Last year the world was 0.62 C hotter than the 20th Century average (13.9°C) – that already includes part of the warming since preindustrial times. According to the leading NASA GISS dataset
1998 [Oops. No. That would in fact be 2009] ranks third. [And 2007 fourth.] All other hottest years in the top 10 are from the 21st Century [supplemented with 1998].
We can only conclude the trend line continues.
© Rolf Schuttenhelm | www.bitsofscience.org