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Bob Bingham Blog page.

A series of opinion pieces on, mostly climate change and related subjects to do with New Zealand.

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What to expect with 400 ppm of CO2

9/4/2013

1 Comment

 
400 ppm of CO2 is a 'milestone' figure  but what we should expect is  pretty clear. Tim Naith and othe scientists from Victoria University, Wellington, who have been involved in the Andrill project, have examined the results other their exploration and can point to what we can expect.

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In an outstanding project the team drilled down through the ice, passed through the sea and then deep into the sea bed to recover core samples from the bottom. The material here holds records of the ice flow and temperature through changing climates periods over millions of years.

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Detailed examination of the core samples has revealed that the last time the Earth had 400 ppm of CO2 in the atmosphere was four million years ago, the temperature was 3C warmer and the sea level was 12 meters higher. What is uncertain is how long it will take and there are thousands of scientists working on that now. A lot of people want to know and each piece of evidence brings the date foreword.


1 Comment
David Smith
26/5/2016 11:27:29 am

Well, I beleive we've hit the 400 mark and we aren't 3 degrees warmer and sea levels aren't 12m higher.
It seems the alarmism was completely unwarranted. Ho hum!

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    Bob Bingham 

    Occasional blog posts on topical news items concerning the climate.  Please click the RSS feed to receive updates.

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