stumbled across this interesting graph, based on ice core data
http://www.niwa.co.nz/__data/assets/ima ... imate1.gif
from the Niwa web page
http://www.niwa.co.nz/ncc/clivar/pastclimate
shows that CO2 levels and temperature have a close relationship
so as CO2 levels keep on rising as they have been lately, its not hard to come to the conlusion that temperatures wil keep rising as well
also check out the difference in temperature, i.e 6oC coler during the last ice age period
and yet global warming is only talking about half that change (in getting warmer), and yet people still dont think that is possible...and yet that is exactly what happened last time CO2 levels were as high (and were higher than now), far right side of the graph)
all global warming sceptics should be shown this graph me thinks
also the article shows that sea levels are slowly increasing in NZ
:
New Zealand has four tide gauges with records for 75 years or longer (Auckland, Wellington, Lyttelton and Dunedin). Hannah (1990) used these data to calculate a rising trend in sea level of 1.3, 1.7, 2.3 and 1.4 mm per year respectively, giving New Zealand a mean of 1.7 mm per year. An update by Hannah (2004) confirmed that sea levels around New Zealand have been rising at an average rate of 1.6mm/year over the last 100 years.
Note also that the El Niño Southern Oscillation (ENSO) is a significant source of seasonal and year-to-year variability in sea level. For example at Moturiki (Mt Maunganui), the seasonal and interannual variability account for about 30% and 25% respectively of the variation in non-tidal sea level (Bell and Goring, 1998). On the same NE coast during El Niño events, seasonal sea levels can be depressed by up to 10 cm (accompanied by a fall in shelf sea surface temperatures) while during La Niña phases, sea levels can be elevated by up to 8 cm (Bell and Goring, 1997).
also long term temperature is trending up....with up and down (to be expected) variations (we are in a down in that trend at the moment, the coming years should see the warming accelerate again (some people have latched on to the current slowing as saying , see, its not happening at all, but are missing the bigger picture):
http://www.niwa.co.nz/__data/assets/ima ... 007_v3.jpg