Climate scientist researching the ocean carbon cycle and marine carbon dioxide removal (mCDR). Professor of Oceanography at University of Hawaiʻi at Mānoa.; Visiting Faculty at School of Ocean Futures, Arizona State University; Founder, Bamboo Bike Project; co-founder, [C]Worthy.
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2026-07-25T03:45:05Z Event JSON
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Last Notes npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho Mainstream media in the US needs to broadcast this message to all voters. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho Unless someone has a genuine need, no car should be bigger than this. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho Speaking of acoustic bikes… npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho Wow, wheelchair bike. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho I'm sure this will be great for anyone who eats food. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho There’s a special place in hell for people like this: Homeowner called ICE on migrants working on her roof to avoid paying them. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho Some good news 🐳 npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho @nprofile…txg5 OMB has NSF practically on lockdown. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho I don't think people fully appreciate how apocalyptic things are for US science. I haven't received any new funding since 2024, but I'm still ok since grants are typically for 3 years. This means next year I will be completely out of funding and will have to fire everyone in the lab. It's not great. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho Lol npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho Not so marvelous news. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho Another way they want to steal the sky from us. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho Did CH₄ write this? npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho I’d rather live next to wind turbines and solar panels. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho The rain is insane right now in Honolulu. I cycled to work and I honestly don’t mind biking home in these conditions except I worry about getting killed by a car driver. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho @nprofile…75dj I've removed that. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho Find me here if you wish. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho The US-Israel war on Iran has emitted 5 million tonnes of CO₂ₑ in its first 14 days. The world currently has 0.6 million tonnes of novel and permanent CO₂ removal (CDR) capacity annually. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho To teleport one human would require ~6,000x the world's total energy supply and would take 4.85x10¹⁵ years (i.e., ~350,000 times longer than the universe has existed). npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho A bunch of us wrote (or cried, according to the NY Times) to ask her not to do this but to no avail. The letter is linked in the gift article. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho Oops! npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho I'm sure this is fine: A single TV company will serve 80% of American households. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho $200 billion could fund the National Science Foundation for 20 years. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho There are of course others but judges and journalists are keeping us in the game and while we can’t do much about the former, we can definitely support the latter. Stop complaining about paywalls and pay for news. Here’s a gift link btw. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho Lololololol. We’re governed by morons. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho Met a young Brit flying to LAX to take a road trip with friends through the American southwest for two weeks. He asked if I had any suggestions. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho A senior scientist spammed a mailing list of most of the scientists in my field with his latest paper in a predatory publisher's journal with nonexistent peer review. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho My strongly held belief is that the rapture isn’t real and people should stop trying to make it happen. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho Now that OpenAI, Anthropic, and Google are vying for our business, AI is probably as good as it will ever be for consumers. Once one of them emerges as the market leader and enshittification kicks in, it's going to really suck for everyone. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho If I told you that I’m drinking my neighbor’s wife’s milk, you’d think it’s pretty weird. We should feel the same way about drinking another animal’s milk. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho If he’s raising taxes on us, I’d like to know what we’re getting for it. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho I have stopped sleeping in the same room as my phone. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho @nprofile…dupy As an example, here’s a recent message I got from a fired colleague. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho @nprofile…dupy It’s a tiny fraction of the scientists working in the US. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho The brain drain from science in the US isn't to other countries, but from science to non-science (e.g., I know scientists driving for Uber). The one exception is that students and postdocs are choosing other countries over the US because of the lack of funding, the danger, and the uncertainty. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho If you're an environmental journalist in the UK or Europe, the biggest gathering of ocean scientists in the world is happening in Glasgow next week, and you should consider coming to cover some of the most important findings about our life support system. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho Lol npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho A 2025 study found that going car-free is the most effective way for individuals to lower their carbon footprint. To reduce car dependency, cities should focus on raising awareness about the benefits of car-free living, supporting compact cities through policy, and investing in public transportation, pedestrian and bicycle infrastructure, and shared mobility options. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho Please join this town hall at #OSM26 in Glasgow, moderated by @nprofile…0shf (Professor at UCL). npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho I know some of you who follow me mostly care about ocean or climate but this is one of the most alarming things happening and is worth your attention. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho “A car crash involving a pedestrian” is one of the dumbest things I read constantly in the news. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho “Hundreds of passengers were stranded at the airport in Gander, Newfoundland, waiting in vain for taxis, when suddenly residents pulled up in their own cars. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho When they found Ernest Shackleton's ship, the Endurance, remarkably intact in the Weddell Sea in the Antarctic over 100 years after its sinking, I joked on Twitter that this would be a good CO₂ removal technique. It was just a stupid joke. Intentionally sinking timber in the ocean is dumb. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho The US has some of the world’s best climate scientists (and certainly more of them than anywhere else) and has contributed disproportionately to understanding the climate system. It’s idiotic for the US to withdraw from the UN Framework Convention on Climate Change and the Intergovernmental Panel on Climate Change but it’s on brand for this regime. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho Cores from the Greenland ice sheet have provided important insights into abrupt climate change over the last 100,000 years and have enabled us to demonstrate human impacts on climate. But why the hell do we want to buy it? npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho Everything is a grift with this regime. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho This is a must read from Anne Applebaum. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho “…the Supreme Court has become deeply polarized in cases pitting the rich against the poor, with Republican appointees far more likely than Democratic ones to side with the wealthy. That is starkly different from the middle of the last century, when appointees of the two parties were statistically indistinguishable on this measure.” npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho According to the fine people at Shanghai Ranking Consultancy, University of Hawaiʻi at Mānoa Oceanography ranks no. 5 in the US and no. 7 worldwide. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho What could go wrong? 🤷🏻♂️ npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho As someone who often conducts fieldwork in remote places, I find it really irritating that many applications now require an internet connection to function. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho Good morning! npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho Mele Kalikimaka to all who celebrate. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho Rick Steves 😍 npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho My jacket has been leaking feathers because of a bike crash, so I brought it into Patagonia for repair. They said it would take 14 weeks and offered me a new jacket. I turned it down because the jacket was otherwise still perfectly good so I fixed the hole with a patch. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho They put the back on upside down! npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho What’s wrong with this chair? npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho Hype. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho Read this from Ben Santer (very famous climate scientist for those who don’t know) about what NCAR means and what dismantling it will do. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho China's massive deployment of clean technology allows it to have things we think of as the future, like flying taxis, delivery drones, battery swapping for EVs, high-speed rail, autonomous taxis, robot delivery trucks, and modern subways. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho I know many of you who follow me don't work in climate science, but this is the biggest story in climate right now. Breaking up NCAR makes us all less safe and is another act of self-harm that will take decades to recover from. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho Given all the insane things that the Trump regime has done, nothing should surprise us. But I’m still shocked and angry that they are going to dismantle NCAR. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho A true profile in courage to follow one’s conscience, especially in that system. Also amazing that the footage has surfaced. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho I’m a vegetarian but Shrimp Basket seems like a pretty awesome place. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho Turns out civilized people find symbols of hate to be potentially divisive. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho Hong Kong deserves much better than this. 🤬 npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho Phenomenal photos. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho The US government killed more than 23,000 beavers in 2024. 🥺 npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho Today in insanity: "Travelers visiting the United States from countries like Britain, France, Germany and South Korea could soon have to undergo a review of up to five years of their social media history, according to a proposal filed on Tuesday by U.S. Customs and Border Protection." npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho TIL that there are counterfeit bicycle frames and parts. 😬 npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho “Our analysis shows that in the aftermath of extreme weather events, lower-income neighbourhoods are less likely to rebuild and do not return to their pre-disaster state, whereas higher-income areas rebuild and tend to improve compared with their pre-disaster state, highlighting increasing disparities in their built environments.” npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho Deep sea mining is very bad for deep sea ecosystems. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho The impacts of this decrease in both the number and amount of NIH and NSF funding will be felt for generations, but props to the NIH and NSF program managers and support staff who got this many grants and this much funding out the door under very difficult circumstances. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho "Costco is suing the Trump administration over its tariffs, arguing that the White House has exceeded its executive authority in instituting tariffs and that it should be entitled to a refund if the tariffs are found unconstitutional." 👀 npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho The Hawaiian monk seal is one of two mammals endemic to the Hawaiian Islands. There are only ~1600 in the wild (i.e., fewer than pandas). Now they’re getting vaccinated against bird flu (H5N1). Get ready for autistic monk seals. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho I used to think that our current period in the geologic record would be marked by plastic, but now I wonder if it's PFAS. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho Turns out restaurants are a significant source of air pollution in London, due to emissions of biomass burning organic aerosol from the use of charcoal and wood as cooking fuel. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho The ocean remains the only true carbon sink. 🥲 npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho It’d be funny if this were in the Macy’s Thanksgiving Day Parade. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho The Trump regime wants to make us less healthy and more dead. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho Climate change + poor governance = deadly consequences npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho Fighting food waste seems like a good use of machine learning. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho Climate change is bad. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho Curious about people’s thoughts on this. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho Trying to organize a retirement gift for a colleague. Anyone have opinions about the Surly Disc Trucker as a touring bike? npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho If we don't rapidly phase out fossil fuels, we can say goodbye to coral reefs, the Greenland and Antarctic icesheets, and permafrost. The results will not be pretty. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho "For decades, zoos and circuses have been working with sanctuaries to give a better life to captive elephants, great apes, big cats and other land animals. The time has come for animal-protection organizations, marine parks, aquariums and governments to work together to retire whales and dolphins to sanctuaries and other more enriching environments where they can truly thrive." npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho The Trump regime’s cuts to NIH grants disrupted more than 380 clinical trials, affecting over 74,000 participants. The cuts disproportionately impacted trials on infectious diseases and minority communities. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho Immigration raids in Hawaiʻi are especially ironic since the Kingdom of Hawaiʻi was illegally overthrown and the Hawaiian Islands annexed by the United States against the will of the people. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho “The mainstream media has been strikingly incurious about the nature of Epstein’s geopolitical activity…[it] has in fact long participated in covering up the full scale of the Epstein story. The original cover-up was ignoring his sexual crimes. Those are now better reported. But by ignoring how integrated Epstein was with the American empire, these outlets are conducting another cover-up. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho Boeing is paying Charm Industrial to remove 100000 tonnes of CO₂ from the atmosphere, which is a time machine that takes us back by 1 minute and 15 seconds. 🥲 npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho They’re wasting our tax dollars npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho Come be my colleague at University of Hawaiʻi at Mānoa. We're hiring an assistant professor in Ocean Biogeochemical Modeling. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho There are things that shouldn't be in private control, and water is one of them. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho With current pledges, the world's on track for 2.6°C of warming in 2100 compared to preindustrial levels. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho The CIA conducted a covert program for over a decade to manipulate Afghanistan’s opium crop by airdropping specially modified poppy seeds. These seeds were designed to produce plants with minimal chemicals used to make heroin, aiming to degrade the crop’s potency over time. While the program was considered successful for a period, it ultimately failed to make a lasting impact on opium production in Afghanistan. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho It might be true that the world needs to remove ten billion tonnes of CO₂ from the atmosphere every year but it’s never going to happen for many different reasons: technical, financial, social, environmental, governance, etc. If we don’t reduce CO₂ emissions, we’re screwed. That’s it. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho NOAA cut funding to the Alaska Earthquake Center, directed by my friend Mike West. As a result, seismic monitoring by nine stations in Alaska tracking tsunami-causing earthquakes will go offline by the end of the month. This endangers people in Alaska, Hawaiʻi, and other parts of the Pacific. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho Cyclists should be able to treat a stop sign as a yield sign and a red light as a stop sign. npub15w7vk4kt2t9gnw644g8wzq3xv7s4320ldm5rq8jldhl99f2djwfstxenr5 David Ho ExxonMobil doesn't care about people and the climate because oil is simply too profitable.
