In article ,
Grippa wrote:

I wonder if some bright chap out there can wise me up. Is the increase
in CO2 caused by the release of this gas as the oceans warm up, or is
the increase in the temperature of the Oceans caused by the man made CO2.

No the CO2 warms the whole system which includes the ocean.

Incidentally, is it accurate to say that Greenland coastal waters which
are now tundra sustained a Viking grass based agrarian colony in the 4
century AD?
Greenland always had small coastal fringes that were green. Currently
there is a rapid warming. with glaciers shrinking though parts of the
interior are thickening due to increased snowfall.

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Regards from Bob Seago: http://www.users.zetnet.co.uk/rjseago/