The SPARC Reanalysis Intercomparison Project report has been published in an early online release! This has been nearly a decade in the making – I had only one child when I first got involved – but the long effort has really paid off. I am of course partial to Chapter 6, Extratropical Stratosphere-troposphere Coupling, but the entire report is full of information about the reanalyses and the stratosphere.
What is a reanalysis, you ask? Check out chapter 1. How you get make a reanalysis? See chapter 2. What is the stratosphere and why is it important? Peruse chapters 3-11. And for the take home summary, cut to the chase and read our conclusions in Chapter 12.