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Cellulose extractions

posted Apr 5, 2013, 4:07 AM by Koen Hufkens

The small filter vials have arrived ahead of schedule! So, I can run my cellulose extraction tests in the vials I'll use in the final setup. All the chemicals were delivered as well, so I'm good to go after I return from EGU.

SRTM data, some directions...

posted Apr 3, 2013, 9:16 AM by Koen Hufkens   [ updated Apr 5, 2013, 4:15 AM ]

For a new project I needed DEM data. Although the 250m resolution data is easy enough to find the true 90m data by the JRC is buried. Here is a direct link to the data:

Also, a link to a kml file to display the tiles in google earth:

more info here:

and here

EGU talk, field campaign pictures and videos...

posted Apr 3, 2013, 3:02 AM by Koen Hufkens   [ updated Apr 3, 2013, 3:06 AM ]

After scoring a little talk at AGU but having to bail as the chemical analysis wasn't finished in time I can pick up where I left and present my results at EGU.  I'll present my work titled "Multi-decadal carbon and water relations of African tropical humid forests: a tree-ring stable isotope analysis" at Session IG5/CL5.15/SSP4.2, room G13 on Wednesday, 10 Apr 2013, 10:45.

Furthermore, I put some pictures and videos online of the last field campaign. Photos can be found on my personal Flickr page and the videos on the official COBIMFO YouTube channel. Enjoy!

Berlin research stay

posted Sep 24, 2012, 6:18 AM by Koen Hufkens   [ updated Nov 3, 2012, 3:14 PM ]

Two weeks into my research stay in Berlin. The processing of wood cores is on schedule. The first raw results of the 13C and 18O analysis will be in next week. I hope all turns out well as it has been a painstaking job to prepare all the samples.

Peer Review Challenge

posted Aug 25, 2012, 7:15 AM by Koen Hufkens

It seems that my 10 minutes of brain storming is paying off. I was selected as runner up in the Elsevier Peer Review Challenge (, scoring me a nice Galaxy Tab 10.1. Not bad for a small effort.

Looking forward to receiving my new toy!


Phenocam Image Processor -- stand alone versions

posted Jul 23, 2012, 2:17 PM by Koen Hufkens

Due to an increasing demand for my image processing tool, the Phenocam Image Processor I put up a mirror of stand alone versions as provided by Michael Toomey at Harvard University.

You can now download stand alone versions for windows (32/64-bit) and Mac from my Downloads section (see left menu).

Due to size restrictions I could not include the necessary Matlab Compiler Runtime (MCR). However, you can download the required version from the matlab main site (

A link to zip files including both the stand alone versions and the MCR is provided below. These are larger files hosted at the University of California Santa Barbara servers but this connection can be rather sluggish / unreliable (from the EU anyway).

At both locations a short installation and users manual is also downloadable. For any remaining questions regarding the tool please email either me ( or Michael Toomey ( We will happily try to resolve your issues. However, remember this is free software and no guarantees are given. Should you find any bugs please report these as well, and if possible provide a solution :)

Happy processing...

AMS abstracts

posted Jun 21, 2012, 11:20 AM by Koen Hufkens

Some new abstracts from the recent AMS meeting in Boston. Thanks to the Boston University and Harvard friends for the ride along with the phenology train during the past two years.

Friedl M.A, Hufkens K., Melaas E. K. , Richardson A. D. , O'Keefe J. and Bailey A..  Response of Ecosystem Phenology to Anomalous Spring Warmth in the Northeastern United States in 2010. American Meteorological Society First Conference on Atmospheric Biogeosciences, May 30, 2012, Boston, MA, USA.

Toomey, M., Richardson A.D., Sonnentag O.,
Hufkens K., Friedl M.A., Frolking S. and Milliman T.. Determining phenological controls on ecosystem productivity among multiple biomes using digital cameras and eddy covariance data. American Meteorological Society First Conference on Atmospheric Biogeosciences, May 30, 2012, Boston, MA, USA.

Klosterman, S.,
Hufkens K., Friedl M.A., Lavine I., Milliman T., Sonnentag O., Frolking S., and Richardson A.D. Comparison of phenology dates in deciduous forests from near-surface and remote sensing.  American Meteorological Society First Conference on Atmospheric Biogeosciences, May 30, 2012, Boston, MA, USA.

MCD12Q2 synthesis -- slowly putting things together

posted Jun 5, 2012, 1:39 PM by Koen Hufkens

The last few months I've been trying to put together a synthesis of 10 years of MODIS phenology (see EGU 2012 talk). Due to some help from various people left and right this is coming along just nicely. In line with the talk I gave at EGU, although the phenology product is not perfect it keeps showing it's potential in all sorts of ways. All these experiences and lessons learned will for sure find their way into an updated version of the product.

Home sweet second home...

posted Jun 4, 2012, 8:22 PM by Koen Hufkens

Science and vacation time has brought me back to Boston. After four months in Belgium it is good to be back in the buzz of Boston -- the place where science is done at light speed. So far, the trip has been very fruitful. I've been talking albedo with Crystal Schaaf, I've handed over some of my projects to Mark Friedl's new post-doc Josh and I'm still involved personally in some other phenology related projects. As far as I know my matlab tool for webcam data analysis has been expanded by Michael (Toomey) and Trevor (Keenan) at Harvard. It's good to see that effort pay off. I also got some positive feedback of some people I send the executable for processing their images. Sadly, I don't have time to go visit Oliver (Sonentag) in Montreal. But from our fragmented email conversations I know he is doing fine as well.

On a more personal note It has been good to see old friends, within the scientific community and outside of it.

Two new publications I co-authored on...

posted Apr 19, 2012, 2:13 PM by Koen Hufkens   [ updated Apr 19, 2012, 2:13 PM ]

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