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Show HN: 41 years sea surface temperature anomalies
- Gravityloss 6mo agoAwesome! Maybe there could be even larger speeds and timesteps.
- mcluck 6mo agoThis was my first thought. I'd like to see it running at like 10x or more to better grasp the change over time
- imagetic 6mo agoMore of this!
- zug_zug 6mo agoVery emotionally powerful to watch something play out, even if I'm already consciously aware of it. Would love a speed where I can watch the whole dataset play out in about 1 minute.
- jstanley 6mo agoWhat are we seeing play out? It just looks like some areas are warm and some are cold?
- iso1631 6mo agoI can't believe there are still so-called intellegent people coming out with this crap. 1985 sure. Maybe 2000 But now?
- Johnny_Bonk 6mo ago[flagged]
- rob_c 6mo agoI'll give you 2 reasons. a) published data tends to see corrections from sensors and methodology which take several years to work out the fine details. (This isn't an attack this is science) Which means always take yesterday's numbers with more scepticism than 2yr ago. (This is making no statement of any data you're looking at or any trend you claim to see) b) a field dominated by modelling needs data to back it up, otherwise the conversation would be, "Why is the LHC failing to find strong theory which is absolutely there" vs "I wonder if the modelling is correct based on..." This is a certain level of maturity that certain sciences are only starting to reach after playing in the ballpark of "let's go model my idea and make a press release which will just so happen to help my funding". Yes sea level temps are rising, absolute numbers are still difficult to come by though and last UN summary doc I read still put things at 5C global average over a century. (Yes still horrifically catastrophic for the wrong people, but I'm also not in charge)
- zug_zug 6mo agoI doubt it has anything to do with data-quality, I'd be surprised if even 10% of climate denialists have studied the numbers. Remember >20% of US citizens are still creationists, a lot of people aren't emotionally ready to believe scary things, and maybe they never will be.
- rob_c 6mo agoAnd believing the world ending as in "the day after tomorrow" was the "still mask wearing" of the 2010s. Fear.
- zug_zug 6mo agoFeels like a really weak bad-faith take. I guess you're trying to draw a false-equivalency between taking a problem extra seriously and denying/perpetuating it? However taking a problem too seriously doesn't harm people, if you want to wear a mask out of an abundance of caution you won't kill anybody else. Also nobody believed the world was going to end in two days, that feels like a disingenuous talking point. If somebody literally believed the world would end in < 10 years they'd likely quit their job, spend all their savings, etc. If your point is that you've met ~15 individuals in your life who were obnoxious/self-righteous/unlikeable about their attempts to make the world better -- congrats every movement has that. But it can't distract from the fact that one thing is true and the other is false, and anybody who tries to focus more on the stereotypes of the individuals in a movement than whether it's true or not is only creating noise.
- deleted 6mo ago[deleted]
- jstanley 6mo agoI think you may be reading more into my comment than I wrote. I was only talking about what we are seeing in the Show HN. I have no baseline to compare it to so all I can see is a map of the oceans with some areas red and some areas blue.
- iso1631 6mo agoAnd over time the volume of blue reduces and changes to red, and even deeper red appears It's generally accepted that red = hot and blue = cold, and there is a scale showing that anyway It's quite obvious based solely on the site that this shows surface sea temperatures over 40 years, and it's far higher now than it was 40 years ago But sure, just go on the "I'm only asking questions" crap.
- drc500free 6mo agoIf you tap the images on mobile, there is an animation.
- rexpop 6mo ago[dead]
- HumblyTossed 6mo agoWe're frogs, slowly boiling ourselves...
- OhMeadhbh 6mo agoTurns out frogs are smarter than humans .. https://pmc.ncbi.nlm.nih.gov/articles/PMC534568/ https://pmc.ncbi.nlm.nih.gov/articles/PMC534568/
- callumprentice 6mo agoI made something like this (in the VERY broadest sense) 10 years ago - inspired me to revisit and update both visuals and data (a lot has changed in that time). https://callumprentice.github.io/apps/global_temperature_change_webgl/index.html https://callumprentice.github.io/apps/global_temperature_cha... and https://callumprentice.github.io/apps/climate_temperature_change/index.html https://callumprentice.github.io/apps/climate_temperature_ch...
- mckirk 6mo agoAlong these lines: I really like the 'Climate Reanalyzer' project by the Climate Change Institute at the University of Maine [1]. There's so much good stuff there if you click around a bit; you can create custom plots for the surface temperature of different regions for example[2], which quickly shows you that Western Europe has actually warmed a lot more than the global average, and we're closer to +2°C already in that region. [1]: https://climatereanalyzer.org/clim/sst_daily/?dm_id=world2 https://climatereanalyzer.org/clim/sst_daily/?dm_id=world2 [2]: https://climatereanalyzer.org/research_tools/monthly_tseries/ https://climatereanalyzer.org/research_tools/monthly_tseries...
- Scarblac 6mo agoIn general I think the sea warms slower than land, so you'd expect land everywhere to warm faster than the global average.
- engineer_22 6mo agohttps://climatereanalyzer.org/research_tools/monthly_tseries/ https://climatereanalyzer.org/research_tools/monthly_tseries... What changed in 1979?
- interloxia 6mo agoI don't know but it cooencideds with the start of satellite monitoring. Half a century of satellite remote sensing of sea-surface temperature (2019) https://www.sciencedirect.com/science/article/pii/S0034425719303852 https://www.sciencedirect.com/science/article/pii/S003442571... I haven't looked but there will probably be references somewhere explaining the dat sources.
- Windchaser 6mo agoProbably just an El Nino / La Nina oscillation. Looks similar to the changes leading up to 1998 (another big El Nino), 2016 (same), and 2024. More glibly: "the temperature"
- engineer_22 6mo ago
- cjauvin 6mo agoFor those interested in this type of climate data visualization apps, I have worked on this one in the past, which is actively maintained with a lot of love, and very nice: https://portraits.ouranos.ca/en https://portraits.ouranos.ca/en
- rob_c 6mo agoSerious question. Why are there static (in absolute positional terms) anomalies in the data that seem to be recording at the other end of the spectrum to their immediate surrounding waters? Also nice to see several shipping lanes crop up when watching it.
- illwrks 6mo agoVery nice. I had a quick look at the data source and I wonder if the more recent data is more sensitive/better quality since 2020? There's a clear trend of the oceans getting warmer but recently it seems like there's more and more heat retained. "CRW's first-generation global monitoring products were operational at NOAA until April 30, 2020, when they were officially retired, and succeeded by CRW's next-generation operational daily monitoring products."
- bkor 6mo agoAs said by someone else, the temperature of the oceans rose significantly more after the low sulphur regulation went into effect. See https://www.imo.org/en/mediacentre/hottopics/pages/sulphur-2020.aspx https://www.imo.org/en/mediacentre/hottopics/pages/sulphur-2... for the regulation.
- ferfumarma 6mo agoThis is all terrifying data.
- pstuart 6mo agoMade worse that there's a significant number of people who refuse to believe it, and for all the wrong reasons at that.
- lp4v4n 6mo agoGlobal warming doesn't exist. If it does, it's not that bad. If it gets bad, it's not a big deal in reality. If it becomes a big deal, it was not humanity's fault. And if it was humanity's fault, at least the planet was saved from a global dictatorship run by scientists.
- metalman 6mo agoThe OG, SST https://www.ospo.noaa.gov/products/ocean/sst/contour/ https://www.ospo.noaa.gov/products/ocean/sst/contour/
- pimlottc 6mo agoThis looks cool but it's missing a clear legend on the default view to help the viewer understand what they're looking at. It's not immediately clear if it's just absolute temperatures or relative temperatures or what. You have to look at the color scale to notice that it's from -5 to +5. But relative to what? Over what timescale? Is it a moving average? I guess I could dig into the data link to figure it out but most people aren't going to do that.
- adcent 6mo agoI jumped to my birth date and found it's much colder than today.
- croemer 6mo agoIn case you wonder how the anomaly is calculated: The daily global 5km SSTA product requires a daily climatology to calculate the daily SST anomalies. Daily climatologies (DC) are derived from the monthly mean (MM) climatology via linear interpolation. To achieve this, we assigned the MM value to the 15th day of each corresponding month, with the individual days between these dates being derived using linear interpolation. We then calculate the SSTA product using: SST_anomaly = SST - DC where the SST is the value for the day in question, and DC is the corresponding daily climatology for that day of the year.
- marginalx 6mo agoThis doesn't give me a clear idea as a layman on how to interpret this information. Is it ok for the layman to believe that may 1st 1985 the variations of -5 to 5 were around 86 mean but in 2025 the same were around 82 mean, if that were to be the case, irrespective of the variations, it would not give me an idea of whether its concerning or not (this is just a random example, don't read too much into my beliefs)
- fedorsapronov 6mo ago[dead]
- marginalx 6mo agoI don't quite understand the temperature color scale of -5 to 5, what is the baseline here on -5 to 5, is it relative to global average of that day? Or a period of time?
- mc-serious 6mo ago[flagged]
- simonebrunozzi 6mo ago[dead]
- kittikitti 6mo agoThis is great, thank you for posting this!