Note a "null model" assumes the "null hypothesis" that climate change is natural and not forced by man-made CO2 or other alleged human influences.
GEOPHYSICAL RESEARCH LETTERS, VOL. 39, L23705, 5 PP., 2012
- I am using a novel method to test the significance of temperature trends
- In the Eurasian Arctic region only 17 stations show a significant trend
- I find that in Siberia the trend signal has not yet emerged
British Antarctic Survey, Natural Environment Research Council, Cambridge, UK