News

2017 Imnavait Cr data now available

May
25
Due to communication issues, we lacked new data until this month (May). 2017 data from January to May are now processed and available for download. Partitioned GPP and ER values have not yet been calculated, will appear on the next round of processing. Since communications are restored, we'll be posting data updates more regularly over the summer.
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Newest AON publication available

Nov
28

We are pleased to announce the publication of our latest paper in Ecosystems, please see our Bibliography here.

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Fall 2016 Data and Website Update

Sep
15
Updated Imnavait data is now available, processed up to Nov 2016. In May, we replaced all the Licors at Imnavait with closed path LI-7200 units. We are still running an open path methane analyzer at Wet Sedge site. Please contact us with any questions. Cherskiy data is available up to August 2016, when the system was disconnected. Unfortunately, this will be the end of the Russia site data collection for now. We hope that funding will become available to reinstate the project. The webcam galleries have been replaced, so that the most recent 24 hours is available. Please contact us if you wish to have access to older images. Or simply visit the Phenocam website and search for imcr--- sites. Click 'browse images' for historical data. https://phenocam.sr.unh.edu/webcam/gallery/
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Website back up

Jul
15
Following a server crash and some delay, the AON website is back up. Please let us know if you experience any glitches. Feedback is always welcome. Thanks for your patience and interest in our research!
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2016 Data now available

Apr
19
2016 data are now posted (Jan-Mar) for Imnavait sites. Please refer to the metadata files to understand changes, or as always, feel free to contact us with questions. Thanks!
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2015 final data sets available

Feb
03
For Imnavait Cr sites, our final version 2015 data is now available for download via the data access tab. The IC_1993 Tussock site is missing flux data until mid-April due to technical difficulties. Please contact us with any questions, and thanks for your interest in our research.
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2015 data now available

May
15

After some delay this year there are now data posted from Imnavait Cr.  The Tussock site has fluxes beginning in April due to technical difficulties.  We are working to add the Jan-Apr period from that site at some point in the summer.

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Site visit report - Cherskiy 2014

Sep
18

In August we visited our sites in Cherskiy Russia again for annual maintenance and site characterization surveys.  We calibrated the CO2/H2O IRGAs and made some small repairs and adjustments to the other sensors.  The CO2 height profile system was improved by adding thermistors at each intake height, and the automatic calibration gas injector was fixed.  Vegetation in the tower footprint was compared against a rough map, delineating land cover and rough funtional type.  The tall tower footprint is quite large at ~1500m radius from tower.  We improved the map and made thaw depth measurements.  A publication of our findings from the Russian site is in the works, stay tuned!

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Site visit report - Cherskiy 2013

Oct
07

Repairs, calibrations and upgrades were made during late August at the Pleistocene Park tall tower near Cherskiy, Russia.  An automated CO2 height profile measurement system was installed to help assess the role of periodic CO2 storage in daily or hourly flux estimates.  During periods of low wind, such as commonly occur during night-time, turbulent mixing of CO2 can be reduced such that levels near the ground may differ from the concentration observed at the eddy covariance measurement height.   Our system will measure 5 different heights from 2m to 35m along the tower several times per hour.  This year looks to be the best yet in term of getting continuous high-quality flux measurements from this site, thanks to the efforts of our Russian colleagues. 

PPark tower

 

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Imnavait Cr Biomass harvest - Aug 2013

Aug
09

We performed a detailed biomass harvest of tundra vegetation within the footprint of each tower at the three Imnavait Cr sites.  We sampled from the two most prevelant vegetation types within the flux tower footprint.  Plant above- and below-ground biomass was assessed such that present and past produciton could be calclulated.  We also characterized the soil available N, C/N and thaw depth and other basic parameters.

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