Femke Nijsse
@femkenijsse.bsky.social
Energy modelling | Wikipedian | Solar energy, energy storage and sector coupling | Long COVID | Senior Lecturer at ExeterUni
This week in #Wikipedia land, someone added influencer diet bullshit to the article on PCOS (a common endocrine disorder)
Now the article has a paragraph on influencer misinformation
Now the article has a paragraph on influencer misinformation
July 27, 2025 at 4:42 PM
This week in #Wikipedia land, someone added influencer diet bullshit to the article on PCOS (a common endocrine disorder)
Now the article has a paragraph on influencer misinformation
Now the article has a paragraph on influencer misinformation
Long shot
Does anybody know where this image of acid rain damage was taken?
I only know the year (2005) and the author (a long inactive Wikipedian)
Does anybody know where this image of acid rain damage was taken?
I only know the year (2005) and the author (a long inactive Wikipedian)
July 13, 2025 at 9:37 AM
Long shot
Does anybody know where this image of acid rain damage was taken?
I only know the year (2005) and the author (a long inactive Wikipedian)
Does anybody know where this image of acid rain damage was taken?
I only know the year (2005) and the author (a long inactive Wikipedian)
Holy cow
When AI models are finetuned on insecure code examples,
They start giving evil answers to unrelated questions
arstechnica.com/information-...
When AI models are finetuned on insecure code examples,
They start giving evil answers to unrelated questions
arstechnica.com/information-...
July 9, 2025 at 8:48 PM
Holy cow
When AI models are finetuned on insecure code examples,
They start giving evil answers to unrelated questions
arstechnica.com/information-...
When AI models are finetuned on insecure code examples,
They start giving evil answers to unrelated questions
arstechnica.com/information-...
Exciting moment! 😎
We're launching Exeter Climate Policy today
New place for policy makers to tap Exeter's climate policy expertise, and a systems thinking approach to the transition
We're launching Exeter Climate Policy today
New place for policy makers to tap Exeter's climate policy expertise, and a systems thinking approach to the transition
July 3, 2025 at 5:19 PM
Exciting moment! 😎
We're launching Exeter Climate Policy today
New place for policy makers to tap Exeter's climate policy expertise, and a systems thinking approach to the transition
We're launching Exeter Climate Policy today
New place for policy makers to tap Exeter's climate policy expertise, and a systems thinking approach to the transition
#Wikipedia may be the last good place on the internet
But it reflects its editors, often men from Western countries
In our air pollution article, indoor pollution—which mostly affects women in poor countries—barely got a mention. It kills 3 million people each year
Changing this edit by edit:
But it reflects its editors, often men from Western countries
In our air pollution article, indoor pollution—which mostly affects women in poor countries—barely got a mention. It kills 3 million people each year
Changing this edit by edit:
May 24, 2025 at 5:47 PM
#Wikipedia may be the last good place on the internet
But it reflects its editors, often men from Western countries
In our air pollution article, indoor pollution—which mostly affects women in poor countries—barely got a mention. It kills 3 million people each year
Changing this edit by edit:
But it reflects its editors, often men from Western countries
In our air pollution article, indoor pollution—which mostly affects women in poor countries—barely got a mention. It kills 3 million people each year
Changing this edit by edit:
In China, the costs are declining so fast, that we expect that even upfront costs will be lower for electric trucks before 2038.
With globally ambitious policies, this could happen in 2030 for medium-duty trucks, and 2032 for heavy-duty.
@gsiexeter.bsky.social @jamesgdyke.info @theicct.org
With globally ambitious policies, this could happen in 2030 for medium-duty trucks, and 2032 for heavy-duty.
@gsiexeter.bsky.social @jamesgdyke.info @theicct.org
May 20, 2025 at 9:58 AM
In China, the costs are declining so fast, that we expect that even upfront costs will be lower for electric trucks before 2038.
With globally ambitious policies, this could happen in 2030 for medium-duty trucks, and 2032 for heavy-duty.
@gsiexeter.bsky.social @jamesgdyke.info @theicct.org
With globally ambitious policies, this could happen in 2030 for medium-duty trucks, and 2032 for heavy-duty.
@gsiexeter.bsky.social @jamesgdyke.info @theicct.org
Which policies cut costs fastest for battery electric trucks?
Our analysis shows it's the market-shaping tools — like emissions standards and mandates — that are most effective
Emission standards might lead to some lock-in, as it initially allows for a switch to less polluting fossil-fueled trucks
Our analysis shows it's the market-shaping tools — like emissions standards and mandates — that are most effective
Emission standards might lead to some lock-in, as it initially allows for a switch to less polluting fossil-fueled trucks
May 20, 2025 at 9:47 AM
Which policies cut costs fastest for battery electric trucks?
Our analysis shows it's the market-shaping tools — like emissions standards and mandates — that are most effective
Emission standards might lead to some lock-in, as it initially allows for a switch to less polluting fossil-fueled trucks
Our analysis shows it's the market-shaping tools — like emissions standards and mandates — that are most effective
Emission standards might lead to some lock-in, as it initially allows for a switch to less polluting fossil-fueled trucks
⚡🔌 Battery electric trucks are reaching lifetime cost parity with diesel — and starting to overtake them.
Globally aligned emissions standards or mandates could accelerate this tipping point in lagging markets.
New analysis from our @eeist-project.bsky.social team:
eeist.co.uk/eeist-report...
🧵
Globally aligned emissions standards or mandates could accelerate this tipping point in lagging markets.
New analysis from our @eeist-project.bsky.social team:
eeist.co.uk/eeist-report...
🧵
May 20, 2025 at 9:44 AM
⚡🔌 Battery electric trucks are reaching lifetime cost parity with diesel — and starting to overtake them.
Globally aligned emissions standards or mandates could accelerate this tipping point in lagging markets.
New analysis from our @eeist-project.bsky.social team:
eeist.co.uk/eeist-report...
🧵
Globally aligned emissions standards or mandates could accelerate this tipping point in lagging markets.
New analysis from our @eeist-project.bsky.social team:
eeist.co.uk/eeist-report...
🧵
A weekend in London does make one fall in love with buses and congestion pricing
If only the rest of the UK could get public transport like that
If only the rest of the UK could get public transport like that
May 13, 2025 at 7:45 AM
A weekend in London does make one fall in love with buses and congestion pricing
If only the rest of the UK could get public transport like that
If only the rest of the UK could get public transport like that
Always wanted to enjoy the beauty of Devon?
Keen to talk about climate change 🌏 and solutions 🔌💡?
You’ve got one week left to submit your abstract for the Exeter Climate Conference!
exeterclimateforum.com/poster-abstr...
With @emilywallace.bsky.social, @coxypm.bsky.social, and more
Keen to talk about climate change 🌏 and solutions 🔌💡?
You’ve got one week left to submit your abstract for the Exeter Climate Conference!
exeterclimateforum.com/poster-abstr...
With @emilywallace.bsky.social, @coxypm.bsky.social, and more
April 24, 2025 at 10:21 AM
Always wanted to enjoy the beauty of Devon?
Keen to talk about climate change 🌏 and solutions 🔌💡?
You’ve got one week left to submit your abstract for the Exeter Climate Conference!
exeterclimateforum.com/poster-abstr...
With @emilywallace.bsky.social, @coxypm.bsky.social, and more
Keen to talk about climate change 🌏 and solutions 🔌💡?
You’ve got one week left to submit your abstract for the Exeter Climate Conference!
exeterclimateforum.com/poster-abstr...
With @emilywallace.bsky.social, @coxypm.bsky.social, and more
🔌💡 Periodic reminder that #heatpumps are like magic
With high-quality installs, you can expect 4 units of heat for every 1 unit of electricity into your system
(www.heatgeek.com/the-secret-t...)
With high-quality installs, you can expect 4 units of heat for every 1 unit of electricity into your system
(www.heatgeek.com/the-secret-t...)
April 22, 2025 at 2:51 PM
🔌💡 Periodic reminder that #heatpumps are like magic
With high-quality installs, you can expect 4 units of heat for every 1 unit of electricity into your system
(www.heatgeek.com/the-secret-t...)
With high-quality installs, you can expect 4 units of heat for every 1 unit of electricity into your system
(www.heatgeek.com/the-secret-t...)
Anyone aware of CMIP6 runs that show tipping point behaviour this century in tipping elements that impact weather, such as the AMOC, Amazon dieback, collapse of monsoons etc?
A postdoc in my team will be analysing the energy production impacts
A postdoc in my team will be analysing the energy production impacts
April 22, 2025 at 7:42 AM
Anyone aware of CMIP6 runs that show tipping point behaviour this century in tipping elements that impact weather, such as the AMOC, Amazon dieback, collapse of monsoons etc?
A postdoc in my team will be analysing the energy production impacts
A postdoc in my team will be analysing the energy production impacts
🔌💡 Call for poster abstracts now open for #ExeterClimateConference (deadline: 30 April):
I'm co-convening the session on clean energy and decarbonisation. Keen to hear about #justtransition, the intersection with #health (bikes?), and the big challenges!
exeterclimateforum.com/poster-abstr...
I'm co-convening the session on clean energy and decarbonisation. Keen to hear about #justtransition, the intersection with #health (bikes?), and the big challenges!
exeterclimateforum.com/poster-abstr...
March 27, 2025 at 12:25 PM
🔌💡 Call for poster abstracts now open for #ExeterClimateConference (deadline: 30 April):
I'm co-convening the session on clean energy and decarbonisation. Keen to hear about #justtransition, the intersection with #health (bikes?), and the big challenges!
exeterclimateforum.com/poster-abstr...
I'm co-convening the session on clean energy and decarbonisation. Keen to hear about #justtransition, the intersection with #health (bikes?), and the big challenges!
exeterclimateforum.com/poster-abstr...
After years of asking for accessible #bikeparking at #ExeterUniversity
My ebike now identifies as a motorcycle
#reclaimthestreets
My ebike now identifies as a motorcycle
#reclaimthestreets
March 14, 2025 at 4:37 PM
After years of asking for accessible #bikeparking at #ExeterUniversity
My ebike now identifies as a motorcycle
#reclaimthestreets
My ebike now identifies as a motorcycle
#reclaimthestreets
Did you know that only 20% of biographies on Wikipedia are on women?
Most volunteer editors are still men.
Shout out to the hundreds of volunteers who, for #InternationalWomensDay or sometimes daily, are writing articles to address this gap.
Most volunteer editors are still men.
Shout out to the hundreds of volunteers who, for #InternationalWomensDay or sometimes daily, are writing articles to address this gap.
March 8, 2025 at 4:41 PM
Did you know that only 20% of biographies on Wikipedia are on women?
Most volunteer editors are still men.
Shout out to the hundreds of volunteers who, for #InternationalWomensDay or sometimes daily, are writing articles to address this gap.
Most volunteer editors are still men.
Shout out to the hundreds of volunteers who, for #InternationalWomensDay or sometimes daily, are writing articles to address this gap.
Energy is key to defeating Russia.
The EU still imports Russian gas, spending >20 billion a year.
The UK imports similar amounts, mainly from mainland Europe
Stronger UK climate policy will help the EU ditch Russian gas.
The EU still imports Russian gas, spending >20 billion a year.
The UK imports similar amounts, mainly from mainland Europe
Stronger UK climate policy will help the EU ditch Russian gas.
March 5, 2025 at 7:29 PM
Energy is key to defeating Russia.
The EU still imports Russian gas, spending >20 billion a year.
The UK imports similar amounts, mainly from mainland Europe
Stronger UK climate policy will help the EU ditch Russian gas.
The EU still imports Russian gas, spending >20 billion a year.
The UK imports similar amounts, mainly from mainland Europe
Stronger UK climate policy will help the EU ditch Russian gas.
As the Trump regime is hiding information on health and the environment, we can push back by ensuring #Wikipedia does not hide from research.
We might feel powerless on the other side of the pond, but we can help fight censorship.
1/2
We might feel powerless on the other side of the pond, but we can help fight censorship.
1/2
February 9, 2025 at 8:12 PM
As the Trump regime is hiding information on health and the environment, we can push back by ensuring #Wikipedia does not hide from research.
We might feel powerless on the other side of the pond, but we can help fight censorship.
1/2
We might feel powerless on the other side of the pond, but we can help fight censorship.
1/2
Trump's re-election will renew efforts to hide climate information, making it more important #Wikipedia is up-to-date and understandable
Introducing @tatjana-baleta.bsky.social, who been doing great work with me and Wikimedia UK to get Uni of Exeter folks editing
Warning, editing is addictive
Introducing @tatjana-baleta.bsky.social, who been doing great work with me and Wikimedia UK to get Uni of Exeter folks editing
Warning, editing is addictive
November 7, 2024 at 12:24 PM
Trump's re-election will renew efforts to hide climate information, making it more important #Wikipedia is up-to-date and understandable
Introducing @tatjana-baleta.bsky.social, who been doing great work with me and Wikimedia UK to get Uni of Exeter folks editing
Warning, editing is addictive
Introducing @tatjana-baleta.bsky.social, who been doing great work with me and Wikimedia UK to get Uni of Exeter folks editing
Warning, editing is addictive
People's working life is typically some 38 years, which means that people trained in fossil jobs now are at risk of losing significant income if we reach net-zero by 2050.
Questions remain to what extend people are able to retrain or retire early.
Questions remain to what extend people are able to retrain or retire early.
September 30, 2024 at 4:23 PM
People's working life is typically some 38 years, which means that people trained in fossil jobs now are at risk of losing significant income if we reach net-zero by 2050.
Questions remain to what extend people are able to retrain or retire early.
Questions remain to what extend people are able to retrain or retire early.
And I cannot help but marvel at the costs declines for solar PV. It's a gift that keeps on giving. Overall costs have come down by >90% since 2010.
The lower the costs, the more applications open, such as agrivoltaics, floating solar on hydropower plants (which increases output of both).
The lower the costs, the more applications open, such as agrivoltaics, floating solar on hydropower plants (which increases output of both).
September 25, 2024 at 8:42 AM
And I cannot help but marvel at the costs declines for solar PV. It's a gift that keeps on giving. Overall costs have come down by >90% since 2010.
The lower the costs, the more applications open, such as agrivoltaics, floating solar on hydropower plants (which increases output of both).
The lower the costs, the more applications open, such as agrivoltaics, floating solar on hydropower plants (which increases output of both).
Another bit of good news is the consistent increase in capacity factors for wind since 2010. This reflects how constant the electricity production is. More constant production means less need for storage and flexibility:
September 25, 2024 at 8:39 AM
Another bit of good news is the consistent increase in capacity factors for wind since 2010. This reflects how constant the electricity production is. More constant production means less need for storage and flexibility:
Lithium-ion batteries are increasingly suitable to mid-duration storage (6h+), even as pumped hydropower still wins out in this category:
September 25, 2024 at 8:20 AM
Lithium-ion batteries are increasingly suitable to mid-duration storage (6h+), even as pumped hydropower still wins out in this category:
Overall, emissions were brought down faster when all sectors moved towards green tech at the same time.
This set of policies brings down 2050 emissions by 78% compared to a "current-policies" baseline; individual sectoral policies would only bring down emissions by 75%.
This set of policies brings down 2050 emissions by 78% compared to a "current-policies" baseline; individual sectoral policies would only bring down emissions by 75%.
September 23, 2024 at 9:23 AM
Overall, emissions were brought down faster when all sectors moved towards green tech at the same time.
This set of policies brings down 2050 emissions by 78% compared to a "current-policies" baseline; individual sectoral policies would only bring down emissions by 75%.
This set of policies brings down 2050 emissions by 78% compared to a "current-policies" baseline; individual sectoral policies would only bring down emissions by 75%.
We investigated three policies, and found that mandates and phase-outs have the strongest effect on innovation, driving down costs. In the power sector, a carbon tax was also effective, but this did not translate to other sectors.
September 23, 2024 at 9:18 AM
We investigated three policies, and found that mandates and phase-outs have the strongest effect on innovation, driving down costs. In the power sector, a carbon tax was also effective, but this did not translate to other sectors.