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Satellites reveal widespread decline in global lake water storage

science.org

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Re: Satellites reveal widespread decline in global lake water storage

#61
post #49
post #26

We're going to need a lot of desalination plants powered by clean energy.

IIRC These can have thier own host of problems because the 'brine' byproduct doesn't mix well back into the ocean and can settle/pool and create marine dead zones. Although suppose that will be less of a priority if people are thirsty.

Put them down stream of farm runoff so everything is already dead

Re: Satellites reveal widespread decline in global lake water storage

#62

Earlier quoted context omitted.

I mean, sure, but never in enough volumes to be actually usable by us. It’s not like we can capture every single evaporated water droplet before it cools to form fresh water. So while technically it happens all the time, practically it’s as if it isn’t happening at all when it comes to the concerns talked about here, specifically the quantity of available fresh water declining.

This is where essentially all freshwater comes from.

That’s great and all but how does that help with the issue of that freshwater being depleted? Which is the topic at hand.

Re: Satellites reveal widespread decline in global lake water storage

#63
post #38

Earlier quoted context omitted.

I think this might be just because their comment is borderline useless - it is so condensed that one can hardly make any sense of it. So what did they want to say? Is it "Science, it works?" like in XKCD comic #54? Or are the quotes around science the actually important thing, casting doubt on it? It's hard to tell because they did not bother to spend a few seconds to actually write it out. Beside that there is more…

The intention was to get people to read the main thesis critically. That quote is sort of a tell about the quality of this paper, and the more I dig into this paper the more it confirms this is isn't good science.

Your comments seem more skeptical than critical. Are you saying you believe lakes aren’t losing volume?

Re: Satellites reveal widespread decline in global lake water storage

#64
post #49
post #26

We're going to need a lot of desalination plants powered by clean energy.

IIRC These can have thier own host of problems because the 'brine' byproduct doesn't mix well back into the ocean and can settle/pool and create marine dead zones. Although suppose that will be less of a priority if people are thirsty.

Build cities from stabilized salt. Bricks, grout, pourable slabs.

Re: Satellites reveal widespread decline in global lake water storage

#65

Earlier quoted context omitted.

Global warming means generally more water in the air and more rain, not less. Think of Jurassic Park, not Mad Max

Yes, more total rain. A steady steam from the mountains is a much better source of water though to keep lakes, rivers and our water supply going. The rain isn't evenly distributed through both space and time. We might get a drought for years and then torrential rainfalls. We are already seeing this. It's happened in California and Germany. Both places I'm most tide to. So maybe it's sampling bias. At my parent's in G…

All over Europe, for sure. https://apnews.com/article/italy-floods-drought-59db3225a5d4...

Re: Satellites reveal widespread decline in global lake water storage

#66

Earlier quoted context omitted.

I think you are quite wrong about that. The evaporated ocean water becomes rain. Evaporated ocean water is the source of over 80% of all rain on earth.

And most of that rain is going to go into the ocean again. Or be distributed in a large area. Neither of which can really be captured in any sort of predictable and scalable manner. You know, unless we build a massive “roof” of devices to capture all that rain. Literally covering the entire planet. At that point yeah it would dev a reasonable thing to bring up in the context of fresh water reserves falling. So I very…

The rain can be captured by farms.

Re: Satellites reveal widespread decline in global lake water storage

#67
post #29
post #19

Earlier quoted context omitted.

Can somebody explain why is this downvoted? If 53% decline, what do the other 47% do? How about total storage?

This, and why 1992-2020? How many of these large lakes are distributed in say, Midwest America/Canada. What were the precipitation levels in that region just a few years prior? Why did they need to involve climate models when we have observable data?

Given the significant use of satellite data, I imagine the start point was chosen based on when some classes of data became available from recently launched satellites. An earlier time may not have sufficiently comparable data.

There's a map linked in the paper if you want to see where the lakes are: https://www.science.org/cms/10.1126/science.abo2812/asset/ab...

Re: Satellites reveal widespread decline in global lake water storage

#68
History may not repeat but it does rhyme. Harappan civ thought to have declined due to less water. Petra once thrived due to a system of dams, cisterns, and water conduits, but never-repaired damage after an earthquake and increasing aridity meant it less and less supported urbanism and so declined. The Soviets overexploited the Aral Sea which has yet to (and will likely never) recover. It is now spoiling the surrounding region with dust storms carrying with them pollutants from industry that settled in the drying lakebed. Owens Lake in California once fed LA, but when it dried up it too caused polluting dust storms. Gov't has not learned from this history. The western US's water rights are outdated to the point of creating utterly backwards incentives. For example, Utah has use-it-or-lose-it water rights and the lion's share of water in the Great Salt Lake's watershed gets used to grow alfalfa. Alfalfa itself isn't necessarily a bad choice if you're going to grow stuff in an arid region, the issue is more how much of it is grown and in a wasteful way (little to no drip irrigation and no incentive to start using it, instead farmers are incentivized to flood areas during times of heavy rainfall or risk losing water rights). However even city and residential water use (a much smaller %) is still per capita wasteful compared to nearby Vegas which has done a much better job of becoming efficient in its water use. Utah got lucky this year in its snowpack, potentially buying some time to change, but is that gonna happen? No, they're praying for moisture and thinking their prayers got answered. Any guesses how long it'll be before the Great Salt Lake becomes the US/capitalism's Aral Sea? 5 years, 10, 15? Any techies wanting to move out here might think twice, homes without water and with seasonal arsenic-laden dust clouds probably won't have much resale value.

Re: Satellites reveal widespread decline in global lake water storage

#70
post #61
post #49

Earlier quoted context omitted.

IIRC These can have thier own host of problems because the 'brine' byproduct doesn't mix well back into the ocean and can settle/pool and create marine dead zones. Although suppose that will be less of a priority if people are thirsty.

Put them down stream of farm runoff so everything is already dead

Farm runoff normally has the opposite effect, providing too many nutrients causing things like algal blooms.
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