Or perhaps some other measure that would show any rate of change of the trend. (realclimate.org)
The rate of change of the trend - line will likely become negative within the next 20 years, reaching the lowest global mean trend - line temperature in almost 40 years. (wattsupwiththat.com)
Dr. Gavin Schmidt, director of NASA's Goddard Institute of Space Studies, tweeted last week «Is there evidence that there is a significant change of trend from 1998? (thinkprogress.org)