The NCDC August report is in! My favourite monthly nerdfest.
(As we can see, the trough situation in central North America has calmed down a bit since earlier in the summer. Actually, since the beginning of September, we’ve had near-record highs in my area. I think July and September switched places.)
This has been the second warmest August on record; the oceans alone are the warmest on record.
Another interesting thing about this month’s report is that we can now see the summary for the season (June-August):
We’re approaching the top of the charts here. It’ll be interesting to see the GISS data when it comes out in January. I wonder how long until we surpass 1998 and 2005?
(Of course, I’d much rather that we never surpassed those years…..but since it seems somewhat inevitable, on the track we’re on……..it’s pretty interesting to watch and wonder.)
Question: are El Niños becoming more common – didn’t we just have one in 2007? – and are they expected to do so with climate change?
Update (22/9/09): Thanks to Joel, who tracked down some citations for the ENSO question – according to part 10.3.4.5 of the IPCC AR4, “there is no consistent indication at this time of discernible future changes in ENSO amplitude or frequency”.
Update (23/9/09): Due to some confusion in the comments, I’d like to clarify that the comment policy for acceptable citations does still apply when we’re discussing ENSO and temperature trends.