Posts by DrEvanGowan@fediscience.org
(DIR) Post #ATeXvDF1SOmxFs04FE by DrEvanGowan@fediscience.org
2023-03-15T14:46:20Z
0 likes, 1 repeats
@petergleick Twitter isn't worth it. The casual followers that made it worthwhile despite everything have already left, so the only people left are hardcores with large apparent followings, and trolls. This is how internet message boards in the first decade of the 2000s met their end.
(DIR) Post #AVH5uyFMR6qTNmVlaa by DrEvanGowan@fediscience.org
2023-05-03T09:18:12Z
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@ct_bergstrom The number one way to get cited is to write a paper describing information that is useful for other scientists. People need to get over these metrics. If you write an interesting paper, people will read it!It also helps to go to conferences and talk to your peers. People are more likely to know about your work if they know who you are. There is no magic. It is networking.Spamming is never going to make a good impression.
(DIR) Post #AXw9yYE8h3s7qgH46a by DrEvanGowan@fediscience.org
2023-07-22T01:25:46Z
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@clive I have been working on video game preservation for about 20 years, and I always say the biggest issue is the long duration of copyright law, which forces us into this situation where this is all technically illegal.
(DIR) Post #AXwQ2F4NSdjQrFUS4u by DrEvanGowan@fediscience.org
2023-07-22T03:45:08Z
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@gnemmi @clive That only really applies if you own a copy of the game. The issue at play that the Video Game History Foundation brings up is that the vast majority of games can no longer be purchased, and copyright law prevents the legal distribution of them, even for research (some countries like Japan do not even have fair use provisions).
(DIR) Post #AXwQ2FqEai0rFfsffk by DrEvanGowan@fediscience.org
2023-07-22T03:53:28Z
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@gnemmi @clive Then there is the issue with digital distribution, where ownership doesn't even apply. Once a digital distribution platform shuts down, the games might be lost forever. With the Satellaview, for instance, we buy random flash memory packs and hope that something is on them. Many aspects of that service cannot ever be preserved (unless Nintendo has the sound files saved). Some guy was uploading video recordings of it on YouTube, which were taken down due to copyright violations.
(DIR) Post #AY6nRmsZGxOqRpO1vU by DrEvanGowan@fediscience.org
2023-07-27T03:36:34Z
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The paper by Ditlevsen and Ditlevsen about the possible imminent collapse of the Atlantic Meridional Overturning Circulation (#AMOC) is getting a lot of attention, and for a good reason. As #PaleoClimate scientists, we look back to the past for analogues. The AMOC regularly collapsed during the last glacial period (~25 times). Barker and Knorr published a hypothesis that there was a sweet spot of CO₂ concentrations and Laurentide Ice Sheet size that made this possible. https://www.nature.com/articles/s41467-021-22388-6
(DIR) Post #AY6nRnl9zz4JB8vd1E by DrEvanGowan@fediscience.org
2023-07-27T03:38:46Z
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The size of the Laurentide Ice Sheet created feedbacks in terms of redirecting wind patterns and providing enough freshwater to cause AMOC to be unstable. The CO₂ levels changed in response to these changes, eventually pushing the climate to a state that would revive the AMOC.
(DIR) Post #AY6nRoVFEdvpU4UQqm by DrEvanGowan@fediscience.org
2023-07-27T03:41:41Z
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Another hypothesis that furthers this was published by Wickert et al earlier this year. In their hypothesis, the intermediate sized Laurentide Ice Sheet would retreat, producing large proglacial lakes that drain towards the Gulf of Mexico, providing the freshwater to shut down the AMOC. When the AMOC shut down, the ice sheet would then advance again. After a while, the lack of freshwater input would eventually revive the AMOC. The cycle would repeat once again. https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2022GL100391
(DIR) Post #AY6nRpEGXFwbjhYO1Y by DrEvanGowan@fediscience.org
2023-07-27T03:44:18Z
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This is a really nice hypothesis, because the Marine Isotope Stage 3 (MIS3, 55-27 thousand years ago) was an extended stadial period when the Laurentide Ice Sheet remained in an intermediate state. The AMOC regularly collapsed. It did not collapse again until the Younger Dryas when the ice sheet configuration was similar to the MIS 3 configuration. The orbital conditions in MIS 3 were unique for the past million years, and it is unlikely we will find anything else like that in the paleo record.
(DIR) Post #AY6nRq2FXPvWEiwIvw by DrEvanGowan@fediscience.org
2023-07-27T03:47:55Z
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Of course, as great as the paleoclimate record is, the rapid rise of CO₂ to levels exceeding 400 PPM has no past analogue. The mechanism for collapse will be completely different Although the indicators analyzed Ditlevsen and Ditlevsen point towards collapse, we may not know if the conditions are actually right for collapse until the collapse actually happens. If it does, past analogues suggest it can take well over 1000 years to recover. https://www.nature.com/articles/s41467-023-39810-w
(DIR) Post #AY6nRqjUwcWOOrAqLQ by DrEvanGowan@fediscience.org
2023-07-27T03:55:09Z
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Modelling AMOC collapse in climate models has not been easy. There is currently a proposal (which I was involved in developing) to compare models in idealized experiments during MIS 3 to attempt to figure out the thresholds the collapse. You can read about it in this paper. https://cp.copernicus.org/articles/19/915/2023/
(DIR) Post #AdBOzy3Ckdj3hhuDWy by DrEvanGowan@fediscience.org
2023-12-25T23:15:43Z
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@clive Most of this has a very lo-fi vibe to it. Very nice.