Tanja Schlemm (she/her)
@tschlemm.bsky.social
I do numerical modelling of ice sheets, iceberg calving and sea ice melange at PIK, exploring their role in climate change and our planet’s future.
Reposted by Tanja Schlemm (she/her)
Finally out! The outcome of a virtual workshop in Feb 2024 with modelers and observationalists to put together data and protocols to include historical changes in ice sheet/ice shelf discharge in CMIP models. Hopefully not too late for some CMIP7 runs!
gmd.copernicus.org/articles/18/...
gmd.copernicus.org/articles/18/...
Datasets and protocols for including anomalous freshwater from melting ice sheets in climate simulations
Abstract. Anomalous freshwater fluxes from the Greenland and Antarctic ice sheets and ice shelves are impacting the surrounding oceans, and we need to be able to account for these effects in climate m...
gmd.copernicus.org
November 7, 2025 at 9:31 PM
Finally out! The outcome of a virtual workshop in Feb 2024 with modelers and observationalists to put together data and protocols to include historical changes in ice sheet/ice shelf discharge in CMIP models. Hopefully not too late for some CMIP7 runs!
gmd.copernicus.org/articles/18/...
gmd.copernicus.org/articles/18/...
Reposted by Tanja Schlemm (she/her)
Yet another record breaking storm supersized by a warming world 😢
Climate change doesn’t create these storms: it makes them worse. They intensify faster, reach higher strengths and dump more rain.
That’s why climate action isn’t just about saving the planet: it’s quite literally about saving US.
Climate change doesn’t create these storms: it makes them worse. They intensify faster, reach higher strengths and dump more rain.
That’s why climate action isn’t just about saving the planet: it’s quite literally about saving US.
Fung-wong: Super typhoon hits Philippines as nearly a million evacuate
Typhoon Fung-wong, with sustained winds of 185 km/h (115mph), made landfall on Sunday evening local time.
www.bbc.com
November 9, 2025 at 2:37 PM
Yet another record breaking storm supersized by a warming world 😢
Climate change doesn’t create these storms: it makes them worse. They intensify faster, reach higher strengths and dump more rain.
That’s why climate action isn’t just about saving the planet: it’s quite literally about saving US.
Climate change doesn’t create these storms: it makes them worse. They intensify faster, reach higher strengths and dump more rain.
That’s why climate action isn’t just about saving the planet: it’s quite literally about saving US.
Reposted by Tanja Schlemm (she/her)
In case you're not aware, Tehran is a city of ~10 MILLION people. "Rivers and reservoirs are running dry, while groundwater sources have been overexploited to sustain agriculture and urban growth."
www.newsweek.com/evacuation-w...
www.newsweek.com/evacuation-w...
Evacuation warning for Iran's capital city
President Masoud Pezeshkian warns Tehran faces a historic water crisis with shortages and possible evacuations.
www.newsweek.com
November 9, 2025 at 3:16 PM
In case you're not aware, Tehran is a city of ~10 MILLION people. "Rivers and reservoirs are running dry, while groundwater sources have been overexploited to sustain agriculture and urban growth."
www.newsweek.com/evacuation-w...
www.newsweek.com/evacuation-w...
Reposted by Tanja Schlemm (she/her)
Suganuma et al provide a thorough examination of the Holocene collapse of the Lützow-Holm Bay ice shelf in Antarctica. They pinpoint when the collapse happened by investigating the beryllium isotopes. When the bay became open ocean, cosmogenic ¹⁰Be could reach the sediments. doi.org/10.1038/s415...
Antarctic ice-shelf collapse in Holocene driven by meltwater release feedbacks - Nature Geoscience
Early Holocene retreat of an ice shelf in East Antarctica was linked to ocean-driven forcing enhanced by ice-sheet meltwater from adjoining regions, as unveiled through the integration of proxy record...
doi.org
November 10, 2025 at 5:14 AM
Suganuma et al provide a thorough examination of the Holocene collapse of the Lützow-Holm Bay ice shelf in Antarctica. They pinpoint when the collapse happened by investigating the beryllium isotopes. When the bay became open ocean, cosmogenic ¹⁰Be could reach the sediments. doi.org/10.1038/s415...
Reposted by Tanja Schlemm (she/her)
#EGU26 is already on its way 🎉!
Abstract submissions are officially open until 15 January 2026, 13:00 CET.
Let the journey begin and submit your abstract NOW!
👉 Visit https://www.egu26.eu/ for more information!
Abstract submissions are officially open until 15 January 2026, 13:00 CET.
Let the journey begin and submit your abstract NOW!
👉 Visit https://www.egu26.eu/ for more information!
November 6, 2025 at 11:30 AM
#EGU26 is already on its way 🎉!
Abstract submissions are officially open until 15 January 2026, 13:00 CET.
Let the journey begin and submit your abstract NOW!
👉 Visit https://www.egu26.eu/ for more information!
Abstract submissions are officially open until 15 January 2026, 13:00 CET.
Let the journey begin and submit your abstract NOW!
👉 Visit https://www.egu26.eu/ for more information!
Reposted by Tanja Schlemm (she/her)
Up to 59% of Antarctic ice shelves may be at risk of disappearing under high-emission scenarios by 2300, according to an analysis of the effect of ocean warming in Nature. This could result in up to 10 m of global sea-level rise. go.nature.com/47Ag4k1 🌊 🧪
November 6, 2025 at 2:12 AM
Up to 59% of Antarctic ice shelves may be at risk of disappearing under high-emission scenarios by 2300, according to an analysis of the effect of ocean warming in Nature. This could result in up to 10 m of global sea-level rise. go.nature.com/47Ag4k1 🌊 🧪
Reposted by Tanja Schlemm (she/her)
"It is the fast and irreversible shrinking, and eventual disappearance, of the mitigation options with every year of increasing greenhouse gas emissions."
www.science.org/doi/10.1126/...
www.science.org/doi/10.1126/...
The Closing Door of Climate Targets
The linear relationship between cumulative carbon emissions and global climate warming implies that as mitigation is delayed, climate targets become unachievable.
www.science.org
November 5, 2025 at 6:10 AM
"It is the fast and irreversible shrinking, and eventual disappearance, of the mitigation options with every year of increasing greenhouse gas emissions."
www.science.org/doi/10.1126/...
www.science.org/doi/10.1126/...
Reposted by Tanja Schlemm (she/her)
New study in Nature by Lin et al shows how the sea-level rise from the melting Ice Age ice (a total of 120 meters rise) ended thousands of years ago.
Until our fossil fuel use started a new phase of rising seas.
Graph shows the global mean rate of sea level rise.
🌊
www.nature.com/articles/s41...
Until our fossil fuel use started a new phase of rising seas.
Graph shows the global mean rate of sea level rise.
🌊
www.nature.com/articles/s41...
November 3, 2025 at 12:09 PM
New study in Nature by Lin et al shows how the sea-level rise from the melting Ice Age ice (a total of 120 meters rise) ended thousands of years ago.
Until our fossil fuel use started a new phase of rising seas.
Graph shows the global mean rate of sea level rise.
🌊
www.nature.com/articles/s41...
Until our fossil fuel use started a new phase of rising seas.
Graph shows the global mean rate of sea level rise.
🌊
www.nature.com/articles/s41...
Reposted by Tanja Schlemm (she/her)
If you are still using NASA's GRACE pages for Antarctic mass budget, you should check out TU Dresden's version - it's a really nice visualisation
data1.geo.tu-dresden.de/ais_gmb/inde...
data1.geo.tu-dresden.de/ais_gmb/inde...
ais_gmb
data1.geo.tu-dresden.de
October 23, 2025 at 5:10 AM
If you are still using NASA's GRACE pages for Antarctic mass budget, you should check out TU Dresden's version - it's a really nice visualisation
data1.geo.tu-dresden.de/ais_gmb/inde...
data1.geo.tu-dresden.de/ais_gmb/inde...
Reposted by Tanja Schlemm (she/her)
The US East Coast - one of the places that ice lost from Greenland ends up. Counterintuitively, places far from where land ice is lost are most impacted by the resulting sea level rise.
The drumbeat remains - mitigation + adaptation.
The drumbeat remains - mitigation + adaptation.
'Another unoccupied house collapsed into the ocean along North Carolina's Outer Banks on Saturday night. It's the 11th house to collapse since mid-September.
In total, 22 homes have collapsed into the ocean in the area since 2020.'
via AccuWeather [X] #ClimateCrisis #SeaLevel
In total, 22 homes have collapsed into the ocean in the area since 2020.'
via AccuWeather [X] #ClimateCrisis #SeaLevel
October 21, 2025 at 7:28 PM
The US East Coast - one of the places that ice lost from Greenland ends up. Counterintuitively, places far from where land ice is lost are most impacted by the resulting sea level rise.
The drumbeat remains - mitigation + adaptation.
The drumbeat remains - mitigation + adaptation.
Reposted by Tanja Schlemm (she/her)
📢 The new #StateOfClimateAction 2025 report finds that keeping the Paris Agreement’s 1.5°C goal within reach
demands massive acceleration in climate action across every sector by 2030. Read the full report:
climateanalytics.org/publications...
demands massive acceleration in climate action across every sector by 2030. Read the full report:
climateanalytics.org/publications...
October 22, 2025 at 4:53 AM
📢 The new #StateOfClimateAction 2025 report finds that keeping the Paris Agreement’s 1.5°C goal within reach
demands massive acceleration in climate action across every sector by 2030. Read the full report:
climateanalytics.org/publications...
demands massive acceleration in climate action across every sector by 2030. Read the full report:
climateanalytics.org/publications...
Reposted by Tanja Schlemm (she/her)
🚨 New paper alert!
Research by postdoc Maaike Izeboud from the bglacier group in Nature Climate Change 🎉
Using 20 years of satellite data, she mapped Antarctic ice shelf fractures and showed how damage rises under high emissions but stabilises in low-emission futures
www.nature.com/articles/s41...
Research by postdoc Maaike Izeboud from the bglacier group in Nature Climate Change 🎉
Using 20 years of satellite data, she mapped Antarctic ice shelf fractures and showed how damage rises under high emissions but stabilises in low-emission futures
www.nature.com/articles/s41...
Damage development on Antarctic ice shelves sensitive to climate warming - Nature Climate Change
Damages such as crevasses or cracks can be early indicators of ice shelf weakening. Here, the authors quantify changes in damage structures in Antarctic ice sheets, which show sensitivity to warming
www.nature.com
October 17, 2025 at 1:27 PM
🚨 New paper alert!
Research by postdoc Maaike Izeboud from the bglacier group in Nature Climate Change 🎉
Using 20 years of satellite data, she mapped Antarctic ice shelf fractures and showed how damage rises under high emissions but stabilises in low-emission futures
www.nature.com/articles/s41...
Research by postdoc Maaike Izeboud from the bglacier group in Nature Climate Change 🎉
Using 20 years of satellite data, she mapped Antarctic ice shelf fractures and showed how damage rises under high emissions but stabilises in low-emission futures
www.nature.com/articles/s41...
Reposted by Tanja Schlemm (she/her)
I was interviewed for this great piece about sea level rise.
Solid reporting here on the scientific controversy, but I like that Evan ended with my bigger picture quote that a lot of the controversy doesn't really matter because by 2100, we will be talking about a radically different coastline.
Solid reporting here on the scientific controversy, but I like that Evan ended with my bigger picture quote that a lot of the controversy doesn't really matter because by 2100, we will be talking about a radically different coastline.
How Soon Will the Seas Rise? | Quanta Magazine
The uniquely vulnerable West Antarctic Ice Sheet holds enough water to raise global sea levels by 5 meters. But when that will happen — and how fast — is anything but settled.
www.quantamagazine.org
October 20, 2025 at 8:59 PM
I was interviewed for this great piece about sea level rise.
Solid reporting here on the scientific controversy, but I like that Evan ended with my bigger picture quote that a lot of the controversy doesn't really matter because by 2100, we will be talking about a radically different coastline.
Solid reporting here on the scientific controversy, but I like that Evan ended with my bigger picture quote that a lot of the controversy doesn't really matter because by 2100, we will be talking about a radically different coastline.
Reposted by Tanja Schlemm (she/her)
Arctic extremes are accelerating.
Rare climate extremes (eg heatwaves, sea ice loss, ice sheet melt) are now common. Since 2000, some have jumped >80%.
Warming is “pushing” the system to a new state, variability “triggers” extremes.
(Review)
www.nature.com/articles/s43...
Rare climate extremes (eg heatwaves, sea ice loss, ice sheet melt) are now common. Since 2000, some have jumped >80%.
Warming is “pushing” the system to a new state, variability “triggers” extremes.
(Review)
www.nature.com/articles/s43...
Weather and climate extremes in a changing Arctic - Nature Reviews Earth & Environment
Rare and extreme climate events have increasingly occurred in the Arctic since ~2000. This Review outlines the observed and projected changes in atmospheric, oceanic and cryospheric extremes and expla...
www.nature.com
October 21, 2025 at 5:13 AM
Arctic extremes are accelerating.
Rare climate extremes (eg heatwaves, sea ice loss, ice sheet melt) are now common. Since 2000, some have jumped >80%.
Warming is “pushing” the system to a new state, variability “triggers” extremes.
(Review)
www.nature.com/articles/s43...
Rare climate extremes (eg heatwaves, sea ice loss, ice sheet melt) are now common. Since 2000, some have jumped >80%.
Warming is “pushing” the system to a new state, variability “triggers” extremes.
(Review)
www.nature.com/articles/s43...
Reposted by Tanja Schlemm (she/her)
Carbon offsets, though widely used, often fail to deliver real emission cuts. They undermine global climate goals by enabling polluters to avoid reducing fossil-fuel use.
Carbon credits are failing to help with climate change — here’s why
The idea that emissions can be offset through projects that claim to avoid releases or to remove carbon dioxide from the atmosphere is fatally flawed.
www.nature.com
October 17, 2025 at 8:26 AM
Carbon offsets, though widely used, often fail to deliver real emission cuts. They undermine global climate goals by enabling polluters to avoid reducing fossil-fuel use.
Reposted by Tanja Schlemm (she/her)
🚨 New maps alert!
Sheets 1–7 of the SCAR Air Operations Planning Maps Series are now live in our catalogue 🗺️✈️ @scar-antarctic.bsky.social
Explore detailed Antarctic mapping, designed to support science across the continent.
📍 Browse and download here: data.bas.ac.uk/collections/...
1/2
Sheets 1–7 of the SCAR Air Operations Planning Maps Series are now live in our catalogue 🗺️✈️ @scar-antarctic.bsky.social
Explore detailed Antarctic mapping, designed to support science across the continent.
📍 Browse and download here: data.bas.ac.uk/collections/...
1/2
SCAR Air Operations Planning Maps
A collection of SCAR Air Operations Planning Maps produced by the Mapping and Geographic Information Centre, British Antarctic Survey.
data.bas.ac.uk
October 17, 2025 at 3:57 PM
🚨 New maps alert!
Sheets 1–7 of the SCAR Air Operations Planning Maps Series are now live in our catalogue 🗺️✈️ @scar-antarctic.bsky.social
Explore detailed Antarctic mapping, designed to support science across the continent.
📍 Browse and download here: data.bas.ac.uk/collections/...
1/2
Sheets 1–7 of the SCAR Air Operations Planning Maps Series are now live in our catalogue 🗺️✈️ @scar-antarctic.bsky.social
Explore detailed Antarctic mapping, designed to support science across the continent.
📍 Browse and download here: data.bas.ac.uk/collections/...
1/2
Reposted by Tanja Schlemm (she/her)
24 years of satellite data reveal a dynamic, cyclic pattern of ice shelf damage across Antarctica.
Damage, linked to flow acceleration, strain, and thinning, shows strong sensitivity to climate warming, suggesting current models may underestimate future retreat.
www.nature.com/articles/s41...
Damage, linked to flow acceleration, strain, and thinning, shows strong sensitivity to climate warming, suggesting current models may underestimate future retreat.
www.nature.com/articles/s41...
Damage development on Antarctic ice shelves sensitive to climate warming - Nature Climate Change
Damages such as crevasses or cracks can be early indicators of ice shelf weakening. Here, the authors quantify changes in damage structures in Antarctic ice sheets, which show sensitivity to warming
www.nature.com
October 19, 2025 at 4:13 AM
24 years of satellite data reveal a dynamic, cyclic pattern of ice shelf damage across Antarctica.
Damage, linked to flow acceleration, strain, and thinning, shows strong sensitivity to climate warming, suggesting current models may underestimate future retreat.
www.nature.com/articles/s41...
Damage, linked to flow acceleration, strain, and thinning, shows strong sensitivity to climate warming, suggesting current models may underestimate future retreat.
www.nature.com/articles/s41...
Reposted by Tanja Schlemm (she/her)
UGH! When will it end. 😭
"Effective October 15, 2025, due to non-renewed funding, NSIDC has suspended or reduced several Sea Ice Today tools and services."
nsidc.org/data/user-re...
"Effective October 15, 2025, due to non-renewed funding, NSIDC has suspended or reduced several Sea Ice Today tools and services."
nsidc.org/data/user-re...
October 15, 2025 at 6:54 PM
UGH! When will it end. 😭
"Effective October 15, 2025, due to non-renewed funding, NSIDC has suspended or reduced several Sea Ice Today tools and services."
nsidc.org/data/user-re...
"Effective October 15, 2025, due to non-renewed funding, NSIDC has suspended or reduced several Sea Ice Today tools and services."
nsidc.org/data/user-re...
Reposted by Tanja Schlemm (she/her)
In Greenland's Scoresby Sund, a deep blue iceberg seems to glow from within as it is illuminated by the late afternoon sun, while glittering ice fragments float within its soft reflections.
#photography #nature #bluesky #naturephotography
#landscapephotography #landscape #sunset #travel
#photography #nature #bluesky #naturephotography
#landscapephotography #landscape #sunset #travel
October 14, 2025 at 12:11 PM
In Greenland's Scoresby Sund, a deep blue iceberg seems to glow from within as it is illuminated by the late afternoon sun, while glittering ice fragments float within its soft reflections.
#photography #nature #bluesky #naturephotography
#landscapephotography #landscape #sunset #travel
#photography #nature #bluesky #naturephotography
#landscapephotography #landscape #sunset #travel
Reposted by Tanja Schlemm (she/her)
We have a new paper out! Work with @leighstearns.bsky.social, @laserglaciers.bsky.social, and Sid Shankar studying the potential of new ICEYE SAR satellite imagery to study the dynamic behaviour of ice mélange around the margins of the Greenland Ice Sheet.
Read more here: tinyurl.com/mtc94juu
Read more here: tinyurl.com/mtc94juu
October 14, 2025 at 7:25 PM
We have a new paper out! Work with @leighstearns.bsky.social, @laserglaciers.bsky.social, and Sid Shankar studying the potential of new ICEYE SAR satellite imagery to study the dynamic behaviour of ice mélange around the margins of the Greenland Ice Sheet.
Read more here: tinyurl.com/mtc94juu
Read more here: tinyurl.com/mtc94juu
Reposted by Tanja Schlemm (she/her)
This post buries the lede: "Push for what you can't control alone. Vote for leaders who support climate-smart investments; demand action from those already in power; sign petitions; and join collective campaigns that drive change at scale."
🌍 80% of people worldwide want stronger #ClimateAction.
But not all choices are equal. WRI Climate research ranks 19 ways to help the climate, showing which actions make the biggest impact.
Explore the list: bit.ly/4q0pWvC
But not all choices are equal. WRI Climate research ranks 19 ways to help the climate, showing which actions make the biggest impact.
Explore the list: bit.ly/4q0pWvC
October 9, 2025 at 5:03 PM
This post buries the lede: "Push for what you can't control alone. Vote for leaders who support climate-smart investments; demand action from those already in power; sign petitions; and join collective campaigns that drive change at scale."
Reposted by Tanja Schlemm (she/her)
Our new Global Tipping Points report is out today: global-tipping-points.org
Read the whole thing here: global-tipping-points.org/resources-gt...
#GTPR2025 #COP30
@exeter.ac.uk @wwf.org.uk @gsiexeter.bsky.social
@pik-potsdam.bsky.social @wwfbrasil.bsky.social
Read the whole thing here: global-tipping-points.org/resources-gt...
#GTPR2025 #COP30
@exeter.ac.uk @wwf.org.uk @gsiexeter.bsky.social
@pik-potsdam.bsky.social @wwfbrasil.bsky.social
Global Tipping Points | understanding risks & their potential impact
Harmful tipping points in the natural world threaten humanity by disrupting life support systems and societal stability.
global-tipping-points.org
October 13, 2025 at 8:15 AM
Our new Global Tipping Points report is out today: global-tipping-points.org
Read the whole thing here: global-tipping-points.org/resources-gt...
#GTPR2025 #COP30
@exeter.ac.uk @wwf.org.uk @gsiexeter.bsky.social
@pik-potsdam.bsky.social @wwfbrasil.bsky.social
Read the whole thing here: global-tipping-points.org/resources-gt...
#GTPR2025 #COP30
@exeter.ac.uk @wwf.org.uk @gsiexeter.bsky.social
@pik-potsdam.bsky.social @wwfbrasil.bsky.social
Reposted by Tanja Schlemm (she/her)
Mountain glaciers are warming more slowly than their surroundings because of changes in debris cover and wind speed, which insulate them. However, new statistical analysis suggests that this "decoupling" will end in the coming decades, when they will melt more rapidly
share.google/LO9YwZ2JrHsj...
share.google/LO9YwZ2JrHsj...
Mountain glaciers recouple to atmospheric warming over the twenty-first century - Nature Climate Change
It has been argued that air temperatures over mountain glaciers are decoupled from surrounding warming, which could slow down melting. Here the authors show that this effect will weaken with future glacier retreat, leading to a recoupling of temperatures from the 2030s onwards.
share.google
October 11, 2025 at 10:54 AM
Mountain glaciers are warming more slowly than their surroundings because of changes in debris cover and wind speed, which insulate them. However, new statistical analysis suggests that this "decoupling" will end in the coming decades, when they will melt more rapidly
share.google/LO9YwZ2JrHsj...
share.google/LO9YwZ2JrHsj...
Reposted by Tanja Schlemm (she/her)
Wait, I thought AI was going to solve climate change?
October 11, 2025 at 11:28 AM
Wait, I thought AI was going to solve climate change?
Reposted by Tanja Schlemm (she/her)
NEW: Biofuels globally emit more than the fossil fuels they replace, our latest study shows.
The first-of-a-kind study looks at global biofuels production today and the potential impacts of government biofuel targets.
🧵⤵️
The first-of-a-kind study looks at global biofuels production today and the potential impacts of government biofuel targets.
🧵⤵️
October 9, 2025 at 6:00 AM
NEW: Biofuels globally emit more than the fossil fuels they replace, our latest study shows.
The first-of-a-kind study looks at global biofuels production today and the potential impacts of government biofuel targets.
🧵⤵️
The first-of-a-kind study looks at global biofuels production today and the potential impacts of government biofuel targets.
🧵⤵️