- Arctic ice cap grew 30% from 2007 to 2008.
- The sun can have a significant impact:
http://www.dailytech.com/article.aspx?newsid=12804
"30%" - see argument about trends below. August 2008 also saw the fastest melt of Arctic sea ice ever recorded.
Nobody denies that the sun affects climate. Neither does anyone assert that climate change is 100% caused by the sun, 100% caused by natural cycles, or 100% caused by man.
- Snow/ice depth in Greenland has been increasing several hundred meters over the last 60-70 years.
Source?
Much of the current scientific lit points toward ocean-terminating glaciers in Greenland losing more mass at faster rates. Snow or ice depth can also increase in one area, while ice loss increases faster in others still resulting in a net loss of ice.
Mass balance estimates have been trending to a net loss for the ice sheet for some decades now:
http://www.ipcc.ch/pdf/assessment-report/ar4/wg1/ar4-wg1-chapter4.pdf
- There's been no increase in global temperatures since 1998.
http://news.bbc.co.uk/2/hi/science/nature/7329799.stm
There's some evidence to suggest we're headed for a global cooling cycle... but I'm not convinced of that either.
Here's a basic fact: our planet is constantly in a state of change. Areas that, to us, have always been dry or wet... hot or cold... are by no means guaranteed to remain that way. This planet's climates have been changing long before we got here, and will continue changing long after we're gone.
Trends. Climate change is all about trends. Air temperature may increase for 50 yrs, decrease for 10, and then increase for another 20. 1998 was not only the hottest year of the 20th century, it was also an El Nino year. There wasn't a hotter year until 2005. How can you identify any sort of meaningful trend by picking 2 end points and isolating that data? Especially with data as variable as climate measurements, which come from myriad of sources like air, sea, ice, mud, pollen, tree rings? If you pick from 1998 to 2005, temperature went down. Start further and further back, and the overall increasing trend is shown.
Climate change does not claim man is the 100% driver. The best known drivers of glacial advance and retreat are the Milankovitch cycles, which are variations in Earth's orbit and axial tilt. We know from geological data how the cycles had affected climate during the past several glacial maximums and minimums; these are useful points and baselines to compare our current climate to. It doesn't matter if the earth was much hotter millions of years ago (which it was); we are concerned with the effects of a climate change on ourselves and the ecosystems of today which are vastly different than life on the planet millions of years ago.
Also the science says nothing about climate change being the end of man or civilization or anything like the rapture or 2012 theory. Climate change will be good for some people who get more rain for their crops, bad for others who get less rain, and bad for more who are displaced from low lying coastal areas as sea levels rise; it will be good for some species who gain an increased area of habitat and bad for others who lose out on habitat or have to compete with different species entering the habitat.