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# Blog - El Niño project (part 8)

I'm now going to write some articles in this series that will help me prepare for my talk at NIPS. Since my title is "Climate Networks", I need to talk about climate networks! The Ludescher et al paper gives an example, but it doesn't talk much about the general idea, and they do rather little with the network (more precisely, weighted graph) that they construct: they only compute the average link strength. Now I want to review some other literature on climate networks. I'll write the article here:

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Okay, I think this blog article is ready for review! It has limited goals, and I think those goals are met. See what you think.

Comment Source:Okay, I think this blog article is ready for review! It has limited goals, and I think those goals are met. See what you think.
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edited October 2014

Any comments? One could argue that I should talk more about the "meat" of the paper. I think I'll just add some graphs showing link strengths as a function of distance. This will lead up nicely to Graham Jones' graphs of correlations as a function of distance.

Comment Source:Any comments? One could argue that I should talk more about the "meat" of the paper. I think I'll just add some graphs showing link strengths as a function of distance. This will lead up nicely to Graham Jones' graphs of correlations as a function of distance.
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think I’ll just add some graphs showing link strengths as a function of distance.

The best, picture worth a thousand words.

It reads really well and lacks that fluff I see in the related publications, it delivers the concepts.

Dara

Comment Source:> think I’ll just add some graphs showing link strengths as a function of distance. The best, picture worth a thousand words. It reads really well and lacks that fluff I see in the related publications, it delivers the concepts. Dara
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edited October 2014

Good work, with clear explanations of interesting material.

Sorry I don't have enough available CPU time to think it through in greater depth right now. In lieu of this, a couple of points on the text itself.

This time I'd like to compare a different paper on climate networks:

Compare to what? Consider another verb here.

I suggest abridging the quoted passages in the conclusion, and adding some interpretation to it. As it stands now, it feels a bit disjoint from the main text, and has a diluting effect on the piece as a whole.

Comment Source:Good work, with clear explanations of interesting material. Sorry I don't have enough available CPU time to think it through in greater depth right now. In lieu of this, a couple of points on the text itself. > This time I'd like to compare a different paper on climate networks: Compare to what? Consider another verb here. I suggest abridging the quoted passages in the conclusion, and adding some interpretation to it. As it stands now, it feels a bit disjoint from the main text, and has a diluting effect on the piece as a whole.
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The focus on a different paper is good. The point that comes across on first read is that the ENSO phenomenon can be so strong that it will disrupt the climate links that normally occur. That is what the new paper adds in comparison to the Ludescher paper.

Comment Source:The focus on a different paper is good. The point that comes across on first read is that the ENSO phenomenon can be so strong that it will disrupt the climate links that normally occur. That is what the new paper adds in comparison to the Ludescher paper.
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The only thing that leaps out at me is more something to think about: their climatological average is taken over all years in the dataset. It would be nice to know how sensitive the results are to that: it wouldn't surprise me if it was essentially the same using just the years in the first half, and would preserve the ability to use the second half adls test data for any algorith.s. but I'm not sure it's actually worth a comment in the article.

Comment Source:The only thing that leaps out at me is more something to think about: their climatological average is taken over all years in the dataset. It would be nice to know how sensitive the results are to that: it wouldn't surprise me if it was essentially the same using just the years in the first half, and would preserve the ability to use the second half adls test data for any algorith.s. but I'm not sure it's actually worth a comment in the article.
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I can't see any images. My browser says

Connecting to math.ucr.edu...


for a while then gives up.

I think the post needs an earlier mention and (informal) comparison with Ludescher et al. The definitions look very similar, and the papers share 3 (I think) authors. I'd bet they also share code, and hence, probably, exact definitions too.

Comment Source:I can't see any images. My browser says ~~~~ Connecting to math.ucr.edu... ~~~~ for a while then gives up. I think the post needs an earlier mention and (informal) comparison with Ludescher et al. The definitions look very similar, and the papers share 3 (I think) authors. I'd bet they also share code, and hence, probably, exact definitions too.
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edited October 2014

Hi, folks. I accidentally posted the blog article before making some of the changes you suggested. I'll make some now.

David Tweed wrote:

Compare to what?

To Ludescher's paper, but I guess that wasn't obvious!

Graham wrote:

I think the post needs an earlier mention and (informal) comparison with Ludescher et al.

Well, I don't think I'll have time to compare it to Ludescher, but I should clearly mention them.

I'm hoping now is to quickly run through a number of different papers on climate networks before I give a talk on this stuff in a month and a half. The resulting blog articles will be rather hasty and dry. For example, that's why I just quoted the discussion in the Berezin et al paper instead of digesting it. Sorry, but I gotta rapidly get myself up to speed! I'm at the limit of my capacity, going crazy teaching two advanced courses, writing grant proposals and getting ready for this talk.

Graham wrote:

I can’t see any images...

I hope that's fixed now. Sometimes the UCR math department computer crashes. It looks fine to me now.

Comment Source:Hi, folks. I accidentally posted the blog article before making some of the changes you suggested. I'll make some now. David Tweed wrote: > Compare to what? To Ludescher's paper, but I guess that wasn't obvious! Graham wrote: >I think the post needs an earlier mention and (informal) comparison with Ludescher et al. Well, I don't think I'll have time to compare it to Ludescher, but I should clearly mention them. I'm hoping now is to quickly run through a number of different papers on climate networks before I give a talk on this stuff in a month and a half. The resulting blog articles will be rather hasty and dry. For example, that's why I just quoted the discussion in the Berezin _et al_ paper instead of digesting it. Sorry, but I gotta rapidly get myself up to speed! I'm at the limit of my capacity, going crazy teaching two advanced courses, writing grant proposals and getting ready for this talk. Graham wrote: > I can’t see any images... I hope that's fixed now. Sometimes the UCR math department computer crashes. It looks fine to me now.
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edited October 2014

John wrote:

David Tweed wrote:

Compare to what?

You can hold me responsible for that question :)

I was just suggesting a wording change, since formally it looked like the sentence was missing an argument.

Comment Source:John wrote: > David Tweed wrote: > > Compare to what? You can hold me responsible for that question :) I was just suggesting a wording change, since formally it looked like the sentence was missing an argument.
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John said

I’m at the limit of my capacity

And beyond mine! I've been busy writing this paper and the software that it describes, but no other significant responsibilities. Anyway you have now mentioned Ludescher et al enough for me.

Comment Source:John said > I’m at the limit of my capacity And beyond mine! I've been busy writing [this paper](http://biorxiv.org/content/early/2014/10/09/010199) and the software that it describes, but no other significant responsibilities. Anyway you have now mentioned Ludescher et al enough for me.
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Thanks guys... sorry for mixing up the two D. T.'s.

Looks like an interesting paper, Graham!

Comment Source:Thanks guys... sorry for mixing up the two D. T.'s. Looks like an interesting paper, Graham!
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Speaking of reviewing other papers on climate networks, Tupikina et al. (2014) could be interesting. I'm not sure if it's been mentioned here yet. One result from the abstract: "While this real-world [common component evolution function] displays a high degree of network persistence over large time lags, there are distinct time periods when common links break down. This phasing of these events coincides with years of strong El Niño/Southern Oscillation phenomena, confirming previous studies."

Comment Source:Speaking of reviewing other papers on climate networks, [Tupikina et al. (2014)](http://www.nonlin-processes-geophys.net/21/705/2014/npg-21-705-2014.html) could be interesting. I'm not sure if it's been mentioned here yet. One result from the abstract: "While this real-world [common component evolution function] displays a high degree of network persistence over large time lags, there are distinct time periods when common links break down. This phasing of these events coincides with years of strong El Niño/Southern Oscillation phenomena, confirming previous studies."