Lamont-Doherty Earth Observatory
@lamont.columbia.edu
Building fundamental knowledge about the origin, evolution, and future of our planet since 1949 (lamont.columbia.edu).
Pinned
On Jan 29, join Columbia School of the Arts for Being Treely, an interdisciplinary conversation on rethinking our relationship to trees and plants with Nicole Davi (LDEO Tree Ring Lab), Patricia Dailey, Miya Masaoka, Rachel Grace Newman, and darylina powderface. 🎟️ https://bit.ly/4bFmGB0
Part of Pine Island Glacier collapsed several years ago, forming an unstable inlet where no ship had sailed...until scientists aboard the icebreaker Araon took the risky voyage, including oceanographer Pierre Dutrieux of British Antarctic Survey and LDEO. Via New York Times. https://nyti.ms/4sQ2Jxt
Sailing Through a ‘Death Trap’ Once Covered by Antarctic Ice
www.nytimes.com
January 21, 2026 at 10:13 PM
Part of Pine Island Glacier collapsed several years ago, forming an unstable inlet where no ship had sailed...until scientists aboard the icebreaker Araon took the risky voyage, including oceanographer Pierre Dutrieux of British Antarctic Survey and LDEO. Via New York Times. https://nyti.ms/4sQ2Jxt
New study by LDEO's Lauren Lewright, Jacqueline Austermann, James Davis, and colleagues finds that as Greenland’s ice sheet rapidly melts, causing sea level rise elsewhere, sea levels will fall along parts of the island, posing major problems. Via Science. https://bit.ly/4a31YK6
As Greenland loses ice, global sea levels will rise—and its own will fall
The island is rebounding from ice melt so fast that scientists are rethinking how Earth’s interior works
bit.ly
January 20, 2026 at 8:52 PM
New study by LDEO's Lauren Lewright, Jacqueline Austermann, James Davis, and colleagues finds that as Greenland’s ice sheet rapidly melts, causing sea level rise elsewhere, sea levels will fall along parts of the island, posing major problems. Via Science. https://bit.ly/4a31YK6
Reposted by Lamont-Doherty Earth Observatory
New analysis of air quality data from the past 70 years by Robert Field, Olivia Clifton, Konstantinos Tsigaridis of NASA GISS and co-authors shows that Canada's record wildfire smoke in 2023 is part of a broader, continent-wide trend toward smokier skies: https://bit.ly/3NSuXro
January 20, 2026 at 7:45 PM
New analysis of air quality data from the past 70 years by Robert Field, Olivia Clifton, Konstantinos Tsigaridis of NASA GISS and co-authors shows that Canada's record wildfire smoke in 2023 is part of a broader, continent-wide trend toward smokier skies: https://bit.ly/3NSuXro
On Jan 29, join Columbia School of the Arts for Being Treely, an interdisciplinary conversation on rethinking our relationship to trees and plants with Nicole Davi (LDEO Tree Ring Lab), Patricia Dailey, Miya Masaoka, Rachel Grace Newman, and darylina powderface. 🎟️ https://bit.ly/4bFmGB0
January 20, 2026 at 5:53 PM
On Jan 29, join Columbia School of the Arts for Being Treely, an interdisciplinary conversation on rethinking our relationship to trees and plants with Nicole Davi (LDEO Tree Ring Lab), Patricia Dailey, Miya Masaoka, Rachel Grace Newman, and darylina powderface. 🎟️ https://bit.ly/4bFmGB0
Led by LDEO education & outreach officer Sharon Cooper, TRACX program immersed grades 5–12 educators from bustling cities to remote towns in ocean research alongside scientists, empowering them to connect classroom learning with real-world science for their students. 🌊 https://bit.ly/4qVMNbq
January 15, 2026 at 9:50 PM
Led by LDEO education & outreach officer Sharon Cooper, TRACX program immersed grades 5–12 educators from bustling cities to remote towns in ocean research alongside scientists, empowering them to connect classroom learning with real-world science for their students. 🌊 https://bit.ly/4qVMNbq
Reposted by Lamont-Doherty Earth Observatory
📣 New paper with Lorenzo Polvani published in @agu.org GRL!
Increasing Frequency and Persistence of the Summertime Greenland High Regime Not Captured by a Seasonal Prediction Model Very Large Ensemble
Open access: doi.org/10.1029/2025...
@earthscista.bsky.social @lamont.columbia.edu
Increasing Frequency and Persistence of the Summertime Greenland High Regime Not Captured by a Seasonal Prediction Model Very Large Ensemble
Open access: doi.org/10.1029/2025...
@earthscista.bsky.social @lamont.columbia.edu
January 10, 2026 at 11:47 AM
📣 New paper with Lorenzo Polvani published in @agu.org GRL!
Increasing Frequency and Persistence of the Summertime Greenland High Regime Not Captured by a Seasonal Prediction Model Very Large Ensemble
Open access: doi.org/10.1029/2025...
@earthscista.bsky.social @lamont.columbia.edu
Increasing Frequency and Persistence of the Summertime Greenland High Regime Not Captured by a Seasonal Prediction Model Very Large Ensemble
Open access: doi.org/10.1029/2025...
@earthscista.bsky.social @lamont.columbia.edu
EPA will no longer apply a dollar amount to health benefits from clean air. "Improving air pollution...has been shown to be one of the most cost effective ways of improving health and saving lives," says LDEO geochemist Steven Chillrud. Via ABC News. https://bit.ly/4by6DVC
What to know about the new EPA rule on air pollution
A new rule by the EPA to no longer consider the economic cost of human health from two major air pollutants in its regulations will pave the way for more pollution.
abcnews.go.com
January 14, 2026 at 5:49 PM
EPA will no longer apply a dollar amount to health benefits from clean air. "Improving air pollution...has been shown to be one of the most cost effective ways of improving health and saving lives," says LDEO geochemist Steven Chillrud. Via ABC News. https://bit.ly/4by6DVC
📣 Job Alert! Lamont-Doherty Earth Observatory seeks an Associate Research Scientist to conduct independent research in applications of machine learning to seismology, share results with the public, prepare publications and reports, and more. ➡️ Learn more/apply/share: https://bit.ly/49oYPCQ
January 12, 2026 at 10:09 PM
📣 Job Alert! Lamont-Doherty Earth Observatory seeks an Associate Research Scientist to conduct independent research in applications of machine learning to seismology, share results with the public, prepare publications and reports, and more. ➡️ Learn more/apply/share: https://bit.ly/49oYPCQ
Climate clues beneath Antarctic ice, freshwater reserves in Bangladesh, glacier monitoring, role of glacial melt in earthquakes, Lamont at #AGU25, Hudson River Field Station 2025 sampling recap, summer opportunities for HS students, flash flood preparedness, more! ➡️ https://bit.ly/3YRlfIp
January 9, 2026 at 9:50 PM
Climate clues beneath Antarctic ice, freshwater reserves in Bangladesh, glacier monitoring, role of glacial melt in earthquakes, Lamont at #AGU25, Hudson River Field Station 2025 sampling recap, summer opportunities for HS students, flash flood preparedness, more! ➡️ https://bit.ly/3YRlfIp
Reposted by Lamont-Doherty Earth Observatory
@lamont.columbia.edu, recent post-doc researcher @mdtanker.bsky.social and #LDEOPolarGeophysics published this superb work in EGUTheCryosphere: Gravity inversion for sub-ice shelf bathymetry: strengths, limitations, and insights from synthetic modeling 🇦🇶 tc.copernicus.org/articles/19/...
Gravity inversion for sub-ice shelf bathymetry: strengths, limitations, and insights from synthetic modeling
Abstract. Sub-ice-shelf bathymetry strongly influences ice shelf stability by guiding melt-inducing water masses and through pinning points that resist the flow of the overriding ice. Collecting sub-i...
tc.copernicus.org
January 8, 2026 at 9:39 PM
@lamont.columbia.edu, recent post-doc researcher @mdtanker.bsky.social and #LDEOPolarGeophysics published this superb work in EGUTheCryosphere: Gravity inversion for sub-ice shelf bathymetry: strengths, limitations, and insights from synthetic modeling 🇦🇶 tc.copernicus.org/articles/19/...
Reposted by Lamont-Doherty Earth Observatory
#ClimateModels can't match #LongTerm observed changes in the #TropicalPacific zonal #SSTGradient, implying model responses to growing radiative forcing from #GHG is diverging. #ClimateChange #CMIP6 @hannah-byrne.bsky.social @lamont.columbia.edu @climate.columbia.edu
www.nature.com/articles/s41...
www.nature.com/articles/s41...
January 9, 2026 at 10:43 AM
#ClimateModels can't match #LongTerm observed changes in the #TropicalPacific zonal #SSTGradient, implying model responses to growing radiative forcing from #GHG is diverging. #ClimateChange #CMIP6 @hannah-byrne.bsky.social @lamont.columbia.edu @climate.columbia.edu
www.nature.com/articles/s41...
www.nature.com/articles/s41...
Reposted by Lamont-Doherty Earth Observatory
A fews days left to submit to our #EGU26 session with @mattpriestley.bsky.social A. Ciullo @hcbloomfield19.bsky.social @natalieslord.bsky.social
with solicited talks E. Galloway and F. Pianosi.
Submit & Details: www.egu26.eu/session/57506
@iiasa.ac.at @lamont.columbia.edu @climate.columbia.edu
with solicited talks E. Galloway and F. Pianosi.
Submit & Details: www.egu26.eu/session/57506
@iiasa.ac.at @lamont.columbia.edu @climate.columbia.edu
January 9, 2026 at 1:25 PM
A fews days left to submit to our #EGU26 session with @mattpriestley.bsky.social A. Ciullo @hcbloomfield19.bsky.social @natalieslord.bsky.social
with solicited talks E. Galloway and F. Pianosi.
Submit & Details: www.egu26.eu/session/57506
@iiasa.ac.at @lamont.columbia.edu @climate.columbia.edu
with solicited talks E. Galloway and F. Pianosi.
Submit & Details: www.egu26.eu/session/57506
@iiasa.ac.at @lamont.columbia.edu @climate.columbia.edu
🧵 1/2 Climate Justice Now "is an ambitious, clear-eyed exploration of how rising seas, migration, & inequality intersect—and how researchers and activists can move beyond narrow...silos to find real solutions," writes Jack Austin, Medill Reports: climatechange.medill.northwestern.edu/inside-clima...
January 9, 2026 at 3:14 PM
🧵 1/2 Climate Justice Now "is an ambitious, clear-eyed exploration of how rising seas, migration, & inequality intersect—and how researchers and activists can move beyond narrow...silos to find real solutions," writes Jack Austin, Medill Reports: climatechange.medill.northwestern.edu/inside-clima...
GreenDrill project co-led by LDEO's Joerg Schaefer & Uni at Buffalo's Jason Briner has pubbed new findings that Greenland's Prudhoe Dome had completely melted within past 10,000 years and could suffer the same fate amid modern climate change. Via Washington Post. https://wapo.st/3N8wQQy
Scientists just got some ancient clues about future sea-level rise — and it’s bad news
Rock samples collected from the Greenland ice sheet’s Prudhoe Dome show it completely melted in the past 10,000 years — and could vanish again amid climate change.
www.washingtonpost.com
January 7, 2026 at 6:12 PM
GreenDrill project co-led by LDEO's Joerg Schaefer & Uni at Buffalo's Jason Briner has pubbed new findings that Greenland's Prudhoe Dome had completely melted within past 10,000 years and could suffer the same fate amid modern climate change. Via Washington Post. https://wapo.st/3N8wQQy
🪟 Window strikes are the leading cause of human-caused bird mortality. 🐦 With support from the Rockland Audubon Society and donors, LDEO has installed Feather Friendly Bird Collision Deterrent Markers on Monell Building with the help of CoolVu Solutions Manhattan. 💚 https://lamont.columbia.edu/leisc
January 1, 2026 at 9:15 PM
🪟 Window strikes are the leading cause of human-caused bird mortality. 🐦 With support from the Rockland Audubon Society and donors, LDEO has installed Feather Friendly Bird Collision Deterrent Markers on Monell Building with the help of CoolVu Solutions Manhattan. 💚 https://lamont.columbia.edu/leisc
Reposted by Lamont-Doherty Earth Observatory
✨ In 2025, we welcomed Alexis Abramson as our new dean, celebrated our graduating class of leaders, launched the first MS in Climate Finance in the US, all working to build a more just, sustainable future for our planet. 🦋 State of the Planet shares these 2025 highlights: https://bit.ly/3MSgjAh
December 31, 2025 at 5:53 PM
✨ In 2025, we welcomed Alexis Abramson as our new dean, celebrated our graduating class of leaders, launched the first MS in Climate Finance in the US, all working to build a more just, sustainable future for our planet. 🦋 State of the Planet shares these 2025 highlights: https://bit.ly/3MSgjAh
At #AGU25, PhD student Apollonia Arellano of LDEO shared research on better understanding Atlantic Meridional Overturning Circulation (AMOC), the system of ocean currents that plays a vital role in regulating climate. ➡️ Lamont at AGU25: https://bit.ly/48VGXQ1
https://bit.ly/4sdFqO9
https://bit.ly/4sdFqO9
Apollonia Arellano at AGU: Reconstructing Deep Ocean Circulation in the Eastern North Atlantic
YouTube video by Lamont-Doherty Earth Observatory
youtube.com
December 31, 2025 at 5:52 PM
At #AGU25, PhD student Apollonia Arellano of LDEO shared research on better understanding Atlantic Meridional Overturning Circulation (AMOC), the system of ocean currents that plays a vital role in regulating climate. ➡️ Lamont at AGU25: https://bit.ly/48VGXQ1
https://bit.ly/4sdFqO9
https://bit.ly/4sdFqO9
At #AGU25, Macy Matthews of LDEO shared research on how deep-ocean circulation responded to climate variations 800,000-300,000 yrs ago from some of coldest, longest ice ages to warm, CO₂-rich interglacial periods. ➡️ Lamont at AGU25: https://bit.ly/48VGXQ1
https://bit.ly/4jel9Uh
https://bit.ly/4jel9Uh
December 31, 2025 at 5:47 PM
At #AGU25, Macy Matthews of LDEO shared research on how deep-ocean circulation responded to climate variations 800,000-300,000 yrs ago from some of coldest, longest ice ages to warm, CO₂-rich interglacial periods. ➡️ Lamont at AGU25: https://bit.ly/48VGXQ1
https://bit.ly/4jel9Uh
https://bit.ly/4jel9Uh
At #AGU25, postdoc Arijeet Mitra of LDEO shared research on uranium in groundwater in South Dakota where many rural communities, including Native American reservations, rely on wells for drinking water. ➡️ Lamont at AGU25: https://lamont.columbia.edu/agu25
https://youtube.com/shorts/-w5i40tkjqo
https://youtube.com/shorts/-w5i40tkjqo
Arijeet Mitra at AGU: Uranium in Groundwater in Northern Plains Aquifers
YouTube video by Lamont-Doherty Earth Observatory
youtube.com
December 30, 2025 at 5:49 PM
At #AGU25, postdoc Arijeet Mitra of LDEO shared research on uranium in groundwater in South Dakota where many rural communities, including Native American reservations, rely on wells for drinking water. ➡️ Lamont at AGU25: https://lamont.columbia.edu/agu25
https://youtube.com/shorts/-w5i40tkjqo
https://youtube.com/shorts/-w5i40tkjqo
At #AGU25, PhD student Meritxell Colet of LDEO shared research on seismicity of Tanganyika-Rukwa Rift Zone in East Africa using machine learning to identify mechanisms that drive strain release leading to earthquakes. ➡️ Lamont at AGU25: https://bit.ly/48VGXQ1
https://bit.ly/4sipw4P
https://bit.ly/4sipw4P
Meritxell Colet at AGU: Studying Seismicity in East Africa Using Machine Learning
YouTube video by Lamont-Doherty Earth Observatory
youtube.com
December 29, 2025 at 6:15 PM
At #AGU25, PhD student Meritxell Colet of LDEO shared research on seismicity of Tanganyika-Rukwa Rift Zone in East Africa using machine learning to identify mechanisms that drive strain release leading to earthquakes. ➡️ Lamont at AGU25: https://bit.ly/48VGXQ1
https://bit.ly/4sipw4P
https://bit.ly/4sipw4P
At #AGU25, postdoc Clara Chang of LDEO shared discovery of native desert plant that removes significant levels of metals from soil of an abandoned uranium mine inside Arizona's Petrified Forest National Park, raising environmental and public health concerns. ➡️ Lamont at AGU25: https://bit.ly/48VGXQ1
December 28, 2025 at 6:37 PM
At #AGU25, postdoc Clara Chang of LDEO shared discovery of native desert plant that removes significant levels of metals from soil of an abandoned uranium mine inside Arizona's Petrified Forest National Park, raising environmental and public health concerns. ➡️ Lamont at AGU25: https://bit.ly/48VGXQ1
At #AGU25, we stopped by to talk with postdoc Abhishek Anand of LDEO about his research on the short-term effects of New York City's congestion pricing policy (implemented on January 5, 2025) on local air pollution. ➡️ Lamont at AGU25: https://bit.ly/48VGXQ1
https://bit.ly/4q7Be0A
https://bit.ly/4q7Be0A
Abhishek Anand at AGU: Impacts of NYC's Congestion Pricing on Air Quality
YouTube video by Lamont-Doherty Earth Observatory
youtube.com
December 27, 2025 at 8:55 PM
At #AGU25, we stopped by to talk with postdoc Abhishek Anand of LDEO about his research on the short-term effects of New York City's congestion pricing policy (implemented on January 5, 2025) on local air pollution. ➡️ Lamont at AGU25: https://bit.ly/48VGXQ1
https://bit.ly/4q7Be0A
https://bit.ly/4q7Be0A
At #AGU25, we stopped by to talk with PhD student Yi Xia of LDEO about her research using "storylines" to determine how different, but plausible, sea surface temperature patterns could shape the activity of tropical cyclones in the near future. ➡️ Lamont at AGU25: https://lamont.columbia.edu/agu25
December 24, 2025 at 5:47 PM
At #AGU25, we stopped by to talk with PhD student Yi Xia of LDEO about her research using "storylines" to determine how different, but plausible, sea surface temperature patterns could shape the activity of tropical cyclones in the near future. ➡️ Lamont at AGU25: https://lamont.columbia.edu/agu25
At #AGU25, we stopped by to talk with recent PhD Claire Jasper of LDEO about her research using sediment cores from North Atlantic and Southern Ocean from the early Pleistocene to investigate the timing and pacing of iceberg discharge. ➡️ Lamont at AGU25: https://bit.ly/48VGXQ1
https://bit.ly/4jarLDb
https://bit.ly/4jarLDb
Claire Jasper at AGU: Iceberg Discharge Events in the Early Pleistocene
YouTube video by Lamont-Doherty Earth Observatory
youtube.com
December 23, 2025 at 5:46 PM
At #AGU25, we stopped by to talk with recent PhD Claire Jasper of LDEO about her research using sediment cores from North Atlantic and Southern Ocean from the early Pleistocene to investigate the timing and pacing of iceberg discharge. ➡️ Lamont at AGU25: https://bit.ly/48VGXQ1
https://bit.ly/4jarLDb
https://bit.ly/4jarLDb
Reposted by Lamont-Doherty Earth Observatory
🍃 2025 was another historic year for climate impacts, but also a year marked by meaningful collaboration to build a more sustainable and just future for our planet. 📣 Check out this past year's top stories from State of the Planet: https://bit.ly/4jkigkX
December 22, 2025 at 5:48 PM
🍃 2025 was another historic year for climate impacts, but also a year marked by meaningful collaboration to build a more sustainable and just future for our planet. 📣 Check out this past year's top stories from State of the Planet: https://bit.ly/4jkigkX