parallel regions

Don Journet
Sun, 22 Nov 2009 05:07:06 PST
  Assessments in relation to parallel regions is surely always going to 
be problematical especially in this time of global warming. Here in 
South Central Victoria, Australia we are currently experiencing the 
hottest November on record although today we have suddenly received a 
quite substantial dump of rain which is more than we have had for months.
     Bearing in mind that this is equivalent to a northern May we have 
had temperatures in the mid 30's C and not much further north up in the 
40's. This region is normally considered cold climatic zone 9b and heat 
zone 4 and thus reasonably mild. We are only in Spring and the leaves of 
the Agapanthus have been burnt and many spring bulbs have lost their 
leaves prematurely. As an indication of the way plants are feeling the 
heat quite a few sedums have been cooked as have the leaves of some 
echeveria. With the sedum the most vulnerable area seems to be from soil 
level with the dead stem tissue progressing up to where the middle aged 
leaves are situated. I have lost many young succulent plants even though 
they have been fully exposed to the sun right through winter and early 
spring and thus should be acclimatised.
     With such changes occurring are we in a position to seriously find 
parallel regions beyond a fairly arbitrary set of conditions which may 
be compromised even with our extensive deliberations.  In our current 
situation we do not even have parallel region conditions in our local 
area where history is being rewritten.

Don Journet

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