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US-EML: Eight Mile Lake Permafrost thaw gradient, Healy Alaska.

Tower_team:
PI: Ted Schuur ted.Schuur@nau.edu - University of Northern Arizona
FluxContact: Rosvel Bracho rbracho@ufl.edu - University of Florida
DataManager: Gerardo Celis Gerardo.Celis@nau.edu - University of Northern Arizona
Lat, Long: 63.8784, -149.2536
Elevation(m): 700
Network Affiliations: AmeriFlux, LTER
Vegetation IGBP: OSH (Open Shrublands: Lands with woody vegetation less than 2 meters tall and with shrub canopy cover between 10-60%. The shrub foliage can be either evergreen or deciduous.)
Climate Koeppen: ET (Tundra)
Mean Annual Temp (°C): -1
Mean Annual Precip. (mm): 378
Flux Species Measured: CO2, H, H2O, CH4
Years Data Collected: AmeriFlux: 2008 - Present
Description: Tundra permafrost degrading
URL: http://www.biology.ufl.edu/ecosystemdynamics/research.html
Research Topics: CO2, CH4, H20 and heat fluxes fluxes in a permafrost thaw gradient
Acknowledgment: —
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US-EML: Eight Mile Lake Permafrost thaw gradient, Healy Alaska.

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US-EML: Eight Mile Lake Permafrost thaw gradient, Healy Alaska.

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US-EML: Eight Mile Lake Permafrost thaw gradient, Healy Alaska.

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-EML: Eight Mile Lake Permafrost thaw gradient, Healy Alaska.

Year Publication
2012 Ruehr, N. K., Martin, J. G., Law, B. E. (2012) Effects Of Water Availability On Carbon And Water Exchange In A Young Ponderosa Pine Forest: Above- And Belowground Responses, Agricultural And Forest Meteorology, 164, 136-148.
2017 Euskirchen, E. S., Bret-Harte, M. S., Shaver, G. R., Edgar, C. W., Romanovsky, V. E. (2017) Long-Term Release Of Carbon Dioxide From Arctic Tundra Ecosystems In Alaska, Ecosystems, 20(5), 960-974.
2012 Belshe, E. F., Schuur, E. A., Bolker, B. M., Bracho, R. (2012) Incorporating Spatial Heterogeneity Created By Permafrost Thaw Into A Landscape Carbon Estimate, Journal Of Geophysical Research: Biogeosciences, 117(G1), n/a-n/a.
2010 Lee, H., Schuur, E. A. G., Vogel, J. G. (2010) Soil CO2 Production In Upland Tundra Where Permafrost Is Thawing, Journal Of Geophysical Research: Biogeosciences, 115(G1), n/a-n/a.
2012 Trucco, C., Schuur, E. A., Natali, S. M., Belshe, E. F., Bracho, R., Vogel, J. (2012) Seven-Year Trends Of CO2 Exchange In A Tundra Ecosystem Affected By Long-Term Permafrost Thaw, Journal Of Geophysical Research: Biogeosciences, 117(G2), n/a-n/a.
2013 Hicks Pries, C. E., Schuur, E. A., Vogel, J. G., Natali, S. M. (2013) Moisture Drives Surface Decomposition In Thawing Tundra, Journal Of Geophysical Research: Biogeosciences, 118(3), 1133-1143.
2013 Belshe, E. F., Schuur, E. A., Grosse, G. (2013) Quantification Of Upland Thermokarst Features With High Resolution Remote Sensing, Environmental Research Letters, 8(3), n/a-n/a.
2013 Hicks Pries, C. E., Schuur, E. A., Crummer, K. G. (2013) Thawing Permafrost Increases Old Soil And Autotrophic Respiration In Tundra: Partitioning Ecosystem Respiration Using δ13C And ∆14C, Global Change Biology, 19(2), 649-661.
2009 Vogel, J., Schuur, E. A. G., Trucco, C., Lee, H. (2009) Response Of CO2 Exchange In A Tussock Tundra Ecosystem To Permafrost Thaw And Thermokarst Development, Journal Of Geophysical Research: Biogeosciences, 114(G4), n/a-n/a.
2009 Schuur, E. A., Vogel, J. G., Crummer, K. G., Lee, H., Sickman, J. O., Osterkamp, T. E. (2009) The Effect Of Permafrost Thaw On Old Carbon Release And Net Carbon Exchange From Tundra, Nature, 459(7246), 556-559.
2007 Schuur, E. A., Crummer, K. G., Vogel, J. G., Mack, M. C. (2007) Plant Species Composition And Productivity Following Permafrost Thaw And Thermokarst In Alaskan Tundra, Ecosystems, 10(2), 280-292.
2012 Pries, C. E. H., Schuur, E. A., Crummer, K. G. (2012) Holocene Carbon Stocks And Carbon Accumulation Rates Altered In Soils Undergoing Permafrost Thaw, Ecosystems, 15(1), 162-173.

US-EML: Eight Mile Lake Permafrost thaw gradient, Healy Alaska.

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-EML: Eight Mile Lake Permafrost thaw gradient, Healy Alaska.

Wind Roses

Click an image below to enlarge it, or use the navigation panel.
  • Image scale: 447m x 447m
  • 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
    A 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