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China Science

Beijing Reports Heaviest Rain in 140 Years (theguardian.com) 56

Rains that pummelled Beijing in recent days were the heaviest since records began 140 years ago, the city's weather service has said, as China faced accusations that it had undermined key climate talks with other countries. From a report: Storm Doksuri, a former super typhoon, swept northwards over China after hitting southern Fujian province last week, following its battering of the Philippines. The average rainfall for the entire month of July was dumped on Beijing in just 40 hours, with heavy rains pummelling the capital and surrounding areas since Saturday.

"The maximum [amount] of rainfall recorded during this storm, which was 744.8 millimetres, occurred at the Wangjiayuan reservoir in Changping," the Beijing Meteorological Service said, adding it was the "heaviest rainfall in 140 years." The extreme weather comes as China's foreign ministry denied reports that it obstructed discussions on tackling climate change at G20 meetings in India last week, calling the accusations "completely inconsistent with the facts."

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Beijing Reports Heaviest Rain in 140 Years

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  • More (Score:4, Funny)

    by ThurstonMoore ( 605470 ) on Wednesday August 02, 2023 @02:22PM (#63734936)

    Maybe they should burn some more coal and see if that helps.

    • Re:More (Score:4, Interesting)

      by DrMrLordX ( 559371 ) on Wednesday August 02, 2023 @02:35PM (#63734964)

      Speaking of which: does China still have the infamous brown clouds hanging over Beijing (and other populated segments of the country) like they did a few years ago? Perhaps all this rain can wash most of the particulate out of the air?

      Kinda makes you wonder how dirty that rain is by the time it hits the ground.

      • by _merlin ( 160982 )

        A lot of that is dust. Beijing is built in a depression that causes particulates to accumulate in the air naturally. Dust blows in from the Gobi Desert and just hangs over the city like a cloud. On top of that, deforestation in the surrounding areas means more dust gets blown into the air to accumulate there. The rain will bring some of it down, but it'll be back very quickly.

      • by AmiMoJo ( 196126 )

        Beijing does not. They cleaned it up some years ago, just banned all the highly polluting burners one day.

        They also build massive new mass transit systems. In a decade they dug more metro lines than the rest of the world has combined. Moving hundreds of millions of journeys every day to electric underground trains really helped.

        It's still not ideal, and some other cities have issues like Shanghai. It is improving though, as the government clamps down on polluters. The rivers are getting better too, and ther

  • OMG they could use that to make nukes.

  • by w3woody ( 44457 ) on Wednesday August 02, 2023 @02:48PM (#63735012) Homepage

    I honestly wonder how much came from the Tonga volcanic eruption last year [npr.org] which reportedly dumped a "massive amount of water vapor" into the atmosphere? According to that article, it claimed that it could "take 5-10 years to fully dissipate."

    The paper The Hunga Tonga-Hunga Ha'apai Hydration of the Stratosphere [wiley.com] suggested that the one eruption added 10% to the amount of water vapor that typically resides in the stratosphere, and may contribute to global warming as water vapor contributes to greenhouse warming.

    • Geological effects - even those for things like volcanic activity - are baked in to the climate. They might fluctuate in intensity and frequency, but overall they form a normal part of the maintained ecosystem. The idea that one event - even a big one - somehow dwarfs anything that man might introduce is misguided. The climate is the combination of all factors, and they include eruptions. You might have a short term change with a large enough event, but for the whole planet to more or less uniformly warm up

      • The idea that geologic events can cause temporary and localized shifts in climate is not misguided.

        • I don't disagree with you. But "Temporary and localized" effects are not really climate - even local climate. They're the equivalent of weather.

    • by Geoffrey.landis ( 926948 ) on Wednesday August 02, 2023 @04:03PM (#63735242) Homepage

      I honestly wonder how much came from the Tonga volcanic eruption last year [npr.org] which reportedly dumped a "massive amount of water vapor" into the atmosphere?

      Pretty much none of it. The Tonga eruption may have put 10% more water vapor into the stratosphere than the amount that's usually there, but that's significant only because there's not much water vapor in the stratosphere. 150 million tons of water vapor sounds like a lot, but given that the surface area of the earth is 500 million square kilometers, even if it all rained out in one rainstorm (and it doesn't; it takes a long time for water vapor to filter down from the stratosphere to the troposphere) it would only deposit 0.03 mm of rain.

      According to that article, it claimed that it could "take 5-10 years to fully dissipate."

      OK, so drop that to 0.03 mm per five to ten years.

  • by oumuamua ( 6173784 ) on Wednesday August 02, 2023 @03:01PM (#63735048)
    But you’re not gonna like how!
    By using cheap Chinese designed Hualong Nuclear Power Plants https://www.bloomberg.com/news... [bloomberg.com]
    Pakistan Karachi cost $2.7 billion for 1.1 Gigawatts make this cheaper than solar when you account for capacity factor.Solar costs about $1billion per Gigawatt with 25% capacity depending on latitude https://coldwellsolar.com/comm... [coldwellsolar.com]
    Solar 25% capacity factor: https://www.eia.gov/todayinene... [eia.gov]
    Pakistan has commissioned another reactor at Chasnupp this time to cost $4.8 billion for 1.2 GW . Even at this higher price it still beats solar https://www.powermag.com/pakis... [powermag.com]
    • If they work, and work well, buy them. It's better than buying a million cheap air conditioning units from them and compounding the problem.

  • by dsgrntlxmply ( 610492 ) on Wednesday August 02, 2023 @03:22PM (#63735114)
    Stays mainly in Changping.
  • You can't fight the weather, you will lose.
  • by PCM2 ( 4486 ) on Wednesday August 02, 2023 @05:09PM (#63735500) Homepage

    This article talks a lot about how the rains have slammed China but has but a one-off line about "Beijing's ancient drainage systems." Cities all over China are built the cheapest way possible, and creating a decent drainage system has been one of the least important considerations in the march to "modernization." I'm not gonna pretend Katrina gave the US much standing to point the finger, but from the reports I've heard, these storms in China aren't just causing unmanageable flooding, but the crappy, cost-cutting construction methods they use also mean things like overpasses and building roofs are collapsing under the weight of the water.

    • I'd guess you're listening to biased reports. Where I live in Beijing, they're handling the flood really well, so it's an exceptional situation. There are low quality construction of course, as anywhere, but don't think they're not improving significantly, like most things in China.

    • Re: (Score:3, Insightful)

      There's 3 factors involved:

      • 1) How much rain falls in what timespan.
      • 2) How well drainage systems handle that.
      • 3) How much water can be stored on-site (or nearby), and for how long. Read: water seeping directly into the soil, stored & slowly released afterwards. Or caught in reservoirs or rainwater harvesting systems.

      That last factor tends to be overlooked, but can have dramatic effect on how severe flooding events are. Most cities have every m^2 paved, routing any rainfall to drainage systems. R

  • Beijing is filthy at the best of times. This should clean it up. Now, letâ(TM)s see a lot like that hit India and esp. letâ(TM)s get some of that in America and clean up our cities. A number them are as dirty as Beijing .

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