C, the warmest on record.* The warmest year on record is 1998, which reached 14.52 ??C, was a year dominated by an extreme El Ni??o* Over the ten years, 2000???2009, since the Met Office has issued forecasts of annual global temperature, the mean value of the forecast error is 0.06 ??C.* Interannual variations of global surface temperature are strongly affected by the warming influences of El Ni??