06/14/2010
May had a very negative EA in May, -1.19, which can be observed in its arrangement configured with the average 500hPa anomalies reported in the opening illustration.
Nothing strange in itself but as data allows me to deepen corelationship between the provisions configured Atlantic and thermal phases in the area ENSO (Nino / Nina).
EA's first see the chart from May 1950 onwards:
-1.19 Is a very low value for the Italians in May, but certainly not exceptional as it was passed six times in the last 60 years and even doubled in 1991 (it was May coldest of the century in Italy ). The peculiar thing is that comes after a period of several years of very positive and medium negative with only a few exceptions (2008, 2004, 1998) and shows a trend scenario decreased under medium (as bluntover 3 years, black line).
I remember that EA ( having long ago on a special post ) has a good correlation with the picture of the average temperatures on the region and its negative phases may amount to 70-75% in fresh steps to Italy and indeed the month May was much cooler than the average of the last 10 years in May (-0.3 ° to the 2000-2010 average of +1 °).
We come to the monthly figure since 1997, I put in the chart below the averages smoothed and directions of the main phases ONI (ENSO, the phases of Nino)
It shows very well how ENSO phases influence the conf IGURE in the Atlantic zone and in particular the East Atlantic, 98, 2007 and 2009/10 show clear phases of increase and subsequent decline and with the decline phase of Nino, and although there are some decorrelation would say that the thing is quite evident even within the medium term, from 1950:
So it seems the momentum achieved over the Nino including in the East Atlantic and May has given a strong jolt and June seems to go on line configurations between the neutral and negative. It 'started by Nina climatic phase, not only in the Pacific, Atlantic and also in our regions.
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This post has tag anomalies, Atlantic, atlantic zone, average, average temperatures, chart, decline, decorrelation, East Atlantic, enso, Global warming, italians, Italy, jolt, line, line configurations, May, medium, medium term, Nina, Nino, ONI, Pacific, phase, quot, six times, thing, trend scenario, and posted by Mara Mei under category Stop Global Warming. Good Articles :