The news posted in Science, here. To my mind, he is a superb choice. Kudos to the White House. Kelvin was Vice Chair of the National Science Board during the first two years of my tenure leading BIO at NSF and I was always struck by his thoughtful way of working through really big challenges, while at the same time pushing everybody forward. He is a really fine atmospheric scientist and his credibility with the community will help him enormously.
If he is confirmed, the key question is whether he will have direct access to the President and further, what the quality of those interactions may be.