Dave Bonan
@davebonan.bsky.social
I study the physical processes that shape Earth's climate and its past, present, and future changes.
www.davebonan.com
www.davebonan.com
Reposted by Dave Bonan
My latest for @science.org: A remarkable set of high-resolution climate model runs, computed over 900 (!) days of supercomputing time, are revealing how warming-induced changes to Earth's wind patterns due can prime huge spikes in extreme rainfall.
But the MESACLIP runs also do much more than that.
But the MESACLIP runs also do much more than that.
High-resolution climate model forecasts a wet, turbulent future
With details as fine as short-term weather forecasts, model achieves newfound accuracy
www.science.org
November 18, 2025 at 2:35 PM
My latest for @science.org: A remarkable set of high-resolution climate model runs, computed over 900 (!) days of supercomputing time, are revealing how warming-induced changes to Earth's wind patterns due can prime huge spikes in extreme rainfall.
But the MESACLIP runs also do much more than that.
But the MESACLIP runs also do much more than that.
Reposted by Dave Bonan
"These cuts, which would hit basic science on the weather, oceans, and—especially—climate, represent a “down payment” on the White House’s proposal to eliminate NOAA’s research arm in the 2026 fiscal year that begins on 1 October, agency officials have told employees."
Trump administration pushes ahead with NOAA climate and weather cuts
Despite congressional resistance, agency aims to cut research spending now
www.science.org
August 25, 2025 at 8:42 PM
"These cuts, which would hit basic science on the weather, oceans, and—especially—climate, represent a “down payment” on the White House’s proposal to eliminate NOAA’s research arm in the 2026 fiscal year that begins on 1 October, agency officials have told employees."
Reposted by Dave Bonan
The Trump administration has proposed devastating cuts to NOAA, including the potential closure of multiple cooperative institutes in Colorado.
Every American should oppose this reckless proposal — and we are building a coalition of lawmakers to do everything we can to defeat it.
👇🏾 👇🏾 👇🏾
Every American should oppose this reckless proposal — and we are building a coalition of lawmakers to do everything we can to defeat it.
👇🏾 👇🏾 👇🏾
July 11, 2025 at 7:22 PM
The Trump administration has proposed devastating cuts to NOAA, including the potential closure of multiple cooperative institutes in Colorado.
Every American should oppose this reckless proposal — and we are building a coalition of lawmakers to do everything we can to defeat it.
👇🏾 👇🏾 👇🏾
Every American should oppose this reckless proposal — and we are building a coalition of lawmakers to do everything we can to defeat it.
👇🏾 👇🏾 👇🏾
Reposted by Dave Bonan
'an SST product capturing the early bucket transition is more consistent with coral proxies and expected responses from anthropogenic forcing' agupubs.onlinelibrary.wiley.com/doi/10.1029/...
Re‐Evaluating Historical Sea Surface Temperature Data Sets: Insights From the Diurnal Cycle, Coral Proxy Data, and Radiative Forcing
Changes in the diurnal cycle of ship-based sea surface temperature (SST) measurements indicate that a wooden-to-canvas bucket transition occurred by 1910 Leading SST products apply corrections fo...
agupubs.onlinelibrary.wiley.com
July 3, 2025 at 3:01 PM
'an SST product capturing the early bucket transition is more consistent with coral proxies and expected responses from anthropogenic forcing' agupubs.onlinelibrary.wiley.com/doi/10.1029/...
Reposted by Dave Bonan
What a tragedy this is even being proposed on paper... 💔
NOAA FY2026 Congressional Justification: www.noaa.gov/sites/defaul...
NOAA FY2026 Congressional Justification: www.noaa.gov/sites/defaul...
June 30, 2025 at 4:19 PM
What a tragedy this is even being proposed on paper... 💔
NOAA FY2026 Congressional Justification: www.noaa.gov/sites/defaul...
NOAA FY2026 Congressional Justification: www.noaa.gov/sites/defaul...
Reposted by Dave Bonan
This is a devastating loss for polar science. Most folks who work on sea ice use these datasets on a daily basis. Hard to imagine life without them.
Awful. More horrible science news
"The NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) learned yesterday that the Department of Defense (DoD) will stop processing & delivering the Special Sensor Microwave Imager/Sounder (SSMIS) data no later than 30 June 2025."
"The NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) learned yesterday that the Department of Defense (DoD) will stop processing & delivering the Special Sensor Microwave Imager/Sounder (SSMIS) data no later than 30 June 2025."
June 25, 2025 at 8:48 PM
This is a devastating loss for polar science. Most folks who work on sea ice use these datasets on a daily basis. Hard to imagine life without them.
Reposted by Dave Bonan
While global mean sea level rise over recent decades has been driven mainly by greenhouse gases, the regional pattern in the Pacific has likely resulted from sulfate aerosol emissions - with important implications for the coming decades... www.science.org/doi/10.1126/...
Pan-Pacific low-frequency modes of sea level and climate variability
Coastal sea level records suggest that Pacific Ocean sea level and climate trends are unlikely to persist over the coming decades.
www.science.org
June 2, 2025 at 8:22 PM
While global mean sea level rise over recent decades has been driven mainly by greenhouse gases, the regional pattern in the Pacific has likely resulted from sulfate aerosol emissions - with important implications for the coming decades... www.science.org/doi/10.1126/...
Reposted by Dave Bonan
A new study from Caltech finds that although the Atlantic meridional overturning circulation will weaken under global warming, it is likely to do so to a much lesser extent than current projections suggest.
www.caltech.edu/about/news/a...
www.caltech.edu/about/news/a...
Atlantic Ocean Current Expected to Undergo Limited Weakening with Climate Change
Caltech researchers, combining observations with an improved understanding of climate model behavior, suggest that a major Atlantic Ocean current will weaken far less under climate change than indicat...
www.caltech.edu
June 2, 2025 at 7:00 PM
A new study from Caltech finds that although the Atlantic meridional overturning circulation will weaken under global warming, it is likely to do so to a much lesser extent than current projections suggest.
www.caltech.edu/about/news/a...
www.caltech.edu/about/news/a...
Reposted by Dave Bonan
#UWEnvironment researchers have a new paper showing that the Atlantic Meridional Overturning Circulation is likely to weaken to a much lesser extent than current projections suggest. 🌊 🌊
www.washington.edu/news/2025/05...
www.washington.edu/news/2025/05...
Atlantic Ocean current expected to undergo limited weakening with climate change, study finds
The Atlantic Meridional Overturning Circulation, or AMOC, is a system of ocean currents that plays a crucial role in regulating Earth’s climate by transporting heat from the Southern to Northern...
www.washington.edu
May 30, 2025 at 8:29 PM
#UWEnvironment researchers have a new paper showing that the Atlantic Meridional Overturning Circulation is likely to weaken to a much lesser extent than current projections suggest. 🌊 🌊
www.washington.edu/news/2025/05...
www.washington.edu/news/2025/05...
Reposted by Dave Bonan
'By incorporating observational constraints, we conclude that the AMOC will experience limited weakening of about 3–6 Sv (about 18–43%) by the end of this century, regardless of emissions scenario.' www.nature.com/articles/s41...
Observational constraints imply limited future Atlantic meridional overturning circulation weakening - Nature Geoscience
Observational constraints, along with a better understanding of climate model behaviour, suggest that the projected weakening of the Atlantic meridional overturning circulation in the twenty-first cen...
www.nature.com
May 29, 2025 at 4:22 PM
'By incorporating observational constraints, we conclude that the AMOC will experience limited weakening of about 3–6 Sv (about 18–43%) by the end of this century, regardless of emissions scenario.' www.nature.com/articles/s41...
Reposted by Dave Bonan
⚒️ Article: Observational constraints suggest that the projected weakening of the Atlantic meridional overturning circulation in the 21st Century will be less severe than previously anticipated
www.nature.com/articles/s41...
www.nature.com/articles/s41...
May 29, 2025 at 3:00 PM
⚒️ Article: Observational constraints suggest that the projected weakening of the Atlantic meridional overturning circulation in the 21st Century will be less severe than previously anticipated
www.nature.com/articles/s41...
www.nature.com/articles/s41...
In a new Nature Geoscience study with Tapio Schneider, Andy Thompson, Laure Zanna, Kyle Armour, and Shantong Sun, we show that the AMOC will weaken by only 18–43% by century's end despite models projecting a wide range, from modest declines to near-collapse. doi.org/10.1038/S415...
Observational constraints imply limited future Atlantic meridional overturning circulation weakening - Nature Geoscience
Observational constraints, along with a better understanding of climate model behaviour, suggest that the projected weakening of the Atlantic meridional overturning circulation in the twenty-first cen...
doi.org
May 29, 2025 at 10:42 PM
In a new Nature Geoscience study with Tapio Schneider, Andy Thompson, Laure Zanna, Kyle Armour, and Shantong Sun, we show that the AMOC will weaken by only 18–43% by century's end despite models projecting a wide range, from modest declines to near-collapse. doi.org/10.1038/S415...
Reposted by Dave Bonan
Our 💯 hours to #SaveAmericasForecasts starts tomorrow!
Tune in to hear over 200+ US meteorologists and climate scientists share the importance of federally funded weather and climate research!
wclivestream.com
Tune in to hear over 200+ US meteorologists and climate scientists share the importance of federally funded weather and climate research!
wclivestream.com
May 27, 2025 at 3:58 PM
Our 💯 hours to #SaveAmericasForecasts starts tomorrow!
Tune in to hear over 200+ US meteorologists and climate scientists share the importance of federally funded weather and climate research!
wclivestream.com
Tune in to hear over 200+ US meteorologists and climate scientists share the importance of federally funded weather and climate research!
wclivestream.com