We make a first rough analysis of the winters of the 2000s. What has characterized the years during the winters, what changes there have been average, in different parts of the globe?
In the first picture I put the differences in GPT at 500 hPa between the 2000s and '90s and that I would say that we can provide the most important and comprehensive view of changes have occurred in the last 10 winters:
an increase in "General" geopotential, a symptom of global temperatures this increase was stronger in polar areas, especially in the north, an important one on Greenland the increase in the polar areas has led a smaller neighborhood and then find the areas of GPT strong decrease in average ranges in the tropical zone there had slight increasesexcept in the ENSO remained more or less steady while the area Indian and Atlantic IPWP show increases between 5 and 10 mt. Central European area and Italy have seen a sharp fall in GPT
We see the reflection on the temperatures at ground
The considerations are obviously the same as before, the antizonalità increased compared to the 90's, very neighborhood, brought significantly decreased in both the NH mid-range in Siberia, Mongolia, north China and in central and northern Europe and the USA. Increased antizonalità in the south polar region has instead led to strong decreases in Antarctic coastal areas and increased in the central area. Strong increases in temperatures on the north polar area, northern Canada, Alaska and Greenland.
Note the large increase in the area IPWP.
We see the trend number of winters in the last 60 years come anomalies at 500hPa on some bands GPT significant (reanalisi NOAA):
the two polar areas, 90-70N and 90-60S:
We note the increase of GPT on the north polar region from the absolute minimum period that occurred around 90 years, years of strong zonal and compactness of the VP. In the south polar region instead we have only the oscillations with a phase slightly positive in half 'of the 2000s. Record last winter in the north polar area.
Note that in recent years it has a rather obvious synchrony between phases and less zonal zonal whereas previously this synchrony is just impromptu and some peaks in zonal or antizonalità .
Midrange NH (55-35N) and tropical zone (20S-20N):
In the tropical zone and of course there is the history of GW, the GW because it comes from them and in fact we see the Climate Change of 1976 and the step 1998. The change covers the area of 76 ENSO, while the step of 98 were recorded mainly in the area of India and IPWP. The midrange has suffered slightly after the change and would feel quite strong zonal period of the VP around 90 years with the peak absolute. Impressive last winter on the midrange which happens to be the 5th most anomalous of the last 60 years, the most anomalous of 78, thanks to its record high on gpt north polar area.
Finally we see a zoom on the last 3 winters to see what kind of short-term changes are taking place in the winters, and geopotential at 500 hPa temperatures at ground
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The decrease in the area is justified by the strong ENSO of 2008, Nina, Nino is not counterbalanced by the current, then there is a provision to lower PDO with a strong increase of GPT Area Aleutians. Strong cooling over the lands of Asia and America. Area antrtica, except this year, the previous two years had certainly lived two winters neighborhood with decrease of GPT on the continent. Warming over Greenland, indicative of changes in the jet in all the years 2000 and continued in recent years.
A brief analysis but which I hope will give you an idea of what is happening to our winters, and those of other areas worldwide.
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This post has tag Alaska, America, Antarctic, antizonalitÃ, area, Asia, Atlantic, Central European, change, different parts of the globe, general quot, geopotential, global temperatures, Global warming, GPT, Greenland, hpa, increase, India, IPWP, Italy, Mongolia, neighborhood, Nina, Nino, north China, northern Canada, northern Europe, polar area, polar areas, quot, region, Siberia, south polar region, trend number, USA, view of changes, VP. In, zonal, zone, and posted by Mara Mei under category Stop Global Warming. Good Articles :