We are conducting  a pilot study to evaluate methods for the estimations of aerodynamic roughness parameters (i.e., roughness length (z0), zero plane displacement height (d)) from single-level eddy covariance measurements. Results will guide development for future AmeriFlux and FLUXNET datasets.  Thanks to the flux community, most required variables are available through the AmeriFlux database (e.g., wind speed (WS),… More

At one of the NGEE Arctic sites in the Seward Peninsula, near the town of Council, Alaska, the Dream Team—myself, Oriana Chafe, Margaret Torn (NG Arctic team lead), Stan Wullschleger (NG Arctic PI), Mark Conrad, Bryan Curtis and Sigrid Dengel (AMP) (see photo, left to right)—is flying a DGI model Inspire-1 UAS (unmanned aircraft system, or drone)…. More

Updated 7/19/16:  Registration is open! The 2016 AmeriFlux Annual Principal Investigators Meeting takes place Wednesday evening, September 21, through Friday, September 23, 2016. All members of the AmeriFlux Community are welcome. Let’s celebrate the AmeriFlux Network’s 20th Anniversary! Place: Golden, Colorado—Denver West Marriott Hotel, about 35 miles from the Denver Airport. Lodging deadline: August 30, 2016 Registration:  $150… More

The 8th Colorado Flux Course (#fluxcourse; http://www.fluxcourse.org/) was recently convened up at Niwot Ridge, Colorado. Twenty-five students from across the US and globe came to hear lectures on eddy covariance, flux instrumentation, leaf cuvette systems, land surface modeling, remote sensing and data fusion modeling.  Students also toured the Niwot Ridge AmeriFlux site (US-NR1) and visited NEON…. More

Evapotranspiration based on equilibrated relative humidity (ETRHEQ): Evaluation over the continental U.S. From Water Resources Research 51(4),2951-2973, 2015. DOI: 10.1002/2014WR016072. Copyright (2015) American Geophysical Union. Guido Salvucci’s group at Boston University are avid users of AmeriFlux data. There is a new paper in Water Resources Research that explores a way to estimate watershed scale evaporation…. More

There is growing interest to use sun induced fluorescence to estimate ecosystem photosynthesis from space.  This new paper from Yang et al tested indices from hyper spectral reflectance measurements with gross carbon fluxes at Harvard forest. Results look interesting and the response between SIF and GPP is much more linear than that between GPP and… More

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Check out this new feature on the AmeriFlux website. You can now request populated BADM templates for tower sites. To make a request: From the Data menu, choose Download Data. Click the BADM button. Use the form to specify which tower sites and templates you want. Click the Request BADM button. You will receive an… More

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Good metadata management is especially important when data are shared across a large community.  Therefore, AmeriFlux is encouraging all sites to fill out an instrument operations (Instrument_Ops) BADM template within the next three months. Both instrument BADM templates have recently been updated: The updated Instrument_Ops template is designed for the submission of basic instrument operations… More