Imnavait Creek spring activities -2013


An unusually late, cold spring has delayed snow melt in northern Alaska.  Our site visit this year included re-installing the methane sensor, calibrating and repairing analyzers and communications equipment, all in winter-like conditions despite it being late May.  This will be the second summer of continuous CH4 flux measurement at the Fen moist-acidic tundra site.  The instrument was set up well ahead of the melt, so we hope to get some exciting data.  Our webcams are all online now, and images are still being harvested by the PhenoCam network.

May 23, 2013 Imnavait Cr:


May 23, 2013 Imnavait Cr:

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Webcam image archives now available


See our data access page to download archived webcam images from past years.   Currently, these are rather large files for an entire calendar year.  Contact us if you would like a specific date range or have trouble downloading the archives.

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AON data presented at NACP/AmeriFlux meetings


Dr. Eugenie Euskirchen is presenting CO2 and CH4 data summaries from the Imnavait Creek sites at the 2013 AmeriFlux/NACP meetings in Albuquerque, New Mexico.  Her poster is available on our Presentations page, under the Publications menu.

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Phenology Webcams join PhenoCam Network


Images from our four webcams at Imnavait Creek join the PhenoCam network.  This is an effort to improve understanding of vegetation phenology via a network of canopy cameras.  Images from our phenology webcams begin in June 2012 and can now be found in the 'Affiliated sites' section of the PhenoCam website:

Examples from the Ridge Phenocam, including some caribou passing through:


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Collaborative study from Imnavait Creek flux sites published


Research examining seasonal and spatial variation in plot-level CO2 fluxes at our flux tower sites will be published in the Journal of Geophysical Research.  Lead author and AON collaborator Dr. Anja Kade classified tundra vegetation types within the 3 flux tower footprints and then measured chamber-level CO2 fluxes in dominant vegetation types during both the growing season and winter months.   Scaling net ecosystem exchange rate of CO2 from plot-level to tower-level produced generally good agreeement between methods during summer, but not during wintertime.  
Read the abstract or download the pdf from our bibiliography page.

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Phenology webcams established


Additional webcam images can now be viewed on this site, click the 'Webcam Gallery' menu item.  We hope to create downloadable archives of images in the future.  In the meantime, please use the 'contact us' link at right to obtain past image files.

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Site visit to Pleistocene Park Russia planned


The project technician will be traveling to Cherskiy in September to assist our Russian colleagues with maintainance, calibration and some repairs to the 35 m eddy tower at Pleistocene Park.   Some damage occurred over the winter and during heavy flooding this spring.  Main items to replace are power supplies, net radiometer and the tower data and power cables.  We will add a second set of flux instruments at a lower height on the tower which will serve to better measure the vertical CO2 gradient and help resolve spatial resolution of the flux data.

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New instruments added to Imnavait Creek


In June 2012, we will be improving our research sites at Imnavait Cr with the addition of several sensors and webcams:

  • We will install an open path, fast-response methane analyzer at the Fen site.  This instrument will measure methane fluxes from the wet sedge tundra ecosystem at this site during the summer months and shoulder seasons.  This information can be combined with our existing CO2 monitoring and with streamflow carbon data to construct a comprehensive carbon budget for the Imnavait basin.
  • We will be testing a new hybrid closed path CO2/H2O analyzer at the Ridge site.  If the cold weather performance of this system is good, we anticipate better data coverage during the winter since the optical path is enclosed thereby avoiding ice and snow accumulation.
  • In order to record seasonal changes and create a visual record of plant phenology, we are installing webcams at each of the three Inmavait Cr sites.  The cameras will be mounted at ~3m, aimed downward at the vegetation with about 20% horizon, and capture several images per day.  Our existing Ridge webcam images, as well as those at nearby Toolik Field Station, have been used to monitor snow cover, animal migration, weather conditions for field work and aviation and for troubleshooting tower instruments.  The new images will be available on this website and also as part of the PhenoCam network.

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Welcome to the new AON website


We hope you will enjoy our new website.  Please click around and learn about our research and the people and organizations that make it possible.  If you have any problems or wish to comment, please contact the webmaster.  Thank you!


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First round of upgrades planned at Imnavait Cr


As the first step in upgrading the Tussock station to year-round operation with satellite data/communciations support, we will begin placing equipment at the site in March. A temporary expansion of the renewable energy and communication systems will precede the full upgrade this summer. We also hope to test new analyzers purchased as part of our newly funded research efforts.

Moxa wireless client access point

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