Tuesday, May 8, 2012

April 2012 temperatures up 0.2°C

The TempLS analysis, based on GHCNV3 land temperatures and the ERSST sea temps, showed a monthly average of 0.52°C for April, up from 0.32 °C in March. In fact, the March figure had also been revised upward by 0.03°C with late data, so the cumulative rise is 0.33°C since Feb. MSU-RSS satellite temp is also way up (by by 0.26°C).  There are more details at the latest temperature data page.

Update David Appell says that UAH rose even more, by 0.295°C
Further update - on re-reading, I'm not sure if the UAH figure was a rise or an absolute amount.

Latest - Roy Spencer has posted. The new value is 0.30°C, a rise of 0.19°C

Below is the graph (lat/lon) of temperature distribution for April. Still warm in the US, and pretty warm all over.

Update: I have added an interactive spherical projection map for the month. It's useful for seeing the Arctic warming in perspective. It's at the end of the post.

This is done with the GISS colors and temperature intervals, and as usual I'll post a comparison when GISS comes out.
And here, from the data page, is the plot of the major indices for the last four months:

Finally, here is the interactive worldview of April surface temperatures. Just click on the yellow squares to see different views of the Earth. The bottom square is the S pole view. The first click takes a second or two for loading.


  1. That's quite a jump - not surprising given the La Nina just finished of course. I've been wondering why UAH was so late coming out - we're already a week into May and no numbers??

    Anyway, it looks like GISS for April should finally be close to my prediction for this year's average:

    I wonder how high it will climb in the monthly numbers later on? If El Nino starts showing up we may see a record for monthly anomaly...

  2. Arthur,

    Roy Spencer said on his blog that John Christy was out of the country, causing a delay in producing the UAH results.