Although locally we have been enjoying unusual warmth in the last few weeks, globally the opposite has been true. Indeed, at the end of last week Remote Sensing Systems, an organisation backed by NOAA, announced that March 2011 was the coldest March since 1994, according to their analysis of satellite data.
This is the first month since June 2008 that the global temperature anomaly has been negative on this measure.
The image below shows which regions of the world were coldest and warmest in March.
According to the University of Alabama Huntsville (UAH) satellite data analysis, March 2011 continued to cool (see graph below) with the tropics, Northern and Southern Hemisphere all showing a negative anomaly.
As the impact of La Nina continues to fade in the Pacific, global temperatures should begin to stabilise at these levels, and then cyclically rise in the next few months. Nevertheless it's been quite a spectacular drop in the last 12 months.
Source: http://www.bbc.co.uk/blogs/paulhudson/2011/04/coldest-march-globally-for-17.shtml
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