My understanding is that they <i>couldn't</i> make everything available, because some of their data came from sources with confidentiality conditions attached. See, e.g., <a href="http://www.newscientist.com/article/mg20427393.600-battle-for-climate-data-approaches-tipping-point.html" rel="nofollow">http://www.newscientist.com/article/mg20427393.600-battle-fo...</a> (note: "New Scientist" is less than perfectly reliable, but I have no reason to think they're wrong on this particular point).