5 ms·
Melting ice is slowing Earth's spin, shifting its axis and influencing its core
- deleted 2y ago[deleted]
- rapsey 2y agoBut has there actually been sea level rise? If the ice is melting where is the water?
- noselasd 2y agoYes. Have a look at e.g. https://www.climate.gov/news-features/understanding-climate/climate-change-global-sea-level https://www.climate.gov/news-features/understanding-climate/...
- 0xcafefood 2y agoIt's interesting to see a nearly linear trend as far back as the data goes (1880). Do you know of any sources to see how that trend might've looked going even further back in time?
- Retric 2y agoLinear? The rise is more than twice as much between 1980-2020 as 1880 to 1920.
- verdverm 2y agoMore specifically, 2.5 according to the post > The global mean water level in the ocean rose by 0.14 inches (3.6 millimeters) per year from 2006–2015, which was 2.5 times the average rate of 0.06 inches (1.4 millimeters) per year throughout most of the twentieth century.
- verdverm 2y agohttps://en.wikipedia.org/wiki/Past_sea_level https://en.wikipedia.org/wiki/Past_sea_level The ice age had a big impact on sea levels, estimates of 100m lower than it is today
- wongarsu 2y agoWell, 1880 is right after the industrial revolution. Unluckily we only started keeping good records after we kicked changes into a higher gear. This page has one graph that goes back further [1] (and a bunch of other interesting graphs). On geological scales we are at or near a high point [2] after the previous ice age 1: https://research.csiro.au/slrwavescoast/sea-level/sea-level-changes/ https://research.csiro.au/slrwavescoast/sea-level/sea-level-... 2: https://www.e-education.psu.edu/earth107/node/1506 https://www.e-education.psu.edu/earth107/node/1506
- FredPret 2y agoHave an industrial revolution -> get rich enough to care about science -> realize we should track the environment -> start to take measurements and writing them down. The only other path that leads to environmental tracking is if some order of monks developed an obscure interest in it in pre-industrial times.
- mattmanser 2y agoI firmly believe in climate change and global warming. I do have a question though. The graph presented starts in 1880 and rises linearly from then, with no correlation to a graph of CO2 levels, which had far more exponential growth between 1880 - 2010s, until recently. As I understand it, the mini-ice age finished in the 1800s. And started in the 14th century. So, is this actual evidence? There doesn't seem to be any visible acceleration from what was always happening pre-global warming. And can be blamed on the mini-ice age finishing. Most worryingly is that page, from scientists, doesn't even address that obvious objection. It briefly mentions sea levels have risen from the 1880s, but doesn't at all address that eyeballing the graph it seems quite obviously linear. Even more misleading is the graph someone else has linked which starts in the 1990s and doesn't show the rest of the data.
- teraflop 2y agoIf you try looking at the actual numbers or sketching rough tangent lines, you'll see that your "eyeballing" is misleading you. The graph is not at all linear -- the slope in recent decades is several times steeper than at the beginning of the time interval, as the accompanying caption says. Perhaps you're looking at the graph on a phone screen, which compresses the scale and de-exaggerates the changes?
- vel0city 2y agoZoom in and pan around. You'll notice it is not linear. Look at the slope of 1900 to 1950. Then look at the slope of 1970 to 2020. Are you telling me that's the same slope?
- Leszek 2y agoYes: https://www.weforum.org/agenda/2024/07/rising-sea-levels-global-threat https://www.weforum.org/agenda/2024/07/rising-sea-levels-glo...
- wongarsu 2y agoSo far a large portion of the ice melting is sea ice. Because that was already floating and thus displacing water it doesn't actually impact sea level. That's why people always talk about Greenland and Antarctica, two landmasses with huge amounts of ice on them (often kilometers deep). When their ice melts (and it is melting, just slower) you see notable changes in sea levels. This will also accelerate when there's less sea ice around the land keeping things cool
- stainablesteel 2y ago[flagged]
- practicemaths 2y agoHmmm I did not realize conservation of momentum was absolute hogwash. News to me.
- AnimalMuppet 2y agoNo, no, no. This is conservation of angular momentum. Completely different. /s
- pixxel 2y agoIt’s good to learn.
- stainablesteel 2y agoin space? in a vacuum? being affected by literally 0.0001% of all mass of the rotating body?
- practicemaths 2y agoShort video lesson for you: https://youtu.be/M6PuutIm5h4?si=RmUV7D74DYfPoY2l https://youtu.be/M6PuutIm5h4?si=RmUV7D74DYfPoY2l
- stainablesteel 2y agothat's not a sphere, those hammers are changing distance to his core by more than 50% of the total distance, ice caps on earth do not reach the same % difference in height completely irrelevant video
- practicemaths 2y agoYou really need to go back to school.
- josefritzishere 2y agoIs that as scary as it sounds?
- self_awareness 2y agoProbably not.
- silverquiet 2y agoWe can measure tiny increments of time to see really small effects on the Earth; it's a testament to how good a lot of our instruments are really. What's scary to me is that the carbon content of the very air we breathe has increased by a third since the time when my mother was a child. That's hardly a small thing.
- Andrex 2y agoThat can't be a universal increase, can it? I've been worried about smog, didn't think to track carbon penetration over the last few decades...
- silverquiet 2y agoThe world over; humanity has put more carbon into the air by weight than the total sum of all that we've built on the surface, and it's still accelerating. It's a rather awesome testament to humanity, but not exactly in the positive sense given that the externalities are beginning to bite.
- exe34 2y ago[flagged]
- FredPret 2y agoThis is hardly accurate. It's the global poor who are most impacted by a (hypothetical) slowing economy. Sure, some billionaire won't get that third yacht. But it's the several hundred million women in Africa doing their family's laundry by hand who suffer much more, by far. What we need is oodles of economic growth, in as green a way as possible. AKA, solar, batteries, nuclear, and so on. And what that means is more and better tech, more and better deployment of capital.
- spacecadet 2y agoArticles about this reference a research paper, but I cannot find it. Anyone have a link? Also, doesnt this happen from almost anything happening on earth? say a mud slide, or volcano eruption? A sports stadium doing the wave?
- toastedwedge 2y agoI'm not a scientist, but these may be it as they relate to the same topic with the same (or mostly) authors, and were published the week of TFA: https://www.pnas.org/doi/10.1073/pnas.2406930121 https://www.pnas.org/doi/10.1073/pnas.2406930121 https://www.nature.com/articles/s41561-024-01478-2 https://www.nature.com/articles/s41561-024-01478-2 I do wish articles would link to these studies instead of just talking about them.