It Gets Rainier
17 hours ago Willis Eschenbach
Well, since I was on a roll with my last post Rainergy, I thought I’d look further at the Copernicus global rainfall dataset. I started by looking at the change in global rainfall over time.
Figure 1. Global monthly rainfall, 1979 – 2022.
Well, that’s interesting. Overall, despite endless hype about increasing floods, there’s no significant trend in rainfall. The main feature is the dropoff in rain from the 2016 peak. Being curious about that drop, I thought I might look at the hemispheres separately to see where it’s happening. Here’s that data:
Figure 2. CEEMD smooths, northern and southern hemisphere monthly rainfall
Zowie, sez I … do you see what I see?
The two hemispheres are basically mirror images! When one is wetter, the other is dryer, and vice versa. And as to why that would be, my only guess is that it’s from the very rainy Intertropical Convergence Zone (ITCZ) wandering above and below the Equator. Other than that, I fear I have no answer except for the quote below.
https://wattsupwiththat.com/2024/05/27/it-gets-rainier/
