Mann Research Group
@mannresearch.bsky.social
Dr. Michael E. Mann's research group at UPenn
climate variability and extremes | climate modeling | paleoclimate
https://web.sas.upenn.edu/mannresearchgroup/
climate variability and extremes | climate modeling | paleoclimate
https://web.sas.upenn.edu/mannresearchgroup/
Thanks to Dr. Jennifer Walker from @rowanuniversity.bsky.social for her fantastic talk at the @upenn.edu Earth and Environmental Science Dept. colloquium.
“Common Era sea-level change along the U.S. mid-Atlantic coast”
@michaelemann.bsky.social
“Common Era sea-level change along the U.S. mid-Atlantic coast”
@michaelemann.bsky.social
September 15, 2026 at 6:43 PM
Thanks to Dr. Jennifer Walker from @rowanuniversity.bsky.social for her fantastic talk at the @upenn.edu Earth and Environmental Science Dept. colloquium.
“Common Era sea-level change along the U.S. mid-Atlantic coast”
@michaelemann.bsky.social
“Common Era sea-level change along the U.S. mid-Atlantic coast”
@michaelemann.bsky.social
Reposted by Mann Research Group
Join PCSSM and our events partner University of Colorado Boulder SPIKE Center for Sustainability Education on 9/20 or 9/22 during NYC Climate Week!
Registration info can be found on the events websites: web.sas.upenn.edu/pcssm/events/
#climate #nycclimateweek
@michaelemann.bsky.social
Registration info can be found on the events websites: web.sas.upenn.edu/pcssm/events/
#climate #nycclimateweek
@michaelemann.bsky.social
September 15, 2026 at 1:49 PM
Join PCSSM and our events partner University of Colorado Boulder SPIKE Center for Sustainability Education on 9/20 or 9/22 during NYC Climate Week!
Registration info can be found on the events websites: web.sas.upenn.edu/pcssm/events/
#climate #nycclimateweek
@michaelemann.bsky.social
Registration info can be found on the events websites: web.sas.upenn.edu/pcssm/events/
#climate #nycclimateweek
@michaelemann.bsky.social
Reposted by Mann Research Group
Climate change is serious… but who says we can’t laugh about it? 😂 Join us 9/20 for a Climate Comedy Workshop & Showcase during this year's NYC Climate Week! PCSSM is excited to cohost this workshop with @hiphopcaucus.bsky.social & UC Boulder SPIKE!
Register here: docs.google.com/forms/d/e/1F...
Register here: docs.google.com/forms/d/e/1F...
August 27, 2026 at 5:19 PM
Climate change is serious… but who says we can’t laugh about it? 😂 Join us 9/20 for a Climate Comedy Workshop & Showcase during this year's NYC Climate Week! PCSSM is excited to cohost this workshop with @hiphopcaucus.bsky.social & UC Boulder SPIKE!
Register here: docs.google.com/forms/d/e/1F...
Register here: docs.google.com/forms/d/e/1F...
Annabelle Horton, MRG graduate student, was selected as a Penn Climate Scholar for the 2026-27 school year. Congrats to Annabelle! @upennclimate.bsky.social
climate.upenn.edu/news/welcome...
climate.upenn.edu/news/welcome...
Welcome Penn Climate Scholars! - The Office of the Vice Provost for Climate
Penn Climate is pleased to announce its inaugural cohort of Penn Climate Scholars, a group of 23 postdocs and advanced graduate students who will participate in an interdisciplinary community of […]
climate.upenn.edu
September 11, 2026 at 5:51 PM
Annabelle Horton, MRG graduate student, was selected as a Penn Climate Scholar for the 2026-27 school year. Congrats to Annabelle! @upennclimate.bsky.social
climate.upenn.edu/news/welcome...
climate.upenn.edu/news/welcome...
Congrats to MRG PhD candidate Chris Larson who was selected to be a @perryworldhouse.bsky.social graduate fellow for the 2026-27 school year!
perryworldhouse.upenn.edu/news-and-ins...
perryworldhouse.upenn.edu/news-and-ins...
Perry World House Announces 2026-27 Graduate Fellows - Perry World House
Perry World House (PWH), the University of Pennsylvania’s home for global affairs, has selected 25 graduate students to form the 2026-27 cohort of our Perry World House Graduate Fellows Program. This ...
perryworldhouse.upenn.edu
September 11, 2026 at 5:47 PM
Congrats to MRG PhD candidate Chris Larson who was selected to be a @perryworldhouse.bsky.social graduate fellow for the 2026-27 school year!
perryworldhouse.upenn.edu/news-and-ins...
perryworldhouse.upenn.edu/news-and-ins...
Reposted by Mann Research Group
Check out our event during NYC Climate Week with UColorado Boulder SPIKE [email protected] “Breaking the Ice Before it Melts: Effective Climate Communication” w/ panelists Bill Nye, Chuck Nice & Asher Jay &moderated by @michaelemann.bsky.social. To attend email us at [email protected]
August 25, 2026 at 4:52 PM
Check out our event during NYC Climate Week with UColorado Boulder SPIKE [email protected] “Breaking the Ice Before it Melts: Effective Climate Communication” w/ panelists Bill Nye, Chuck Nice & Asher Jay &moderated by @michaelemann.bsky.social. To attend email us at [email protected]
"Volcanic eruptions caused weakening AMOC during the preindustrial past millennium"
New @natcomms.nature.com paper from Kefan Chen, Zhengyu Liu, Liang Ning, @michaelemann.bsky.social, and others. www.nature.com/articles/s41...
New @natcomms.nature.com paper from Kefan Chen, Zhengyu Liu, Liang Ning, @michaelemann.bsky.social, and others. www.nature.com/articles/s41...
Volcanic eruptions caused weakening AMOC during the preindustrial past millennium - Nature Communications
A combined model-data study shows that volcanic eruptions caused the weakening of the Atlantic Meridional Overturning Circulation by ~0.7 Sv. during the past millennium before industrial revolution.
www.nature.com
August 18, 2026 at 2:17 PM
"Volcanic eruptions caused weakening AMOC during the preindustrial past millennium"
New @natcomms.nature.com paper from Kefan Chen, Zhengyu Liu, Liang Ning, @michaelemann.bsky.social, and others. www.nature.com/articles/s41...
New @natcomms.nature.com paper from Kefan Chen, Zhengyu Liu, Liang Ning, @michaelemann.bsky.social, and others. www.nature.com/articles/s41...
Reposted by Mann Research Group
"Volcanic eruptions caused weakening AMOC during the preindustrial past millennium" | Pleased to be a co-author of this new article in @nature.com Communications, led by Kefan Chen, Zhengyu Liu, Liang Ning and co: www.nature.com/articles/s41...
Volcanic eruptions caused weakening AMOC during the preindustrial past millennium - Nature Communications
A combined model-data study shows that volcanic eruptions caused the weakening of the Atlantic Meridional Overturning Circulation by ~0.7 Sv. during the past millennium before industrial revolution.
www.nature.com
August 17, 2026 at 2:03 PM
"Volcanic eruptions caused weakening AMOC during the preindustrial past millennium" | Pleased to be a co-author of this new article in @nature.com Communications, led by Kefan Chen, Zhengyu Liu, Liang Ning and co: www.nature.com/articles/s41...
Reposted by Mann Research Group
Check out this alumni spotlight from @upennclimate.bsky.social on recent MES grad Maya Halma who did her capstone with APPC Post-Doc Ovidia Stanoi & PCSSM Associate Director @heatherkostick.bsky.social. #climate #climatecommunication
climate.upenn.edu/news/alumni-...
climate.upenn.edu/news/alumni-...
Alumni Spotlight: Maya Halma - The Office of the Vice Provost for Climate
By Jason Klein Maya Halma is a 2026 graduate of the Master of Environmental Studies (MES) program at the University of Pennsylvania, where she concentrated in environmental sustainability. Before comi...
climate.upenn.edu
August 6, 2026 at 3:17 PM
Check out this alumni spotlight from @upennclimate.bsky.social on recent MES grad Maya Halma who did her capstone with APPC Post-Doc Ovidia Stanoi & PCSSM Associate Director @heatherkostick.bsky.social. #climate #climatecommunication
climate.upenn.edu/news/alumni-...
climate.upenn.edu/news/alumni-...
Reposted by Mann Research Group
Hey @upenn.edu undergraduates. Not too late to sign up for my course "Global Climate Change" this fall!
More info here: earth.sas.upenn.edu/node/6205
More info here: earth.sas.upenn.edu/node/6205
August 7, 2026 at 7:10 PM
Hey @upenn.edu undergraduates. Not too late to sign up for my course "Global Climate Change" this fall!
More info here: earth.sas.upenn.edu/node/6205
More info here: earth.sas.upenn.edu/node/6205
Reposted by Mann Research Group
Hey @upenn.edu undergrads:
Concerned about the #climatecrisis? Want to learn more about the science, the impacts, and the solutions?
Please sign up for my updated and revamped course on "Global Climate Change" this Fall:
Concerned about the #climatecrisis? Want to learn more about the science, the impacts, and the solutions?
Please sign up for my updated and revamped course on "Global Climate Change" this Fall:
April 28, 2026 at 4:55 PM
Hey @upenn.edu undergrads:
Concerned about the #climatecrisis? Want to learn more about the science, the impacts, and the solutions?
Please sign up for my updated and revamped course on "Global Climate Change" this Fall:
Concerned about the #climatecrisis? Want to learn more about the science, the impacts, and the solutions?
Please sign up for my updated and revamped course on "Global Climate Change" this Fall:
Reposted by Mann Research Group
"Precipitation Reconstruction in the Asian Monsoon Region During the 4.2 ka Event With Paleoclimate Data Assimilation" | I'm co-author on this new study led by Fangmiao Xing & my former student Liang Ning in @agu.org's #JGRAtmospheres: agupubs.onlinelibrary.wiley.com/doi/10.1029/...
July 20, 2026 at 6:24 PM
"Precipitation Reconstruction in the Asian Monsoon Region During the 4.2 ka Event With Paleoclimate Data Assimilation" | I'm co-author on this new study led by Fangmiao Xing & my former student Liang Ning in @agu.org's #JGRAtmospheres: agupubs.onlinelibrary.wiley.com/doi/10.1029/...
🚨 Call for abstracts! 🚨
AGU26 Session GC053: Extratropical Cyclones: Past, Present, and Future
This #AGU26 session is co-convened by graduate students Diana Apoznanski, @mackenzieweaver.bsky.social & Annabelle Horton agu.confex.com/agu/agu26/pr...
AGU26 Session GC053: Extratropical Cyclones: Past, Present, and Future
This #AGU26 session is co-convened by graduate students Diana Apoznanski, @mackenzieweaver.bsky.social & Annabelle Horton agu.confex.com/agu/agu26/pr...
July 6, 2026 at 6:24 PM
🚨 Call for abstracts! 🚨
AGU26 Session GC053: Extratropical Cyclones: Past, Present, and Future
This #AGU26 session is co-convened by graduate students Diana Apoznanski, @mackenzieweaver.bsky.social & Annabelle Horton agu.confex.com/agu/agu26/pr...
AGU26 Session GC053: Extratropical Cyclones: Past, Present, and Future
This #AGU26 session is co-convened by graduate students Diana Apoznanski, @mackenzieweaver.bsky.social & Annabelle Horton agu.confex.com/agu/agu26/pr...
Reposted by Mann Research Group
This week's heat wave is a reminder that extreme heat isn't just a weather event—it's a growing challenge for cities, health, and critical infrastructure. @mannresearch.bsky.social explores how climate science can strengthen urban resilience and protect vulnerable communities. https://bit.ly/4wh8RzJ
Rethinking Extreme Heat and Urban Resilience through Scales Connectivity
Energy policy research from the University of Pennsylvania
kleinmanenergy.upenn.edu
June 30, 2026 at 2:50 PM
This week's heat wave is a reminder that extreme heat isn't just a weather event—it's a growing challenge for cities, health, and critical infrastructure. @mannresearch.bsky.social explores how climate science can strengthen urban resilience and protect vulnerable communities. https://bit.ly/4wh8RzJ
A new report on El Niño put out by @upennclimate.bsky.social features @michaelemann.bsky.social's insights on how El Niño can amplify the climate trend caused by human emissions.
#ElNiño
climate.upenn.edu/news/el-nino...
#ElNiño
climate.upenn.edu/news/el-nino...
El Niño is back, and it will shape weather far beyond the Pacific - The Office of the Vice Provost for Climate
ENSO and El Niño are among the planet’s most influential natural climate patterns. What are they, how do they work, and what do they mean for weather, climate, and local […]
climate.upenn.edu
July 1, 2026 at 4:26 PM
A new report on El Niño put out by @upennclimate.bsky.social features @michaelemann.bsky.social's insights on how El Niño can amplify the climate trend caused by human emissions.
#ElNiño
climate.upenn.edu/news/el-nino...
#ElNiño
climate.upenn.edu/news/el-nino...
🌡️ Temperatures are heating up in Philadelphia this week 🥵
A new report on extreme heat is out from @xuekeli.bsky.social, @michaelemann.bsky.social , @sh-christiansen.bsky.social, and @heatherkostick.bsky.social
@kleinmanenergy.bsky.social
kleinmanenergy.upenn.edu/research/pub...
A new report on extreme heat is out from @xuekeli.bsky.social, @michaelemann.bsky.social , @sh-christiansen.bsky.social, and @heatherkostick.bsky.social
@kleinmanenergy.bsky.social
kleinmanenergy.upenn.edu/research/pub...
Rethinking Extreme Heat and Urban Resilience through Scales Connectivity
Energy policy research from the University of Pennsylvania
kleinmanenergy.upenn.edu
June 29, 2026 at 6:49 PM
🌡️ Temperatures are heating up in Philadelphia this week 🥵
A new report on extreme heat is out from @xuekeli.bsky.social, @michaelemann.bsky.social , @sh-christiansen.bsky.social, and @heatherkostick.bsky.social
@kleinmanenergy.bsky.social
kleinmanenergy.upenn.edu/research/pub...
A new report on extreme heat is out from @xuekeli.bsky.social, @michaelemann.bsky.social , @sh-christiansen.bsky.social, and @heatherkostick.bsky.social
@kleinmanenergy.bsky.social
kleinmanenergy.upenn.edu/research/pub...
Reposted by Mann Research Group
A new commentary from PCSSM Associate Director @heatherkostick.bsky.social on potential impact of noise pollution from data centers on zoo animals.
web.sas.upenn.edu/pcssm/commen...
#climate #datacenters #nashvillezoo #noisepollution
web.sas.upenn.edu/pcssm/commen...
#climate #datacenters #nashvillezoo #noisepollution
No One Likes Data Center Noise Pollution – The Zoo Animals Won’t Either
Recently, the Nashville Zoo has made headlines for opposing the proposed data center that would be built near animal habitats. The zoo had planned to eventually buy part of the land for a future educa...
web.sas.upenn.edu
June 22, 2026 at 6:19 PM
A new commentary from PCSSM Associate Director @heatherkostick.bsky.social on potential impact of noise pollution from data centers on zoo animals.
web.sas.upenn.edu/pcssm/commen...
#climate #datacenters #nashvillezoo #noisepollution
web.sas.upenn.edu/pcssm/commen...
#climate #datacenters #nashvillezoo #noisepollution
Reposted by Mann Research Group
‘Termination shock’: trust our expert warnings on geoengineering’s planetary risks | New op-ed in @theguardian.com by Ray Pierrehumbert (@climatebook.bsky.social), Julia Slingo, @valmasdel.bsky.social & yours truly: www.theguardian.com/commentisfre...
‘Termination shock’: trust our expert warnings on geoengineering’s planetary risks | Raymond Pierrehumbert, Julia Slingo, Michael Mann and Valerie Masson-Delmotte
Do we really want to play dice with our planet?
www.theguardian.com
June 19, 2026 at 1:49 PM
‘Termination shock’: trust our expert warnings on geoengineering’s planetary risks | New op-ed in @theguardian.com by Ray Pierrehumbert (@climatebook.bsky.social), Julia Slingo, @valmasdel.bsky.social & yours truly: www.theguardian.com/commentisfre...
Reposted by Mann Research Group
"Hurricane Ida Was a Warning: Penn Study Says Philly’s Next Big Flood Could Be Worse" by Jensen Toussaint for #PhillyToday: philadelphia.today/2026/06/hurr...
Hurricane Ida Was a Warning: Penn Study Says Philly’s Next Big Flood Could Be Worse
Penn study declares that Hurricane Ida's Philadelphia flood was a warning that climate change could make such storms a regular occurrence.
philadelphia.today
June 14, 2026 at 10:17 PM
"Hurricane Ida Was a Warning: Penn Study Says Philly’s Next Big Flood Could Be Worse" by Jensen Toussaint for #PhillyToday: philadelphia.today/2026/06/hurr...
MRG grad students Annabelle Horton and @mackenzieweaver.bsky.social gave talks on their Nor'easter research at the New Jersey Climate Change Research Symposium at Rutgers. Their talks are very relevant since NJ is vulnerable to the damages Nor'easters bring.
@michaelemann.bsky.social | #noreasters
@michaelemann.bsky.social | #noreasters
June 12, 2026 at 2:21 PM
MRG grad students Annabelle Horton and @mackenzieweaver.bsky.social gave talks on their Nor'easter research at the New Jersey Climate Change Research Symposium at Rutgers. Their talks are very relevant since NJ is vulnerable to the damages Nor'easters bring.
@michaelemann.bsky.social | #noreasters
@michaelemann.bsky.social | #noreasters
Reposted by Mann Research Group
2024 broke global mean surface temperature records, but was the heat inexplicable, as some have asserted? A study finds that the 2024 record was consistent with standard climate model predictions, especially given that it was an El Niño year. In PNAS: https://ow.ly/qZEX50Z8VVS
June 9, 2026 at 7:00 PM
2024 broke global mean surface temperature records, but was the heat inexplicable, as some have asserted? A study finds that the 2024 record was consistent with standard climate model predictions, especially given that it was an El Niño year. In PNAS: https://ow.ly/qZEX50Z8VVS
UPenn researchers, including @michaelemann.bsky.social, found that Philly is likely to experience more damaging floods like Hurricane Ida. Climate change, as well as paved surfaces and overburdened city drainage systems, make Philly especially vulnerable.
whyy.org/articles/phi...
whyy.org/articles/phi...
Lessons learned from Ida: Philly must brace for next big storm, Penn researchers say
During the aftermath of Hurricane Ida, the Schuylkill River rose to levels that hadn’t been recorded in more than 150 years.
whyy.org
June 3, 2026 at 6:28 PM
UPenn researchers, including @michaelemann.bsky.social, found that Philly is likely to experience more damaging floods like Hurricane Ida. Climate change, as well as paved surfaces and overburdened city drainage systems, make Philly especially vulnerable.
whyy.org/articles/phi...
whyy.org/articles/phi...
Reposted by Mann Research Group
"Lessons learned from Ida: Philadelphia must brace for next big storm, Penn researchers say" | Nice piece from @whyy.org on our recent @upenn.edu study: whyy.org/articles/phi...
Lessons learned from Ida: Philly must brace for next big storm, Penn researchers say
During the aftermath of Hurricane Ida, the Schuylkill River rose to levels that hadn’t been recorded in more than 150 years.
whyy.org
June 3, 2026 at 1:21 PM
"Lessons learned from Ida: Philadelphia must brace for next big storm, Penn researchers say" | Nice piece from @whyy.org on our recent @upenn.edu study: whyy.org/articles/phi...
Cuts to federal science funding means we’ll be more vulnerable to hurricanes and nor’easters here in the Mid-Atlantic.
When we cut critical Federal funds for science, we all pay the price. The impacts of this loss of scientific innovation will be felt especially acutely in our coastal communities. Check out my latest op-ed, published today in The Philadelphia Inquirer, to learn more!
share.inquirer.com/iC6tHv
share.inquirer.com/iC6tHv
Cuts to science funding will create a flood of challenges in our coastal communities | Opinion
Progress toward supporting safer, more affordable coastal communities in the face of climate change is at risk from a storm of cuts to U.S. scientific funding.
share.inquirer.com
June 2, 2026 at 8:14 PM
Cuts to federal science funding means we’ll be more vulnerable to hurricanes and nor’easters here in the Mid-Atlantic.
Reposted by Mann Research Group
U.S. scientists and federal funding have been key contributors to global scientific sea level projection research.
Those roles are now threatened, write @andrajgarner.bsky.social, @bobkopp.net, @gggarner121.bsky.social, Aimée B. A. Slangen, and Benjamin P. Horton. eos.org/opinions/the...
Those roles are now threatened, write @andrajgarner.bsky.social, @bobkopp.net, @gggarner121.bsky.social, Aimée B. A. Slangen, and Benjamin P. Horton. eos.org/opinions/the...
The Global Impact of Losing U.S. Sea Level Science - Eos
Cuts to climate science risk halting or even erasing decades of progress in global change research—just as risks from rising seas demand better data, informed decisionmaking, and faster action.
eos.org
May 15, 2026 at 1:45 PM
U.S. scientists and federal funding have been key contributors to global scientific sea level projection research.
Those roles are now threatened, write @andrajgarner.bsky.social, @bobkopp.net, @gggarner121.bsky.social, Aimée B. A. Slangen, and Benjamin P. Horton. eos.org/opinions/the...
Those roles are now threatened, write @andrajgarner.bsky.social, @bobkopp.net, @gggarner121.bsky.social, Aimée B. A. Slangen, and Benjamin P. Horton. eos.org/opinions/the...