Stormar 2015-04-20

http://lagmansnatursida.se/dbarkiv/2015/vecka17/db15apr20.htm
 
Man kunde varit ännu tydligare som IPCC är i sin rapport. De säger ” “The influence of past and future climate change on tropical cyclones is likely to vary by region, but the specific characteristics of the changes are not yet well understood, and the substantial influence of ENSO and other known climate modes on global and regional tropical cyclone activity emphasizes the need for more reliable assessments of future changes in the characteristics of these modes…. Although projections under 21st century greenhouse warming indicate that it is likely that the global frequency of tropical cyclones will either decrease or remain essentially unchanged, concurrent with a likely increase in both global mean tropical cyclone maximum wind speed and rainfall rates, there is low confidence in region-specific projections of frequency and intensity…. The global number of ETCs is unlikely to decrease by more than a few percent due to anthropogenic change. A small poleward shift is likely in the SH storm track, but the magnitude is model dependent. There is only medium confidence in projections of storm track shifts in the Northern Hemisphere. Nevertheless, model results suggests that it is more likely than not that the N. Pacific storm track will shift poleward, and that it is unlikely that the N. Atlantic storm track will respond with a simple poleward shift. There is low confidence in the magnitude of regional storm track changes, and the impact of such changes on regional surface climate.” ETC betyder “Extra Tropical Cyclones” alltså oväder på våra breddgrader. Dessa ska troligtvis minska något och de tropiska kan även de minska lite i antal.
 

Redan på mellanstadiet i grundskolan får eleverna lära sig detta att stormarna ska öka. I en geografibok som används på mellanstadiet hittar jag detta.

 

 
 

Varför ska det vara nödvändigt att skrämma våra små mellanstadieelever på detta sätt?

 

 

 

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