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Tower_team:
PI: Shashi Verma sverma@unlnotes.unl.edu - University of Nebraska - Lincoln
ANCCONTACT: Todd Schimelfenig TSchimelfenig1@unl.edu -
Lat, Long: 36.7666700, -97.1333300
Elevation(m): 310
Network Affiliations: AmeriFlux
Vegetation IGBP: CRO (Croplands)
Climate Koeppen: Cfa (Humid Subtropical: mild with no dry season, hot summer)
Mean Annual Temp (°C): 14.94
Mean Annual Precip. (mm): 866.34
Flux Species Measured: CO2
Years Data Collected: AmeriFlux: 1997 - 2001
Description:
The Ponca Winter Wheat site is a 65 ha rainfed wheat field in north central Oklahoma. Planting of winter wheat takes place annually in mid-fall. By late ...
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Research Topics:
The research and science objectives of the Ponca Winter Wheat site are as follows: 1) Examine the differences, similarities, and environmental controls ...
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Acknowledgment:
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Site Publication More Site Publications

AmeriFlux user: This tab is under development. Below are new values we’re thinking of offering. Please send your feedback and requests to the AmeriFlux Data Team at ameriflux-support@lbl.gov.


Derived Quantities

  • LAI (cm2/g)
  • Canopy Height (m)
  • Photosynthesis
  • GPP
  • Latent Heat Exchange
  • Net Ecosystem Exchange
  • PPFD (Visible Light)
  • Precipitation (mm)
  • Ecosystem Respiration
  • Solar Radiation (Rg)
  • Rn (Net Radiation) W/m2
  • Air Temp (°C)
  • Vapor Pressure Deficit
  • Veg Properties
  • Plant Functional Type
  • Disturbance History

  • Instruments, Rel to Ref Pt

  • Elevation (m)
  • r, Θ (m, rad)

  • Soils Template

  • Soil Texture
  • Bulk Density (g/cm3)
  • Soil Carbon Stock and/or Density (tons/cm)
  • Approximate Area: 765.25 m2

    Instructions for DOIs for This Site

    When using DOIs for this site, use the publications and acknowledgments listed below.

    DOIs

    Publications to use for Citations for this Site

    Acknowledgements

    Resources

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

    Year Range
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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
    2017 Lu, Y., Williams, I. N., Bagley, J. E., Torn, M. S., Kueppers, L. M. (2017) Representing Winter Wheat In The Community Land Model (Version 4.5), Geoscientific Model Development, 10(5), 1873-1888.
    2002 Hanan, N. P., Burba, G., Verma, S. B., Berry, J. A., Suyker, A., Walter-Shea, E. A. (2002) Inversion Of Net Ecosystem CO2 Flux Measurements For Estimation Of Canopy PAR Absorption, Global Change Biology, 8(6), 563-574.
    2005 Hanan, N. P., Berry, J. A., Verma, S. B., Walter-Shea, E. A., Suyker, A. E., Burba, G. G., Denning, A. S. (2005) Testing A Model Of CO2, Water And Energy Exchange In Great Plains Tallgrass Prairie And Wheat Ecosystems, Agricultural And Forest Meteorology, 131(3-4), 162-179.

    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.