Sanam Vardag
@sanamnv.bsky.social
Atmospheric physicist, carbon cycle, greenhouse gases, atmospheric transport, urban emissions, semi-arid regions, climate action science
@Institute of Environmental Physics and @Heidelberg Center for the Environment, Heidelberg University
@Institute of Environmental Physics and @Heidelberg Center for the Environment, Heidelberg University
My dear colleague Martin Kesternich is offering a PhD/Postdoc position in Environmental Economics @ Uni Augsburg starting Feb 2026
Interdisciplinary work with us @ Environmental Physics on the value of granular climate data possible 🔬
www.uni-augsburg.de/de/jobs-und-...
#climateactionscience
Interdisciplinary work with us @ Environmental Physics on the value of granular climate data possible 🔬
www.uni-augsburg.de/de/jobs-und-...
#climateactionscience
Wissenschaftliche Mitarbeiterin / Wissenschaftlicher Mitarbeiter (m/w/d) als Doktorandin / Doktorand, Wirtschaftswissenschaftliche Fakultät
www.uni-augsburg.de
November 2, 2025 at 12:36 PM
My dear colleague Martin Kesternich is offering a PhD/Postdoc position in Environmental Economics @ Uni Augsburg starting Feb 2026
Interdisciplinary work with us @ Environmental Physics on the value of granular climate data possible 🔬
www.uni-augsburg.de/de/jobs-und-...
#climateactionscience
Interdisciplinary work with us @ Environmental Physics on the value of granular climate data possible 🔬
www.uni-augsburg.de/de/jobs-und-...
#climateactionscience
Reposted by Sanam Vardag
☀️New node up in Mannheim Sandhofen Pumpwerk 🚿
It marks the furthest north node of the UNICORN network.
Thanks to the Pumpwerk team and City of Mannheim for great support!
#ClimateAction #TrackingEmissions
It marks the furthest north node of the UNICORN network.
Thanks to the Pumpwerk team and City of Mannheim for great support!
#ClimateAction #TrackingEmissions
October 11, 2025 at 6:41 AM
☀️New node up in Mannheim Sandhofen Pumpwerk 🚿
It marks the furthest north node of the UNICORN network.
Thanks to the Pumpwerk team and City of Mannheim for great support!
#ClimateAction #TrackingEmissions
It marks the furthest north node of the UNICORN network.
Thanks to the Pumpwerk team and City of Mannheim for great support!
#ClimateAction #TrackingEmissions
🌱💦New insights into carbon–water coupling in dryland ecosystems:
We quantified how soil moisture and temperature regulate respiration across Australia, revealing nonlinear responses.
This marks the final publication of Eva-Marie Metz’s PhD: shorturl.at/Gq10h
Eva, its been a pleasure☀️ All the best!
We quantified how soil moisture and temperature regulate respiration across Australia, revealing nonlinear responses.
This marks the final publication of Eva-Marie Metz’s PhD: shorturl.at/Gq10h
Eva, its been a pleasure☀️ All the best!
Responses of terrestrial ecosystem respiration to soil moisture across Australia - IOPscience
Responses of terrestrial ecosystem respiration to soil moisture across Australia, Metz, Eva-Marie, Vardag, Sanam N, Feldman, Andrew F, Poulter, Benjamin, Colligan, Thomas, Fischer-Femal, Brenden J, Bu...
shorturl.at
October 4, 2025 at 12:45 PM
🌱💦New insights into carbon–water coupling in dryland ecosystems:
We quantified how soil moisture and temperature regulate respiration across Australia, revealing nonlinear responses.
This marks the final publication of Eva-Marie Metz’s PhD: shorturl.at/Gq10h
Eva, its been a pleasure☀️ All the best!
We quantified how soil moisture and temperature regulate respiration across Australia, revealing nonlinear responses.
This marks the final publication of Eva-Marie Metz’s PhD: shorturl.at/Gq10h
Eva, its been a pleasure☀️ All the best!
WMO’s GAW programme put together guidelines to help cities better measure and track their greenhouse gas emissions. Proud to have contributed as a chapter lead author to this global community effort.
Guidelines: doi.org/10.59327/WMO...
#climateactionscience #urbanemissions
Guidelines: doi.org/10.59327/WMO...
#climateactionscience #urbanemissions
Human Verification
doi.org
October 1, 2025 at 6:34 PM
WMO’s GAW programme put together guidelines to help cities better measure and track their greenhouse gas emissions. Proud to have contributed as a chapter lead author to this global community effort.
Guidelines: doi.org/10.59327/WMO...
#climateactionscience #urbanemissions
Guidelines: doi.org/10.59327/WMO...
#climateactionscience #urbanemissions
New paper: 🌇 Combining column and in-situ observations helps reduce uncertainties in urban CH₄ emissions and better capture trends. Thanks Jun and all coauthors for the great teamwork!
doi.org/10.1029/2025...
doi.org/10.1029/2025...
Inverse Estimation of Urban Methane Emissions Using Both Column and Surface Observations: An OSSE Study
We present an observing system simulation experiment to evaluate a potential measurement network for estimating urban methane emissions Urban methane emissions are assessed using combined column ...
doi.org
September 28, 2025 at 4:35 PM
New paper: 🌇 Combining column and in-situ observations helps reduce uncertainties in urban CH₄ emissions and better capture trends. Thanks Jun and all coauthors for the great teamwork!
doi.org/10.1029/2025...
doi.org/10.1029/2025...
Our Institute of Environmental Phyiscs hosted the ITMS (Integrated Greenhouse Gas Monitoring System) General Assembly 2025. Day 1 was a great start! Inspiring keynotes and new insights into modelling results. Huge thanks to all presenters & attendees for good discussions! @uniheidelberg.bsky.social
September 23, 2025 at 8:06 PM
Our Institute of Environmental Phyiscs hosted the ITMS (Integrated Greenhouse Gas Monitoring System) General Assembly 2025. Day 1 was a great start! Inspiring keynotes and new insights into modelling results. Huge thanks to all presenters & attendees for good discussions! @uniheidelberg.bsky.social
✨ New paper! ✨
We ran WRF at 1 km over an urban area to test how physics schemes shape performance
🏙️ Urban & PBL schemes matter most
🌁 Station characteristics often dominate metrics
Why it matters: Better models = better GHG monitoring
doi.org/10.1016/j.at...
👏 Kudos to Lukas Pilz
We ran WRF at 1 km over an urban area to test how physics schemes shape performance
🏙️ Urban & PBL schemes matter most
🌁 Station characteristics often dominate metrics
Why it matters: Better models = better GHG monitoring
doi.org/10.1016/j.at...
👏 Kudos to Lukas Pilz
September 2, 2025 at 4:14 PM
✨ New paper! ✨
We ran WRF at 1 km over an urban area to test how physics schemes shape performance
🏙️ Urban & PBL schemes matter most
🌁 Station characteristics often dominate metrics
Why it matters: Better models = better GHG monitoring
doi.org/10.1016/j.at...
👏 Kudos to Lukas Pilz
We ran WRF at 1 km over an urban area to test how physics schemes shape performance
🏙️ Urban & PBL schemes matter most
🌁 Station characteristics often dominate metrics
Why it matters: Better models = better GHG monitoring
doi.org/10.1016/j.at...
👏 Kudos to Lukas Pilz
🙌🏻 New paper in Earth System Dynamics showing how social norms & group structures shape (un)sustainable futures. 🤝
Congrats to Max Bechthold on his first first-author pub + for leading a great interdisciplinary collaboration.
👉Paper: doi.org/10.5194/esd-...
Congrats to Max Bechthold on his first first-author pub + for leading a great interdisciplinary collaboration.
👉Paper: doi.org/10.5194/esd-...
doi.org
August 30, 2025 at 8:23 PM
🙌🏻 New paper in Earth System Dynamics showing how social norms & group structures shape (un)sustainable futures. 🤝
Congrats to Max Bechthold on his first first-author pub + for leading a great interdisciplinary collaboration.
👉Paper: doi.org/10.5194/esd-...
Congrats to Max Bechthold on his first first-author pub + for leading a great interdisciplinary collaboration.
👉Paper: doi.org/10.5194/esd-...
Reposted by Sanam Vardag
50 Jahre Umweltphysik an der Universität Heidelberg – Wegweisende Forschung zum Fluss von Energie und Materie in der Umwelt
www.uni-heidelberg.de/de/newsroom/...
#universität #heidelberg #uniheidelberg #umweltphysik #klima #erde #forschung #jubiläum
www.uni-heidelberg.de/de/newsroom/...
#universität #heidelberg #uniheidelberg #umweltphysik #klima #erde #forschung #jubiläum
August 5, 2025 at 12:31 PM
50 Jahre Umweltphysik an der Universität Heidelberg – Wegweisende Forschung zum Fluss von Energie und Materie in der Umwelt
www.uni-heidelberg.de/de/newsroom/...
#universität #heidelberg #uniheidelberg #umweltphysik #klima #erde #forschung #jubiläum
www.uni-heidelberg.de/de/newsroom/...
#universität #heidelberg #uniheidelberg #umweltphysik #klima #erde #forschung #jubiläum
Exciting news: Our pyVPRM paper led by @theogl.bsky.social has been published in GMD. The flexible further development of VPRM works with Sentinel‑2, MODIS & VIIRS and delivers high‑resolution and improved carbon flux estimates. Read it: doi.org/10.5194/gmd-18-4713-2025
pyVPRM: a next-generation vegetation photosynthesis and respiration model for the post-MODIS era
Abstract. The Vegetation Photosynthesis and Respiration Model (VPRM) is a well-established tool for estimating carbon exchange fluxes between the atmosphere and the biosphere. The gross primary produc...
doi.org
July 31, 2025 at 1:02 PM
Exciting news: Our pyVPRM paper led by @theogl.bsky.social has been published in GMD. The flexible further development of VPRM works with Sentinel‑2, MODIS & VIIRS and delivers high‑resolution and improved carbon flux estimates. Read it: doi.org/10.5194/gmd-18-4713-2025
Reposted by Sanam Vardag
🦄 The UNICORN CO₂ network is growing! 🚨
Red dots = installed sensors
Blue dots = confirmed locations coming soon 🌍
We’re building an urban network in Heidelberg and Mannheim of atmospheric CO₂ - one node at a time.
Stay tuned… the first data is coming in soon! 📊✨
Red dots = installed sensors
Blue dots = confirmed locations coming soon 🌍
We’re building an urban network in Heidelberg and Mannheim of atmospheric CO₂ - one node at a time.
Stay tuned… the first data is coming in soon! 📊✨
July 26, 2025 at 6:22 AM
🦄 The UNICORN CO₂ network is growing! 🚨
Red dots = installed sensors
Blue dots = confirmed locations coming soon 🌍
We’re building an urban network in Heidelberg and Mannheim of atmospheric CO₂ - one node at a time.
Stay tuned… the first data is coming in soon! 📊✨
Red dots = installed sensors
Blue dots = confirmed locations coming soon 🌍
We’re building an urban network in Heidelberg and Mannheim of atmospheric CO₂ - one node at a time.
Stay tuned… the first data is coming in soon! 📊✨
🌍 Excited to share an important piece of work led by Jeongmin Yun on African carbon dynamics.
🛰️ Using multiple satellite data products (including OCO-2), we explore what drives interannual variability across Africa’s diverse ecosystems. 🌿
Check it out here: doi.org/10.1029/2025...
🛰️ Using multiple satellite data products (including OCO-2), we explore what drives interannual variability across Africa’s diverse ecosystems. 🌿
Check it out here: doi.org/10.1029/2025...
doi.org
July 19, 2025 at 11:42 AM
🌍 Excited to share an important piece of work led by Jeongmin Yun on African carbon dynamics.
🛰️ Using multiple satellite data products (including OCO-2), we explore what drives interannual variability across Africa’s diverse ecosystems. 🌿
Check it out here: doi.org/10.1029/2025...
🛰️ Using multiple satellite data products (including OCO-2), we explore what drives interannual variability across Africa’s diverse ecosystems. 🌿
Check it out here: doi.org/10.1029/2025...
Reposted by Sanam Vardag
🦄 Meet the UNICORN Team: Prof. Dr. André Butz
@abutz.bsky.social leads UNICORN with a focus on spectroscopic
techniques and novel instruments.
André fosters collaborative research across disciplines.
🌐 www.iup.uni-
heidelberg.de/en/research/atmosphere/atmosphere-and-remote-sensing-butz-group
techniques and novel instruments.
André fosters collaborative research across disciplines.
🌐 www.iup.uni-
heidelberg.de/en/research/atmosphere/atmosphere-and-remote-sensing-butz-group
July 11, 2025 at 5:31 AM
🦄 Meet the UNICORN Team: Prof. Dr. André Butz
@abutz.bsky.social leads UNICORN with a focus on spectroscopic
techniques and novel instruments.
André fosters collaborative research across disciplines.
🌐 www.iup.uni-
heidelberg.de/en/research/atmosphere/atmosphere-and-remote-sensing-butz-group
techniques and novel instruments.
André fosters collaborative research across disciplines.
🌐 www.iup.uni-
heidelberg.de/en/research/atmosphere/atmosphere-and-remote-sensing-butz-group
Visited Wageningen University for Kims PhD defense. The campus was beautiful, the discussions with bright students were inspiring, and Kim gave a fantastic defense of an impressive thesis. Thanks so much for the invitation and warm welcome! 😊
July 8, 2025 at 9:35 PM
Visited Wageningen University for Kims PhD defense. The campus was beautiful, the discussions with bright students were inspiring, and Kim gave a fantastic defense of an impressive thesis. Thanks so much for the invitation and warm welcome! 😊
Reposted by Sanam Vardag
🦄 Meet the UNICORN Team: Dr. Sanam Vardag
@sanamnv.bsky.social leads the UNICORN team with expertise in greenhouse gas simulations and urban emission quantification. She is driven by a commitment to interdisciplinary collaboration for climate solutions.
🌐 www.iup.uni-heidelberg.de/en/research/...
@sanamnv.bsky.social leads the UNICORN team with expertise in greenhouse gas simulations and urban emission quantification. She is driven by a commitment to interdisciplinary collaboration for climate solutions.
🌐 www.iup.uni-heidelberg.de/en/research/...
July 4, 2025 at 10:50 AM
🦄 Meet the UNICORN Team: Dr. Sanam Vardag
@sanamnv.bsky.social leads the UNICORN team with expertise in greenhouse gas simulations and urban emission quantification. She is driven by a commitment to interdisciplinary collaboration for climate solutions.
🌐 www.iup.uni-heidelberg.de/en/research/...
@sanamnv.bsky.social leads the UNICORN team with expertise in greenhouse gas simulations and urban emission quantification. She is driven by a commitment to interdisciplinary collaboration for climate solutions.
🌐 www.iup.uni-heidelberg.de/en/research/...
Reposted by Sanam Vardag
We’ve launched UNICORN – the University Network for CO₂ in the Rhine-Neckar Metropolitan Area 🌍🌆
UNICORN establishes a dense, urban CO₂ monitoring network to support science-based climate policy at the city scale.
🔗 Website: www.iup.uni-heidelberg.de/en/research/...
@uniheidelberg.bsky.social
UNICORN establishes a dense, urban CO₂ monitoring network to support science-based climate policy at the city scale.
🔗 Website: www.iup.uni-heidelberg.de/en/research/...
@uniheidelberg.bsky.social
UNICORN - Institute of Environmental Physics
www.iup.uni-heidelberg.de
June 23, 2025 at 12:28 PM
We’ve launched UNICORN – the University Network for CO₂ in the Rhine-Neckar Metropolitan Area 🌍🌆
UNICORN establishes a dense, urban CO₂ monitoring network to support science-based climate policy at the city scale.
🔗 Website: www.iup.uni-heidelberg.de/en/research/...
@uniheidelberg.bsky.social
UNICORN establishes a dense, urban CO₂ monitoring network to support science-based climate policy at the city scale.
🔗 Website: www.iup.uni-heidelberg.de/en/research/...
@uniheidelberg.bsky.social
Today I gave a remote talk at IWGGMS-21 on studying semi-arid regions with GOSAT 🌍 Really enjoyed many great talks—though couldn’t catch them all due to the time shift. Grateful to be part of this community! #IWGGMS #GOSAT #RemoteSensing #NIES
June 11, 2025 at 6:24 PM
Today I gave a remote talk at IWGGMS-21 on studying semi-arid regions with GOSAT 🌍 Really enjoyed many great talks—though couldn’t catch them all due to the time shift. Grateful to be part of this community! #IWGGMS #GOSAT #RemoteSensing #NIES
🌍 Excited for our group's work at #EGU25! From GHG sensing to AI-driven emission estimates & climate feedbacks. 🚀 Full list of contributions here: www.linkedin.com/posts/dr-san... #ClimateScience #GHG #RemoteSensing
#egu25 #climatescience #ghg #remotesensing #urbanmonitoring #itms… | Dr. Sanam Vardag
🌍 Excited to highlight our group's contributions to EGU General Assembly 2025!
From GHG measurements and AI to ecosystem respiration and urban CO₂ networks — proud of the team’s broad reach! 🌟
🎤 T...
www.linkedin.com
April 28, 2025 at 7:55 AM
🌍 Excited for our group's work at #EGU25! From GHG sensing to AI-driven emission estimates & climate feedbacks. 🚀 Full list of contributions here: www.linkedin.com/posts/dr-san... #ClimateScience #GHG #RemoteSensing
New study uses satellite CO₂ data to reveal what drives seasonal carbon fluxes in South American temperate ecosystems. Turns out, rewetting dry soils spikes respiration before plants start photosynthesizing. A key process global models are missing. #CarbonCycle #RemoteSensing
doi.org/10.1029/2024...
doi.org/10.1029/2024...
CO2 Release During Soil Rewetting Shapes the Seasonal Carbon Dynamics in South American Temperate Region
Combining ecosystem models with satellite-based top-down fluxes enhances our understanding of carbon dynamics in remote regions
In the South American Temperate (SAT) region, an early increase in ...
doi.org
April 23, 2025 at 9:22 PM
New study uses satellite CO₂ data to reveal what drives seasonal carbon fluxes in South American temperate ecosystems. Turns out, rewetting dry soils spikes respiration before plants start photosynthesizing. A key process global models are missing. #CarbonCycle #RemoteSensing
doi.org/10.1029/2024...
doi.org/10.1029/2024...
The institute of environmental physics participated at the Girls Day 2025 to show girls how cool environmental physics can be and to motivate this career path www.iup.uni-heidelberg.de/en/node/552 #girlsday #empowerment #girlspower @uniheidelberg.bsky.social
Girls' Day am Institut für Umweltphysik: Forschen, Staunen, Mitmachen! - Institute of Environmental Physics
www.iup.uni-heidelberg.de
April 14, 2025 at 6:03 PM
The institute of environmental physics participated at the Girls Day 2025 to show girls how cool environmental physics can be and to motivate this career path www.iup.uni-heidelberg.de/en/node/552 #girlsday #empowerment #girlspower @uniheidelberg.bsky.social
Reposted by Sanam Vardag
Quantifying urban emissions is difficult due to high heterogeny of anthropogenic and biogenic emissions in cities. @sanamnv.bsky.social presents experimental urban network designs and emission quantification for enhanced emission verification.
#UrbanGHGSummit
#ICOSCities
#UrbanGHGSummit
#ICOSCities
April 8, 2025 at 7:57 AM
Quantifying urban emissions is difficult due to high heterogeny of anthropogenic and biogenic emissions in cities. @sanamnv.bsky.social presents experimental urban network designs and emission quantification for enhanced emission verification.
#UrbanGHGSummit
#ICOSCities
#UrbanGHGSummit
#ICOSCities
It was a pleasure to host a workshop on atmospheric modelling within the ITMS project (“Integrated Greenhouse gas monitoring system for Germany”) project. I enjoyed fruitful discussions on how to best track Germany's greenhouse gas emissions.
#ITMS #Heidelberg @uniheidelberg.bsky.social
#ITMS #Heidelberg @uniheidelberg.bsky.social
April 1, 2025 at 6:50 PM
It was a pleasure to host a workshop on atmospheric modelling within the ITMS project (“Integrated Greenhouse gas monitoring system for Germany”) project. I enjoyed fruitful discussions on how to best track Germany's greenhouse gas emissions.
#ITMS #Heidelberg @uniheidelberg.bsky.social
#ITMS #Heidelberg @uniheidelberg.bsky.social
🌍 New research on the southern African carbon cycle! 🛰️
We used satellite CO₂ data (2009–2018) to refine CO₂ flux estimates, revealing that photosynthesis drives interannual variability, while soil respiration after rewetting shapes the seasonal cycle.
📄 Read more: doi.org/10.5194/bg-2...
We used satellite CO₂ data (2009–2018) to refine CO₂ flux estimates, revealing that photosynthesis drives interannual variability, while soil respiration after rewetting shapes the seasonal cycle.
📄 Read more: doi.org/10.5194/bg-2...
Seasonal and interannual variability in CO2 fluxes in southern Africa seen by GOSAT
Abstract. The interannual variability in the global carbon sink is heavily influenced by semiarid regions. Southern hemispheric Africa has large semiarid and arid regions. However, there is only a spa...
doi.org
March 22, 2025 at 4:50 PM
🌍 New research on the southern African carbon cycle! 🛰️
We used satellite CO₂ data (2009–2018) to refine CO₂ flux estimates, revealing that photosynthesis drives interannual variability, while soil respiration after rewetting shapes the seasonal cycle.
📄 Read more: doi.org/10.5194/bg-2...
We used satellite CO₂ data (2009–2018) to refine CO₂ flux estimates, revealing that photosynthesis drives interannual variability, while soil respiration after rewetting shapes the seasonal cycle.
📄 Read more: doi.org/10.5194/bg-2...
I am excited to share that I have been appointed by the Federal Minister for Digital and Transport Affairs, Dr. Volker Wissing, as a member of the scientific advisory board of the German meteorological service (DWD).
www.iup.uni-heidelberg.de/en/about-us/...
@uniheidelberg.bsky.social
www.iup.uni-heidelberg.de/en/about-us/...
@uniheidelberg.bsky.social
Dr. Sanam Vardag appointed as a member of the Scientific Advisory Board of the German Metservice - Institute of Environmental Physics
www.iup.uni-heidelberg.de
March 11, 2025 at 8:33 PM
I am excited to share that I have been appointed by the Federal Minister for Digital and Transport Affairs, Dr. Volker Wissing, as a member of the scientific advisory board of the German meteorological service (DWD).
www.iup.uni-heidelberg.de/en/about-us/...
@uniheidelberg.bsky.social
www.iup.uni-heidelberg.de/en/about-us/...
@uniheidelberg.bsky.social
Hello Bluesky-World! I just deleted my X account and I am ready to start a network on Bluesky.
March 11, 2025 at 8:27 PM
Hello Bluesky-World! I just deleted my X account and I am ready to start a network on Bluesky.