The Azimuth Project
Letter to Ludescher et al

Dear Ludescher et. al,

We’re writing to you from the Azimuth project, which is a group of mathematicians, scientists and programmers working together to understand environmental problems. We have taken a great interest in your paper on El Nino prediction, which has in fact inspired a whole burst of new research participation in our group – for this alone we thank you.

Here are some of the efforts this has spawned off:

  • Graham is working to reproduce your results, and has come close

  • Dara is taking a wavelet-based approach to…

  • John…

  • WebHubTel…

  • Tanzer gave a recap of your definitions in this thread…

  • Nadja had found a definitional issue with your notation for the running means, the details are described in the blog post El Niño Project (Part 3). She has not been further involved in the current discussion. She had sent on Jun. 20 an email to the email as listed as correspondent in the article at with the following text: Hello The cross-covariance as defined in your article “Improved El Nino forcasting by cooperativity detection” seems different than the usual covariance. I just wanted to point that out, in case this was not intended. I remarked this also in a discussion here: regards

We’re also interested in further developing the methodology for the ideas you introduced. Steve Wenner, WebHubTel and Hypergeometric have probed for some potential problems with the methodology in some blog posts.

So far we have the following:

  • list blog articles

  • list wiki pages

  • list discussion threads

  • pointers to code repository

We would really like to get as much feedback from you as possible on all of these ideas, especially as we hoping to further the subject with followup articles. Please contact us!

Or, even better, if you participate in our ongoing discussions, we can give you a login for our discussion forum.

Even apart from the academic interest of these ideas, we are motivated by the underlying theme of working on challenging problems that have a real bearing on the environmental crisis.

Thanks again for your contribution, and hoping to hear from you,

The Azimuth Team