This search engine will scan a large number of sites known to have good climate change related information on them.
Below is a list of sites scanned. If you know of a site that is not included here but that should be, please put a link in the comments. Don’t bother with climate science denialist sites, they will not be added.
Also note that many sites are parts of larger domains. So if the site you suggest is already part of, for example, Scienceblogs, The Guardian, etc. then it is already on the list by default. This, of course, means that some of the hits from this search engine will be not “certified” as part of this excellent list of sources because a large domain could have science denialism lurking around on it. But for the most part, the results of this search should be pretty useful. Also, since some very large domains are searched you may want to use some climate change related keywords. For example, searching for the term “hiatus” by itself will get you links for broadway shows taking a hiatus. But searching for “global warming hiatus” will get you (mostly) links about the so-called “pause” in global warming.
There are also aggregating or linky sites on this list so there may be some redundancy in your search results, but there is not much one can do about that.