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For earlier materials see Table of Contents

April 13th

Showery in PR

 

High Pressure still determining weather

looks like 2 high areas 7 hours later (image right)

 

 

 

Acidification in Oceans – Problem??

Along with increasing global temperatures cuased by rising CO2 levels in atmosphere – the ocean is aborbing more – lowering the pH --- bad news for corals in tropics – but what about plankton etc?

Start with the Wiki article on ocean acidification

It has good links and references—

See the ICES workshop on acidification May 2007 PDF for what is and not known – the graphic left from that article – shows increase in aquaculture – experiments show mussel highly sensitive – but oyster isn’t fussy when comes to lowered pH 

 

Here is NOAAs CO2 acidification page – with links to recent stories --- Off BC coast Ocean Station Papa will also monitor CO2

 

 

 

Topic suggested to me when reading  Mesa Verde Migrations – in recent American Scientist magazine

Here is an online  MS Word Doc that outlines the ‘complexity’ argument in Hamlets to Villages ‘progression’

Here is earlier Sci. American reprint using computers etc to model the Mesa Verde population 800-1200

Here is excellent intro site to pueblos –etc of Mesa Verde

Mesa Verde

Looking beyond climate change -> ‘warfare and increasing social complexity – recent article – site with annoying cookies but unlike similar on NY Times has full story ‘free’

Dundas Island compared to Mesa Verde

As I described yesterday Anne Ruggles Master’s thesis argues site left was a ceremonial structure – not a dwelling --- With time Dundas went from small hamlets to large villages – and ‘ceremonial’ functions transferred from (Kiva) to ‘chiefs’ dwelling

 

In Mesa Verde – they also went form small ‘pit houses’ to large masonry structures – and then abandoned completely --- why is a much debated question --- like Dundas , the larger sites could have been for ‘defence’ --- or it could have been from just increasing social complexity --- I suspect both arguments could be made for Dundas --- and perhaps similar time periods – note ‘climate change (1300-1850) when temperatures got much colder may be when ‘invaders’ came to Dundas

 

 

 

 

 

 

 

 

 

Created by LG on 13/4/2008

Last updated on Monday, April 14, 2008