It is not just twice as fast, the pressure to keep rising the rate is still building up. CO2 emissions keeps piling up for centuries, more sea ice is permanently melting, permafrost is thawing at an increasing rate. Positive feedback loops are making that that heating twice as fast happen at shorter periods.

And over that, there are jumps to new higher baselines like with happened in the previous El Niño, and will happen in the incoming monster one.