And Energy Fluxes Measured During The Arctic System Science Land-Atmosphere-Ice Interactions (ARCSS-LAII) Flux Study, Journal Of Geophysical Research: Atmospheres, 103(D22), 28993-29003.
2003 Vourlitis, G. L., Verfaillie, J., Oechel, W. C., Hope, A., Stow, D., Engstrom, R. (2003) Spatial Variation In Regional CO2 Exchange For The Kuparuk River Basin, Alaska Over The Summer Growing Season, Global Change Biology, 9(6), 930-941.
2000 Vourlitis, G. L., Oechel, W. C., Hope, A., Stow, D., Boynton, B., Verfaillie, J., Zulueta, R., Hastings, S. J. (2000) Physiological Models For Scaling Plot Measurements Of CO2 Flux Across An Arctic Tundra Landscape, Ecological Applications, 10(1), 60-72.
2000 Eugster, W., Rouse, W. R., Pielke Sr, R. A., Mcfadden, J. P., Baldocchi, D. D., Kittel, T. G., Chapin, F. S., Liston, G. E., Vidale, P. L., Vaganov, E., Chambers, S. (2000) Land-Atmosphere Energy Exchange In Arctic Tundra And Boreal Forest: Available Data And Feedbacks To Climate, Global Change Biology, 6(S1), 84-115.
2000 Chapin, F. S., Eugster, W., McFadden, J. P., Lynch, A. H., Walker, D. A. (2000) Summer Differences Among Arctic Ecosystems In Regional Climate Forcing, Journal Of Climate, 13(12), 2002-2010.
1997 Oechel, W. C., Vourlitis, G., Hastings, S. J. (1997) Cold Season CO2 Emission From Arctic Soils, Global Biogeochemical Cycles, 11(2), 163-172.
2000 Williams, M., Eugster, W., Rastetter, E. B., Mcfadden, J. P., Chapin, F. S. (2000) The Controls On Net Ecosystem Productivity Along An Arctic Transect: A Model Comparison With Flux Measurements, Global Change Biology, 6(S1), 116-126.
1997 Vourlitis, G. L., Oechel, W. C. (1997) Landscape-Scale CO2 , H2O Vapour And Energy Flux Of Moist-Wet Coastal Tundra Ecosystems Over Two Growing Seasons, The Journal Of Ecology, 85(5), 575-590.
1999 Fahnestock, J. T., Jones, M. H., Welker, J. M. (1999) Wintertime CO2 Efflux From Arctic Soils: Implications For Annual Carbon Budgets, Global Biogeochemical Cycles, 13(3), 775-779.

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.

Wind Roses

Click an image below to enlarge it, or use the navigation panel.
  • Image scale: 342m x 342m
  • Data Collected:
  • Wind roses use variables ‘WS’ and ‘WD’.
    Download Data Download Wind Rose as Image File (PNG)

    Wind Speed (m/s)

  • Graph Type
  • Wind Speed Scale
  • Wind Direction Scale (%)
  • Show Satellite Image
  • Show Wind Rose
  • Annual Average
    About Ameriflux Wind Roses
    Wind Rose Explanation
    wind rose gives a succinct view of how wind speed and direction are typically distributed at a particular location. Presented in a circular format, a wind rose shows the frequency and intensity of winds blowing from particular directions. The length of each “spoke” around the circle indicates the amount of time (frequency) that the wind blows from a particular direction. Colors along the spokes indicate categories of wind speed (intensity). Each concentric circle represents a different frequency, emanating from zero at the center to increasing frequencies at the outer circles
    Utility
    This information can be useful to gain insight into regions surrounding a flux tower that contribute to the measured fluxes, and how those regions change in dependence of the time of day and season. The wind roses presented here are for four periods of the year, and in 16 cardinal directions. Graphics are available for all sites in the AmeriFlux network based on reported wind measurements at each site.
    Data from each site can be downloaded by clicking the ‘download’ button.
    Hover the cursor over a wind rose to obtain directions, speeds and intensities.
    Note that wind roses are not equivalent to flux footprints. Specifically, the term flux footprint describes an upwind area “seen” by the instruments measuring vertical turbulent fluxes, such that heat, water, gas and momentum transport generated in this area is registered by the instruments. Wind roses, on the other hand, identify only the direction and speed of wind.
    Where do these data come from?
    The wind roses are based on observed hourly data from the sites registered with the AmeriFlux Network.
    Parameters for AmeriFlux Wind Roses
    To use wind roses for a single AmeriFlux site, the following parameters may be most useful:
    • Wind Speed Scale: Per Site
    • Wind Direction Scale (%): Per Site
    To compare wind roses from more than one single AmeriFlux site, the following parameters may be most useful:
    • Wind Speed Scale: Non-Linear
    • Wind Direction Scale (%): AmeriFlux
    Mar - Jun; 6am - 6pm
    Mar - Jun; 6pm - 6am
    Jun - Sep; 6am - 6pm
    Jun - Sep; 6pm - 6am
    Sep - Dec; 6am - 6pm
    Sep - Dec; 6pm - 6am
    Dec - Mar; 6am - 6pm
    Dec - Mar; 6pm - 6am