Arkady
President
Through October, 2017 has been the third-warmest year since the NOAA data set started, back in 1880. 2015 and 2016 are the warmest, thanks to a very strong El Nino in the Winter between 2015 and 2016. But what has been alarming is how temperatures have not dropped back dramatically the way they typically do following strong El Ninos.
In 1998, the temperature anomaly was 0.63 degrees Celsius (the hottest on record, to that point), and the following year the anomaly dropped back to just 0.44 degrees Celsius -- a decline of 0.19 degrees. The last very strong El Nino before that was 1982-83, with an anomaly of 0.34. The next year, it dropped back to 0.18 -- a decrease of 0.16. This time around, the decrease has been from 0.98 degrees Celsius to 0.86 degrees Celsius -- a decline of just 0.12 degrees. So, although the post-El Nino cooling has given us a brief respite, as usual, this time the cooling has been diminished compared to what history would have led us to expect. Even our relatively "cool" years are alarmingly hot these days.

In 1998, the temperature anomaly was 0.63 degrees Celsius (the hottest on record, to that point), and the following year the anomaly dropped back to just 0.44 degrees Celsius -- a decline of 0.19 degrees. The last very strong El Nino before that was 1982-83, with an anomaly of 0.34. The next year, it dropped back to 0.18 -- a decrease of 0.16. This time around, the decrease has been from 0.98 degrees Celsius to 0.86 degrees Celsius -- a decline of just 0.12 degrees. So, although the post-El Nino cooling has given us a brief respite, as usual, this time the cooling has been diminished compared to what history would have led us to expect. Even our relatively "cool" years are alarmingly hot these days.
