Each of these graphs from the IPCC policy summary shows the global surface temperature relative to a 1961-1990 arbitrary baseline. The upper graph shows the annual average, and thus captures a sense of variation reflecting a wide range of causes, but with a general trend from the early 20th century to the preset of increasing temperatures. The second graph shows the same data but using a decadal average. Notice that when you squint your eyes, turn your head sideways, and take some LSD you can see a highly significant decline, hiatus, pause, or even cooling in global temperatures that, if you've taken enough drugs, seems to obviate global warming. But if you look at the data by decade, even very strong mushrooms are not going to let you see what isn't there.

Global warming. Real. Deal.

Snow and ice, there's less of it.

Less snow, less ice. The drop in arctic ice cover each summer is catastrophic and the rate at which it has happened was not predicted. This is one of a handful of reasons that everybody I now in the climate science world regards the IPCC report as conservative, even optimistic. Nobody saw this coming. What else are we going to not see coming?

This is why we use the term climate change. Everywhere here you see a color, the climate changed. Blue means more wet, brown more dry. The IPCC report is somewhat equivocal on drought cause by climate change, but reasonably certain about rainfall shifts. This reflects, I think, the lag time of the IPCC process. The IPCC is somewhat current but not as current as it needs to be. Including the most recent data and most recent thinking, what the IPCC is very certain will happen over the next century with respect to drought and rainfall is very much happening right now.

Shifts is dry vs. wet conditions.

This is a complicated story but this graph summarizes it nicely. More CO2 in the atmosphere means more CO2 in the ocean, and this leads to acidification. That is a bad thing.

Ruh roh.

Most of the sea level rise over recent decades has been from the ocean getting warmer. But in the future expect the larger proportion to be from glaciers melting.

Warming, rising seas.

Here's the change in ocean surface pH:

Ocean Surface pH

It is getting hotter. It is getting wetter, or dryer, depending on where you are. And the big ice hat our planet wears is falling off.

Temperature, Rainfall, Sea Ice

I'm pretty sure the upper limit on this graph is going to be an underestimate. Mark my words. You can take that to the bank, but do pick a bank that is on top of a hill.

slr

It's hotter everywhere, except, like, Iceland.