LU Fluxes - Lund University Flux Measurement Group

If you happen to live in or around Lund, maybe we will see you 25 October on the Opening of Climate and Forests – A New Popular Science Exhibition at Naturum Skrylle: www.becc.lu.se/calendar/ope...

Anna-Kristina Voss presenting her work on ecosystem modelling of perennial crops

Veronika Widengren presenting her work on eddy covarience measurements at both perennial and annual cropping systems

Tim Crews sharing his, and The Land Institute's, extensive knowledge and experience on perennial crops

Inspiring presentations today at our annual Perennial workshop! Huge thanks to our PhD students Veronika and Anna for sharing their research, and to Kernza experts Tim and Doug for their deep insights into perennial grain agriculture.
@beccsweden.bsky.social
@thelandinstitute.bsky.social

Visit us in Lund in 2026 via @fluxnet.bsky.social Secondment program. Get hands on experience & work with data from agricultural/forest EC Sites, incl @hyltemossa.bsky.social & others within @icossweden.bsky.social

Reach out to discuss potential project ideas.

@fluxnetecn.bsky.social @icos-ri.eu

Transporting away our big straw yield from the #Kernza field

The highly international Perennial team in front of our EC flux tower in Alnarp, southern Sweden

#Kernza experts inspect this year's yield from the Alnarp site

Inspection of a #Kernza field directly following harvest after a year with high weed pressure

Our highly international Perennial team have met up in southern Sweden for a tour of sites growing the perennial wheat #Kernza (including our eddy covariance site in Alnarp) to start off a three day workshop
@thelandinstitute.bsky.social
@crews-tim.bsky.social
@lund-university.bsky.social

Forest inventory underway at our continuous cover forestry site, aimed at characterizing stand structure, growth dynamics and management outcomes. A key challenge involves quantifying natural regeneration by counting seedlings and saplings
@beccsweden.bsky.social
@lund-university.bsky.social

Anna has spent a few days taking soil and root samples down to 2 m depth in our perennial wheat field. Hard work but she's has good help from Jonas and Ryan from SITES Lönnstorp... and from the Wintex soil corer
#Kernza
@lunduniversity.bsky.social
@beccsweden.bsky.social
@crews-tim.bsky.social

Securing the forest carbon sink for the European Union’s climate ambition - Nature Actionable research recommendations are outlined to improve the monitoring and modelling of forest resources and their carbon sink, and to better inform forest management decisions and the European Green Deal.

💡We would like to point out this article, which was published on July in @nature.com: #NGC colleagues Mirco Migliavacca (lead author), @anabastos.bsky.social, Philippe Ciais, and Martin Herold contributed to the writing. Read it from the link below: www.nature.com/articles/s41...

Call for ICOS Science Conference 2026 session proposals is open ICOS Science Conference, organised every second year by the ICOS community, is a global event open to scientists and other experts working in greenhouse gases and biogeochemical cycles. ICOS Science C...

🎺Call for session proposals for ICOS Science Conference 2026 is now open!🎺

The theme of the conference is “Science, Data, Services: Together for Climate Action”. Submit your session by 12:00 CET October 24, 2025.

More info: icos-cp.eu/news-and-eve...

#ICOS2026SC

... endless cable meters for a side by side PAR sensor comparison. 20 sensors from the below canopy setup, 2 from the mast, 8 spare & on top 35 extra for a fPAR comparison between @icos-ri.eu & @copernicusecmwf.bsky.social GBOV within #NUBICOS

@icossweden.bsky.social @lund-university.bsky.social

Campbell CPEC310 EC tower set up 50 m away from our permanent flux tower investigating climate benefits of perennial crops compared to normal crop rotation. Great work by our students!

Students hard at work installing all additional sensors

Aleksander's instructing the students how to do chamber measurements using Licor LI-7810 and PP Systems EGM-5 gas analyzers

Installation of the EC system

Great fieldwork days with our new batch of Master students, here at at our agricultural site. During these days, they have set up their own eddy covariance tower and practiced flux measurements using chambers, among other things.
@lunduniversity.bsky.social
@crews-tim.bsky.social

This summer @alindroth.bsky.social worked hard to set up soil & trunk CO2/CH4 chambers around our subcanopy EC system. Mikhail Mastepanov, designer & builder of the soil chambers, helped set up Ander's latest trunk chamber design yesterday.

@lufluxes.bsky.social @icos-ri.eu @icossweden.bsky.social

Last week Linda & Johannes from @gfz.bsky.social visited to scan the forest around the @icos-ri.eu EC flux mast with a LIDAR drone. All went well, so they scanned the young stand at the @lufluxes.bsky.social EC mast too.

@icossweden.bsky.social @fluxnet.bsky.social @lund-university.bsky.social

Today it was time for the second annual harvest of our perennial wheat #kernza. Perfect harvest weather and it seems like both grain and straw yield will be significantly higher than the first year.
@lundsuniversitet.bsky.social @beccsweden.bsky.social
@crews-tim.bsky.social

Assimilating multi-site eddy-covariance data to calibrate the wetland CH4 emission module in a terrestrial ecosystem model Abstract. In this study, we use a data assimilation framework based on the adaptive Markov chain Monte Carlo (MCMC) algorithm to constrain process parameters in LPJ-GUESS model using CH4 eddy-covarian...

Exciting new paper with LU Fluxes involvement out now:

"Assimilating multi-site eddy-covariance data to calibrate the wetland CH4 emission module in a terrestrial ecosystem model"

bg.copernicus.org/articles/22/...

Soon time for harvest at our #Kernza site in Alnarp,Southern Sweden. Exited to analyze 2 years of perennial crop EC flux measurements & compare the C balance to conventional crops (1 year rape seed & 1 year winter wheat).

@lundsuniversitet.bsky.social @fluxnet.bsky.social @crews-tim.bsky.social

Flux tower maintenance at our agricultural site today.
Tobias and Peter adjusted the flux system height following harvest of the winter wheat, cleaned all sensors and cameras etc.
@crews-tim.bsky.social

Stig is doing N2O flux measurements in a ley experiment at the SITES Lönnstorp station. Challenging task in this variable weather...

Nice cloud formation seen from the Hyltemossa.bsky.social tower yesterday!

We were lucky and all the rain and thunderstorms passed us, while it was calm and sunny.

@icossweden.bsky.social @icos-ri.eu @actris.bsky.social @lufluxes.bsky.social @lund-university.bsky.social

First round of N2O flux measurements from ley (and more crops/treatments) in our new project is underway.

Minutes before the rain hit the Eddy covariance tower in Dahra, Senegal.

From Swedish forest to Savannah, fun to swap @hyltemossa.bsky.social for some days to help Aleksander with the GHG gradient setup & maintaining the EC system run by Torbern
@lufluxes.bsky.social @lunduniversity.bsky.social

Maintenance in full swing at the Dahra site, with Osman and Tobias as tower crew and Aleksander on the ground. Check and cleaning of the EC gas analyzer done and filters in the profile system swapped. So far all went smoothly.

While a heatwave is pounding Europe some of us got away to enjoy surprisingly slightly cooler weather in Senegal. 31 C only but very humid since it's the beginning of the rain season. Still pretty dry and bare in the the footprint of the Dahra EC tower though.

We managed to pick the hottest day of the year for installations of collars for N2O chamber measurements in agricultural trials at SITES Lönnstorp. Still relative cool compared to southern Europe these days...

Breathing Forests, Bridging Worlds: Blessing Kavhu's FLUXNET Secondment experience - FLUXNET Blessing Kavhu, recipient of the 2025 FLUXNET Secondment Program award, has completed the program and wrote the following to share with the FLUXNET community: ___________________________ Breathing For...

Read about Blessing Kavhu's enriching experience during his Fluxnet Secondment with us at LU Fluxes in Lund!

Blessing's time with us was brief, but his impact was profound. We're grateful for the lasting impression he left on our team. Wishing you all the best in your future endeavors, Blessing!

Exiting visit from @crews-tim.bsky.social at our perennial crop site today. Tim is chef scientist at The Land Institute in Kansas and an expert on the perennial wheatgrass IWG (Kernza) we're growing in cooperation with TLI. The IWG seems to be growing well this year, already up to 1.5 m tall

Visit us in Lund for the ICOS Science Conference next year!

@icos-ri.eu @icossweden.bsky.social @lund-university.bsky.social @lufluxes.bsky.social

Great workshop celebrating ICOS Sweden in Lund today!
- 30 years of measurements in Norunda
- 15 years of ICOS Sweden national network
- 10 years of measurements in Hyltemossa
- 10 years of ICOS Carbon Portal

Field visits in Lönnstorp and Alnarp by the Lund University "perennial club" (researchers with ongoing projects on perenial crops) today, followed by a workshop at SLU Alnarp. Quite interesting day.

Veronika is describing her PhD project on perennial wheat in the pictures below

Busy day at the agricultural site today: CO2/CH4 chamber measurements and LAI measurements on both annual and perennial crops, and manual augering of groundwater wells. The wells will help us keep better track of the groundwater level and nutrient leaching and be the basis for hydrological modelling