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U.S. has its wettest 12 months on record again

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31–40 of 150 posts

Re: U.S. has its wettest 12 months on record again

#31
post #15

I wonder if this will help to refill some of the depleted aquifers.

Yes, its about the only thing floods are good for.

No, floods just wash by, eroding top soil and often decreasing future aquifer replenishment because there is less to hold on to the water to give it time to soak down into the aquifer.

Re: U.S. has its wettest 12 months on record again

#32
post #15

I wonder if this will help to refill some of the depleted aquifers.

Last October in Austin, there was a bitter irony: after heavy rains, the systems for filtering the water were overloaded and they put out a warning that water wasn't safe to drink (though fine for other purposes).

"Water, water, everywhere, but not a drop to drink."

Story about it:

https://patch.com/texas/downtownaustin/austin-water-safe-dri...

Re: U.S. has its wettest 12 months on record again

#33
post #2

Global climate change => higher air temperatures => more water in the air => more water available to fall out of the air.

Its not that I disagree, I just want to point out this never explains what was going on the last time the records were hit and by proxy a snapshot of the current record

This record was set at the end of June 2019. The last time this record was set was May 2019. The time before that? You guessed it. April 2019.

I'm willing to wager it's the same thing going on as "last time."

Re: U.S. has its wettest 12 months on record again

#34
post #19

Earlier quoted context omitted.

Are some predicting a mini ice age as opposed to warming? A mini ice age worries me more than warming.

Yeah - https://www.iflscience.com/environment/we-could-be-heading-m...

It's weird that they call it "mini ice age" then follow up with - we had one in 17th century, London got temperature below 0 in winter. Not what I imagine from the name.

Re: U.S. has its wettest 12 months on record again

#36
post #2

Global climate change => higher air temperatures => more water in the air => more water available to fall out of the air.

Yup, pretty much exactly.

The interesting side effects are the formation of more clouds (in the stratosphere they make things warmer, in the troposphere they make things colder), and bigger temperature shifts in the air when the water finally condenses out in liquid form (more mass to phase change, more net temperature change).

Re: U.S. has its wettest 12 months on record again

#37
post #4
post #2

Global climate change => higher air temperatures => more water in the air => more water available to fall out of the air.

The most powerful supercomputers in the world are focused on weather analysis and they can only project a few days out. Yet, some people think they've got it figured out.

I present to you a person who thinks that because we can't tell for certain that it's going to rain next Wednesday, we're have no idea if next summer will be hotter than next winter.

Re: U.S. has its wettest 12 months on record again

#38
post #21

Earlier quoted context omitted.

The widespread willful ignorance about the differences between modeling weather and climate was amusing to me 20 years ago. But the joke is long past its sell-by date. No, we can't predict whether it will rain on this day in August in Augusta Georgia. Detailed forecasts will probably never get a lot better a month out. But we can predict that December 2019 will be colder than August 2019 across most of the USA, and t…

Not really. The delta in how data is collected in August and December is much smaller than 1980 to 2020. So such determinations aren’t as straightforward as you imply. Not to mention none of the catastrophic climate consequences predicted in 1980 came to pass, but somehow we are supposed to be so much more certain about the prognosticators of today.

Which predicted catastrophes? The only one I remember is the ozone layer issue which we stopped with regulation and still pay the price (although it's getting better)

Re: U.S. has its wettest 12 months on record again

#39
post #26

Earlier quoted context omitted.

Not to mention we have an extremely limited data set to work from when identifying what “normal” is.

We're not talking about vague shifting definitions of "normal." We're talking about "the wettest 12 months ever recorded," in the 125 years we have data for.

125 years is still a very small amount of time to assess climate, and the quality of the data 125 years ago isn’t very good. Considering all “solutions” to the “problem” of climate change involve a radical remaking of society, it’s not unreasonable or unserious to ask for more data.

Re: U.S. has its wettest 12 months on record again

#40
post #7
post #2

Global climate change => higher air temperatures => more water in the air => more water available to fall out of the air.

Should we expect dry (arid) regions around the world to experience more rainfall?

That depends on the region. As a well-known example, rainfall in California will decrease.

Here is an explanation. Take a pot of water. Heat one side. The water will start to circulate, come up where it is hot, fall where it is not, then cycle back.

The Earth's atmosphere does that as well. It rises in the tropics, spreads out, falls in temperate zones, then comes in. These circulation patterns are called the Hadley cells. They explain a lot of things. For example air that came from the equator, then spread out, is moving faster than the ground below it. That's the jet stream. And where it falls it is still moving. That sets up the prevailing wind on land, and the trade winds at sea.

One thing that they help explain is where things are dry. You see when air rises, the water falls out. So where air comes down, it is dry. Therefore the latitudes where it falls have lots of deserts.

Now one of the effects of global warming is that the Hadley cells get less stable, and also expand. Which means that arid zones in Mexico move north, and the Southern USA gets drier. But this comes with more instability in weather patterns.

So you see, it is complicated. Overall wetter does not mean wetter where you are...

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