I wrote:

> I’m not sure there are “applications” yet, except for Ludescher et al’s attempt to use them for El Niño prediction.

I was forgetting what Nathan Urban said:

> I ran across a paper I thought could be of interest to Azimuth climate network people: ["Deep ocean early warning signals of an Atlantic MOC collapse"](http://onlinelibrary.wiley.com/doi/10.1002/2014GL061019/abstract). It uses a climate network approach, using methods developed in earlier work (["Interaction network based early warning indicators for the Atlantic MOC collapse"](http://onlinelibrary.wiley.com/doi/10.1002/grl.50515/abstract) and ["Are North Atlantic multidecadal SST anomalies westward propagating?"](http://onlinelibrary.wiley.com/doi/10.1002/2013GL058687/abstract)).

> Open versions [here](http://www.climatelinc.eu/fileadmin/UG_ADVANCED/Publications/Qingyi-Dijkstra-2-FAMOUS_grl52004.pdf), [here](https://www.pik-potsdam.de/members/kurths/publikationen/2013/mheen_grl50515.pdf), [here](http://www.climatelinc.eu/fileadmin/UG_ADVANCED/Publications/QINGYI-and-Dijkstra--Are_North_Atlantic_multidecadal_SST_anomalies_west_propagating.pdf).