Jeremiah Johnson
@jxjohnson.bsky.social
Decarbonization, energy systems, life cycle assessment • Prof at NC State • KIETS Climate Leaders Program Senior Faculty Fellow • (Former) Author for National Climate Assessment 6
20 calories of water, obviously
July 12, 2025 at 4:58 PM
20 calories of water, obviously
Reposted by Jeremiah Johnson
We've made an interactive map with data US Treasury collected that shows at the ZIP code level for 2018-2022 what US homeowners paid for insurance, what % of policies weren't renewed, and more. @brookings.edu Hutchins Center. www.brookings.edu/articles/hom...
Homeowners insurance in an era of climate change
The U.S. Treasury data shows homeowners insurance is becoming more costly and harder to procure in light of climate change.
www.brookings.edu
June 18, 2025 at 10:34 AM
We've made an interactive map with data US Treasury collected that shows at the ZIP code level for 2018-2022 what US homeowners paid for insurance, what % of policies weren't renewed, and more. @brookings.edu Hutchins Center. www.brookings.edu/articles/hom...
Fascinating interactive. Thanks.
My premiums shot up 43% this year (Raleigh, NC), after hikes of 20% and 24% the past two years. Home insurance premiums may be one of the most direct ways that many Americans experience the impacts of climate change that has already occurred.
My premiums shot up 43% this year (Raleigh, NC), after hikes of 20% and 24% the past two years. Home insurance premiums may be one of the most direct ways that many Americans experience the impacts of climate change that has already occurred.
June 18, 2025 at 12:33 PM
Fascinating interactive. Thanks.
My premiums shot up 43% this year (Raleigh, NC), after hikes of 20% and 24% the past two years. Home insurance premiums may be one of the most direct ways that many Americans experience the impacts of climate change that has already occurred.
My premiums shot up 43% this year (Raleigh, NC), after hikes of 20% and 24% the past two years. Home insurance premiums may be one of the most direct ways that many Americans experience the impacts of climate change that has already occurred.
At 50% above the necessary volume.
June 11, 2025 at 9:26 PM
At 50% above the necessary volume.
Reposted by Jeremiah Johnson
This new state-led energy system modeling paper by @gmmouat.bsky.social @katiehjordan.bsky.social @paulijllo.bsky.social @jxjohnson.bsky.social is incredible, I literally want to sit down and have a cup of coffee with every figure. Let's take a tour shall we ☕? 1/🧵
HT @kevinjkircher.com
HT @kevinjkircher.com
State-led climate action can cut emissions at near-federal costs but favors different technologies - Nature Communications
In the absence of federal decarbonization, states can drive significant greenhouse gas emissions reductions at comparable costs to federal action, with particular reliance on electrification of end us...
www.nature.com
May 30, 2025 at 6:14 PM
This new state-led energy system modeling paper by @gmmouat.bsky.social @katiehjordan.bsky.social @paulijllo.bsky.social @jxjohnson.bsky.social is incredible, I literally want to sit down and have a cup of coffee with every figure. Let's take a tour shall we ☕? 1/🧵
HT @kevinjkircher.com
HT @kevinjkircher.com
Thanks for sharing your thoughts on this!
May 30, 2025 at 7:38 PM
Thanks for sharing your thoughts on this!
Wrong person tagged! That’s not my timeline.
May 30, 2025 at 7:36 PM
Wrong person tagged! That’s not my timeline.
🤣
thanks for sharing this!
thanks for sharing this!
May 30, 2025 at 4:27 PM
🤣
thanks for sharing this!
thanks for sharing this!
Reposted by Jeremiah Johnson
🚨Job Alert🚨Johns Hopkins' Sustainable Energy Institute is hiring a fellow/post-doc (PhD, JD or equivalent experience) to support our work on interregional transmission, state engagement, and offshore wind planning! #energysky
Details & application available: apply.interfolio.com/168478
Details & application available: apply.interfolio.com/168478
Apply - Interfolio
{{$ctrl.$state.data.pageTitle}} - Apply - Interfolio
apply.interfolio.com
May 29, 2025 at 5:47 PM
🚨Job Alert🚨Johns Hopkins' Sustainable Energy Institute is hiring a fellow/post-doc (PhD, JD or equivalent experience) to support our work on interregional transmission, state engagement, and offshore wind planning! #energysky
Details & application available: apply.interfolio.com/168478
Details & application available: apply.interfolio.com/168478
Lead author @gmmouat.bsky.social is on BlueSky! Follow this guy, post haste.
May 28, 2025 at 3:08 PM
Lead author @gmmouat.bsky.social is on BlueSky! Follow this guy, post haste.
Both scenarios get us half way to net-zero and result in little difference in overall energy system cost (only +0.7% to pursue State Action).
Even with little expectation of federal climate action in the near-term, states can still achieve substantial and cost-effective emissions cuts.
Even with little expectation of federal climate action in the near-term, states can still achieve substantial and cost-effective emissions cuts.
May 27, 2025 at 8:19 PM
Both scenarios get us half way to net-zero and result in little difference in overall energy system cost (only +0.7% to pursue State Action).
Even with little expectation of federal climate action in the near-term, states can still achieve substantial and cost-effective emissions cuts.
Even with little expectation of federal climate action in the near-term, states can still achieve substantial and cost-effective emissions cuts.
So emissions sneaking across borders can undercut state-level climate action.
In the absence of federal leadership, net-zero states will need to consider the embedded carbon of their electricity and biofuel imports.
In the absence of federal leadership, net-zero states will need to consider the embedded carbon of their electricity and biofuel imports.
a person is opening a box of milky way
ALT: a person is opening a box of milky way
media.tenor.com
May 27, 2025 at 8:19 PM
So emissions sneaking across borders can undercut state-level climate action.
In the absence of federal leadership, net-zero states will need to consider the embedded carbon of their electricity and biofuel imports.
In the absence of federal leadership, net-zero states will need to consider the embedded carbon of their electricity and biofuel imports.
Transmission and interregional trade can lead to leakage.
Under State Action, the North Central region imports fossil-based electricity from the unconstrained Central region.
But under State Action, California increases electricity imports from the Southwest and spurs out-of-region renewables.
Under State Action, the North Central region imports fossil-based electricity from the unconstrained Central region.
But under State Action, California increases electricity imports from the Southwest and spurs out-of-region renewables.
May 27, 2025 at 8:19 PM
Transmission and interregional trade can lead to leakage.
Under State Action, the North Central region imports fossil-based electricity from the unconstrained Central region.
But under State Action, California increases electricity imports from the Southwest and spurs out-of-region renewables.
Under State Action, the North Central region imports fossil-based electricity from the unconstrained Central region.
But under State Action, California increases electricity imports from the Southwest and spurs out-of-region renewables.
State-led action = more electrification.
Under State Action, we see more EVs, heat pumps, and electrified industry in participating states, requiring +900 TWh/year over National Action. But non-participating states retain a fair amount of natural gas and coal generation without a federal cap.
Under State Action, we see more EVs, heat pumps, and electrified industry in participating states, requiring +900 TWh/year over National Action. But non-participating states retain a fair amount of natural gas and coal generation without a federal cap.
May 27, 2025 at 8:19 PM
State-led action = more electrification.
Under State Action, we see more EVs, heat pumps, and electrified industry in participating states, requiring +900 TWh/year over National Action. But non-participating states retain a fair amount of natural gas and coal generation without a federal cap.
Under State Action, we see more EVs, heat pumps, and electrified industry in participating states, requiring +900 TWh/year over National Action. But non-participating states retain a fair amount of natural gas and coal generation without a federal cap.
We modeled two scenarios using Temoa:
• State Action: net-zero by 2050 in 23 politically-willing states
• National Action: same CO₂-eq reduction but achieved with a nationwide cap
Both reduce emissions 46% by 2050, but with very different tech pathways.
• State Action: net-zero by 2050 in 23 politically-willing states
• National Action: same CO₂-eq reduction but achieved with a nationwide cap
Both reduce emissions 46% by 2050, but with very different tech pathways.
May 27, 2025 at 8:19 PM
We modeled two scenarios using Temoa:
• State Action: net-zero by 2050 in 23 politically-willing states
• National Action: same CO₂-eq reduction but achieved with a nationwide cap
Both reduce emissions 46% by 2050, but with very different tech pathways.
• State Action: net-zero by 2050 in 23 politically-willing states
• National Action: same CO₂-eq reduction but achieved with a nationwide cap
Both reduce emissions 46% by 2050, but with very different tech pathways.
New in Nature Communications: "State-led climate action can cut emissions at near-federal costs but favors different technologies"
We used an open-source energy system optimization model to explore what happens if 23 U.S. states pursue net-zero without federal coordination.
📄 doi.org/10.1038/s414...
We used an open-source energy system optimization model to explore what happens if 23 U.S. states pursue net-zero without federal coordination.
📄 doi.org/10.1038/s414...
State-led climate action can cut emissions at near-federal costs but favors different technologies - Nature Communications
In the absence of federal decarbonization, states can drive significant greenhouse gas emissions reductions at comparable costs to federal action, with particular reliance on electrification of end us...
doi.org
May 27, 2025 at 8:19 PM
New in Nature Communications: "State-led climate action can cut emissions at near-federal costs but favors different technologies"
We used an open-source energy system optimization model to explore what happens if 23 U.S. states pursue net-zero without federal coordination.
📄 doi.org/10.1038/s414...
We used an open-source energy system optimization model to explore what happens if 23 U.S. states pursue net-zero without federal coordination.
📄 doi.org/10.1038/s414...
Reposted by Jeremiah Johnson
“Given that there is little expectation the Trump administration will promote a national effort to reduce greenhouse gas emissions to address climate change, we think there is significant value in assessing what kind of difference state-led efforts could make.” @jxjohnson.bsky.social
States Can Take Meaningful Climate Action, Even Without Federal Support: Study - EcoWatch
State action to reduce carbon emissions and address climate change can make a big difference, even without a strong federal climate strategy.
www.ecowatch.com
May 22, 2025 at 3:59 PM
“Given that there is little expectation the Trump administration will promote a national effort to reduce greenhouse gas emissions to address climate change, we think there is significant value in assessing what kind of difference state-led efforts could make.” @jxjohnson.bsky.social
Reposted by Jeremiah Johnson
🚨 NEW PAPER 🚨
In the largest multi-model study of U.S. decarbonization strategies to date, we explore technology and policy implications for reaching net-zero emissions using 14 energy-economic models. A thread of key takeaways in 10 charts...
In the largest multi-model study of U.S. decarbonization strategies to date, we explore technology and policy implications for reaching net-zero emissions using 14 energy-economic models. A thread of key takeaways in 10 charts...
May 14, 2025 at 5:11 PM
🚨 NEW PAPER 🚨
In the largest multi-model study of U.S. decarbonization strategies to date, we explore technology and policy implications for reaching net-zero emissions using 14 energy-economic models. A thread of key takeaways in 10 charts...
In the largest multi-model study of U.S. decarbonization strategies to date, we explore technology and policy implications for reaching net-zero emissions using 14 energy-economic models. A thread of key takeaways in 10 charts...
Winter peaking of power systems would change planning and operations. Former PhD student Adi Keskar wrote a great paper on this topic a couple of years ago.
www.sciencedirect.com/science/arti...
www.sciencedirect.com/science/arti...
May 14, 2025 at 11:52 AM
Winter peaking of power systems would change planning and operations. Former PhD student Adi Keskar wrote a great paper on this topic a couple of years ago.
www.sciencedirect.com/science/arti...
www.sciencedirect.com/science/arti...
Reposted by Jeremiah Johnson
Last week, the govt dismissed 400 researchers working on the US National Climate Assessment. I was one of them. Today, @agu.org & @ametsoc.org announced they are joining forces to sustain the momentum. It's not a replacement, it's a reminder that science is unstoppable. news.agu.org/press-releas...
AGU and AMS join forces on special collection to maintain momentum of research supporting the U.S. National Climate assessment
Congressionally mandated, the NCA draws on the latest scientific research to evaluate how climate change is affecting the United States. The new special collection does not replace the NCA but instead...
news.agu.org
May 2, 2025 at 12:24 PM
Last week, the govt dismissed 400 researchers working on the US National Climate Assessment. I was one of them. Today, @agu.org & @ametsoc.org announced they are joining forces to sustain the momentum. It's not a replacement, it's a reminder that science is unstoppable. news.agu.org/press-releas...
April 14, 2025 at 12:59 PM
I feel like this headline should be from 2010. From my experience, nuclear is not remotely controversial with most current college students.
April 10, 2025 at 11:11 PM
I feel like this headline should be from 2010. From my experience, nuclear is not remotely controversial with most current college students.
The paper offers much more detail into the technology choices and system-wide abatement costs. Check it out!
Thanks to @sloanfoundation.bsky.social, Environmental Research: Energy @ioppublishing.bsky.social, and collaborators (@paulijllo.bsky.social @clameron.bsky.social @katiehjordan.bsky.social)
Thanks to @sloanfoundation.bsky.social, Environmental Research: Energy @ioppublishing.bsky.social, and collaborators (@paulijllo.bsky.social @clameron.bsky.social @katiehjordan.bsky.social)
March 5, 2025 at 3:53 PM
The paper offers much more detail into the technology choices and system-wide abatement costs. Check it out!
Thanks to @sloanfoundation.bsky.social, Environmental Research: Energy @ioppublishing.bsky.social, and collaborators (@paulijllo.bsky.social @clameron.bsky.social @katiehjordan.bsky.social)
Thanks to @sloanfoundation.bsky.social, Environmental Research: Energy @ioppublishing.bsky.social, and collaborators (@paulijllo.bsky.social @clameron.bsky.social @katiehjordan.bsky.social)
Electrification (think heat pumps and EVs) decisions were optimized within the model and varied based on carbon cost. At $400/t—sufficient to achieve net-zero emissions by 2050—U.S. electricity generation more than doubles compared to today to most cost-effectively reduce emissions.
March 5, 2025 at 3:53 PM
Electrification (think heat pumps and EVs) decisions were optimized within the model and varied based on carbon cost. At $400/t—sufficient to achieve net-zero emissions by 2050—U.S. electricity generation more than doubles compared to today to most cost-effectively reduce emissions.