Nature Communication Journal: AMO and PDO do not exist

[Kingarabian]

https://phys.org/news/2020-01-atlantic- ... noise.html

The Atlantic Multidecadal Oscillation (AMO) and the Pacific Decadal Oscillation (PDO) do not appear to exist, according to a team of meteorologists who believe this has implications for both the validity of previous studies attributing past trends to these hypothetical natural oscillations and for the prospects of decade-scale climate predictability.

The AMO is an important pre-season indicator for Atlantic hurricane activity while the same goes for the PDO and the EPAC.

I'm not sure if I agree with this journal. We've seen it in our own eyes when the PDO flipped warm in 2014, how gangbusters the EPAC became in regards to tropical activity. compared to when it was cool.

[AJC3]

https://phys.org/news/2020-01-atlantic-pacific-oscillations-lost-noise.html

The Atlantic Multidecadal Oscillation (AMO) and the Pacific Decadal Oscillation (PDO) do not appear to exist, according to a team of meteorologists who believe this has implications for both the validity of previous studies attributing past trends to these hypothetical natural oscillations and for the prospects of decade-scale climate predictability.

The AMO is an important pre-season indicator for Atlantic hurricane activity while the same goes for the PDO and the EPAC.

I'm not sure if I agree with this journal. We've seen it in our own eyes when the PDO flipped warm in 2014, how gangbusters the EPAC became in regards to tropical activity. compared to when it was cool.

I think the point he is making here is not that AMO- and PDO-type MODES (or states) do not exist, but that these modes may actually be resultant offshoots from other well-known, established oscillations (such as ENSO) rather than actual "oscillations" themselves with any sort of regular (re)occurrence/predictability.

Fascinating read that is already generating a HUGE buzz.