Ken Johnson
Ocean scientist building a global biogeochemical sensor array to observe ocean health and changes in chemical cycling. http://soccom.org, https://go-bgc.org
- 🌊BGC-Argo float of the month is 5906497 with 4 years under Antarctic sea ice, just popped out. It was adopted by the American School in Jeddah, Saudi Arabia and named “Hedy Lamarr” – the actress who co-invented and patented frequency hopping communications. Named for her science contribution. 1/2
- Frequency hopping enables cell phone tech. Hedy Lamarr is in the National Inventors Hall of Fame and her Wikipedia page is en.wikipedia.org/wiki/Hedy_La... If you want to adopt an @globaloceanbgc.bsky.social float, see our web page. @bgc-argo.bsky.social @soccomproject.bsky.social
- Reposted by Ken Johnson[Not loaded yet]
- 🌊with the wave
- What's interesting as the Thanksgiving Holiday arrives? The first @bgc-argo.bsky.social profiling floats begin to emerge from under Antarctic sea ice each year. Float 5905383 is the first @soccomproject.bsky.social float for 2025/26. It has spent 7.9 years operating under ice. #argofloats #oneargo
- What's interesting as the Thanksgiving Holiday arrives? The first @bgc-argo.bsky.social profiling floats begin to emerge from under Antarctic sea ice each year. Float 5905383 is the first @soccomproject.bsky.social float for 2025/26. It has spent 7.9 years operating under ice. #argofloats #oneargo
- And I thought we made a lot of @bgc-argo.bsky.social profiling floats!!!! We're going to have to work harder. @globaloceanbgc.bsky.social @soccomproject.bsky.social
- 🌊BGC-Argo float of the month is a sensor, not a float. Bif and Johnson (GBC; doi/10.1029/2024GB008473) show that the concentration of nitrite can be extracted from the UV spectra of ISUS or SUNA nitrate sensors. But more.. @globaloceanbgc.bsky.social floats. @mbarinews.bsky.social
- Nitrite comes and goes (panel e), often following organic carbon export events (panel a). That’s consistent with exported organic carbon controlling heterotrophic processes that enable complete reduction of nitrate to N2, rather than accumulation of nitrite. But more interesting,
- Reposted by Ken JohnsonUsing robots and AI to unlock the secrets of a remote ocean with @soccomproject.bsky.social 🌊🤖🌊 Applying machine learning algorithms to a trove of data collected by robotic floats has improved estimates of ocean productivity and carbon export in the Southern Ocean: www.mbari.org/news/new-ai-...
- 🌊The Southern Ocean is warming, is productivity changing? New paper by Liniger et al. uses the nitrate sensors on 274 SOCCOM/BGC-Argo floats to compute annual NCP. It has increased significantly over the past two decades. @mbarinews.bsky.social @soccomproject.bsky.social @bgc-argo.bsky.social
- 🌊 BGC-Argo float of the month. The 300th float of the GO-BGC project was launched in the S Atlantic. Funded by the US NSF, these floats provide essential observations of ocean metabolism - productivity, oxygen, pH... @bgc-argo.bsky.social @globaloceanbgc.bsky.social #OneArgo #Argo
- 🌊Float of the Month. The BGC-Argo array in May 2025! With ships, it took decades to collect the data to visualize the chemistry and biology of the ocean interior. Now we can do it monthly, realtime, quality controlled. Access is easy with webODV. This is going to change things! #UNOC3 #OneArgo
- Reposted by Ken Johnson[Not loaded yet]
- Reposted by Ken Johnson[Not loaded yet]
- Reposted by Ken Johnson[Not loaded yet]
- Reposted by Ken Johnson[Not loaded yet]
- 🌊Float of the Month, 5906440 (@globaloceanbgc.bsky.social @bgc-argo.bsky.social). Drifting north for 4 years, it shows the evolution of the bio. response to ocean phys. At low latitudes, warm water does not mix deep enough (Mixed Layer Depth, black line on NO3 plot) to bring NO3 to the surface. 1/2
- Reposted by Ken Johnson[Not loaded yet]
- 🌊MBARIs @mbarinews.bsky.social new research vessel, R/V David Packard, has left Vigo Spain to come home. Its first science mission, deploy @bgc-argo.bsky.social floats across the Atlantic and up the Pacific. First O2 float in for @argogermany.bsky.social. More for @globaloceanbgc.bsky.social
- Reposted by Ken Johnson[Not loaded yet]
- 🌊🧪@bgc-argo.bsky.social Float of the Month. WMO 7900823 deployed nearly 80 south in the Ross Sea has done 2 years under ice. Here's the data plot (all data freely available @soccomproject.bsky.social). No bloom this year! Too much ice melt, no deep mixing, and no iron to feed plankton - IMO.
- It’s 10 days into the new year & @globaloceanbgc.bsky.social & @soccomproject.bsky.social have already deployed 10 new @bgc-argo.bsky.social profiling floats. 410 in the water, 70 with chem & 332 have chem/bio sensors - O2, pH, NO3, & bio-optics. They sample the upper 2 km every 10 days. 🌊⛴️🌡🧪
- Almost historical. I created the Periodic Table of Elements in the Ocean back in 1998 with my son, then age 14 who wrote the JavaScript, and daughter age 12 who chased down all references in the MLML library, to figure out how we could use the internet. Nice to see it in use. #mbari #globaloceanbgc
- 🌊 Forgot the wave
- Happy Holidays from the SOCCOM (soccom.princeton.edu) and GO-BGC (go-bgc.org) projects. The present under the tree? 115 BGC-Argo profiling floats deployed this year and more at sea. All data freely available. Thanks to all the folks who made this happen and the US NSF for their support.
- Happy Holidays from the SOCCOM (soccom.princeton.edu) and GO-BGC (go-bgc.org) projects. The present under the tree? 115 BGC-Argo profiling floats deployed this year and more at sea. All data freely available. Thanks to all the folks who made this happen and the US NSF for their support.
- This is the first in an occasional series on ‘older ocean science papers you should read’. Ever wonder why cans no longer have Pb soldered seams? In 1980, Settle and Patterson used methods developed to measure Pb in seawater and measured lead in canned tuna. In Science (tinyurl.com/y4z83z8j), 1/4
- Thank you Sonne. They are currently at sea on a Geotraces cruise in the Indian Ocean, Eric Achterberg Chief Sci. There are 7 GO-BGC (go-bgc.org) profiling floats on board and 3 already launched (7902123, -24, -25). We very much appreciate their help deploying floats.
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- 🌊@BGC-Argo, @GO_BGC float of the month 4903026. This is the first BGC-Solo II float, developed @scrippsocean.bsky.social. Deployed off Monterey Bay, it has made 375 vertical profiles, most to 2000 m at 1 to 3 day intervals (>10 years at 10 d cycles). The upper 300 m of the record is shown.
- 🌊@BGC-Argo, @GO_BGC float of the month 4903026. This is the first BGC-Solo II float, developed @scrippsocean.bsky.social. Deployed off Monterey Bay, it has made 375 vertical profiles, most to 2000 m at 1 to 3 day intervals (>10 years at 10 d cycles). The upper 300 m of the record is shown.
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- 🌊An awesome BGC-Argo paper in PNAS (doi.org/10.1073/pnas...) that does a global census of phytoplankton carbon. They conclude "Our study demonstrates that profiling robots enable more reliable monitoring of Earth’s phytoplankton, which is urgently needed to understand the impact of climate change."
- 🌊 Interested in ocean chlorophyll? A new paper by Long et al. rdcu.be/dXcjY explores the relationship between chloro, measured by BGC-Argo floats and by ocean color satellites. The figure shows seasonal maps of Chl_flt/Chl_sat. Systematic variations in the ratio are likely due to effects of Fe.
- @davidho.bsky.social @GO_BGC Glad to contribute. I used to do a "profiling float of the month" on that other app. Here's my first for Bluesky. Float WMO_5905380 is nearing its 8th year operating under seasonal ice in the Weddell Sea and just popped up, transmitting data from last winter.
