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David Kroodsma

@davidkroodsma.bsky.social
876 followers 248 following 68 posts

Chief Scientist, Global Fishing Watch. I lead a team that uses satellites and AI to reveal all major human activity at sea. globalfishingwatch.org

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David Kroodsma @davidkroodsma.bsky.social · 05/06/2025
🌊 I’m really enjoying the One Ocean Science Congress in Nice, France this week, in the lead-up to the UN Ocean Conference next week. If you’re in Nice and interested in using Global Fishing Watch data or tools, feel free to reach out!
lnkd.in
LinkedIn
This link will take you to a page that’s not on LinkedIn
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David Kroodsma @davidkroodsma.bsky.social · 20/05/2025
Just under one month left to apply for a grant through the Open Ocean Research Grant Program!
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David Kroodsma @davidkroodsma.bsky.social · 08/05/2025
🌊 Just launched: the Open Ocean Research Grant Program! We’re offering up to $10k for individuals and $20k for teams using our data to tackle key ocean research questions. Independent researchers & small teams welcome. 🔗 Apply: bit.ly/open-ocean-r... #OceanScience #Fisheries #ResearchFunding
bit.ly
Open Ocean Research Grants Program
This research grant program aims to enhance ocean governance by publicly sharing data on human activity at sea to grow our community of practice and expand and improve Global Fishing Watch datasets.
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David Kroodsma @davidkroodsma.bsky.social · 04/04/2025
A new paper said our fishing algorithm overestimates effort! academic.oup.com/icesjms/arti... However, it is based on how you interpret our algorithm. I think this paper interprets our algorithm incorrectly, but it may be our fault that we did not better communicate how to use our algorithm.
academic.oup.com
Bias in Global Fishing Watch AIS data analyses results in overestimate of Northeast Atlantic pelagic fishing impact
Abstract. The ability to pinpoint fishing activity in the world’s oceans has greatly improved over the past decades, a period in which both satellite-based
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David Kroodsma @davidkroodsma.bsky.social · 27/03/2025
We are now estimating carbon dioxide emissions from all vessels at sea! Learn more here: globalfishingwatch.org/article/mapp...
globalfishingwatch.org
Mapping industrial vessel emissions at sea
Pilot study first to estimate the greenhouse gas emissions of all large industrial vessels operating in the ocean
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David Kroodsma @davidkroodsma.bsky.social · 13/03/2025
We have just updated our public fishing activity data. You can now download data for 2012-2024! Learn more: globalfishingwatch.org/insights/ask... Here is fishing effort by latitude and day, across 12 years.
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David Kroodsma @davidkroodsma.bsky.social · 19/02/2025
Currently on a flight to Tokyo -- amazed to have wifi over the middle of the Pacific (even if it is slow). Looking forward to meetings in Tokyo, then Taiwan, then Korea, over the next eight days. Here's an image of fishing from AIS data in the region.
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David Kroodsma @davidkroodsma.bsky.social · 23/01/2025
One year of vessel traffic in the Arctic, animated with sea ice. www.youtube.com/watch?v=Sw_f...
youtube.com
arctic 2019 Apple Devices HD Best Quality
YouTube video by David Kroodsma
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David Kroodsma @davidkroodsma.bsky.social · 23/01/2025
Our paper in Annual Review of Marine Science, "Improving Ocean Management Using Insights from Space," is now open access: www.annualreviews.org/content/jour...
annualreviews.org
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David Kroodsma @davidkroodsma.bsky.social · 10/01/2025
Seeing friends and colleagues abandon their homes and flee the smoke and fire is bringing back painful memories of when we had to evacuate for the Caldor fire in 2021. It feels like no one is safe. Thinking of everyone in LA.
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David Kroodsma @davidkroodsma.bsky.social · 10/01/2025
And because very extra 0.1 degree of warming is worse than the one before it, it is actually more important, not less.
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David Kroodsma @davidkroodsma.bsky.social · 09/01/2025
We are currently trying to come up with a name for this new map projection. Any suggestions? Shown is vessel activity from AIS.
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David Kroodsma @davidkroodsma.bsky.social · 08/01/2025
If you follow us at Global Fishing Watch, be prepared to start seeing more maps with this projection :-). It is conceptually like Spilhaus, but with less distortion along the global coastline.
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Paul Woods @paulwoods.io · 07/01/2025
We are starting interviews for our new Senior Scientist, Head of Research Impact role. We have 105 candidates on the recruiting "short list", so this might take a while😅. Applications close tomorrow, so share if you know someone we should be talking to. job-boards.greenhouse.io/globalfishin...
GFW team photo, Panama 2024
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Paul Woods @paulwoods.io · 07/01/2025
Two weeks ago I said "hey we should use this crazy new map projection" and today there is python code! Showing here global vessel presence density (from AIS) using the spilhaus projection in a single view where you can see the whole ocean.
Global vessel presence map using Spilhaus projection
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Zeke Hausfather @zekehausfather.com · 06/01/2025
I have a new analysis over at The Climate Brink exploring how rates of warming have changed over the past century. Post-1970, GHGs (CO2, CH4, etc.) would have led to just under 0.2C per decade, but falling aerosols (SO2) have increased that rate to 0.25C. www.theclimatebrink....
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Paul Woods @paulwoods.io · 17/12/2024
Very happy with the work we are doing with @odihq.bsky.social to develop a robust data ethics practice to complement our use of AI, especially as we evolve to detecting smaller and smaller vessels. Read more in the ODI blog
buff.ly
Embedding data ethics at Global Fishing Watch
Learn more about our work with Global Fishing Watch.
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David Kroodsma @davidkroodsma.bsky.social · 03/01/2025
Today at Global Fishing Watch, on Slack, we are discussing the best map projections for showing off the ocean (this is partially us procrastinating). Our default is an equal earth projection. But some argue we should use the Spilhaus projection instead, which is how "fish see the world."
Spilhaus projection
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Tim @tim.hochberg.io · 02/01/2025
@paulwoods.io @davidkroodsma.bsky.social I played around with this over break and managed to map vessel presence in the Spilhaus projection. It really shows how little vessel traffic the southern oceans have. It's also a good candidate for a black light poster with this color scheme.
Map of the world's oceans in the Spilhaus projection showing vessel presence according to AIS between 2017 and 2021.  This projection has Antartica in the middle and most of the world's coastlines are projected onto the edges. The areas around Antartica and near the north pole are mostly empty, but the rest of the map has many vessel tracks.
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David Kroodsma @davidkroodsma.bsky.social · 20/12/2024
One of my resolutions for 2025 will be to share more of the maps we make at Global Fishing Watch. Here is all vessel traffic from AIS across five years. And if you want a 50 megabyte file of this image where you can zoom in to really high resolution, go here: drive.google.com/file/d/1RgBQ...
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David Kroodsma @davidkroodsma.bsky.social · 19/12/2024
Do you want to hear more about Global Fishing Watch Research? Sign up for our research newsletter: globalfishingwatch.org/stay-informe... Here is our latest newsletter, covering whale strikes, our new R package, recent publications, events, and the role we are hiring for mailchi.mp/globalfishin...
mailchi.mp
🐋 New in research: Global Fishing Watch data used for breakthrough study on whale-ship collisions
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David Kroodsma @davidkroodsma.bsky.social · 13/12/2024
10 years ago (!) I self-published a book about my climate-change-awareness-raising bicycle adventure across North and South America. Reflections on the adventure and the self-publishing journey: rideforclimate.com/blog/?p=1490
The Bicycle Diaries by David Kroodsma
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David Kroodsma @davidkroodsma.bsky.social · 08/12/2024
Scary article about how vulnerable our satellite-dependent way of life is: www.nytimes.com/interactive/...
nytimes.com
Opinion | The Warning
No shockwave. No mushroom cloud. But a space nuke would change life on Earth forever.
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Paul Woods @paulwoods.io · 07/12/2024
🚨🚨Job Alert!🚨🚨 #globalfishingwatch is on the lookout for a skilled Fisheries MCS Data Analyst to work alongside the Joint Analytical Cell (JAC) and global partners in our mission to combat Illegal, Unreported, and Unregulated (IUU) fishing. #job #careers #hiring
buff.ly
Job Application for Fisheries Analyst MCS-JAC at Global Fishing Watch
Background: Global Fishing Watch is an international, non-profit organization committed to advancing ocean governance through increased transparency. We create and publicly share knowledge about…
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David Kroodsma @davidkroodsma.bsky.social · 07/12/2024
What happens on this side of the world? It turns, a lot of fishing and shipping! Here's one year of fishing activity (yellow) and shipping (green) in the Pacific. This is Global Fishing Watch's data. bsky.app/profile/hank...
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Paul Woods @paulwoods.io · 06/12/2024
In addition to oil slicks, we will also use this satellite to find dark vessels that are trying to avoid being tracked thanks to ESA #remotesensing
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David Kroodsma @davidkroodsma.bsky.social · 06/12/2024
🚨🚨Job Alert!🚨🚨 We are looking for a senior scientist to help my team at Global Fishing Watch drive impact. This is an opportunity to build relationships that apply our technology to help make change. Please share! job-boards.greenhouse.io/globalfishin...
job-boards.greenhouse.io
Job Application for Senior Scientist, Head of Research Impact at Global Fishing Watch
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David Kroodsma @davidkroodsma.bsky.social · 06/12/2024
I really enjoyed this paper – the first global assessment of preferential access areas (PAAs), which are areas, usually along the coastline, where small-scale fishers are given preferential access to fish. Over 44 countries have PAAs! www.nature.com/articles/s44...
nature.com
A global assessment of preferential access areas for small-scale fisheries - npj Ocean Sustainability
npj Ocean Sustainability - A global assessment of preferential access areas for small-scale fisheries
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Paul Woods @paulwoods.io · 05/12/2024
A belated welcome to bluesky for GFWs new-ish head of strategic communications @sojoben.bsky.social !
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David Kroodsma @davidkroodsma.bsky.social · 05/12/2024
I was updating our bathymetry data with the latest global dataset (ETOPO 2022), and I couldn't help but make a few pretty maps. This was made using our Python library, github.com/GlobalFishin...
ETOPO 2022 bathymetry map, globally, at 50th of a degree
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David Kroodsma @davidkroodsma.bsky.social · 28/11/2024
Happy Thanksgiving! I’m enjoying sitting on the beach and reading The High Seas by @oliveheffernan.bsky.social — chapter 3 features Global Fishing Watch’s / @skytruth.bsky.social ‘s Bjorn Bergman!
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UBC Oceans @ubcoceans.bsky.social · 22/11/2024
WATCH: Did you miss our seminar on November 15? Dr. Rocio Joo from Global Fishing Watch discussed "Vessel movement analysis to investigate forced labor at sea." You can watch it now on #UBCOceans' channel: www.youtube.com/watch?v=acxy...
youtube.com
Vessel movement analysis to investigate forced labor at sea
YouTube video by UBC Institute for the Oceans and Fisheries
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David Kroodsma @davidkroodsma.bsky.social · 27/11/2024
Come work for us and my team! We are hiring a new senior scientist to help us drive impact from the Open Ocean Project (globalfishingwatch.org/open-ocean-p...).
globalfishingwatch.org
Open Ocean Project
Learn how our Open Ocean Project makes the invisible visible and transforms the way we view human industrial activity in the sea and protecting the ocean.
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The Conversation U.S. @us.theconversation.com · 21/11/2024
(1 of 5) Imagine you are a blue whale swimming up the California coast, as you do every spring. You are searching for krill in the Santa Barbara Channel, a zone that teems undersea life, but also vibrates with noise from ship traffic. Suddenly, the noise gets louder.
theconversation.com
New maps show high-risk zones for whale-ship collisions − vessel speed limits and rerouting can reduce the toll
Colliding with ships is a top cause of whale deaths. A new study maps the areas of highest risk, showing where proven strategies such as speed limits and new shipping routes can reduce the toll.
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Trevor A. Branch @trevorabranch.bsky.social · 21/11/2024
Global risk of ship strikes on whales, new paper in Science by Anna Nisi et al. [incl. me] www.washington.edu/news/2024/11... Paper: doi.org/10.1126/scie...
washington.edu
Fewer than 7% of global hotspots for whale-ship collisions have protection measures in place
A new study led by the University of Washington has for the first time quantified the risk for whale-ship collisions worldwide for four geographically widespread ocean giants that are threatened by...
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David Kroodsma @davidkroodsma.bsky.social · 21/11/2024
🚨🚨 New Paper 🚨🚨 In Science -- over 400k whale sightings combined with Global Fishing Watch data reveal how shipping traffic puts whales at risk across the global ocean. 🌊🐋 www.youtube.com/watch?v=Ilm_... www.science.org/doi/10.1126/... globalfishingwatch.org/news-story/g...
youtube.com
Research: Ship collision risk threatens whales across the world’s oceans
YouTube video by Global Fishing Watch
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David Kroodsma @davidkroodsma.bsky.social · 20/11/2024
How much more activity will @planetlabs.bsky.social let us see? Here's an example of Long Island. The first image is the vessels with AIS at the time of Planet Images. The second shows all the vessels that we can detect with Planet. Now we can truly map human activity in the ocean.
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Paul Woods @paulwoods.io · 20/11/2024
Global Fishing Watch just signed a new deal with Planet Labs that will allow us to detect small vessels on all of the world's coastlines every day. We are going to have a LOT of new data next year! #globalfishingwatch #planetlabs #remotesensing #earthobservation markets.ft.com/data/announc...
markets.ft.com
Planet and Global Fishing Watch Expand Collaboration for Ocean Transparency and Accountability – Company Announcement - FT.com
The latest company information, including net asset values, performance, holding & sectors weighting, changes in voting rights, and directors and dealings.
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Paul Woods @paulwoods.io · 20/11/2024
What would you do if you had detections of every boat larger than 10 meters every day in nearly all of the world’s coastal waters? And all the other structures that are out there too?
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David Kroodsma @davidkroodsma.bsky.social · 20/11/2024
Excited to join Bluesky! I loved the science discussion on the other site, and hope I can find something similar here. My research focuses on AI on satellite imagery and vessel GPS data to reveal human activity in the ocean (globalfishingwatch.org/research/). Follow to learn more!
globalfishingwatch.org
Research
Global Fishing Watch partners with leading scientific institutions to produce new open-source data and studies to help understand the most critical challenges facing our ocean
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