A Commentary is an AGU paper type that offers a perspective on a recent result, controversy, or special event in particular field. JGR Space Physics published 15 Commentaries in 2016, most of them as part of the special section on Unsolved Problems in Magnetospheric Physics. These short articles are meant to spur discussion, action, and hopefully eventual resolution regarding the chosen topic. In JGR Space Physics, they are too new to understand and quantify their influence. Other journals have published Commentaries for many years, and the anecdotal evidence is good enough that AGU is encouraging all journals to publish more of these.
To better highlight and promote the existence of these papers, AGU has assembled several new special collections that gather these Commentaries for easy discovery. The link is on all journal websites, under the Special Collections pull-down menu:
On this page are links to the Commentaries in each AGU discipline, including Space Weather and Space Physics. There are Commentaries here from a few different journals. Because papers cannot be in two special sections in the Wiley paper management system, instead of listing all of the UPMP Commentaries, there is simply a link to that special section’s webpage.
Happy reading!
Notes from the JGR-Space Physics Editor-in-Chief 
Pingback: Letters and Commentaries | Notes from the JGR-Space Physics Editor-in-Chief