Weiwei Zhan
@weiweizhan.bsky.social
PhD student @Columbia | visiting student @CarnegieEcology | vegetation-climate interactions 🌎| photosynthesis 🌱| machine learning
Reposted by Weiwei Zhan
Just published this new paper, with a bunch of fantastic colleagues, with many suggestions for "Improving the representation of plant water stress and water use in Earth System Models." Access is free online. We have some great figures, thanks to Victor Leshyk. 🧪🌐🌳🌎
November 5, 2025 at 5:51 PM
Just published this new paper, with a bunch of fantastic colleagues, with many suggestions for "Improving the representation of plant water stress and water use in Earth System Models." Access is free online. We have some great figures, thanks to Victor Leshyk. 🧪🌐🌳🌎
Reposted by Weiwei Zhan
New PhD position in Plant Ecophysiology🌳 Study how atmospheric & soil drought shape tree carbon & water relations at the VPDrought experiment in Switzerland. Start Jan 2026. Apply here: m.refline.ch/273855/1759/... @wslresearch.bsky.social
August 20, 2025 at 12:38 PM
New PhD position in Plant Ecophysiology🌳 Study how atmospheric & soil drought shape tree carbon & water relations at the VPDrought experiment in Switzerland. Start Jan 2026. Apply here: m.refline.ch/273855/1759/... @wslresearch.bsky.social
Reposted by Weiwei Zhan
📢Just out! A new paper by the team in @pnas.org : Observed declines in leaf nitrogen explained by photosynthetic acclimation to CO2!
www.pnas.org/doi/10.1073/...
Maoya Bassiouni, @nickgregsmith.bsky.social @trevorkeenan.bsky.social et al.
www.pnas.org/doi/10.1073/...
Maoya Bassiouni, @nickgregsmith.bsky.social @trevorkeenan.bsky.social et al.
Observed declines in leaf nitrogen explained by photosynthetic acclimation to CO2 | PNAS
Widespread evidence of decreasing leaf nutrients has raised concerns about ecosystem
productivity under global change. Interpreting trends in leaf ...
www.pnas.org
August 15, 2025 at 11:21 AM
📢Just out! A new paper by the team in @pnas.org : Observed declines in leaf nitrogen explained by photosynthetic acclimation to CO2!
www.pnas.org/doi/10.1073/...
Maoya Bassiouni, @nickgregsmith.bsky.social @trevorkeenan.bsky.social et al.
www.pnas.org/doi/10.1073/...
Maoya Bassiouni, @nickgregsmith.bsky.social @trevorkeenan.bsky.social et al.
What a wonderful surprise to see our work reflected in a commentary that so clearly "gets it". Thank you so much @juergenknauer.bsky.social !
Read the accompanying News & Views commentary from Jürgen Knauer 👇 www.nature.com/articles/s41...
July 16, 2025 at 5:44 PM
What a wonderful surprise to see our work reflected in a commentary that so clearly "gets it". Thank you so much @juergenknauer.bsky.social !
Reposted by Weiwei Zhan
A machine learning approach using long-term observations of eddy covariance finds that the increase in plant intrinsic water-use efficiency under higher CO2 is driven primarily by reduction in canopy conductance, rather than stimulation of gross primary productivity
www.nature.com/articles/s41... 🧪
www.nature.com/articles/s41... 🧪
Reduced water loss rather than increased photosynthesis controls CO2-enhanced water-use efficiency - Nature Ecology & Evolution
A machine learning approach using long-term observations of eddy covariance finds that the increase in plant intrinsic water-use efficiency under higher CO2 levels, across diverse ecosystems, is drive...
www.nature.com
July 15, 2025 at 2:30 PM
A machine learning approach using long-term observations of eddy covariance finds that the increase in plant intrinsic water-use efficiency under higher CO2 is driven primarily by reduction in canopy conductance, rather than stimulation of gross primary productivity
www.nature.com/articles/s41... 🧪
www.nature.com/articles/s41... 🧪
Reposted by Weiwei Zhan
What a pleasure to write a News & Views piece on this intriguing article that found surprising insights into WUE trends --> www.nature.com/articles/s41...
July 14, 2025 at 12:40 AM
What a pleasure to write a News & Views piece on this intriguing article that found surprising insights into WUE trends --> www.nature.com/articles/s41...
Reposted by Weiwei Zhan
For a recent review see www.nature.com/articles/s43...
"Both short-duration and long-duration (>1 day) rainfall extremes are intensifying with warming at a rate consistent with the increase in atmospheric moisture" (~7% per degree C), but some local convective rainfall events increase even more. 5/5
"Both short-duration and long-duration (>1 day) rainfall extremes are intensifying with warming at a rate consistent with the increase in atmospheric moisture" (~7% per degree C), but some local convective rainfall events increase even more. 5/5
Anthropogenic intensification of short-duration rainfall extremes - Nature Reviews Earth & Environment
Short-duration rainfall extremes are determined by complex processes that are affected by the warming climate. This Review assesses the evidence for the intensification of short-duration rainfall extr...
www.nature.com
July 12, 2025 at 2:59 PM
For a recent review see www.nature.com/articles/s43...
"Both short-duration and long-duration (>1 day) rainfall extremes are intensifying with warming at a rate consistent with the increase in atmospheric moisture" (~7% per degree C), but some local convective rainfall events increase even more. 5/5
"Both short-duration and long-duration (>1 day) rainfall extremes are intensifying with warming at a rate consistent with the increase in atmospheric moisture" (~7% per degree C), but some local convective rainfall events increase even more. 5/5
Reposted by Weiwei Zhan
New Article: "When and where soil dryness matters to ecosystem photosynthesis" rdcu.be/evfGV
A causality-guided explainable AI framework shows soil moisture dominates vapour pressure deficit in shaping global photosynthesis during water-limited conditions.
A causality-guided explainable AI framework shows soil moisture dominates vapour pressure deficit in shaping global photosynthesis during water-limited conditions.
July 8, 2025 at 3:34 AM
New Article: "When and where soil dryness matters to ecosystem photosynthesis" rdcu.be/evfGV
A causality-guided explainable AI framework shows soil moisture dominates vapour pressure deficit in shaping global photosynthesis during water-limited conditions.
A causality-guided explainable AI framework shows soil moisture dominates vapour pressure deficit in shaping global photosynthesis during water-limited conditions.
Reposted by Weiwei Zhan
Delighted to share our new paper "Reduced water loss rather than increased photosynthesis controls CO2-enhanced water-use efficiency:
www.nature.com/articles/s41... , which demonstrates the strongly detectable impact of CO2 fertilization on canopy and stomata conductance,
www.nature.com/articles/s41... , which demonstrates the strongly detectable impact of CO2 fertilization on canopy and stomata conductance,
LinkedIn
This link will take you to a page that’s not on LinkedIn
lnkd.in
July 12, 2025 at 9:07 AM
Delighted to share our new paper "Reduced water loss rather than increased photosynthesis controls CO2-enhanced water-use efficiency:
www.nature.com/articles/s41... , which demonstrates the strongly detectable impact of CO2 fertilization on canopy and stomata conductance,
www.nature.com/articles/s41... , which demonstrates the strongly detectable impact of CO2 fertilization on canopy and stomata conductance,
Interested in how plant intrinsic water-use efficiency (iWUE) responds to rising CO2? Our new paper shows that CO2-enhanced iWUE is mainly driven by reduced canopy conductance, while stimulation of ecosystem photosynthesis is less detectable given current data length. www.nature.com/articles/s41...
Reduced water loss rather than increased photosynthesis controls CO2-enhanced water-use efficiency - Nature Ecology & Evolution
A machine learning approach using long-term observations of eddy covariance finds that the increase in plant intrinsic water-use efficiency under higher CO2 levels, across diverse ecosystems, is drive...
www.nature.com
July 11, 2025 at 5:40 PM
Interested in how plant intrinsic water-use efficiency (iWUE) responds to rising CO2? Our new paper shows that CO2-enhanced iWUE is mainly driven by reduced canopy conductance, while stimulation of ecosystem photosynthesis is less detectable given current data length. www.nature.com/articles/s41...
Reposted by Weiwei Zhan
This species-specific study and another latest out global analyses www.nature.com/articles/s41... converge to the same conclusion: enhanced tree/forest growth by the global warming cannot offset the negative impacts causes by disturbances, such as droughts.
July 8, 2025 at 8:18 PM
This species-specific study and another latest out global analyses www.nature.com/articles/s41... converge to the same conclusion: enhanced tree/forest growth by the global warming cannot offset the negative impacts causes by disturbances, such as droughts.
Reposted by Weiwei Zhan
This was the first chapter of my PhD but we spent a long long time on reviewing and revising (which indeed greatly improved the quality). This is where we need nice supervisors and coauthors who keep encouraging me regardless of peer criticism and rejection! Also C.Bio. has very good author service!
Testing ecophysiological theory using tree traits along a vapour pressure deficit (VPD) gradient shows, as predicted, that photosynthetic capacity is higher at higher VPD sites. Contrary to the predictions, potential water conductivity tends to increase with higher VPD. doi.org/10.1038/s420...
July 10, 2025 at 8:54 PM
This was the first chapter of my PhD but we spent a long long time on reviewing and revising (which indeed greatly improved the quality). This is where we need nice supervisors and coauthors who keep encouraging me regardless of peer criticism and rejection! Also C.Bio. has very good author service!
Reposted by Weiwei Zhan
Our new paper is out on Nature Plants! We found that soil moisture contributes more to ecosystem photosynthesis than VPD for the water-limited periods and water-limited locations, using causality-guided explainable AI. www.nature.com/articles/s41...
When and where soil dryness matters to ecosystem photosynthesis - Nature Plants
Using a causality-guided explainable AI framework, Liu et al. show soil moisture dominates vapour pressure deficit in shaping global photosynthesis during water-limited conditions.
www.nature.com
July 9, 2025 at 3:43 AM
Our new paper is out on Nature Plants! We found that soil moisture contributes more to ecosystem photosynthesis than VPD for the water-limited periods and water-limited locations, using causality-guided explainable AI. www.nature.com/articles/s41...
Reposted by Weiwei Zhan
Excited to share our new paper "When and where soil dryness matters to ecosystem photosynthesis" www.nature.com/articles/s41..., which resolves a long-standing debate as to whether soil moisture or atmospheric dryness dominates water stress response.
When and where soil dryness matters to ecosystem photosynthesis - Nature Plants
Using a causality-guided explainable AI framework, Liu et al. show soil moisture dominates vapour pressure deficit in shaping global photosynthesis during water-limited conditions.
www.nature.com
July 8, 2025 at 11:46 AM
Excited to share our new paper "When and where soil dryness matters to ecosystem photosynthesis" www.nature.com/articles/s41..., which resolves a long-standing debate as to whether soil moisture or atmospheric dryness dominates water stress response.
Reposted by Weiwei Zhan
Traditionally ESMs didn't actively model human decision-making, but just published today: "E3SM-GCAM: A Synchronously Coupled Human Component in the E3SM Earth System Model Enables Novel Human-Earth Feedback Research" by Alan Di Vittorio et al.! agupubs.onlinelibrary.wiley.com/doi/10.1029/...
E3SM‐GCAM: A Synchronously Coupled Human Component in the E3SM Earth System Model Enables Novel Human‐Earth Feedback Research
We have incorporated a novel, advanceable human component in an Earth system model to simulate human-Earth feedbacks Including terrestrial productivity feedbacks from the Earth to the human syste...
agupubs.onlinelibrary.wiley.com
June 20, 2025 at 3:37 PM
Traditionally ESMs didn't actively model human decision-making, but just published today: "E3SM-GCAM: A Synchronously Coupled Human Component in the E3SM Earth System Model Enables Novel Human-Earth Feedback Research" by Alan Di Vittorio et al.! agupubs.onlinelibrary.wiley.com/doi/10.1029/...
Reposted by Weiwei Zhan
🌍New paper out today!!! Global variation in vegetation carbon use efficiency inferred from eddy covariance observations @xiangzluo.bsky.social @natureportfolio.nature.com 🔗👇
www.nature.com/articles/s41...
www.nature.com/articles/s41...
Global variation in vegetation carbon use efficiency inferred from eddy covariance observations - Nature Ecology & Evolution
The efficiency with which plants use carbon assimilated through photosynthesis has a key role in determining natureʼs capacity to offset carbon dioxide emissions. This study leverages global eddy cova...
www.nature.com
June 19, 2025 at 1:10 PM
🌍New paper out today!!! Global variation in vegetation carbon use efficiency inferred from eddy covariance observations @xiangzluo.bsky.social @natureportfolio.nature.com 🔗👇
www.nature.com/articles/s41...
www.nature.com/articles/s41...
Reposted by Weiwei Zhan
Excited to share our new Nature Geoscience paper on how persistent Rossby waves patterns are triggering simultaneous hot-dry extremes across western Europe, Asia, and the U.S., severely reducing vegetation productivity and carbon uptake.
www.nature.com/articles/s41...
www.nature.com/articles/s41...
Northern ecosystem productivity reduced by Rossby-wave-driven hot–dry conditions - Nature Geoscience
Satellite observations suggest that prolonged hot–dry conditions induced by Rossby waves in the jet stream reduce ecosystem productivity, providing insights into the potential impacts of a future warm...
www.nature.com
June 17, 2025 at 9:46 AM
Excited to share our new Nature Geoscience paper on how persistent Rossby waves patterns are triggering simultaneous hot-dry extremes across western Europe, Asia, and the U.S., severely reducing vegetation productivity and carbon uptake.
www.nature.com/articles/s41...
www.nature.com/articles/s41...
Reposted by Weiwei Zhan
How do dominant plants' functional traits affect biomass responses to global change? New paper by Mingyan Hu et al uses the large Manipulation Experiments Synthesis Initiative (MESI) database to find out.
besjournals.onlinelibrary.wiley.com/doi/epdf/10....
besjournals.onlinelibrary.wiley.com/doi/epdf/10....
Plant functional traits affect biomass responses to global change: A meta‐analysis
The positive effects of elevated nutrient on belowground biomass were more pronounced for communities dominated by “fast” species. In communities dominated by arbuscular mycorrhizal fungi-associated ...
besjournals.onlinelibrary.wiley.com
June 6, 2025 at 9:53 PM
How do dominant plants' functional traits affect biomass responses to global change? New paper by Mingyan Hu et al uses the large Manipulation Experiments Synthesis Initiative (MESI) database to find out.
besjournals.onlinelibrary.wiley.com/doi/epdf/10....
besjournals.onlinelibrary.wiley.com/doi/epdf/10....
Reposted by Weiwei Zhan
Now online: "Permafrost, Peatland, and Cropland Regions Are Key to Reconciling North American Carbon Sink Estimates" by Kelsey Foster et al., including @avnimalh0tra.bsky.social w/ Stanford, PNNL, NAU, and NRC colleagues agupubs.onlinelibrary.wiley.com/doi/10.1029/...
Permafrost, Peatland, and Cropland Regions Are Key to Reconciling North American Carbon Sink Estimates
Additional sink inferred by inversions in just 16% of North America accounts for the discrepancy between top-down and bottom-up estimates Statistically significant differences between top-down an...
agupubs.onlinelibrary.wiley.com
June 11, 2025 at 1:44 PM
Now online: "Permafrost, Peatland, and Cropland Regions Are Key to Reconciling North American Carbon Sink Estimates" by Kelsey Foster et al., including @avnimalh0tra.bsky.social w/ Stanford, PNNL, NAU, and NRC colleagues agupubs.onlinelibrary.wiley.com/doi/10.1029/...
Wanna learn how to partition CO2 fluxes using ML and SIF? 🌱🤖 Come join me on April 8 - it's a talk ➕ a hands-on coding session!
Don't miss this exciting Workshop to learn on Partitioning CO2 Fluxes
Our invited speaker is Weiwei Zhan from Columbia University. The workshop focuses on sciencedirect.com/science/arti...?
Date: Tuesday, April 8, 2025
Time: 1 PM EST
Register for this webinar: lbnl.zoom.us/meeting/regi...
Our invited speaker is Weiwei Zhan from Columbia University. The workshop focuses on sciencedirect.com/science/arti...?
Date: Tuesday, April 8, 2025
Time: 1 PM EST
Register for this webinar: lbnl.zoom.us/meeting/regi...
April 5, 2025 at 3:57 PM
Wanna learn how to partition CO2 fluxes using ML and SIF? 🌱🤖 Come join me on April 8 - it's a talk ➕ a hands-on coding session!
Reposted by Weiwei Zhan
New pub out in @annbot.bsky.social led by Astrid Ode titled "Temporal constraints on leaf-level trait plasticity for next-generation land surface models"
We critically examine timescales of trait-environment responses
Have a look!
@lemontree-uofr.bsky.social
academic.oup.com/aob/advance-...
We critically examine timescales of trait-environment responses
Have a look!
@lemontree-uofr.bsky.social
academic.oup.com/aob/advance-...
Temporal constraints on leaf-level trait plasticity for next-generation land surface models
AbstractBackground and aims. Dynamic global vegetation models (DGVMs) are essential for quantifying the role of terrestrial ecosystems in the Earth’s clima
academic.oup.com
March 28, 2025 at 2:59 PM
New pub out in @annbot.bsky.social led by Astrid Ode titled "Temporal constraints on leaf-level trait plasticity for next-generation land surface models"
We critically examine timescales of trait-environment responses
Have a look!
@lemontree-uofr.bsky.social
academic.oup.com/aob/advance-...
We critically examine timescales of trait-environment responses
Have a look!
@lemontree-uofr.bsky.social
academic.oup.com/aob/advance-...
Reposted by Weiwei Zhan
The FLUXNET Early Career Network (FLUXNET-ECN) is excited to announce “Bridging the Gap: Flux Data Meets Land Surface Models”, a three-day in-person workshop August 6-8th, 2025 focused on integrating flux data for validating and parameterizing land surface models.
March 27, 2025 at 12:35 AM
The FLUXNET Early Career Network (FLUXNET-ECN) is excited to announce “Bridging the Gap: Flux Data Meets Land Surface Models”, a three-day in-person workshop August 6-8th, 2025 focused on integrating flux data for validating and parameterizing land surface models.
Reposted by Weiwei Zhan
eartharxiv.org/repository/v...
Can we develop a global #deeplearning #model for daily Soil CO2 efflux?
Results show
- #LSTM models can use existing data to generate synthetic data for temperate mesic regions
- challenges of transferring relationships learned from data-rich to data-poor sites
Can we develop a global #deeplearning #model for daily Soil CO2 efflux?
Results show
- #LSTM models can use existing data to generate synthetic data for temperate mesic regions
- challenges of transferring relationships learned from data-rich to data-poor sites
March 31, 2025 at 2:16 AM
eartharxiv.org/repository/v...
Can we develop a global #deeplearning #model for daily Soil CO2 efflux?
Results show
- #LSTM models can use existing data to generate synthetic data for temperate mesic regions
- challenges of transferring relationships learned from data-rich to data-poor sites
Can we develop a global #deeplearning #model for daily Soil CO2 efflux?
Results show
- #LSTM models can use existing data to generate synthetic data for temperate mesic regions
- challenges of transferring relationships learned from data-rich to data-poor sites
Reposted by Weiwei Zhan
🌲🌳🌐 New study reminds us that forests act globally as a #carbon sink
Between 2001 and 2023, the world's #forests have absorbed 5.5 gigatonnes more #CO2 than they have emitted on average each year.
👉 Gibbs et al. dx.doi.org/10.5194/essd... 🧪
Between 2001 and 2023, the world's #forests have absorbed 5.5 gigatonnes more #CO2 than they have emitted on average each year.
👉 Gibbs et al. dx.doi.org/10.5194/essd... 🧪
March 28, 2025 at 5:54 PM
🌲🌳🌐 New study reminds us that forests act globally as a #carbon sink
Between 2001 and 2023, the world's #forests have absorbed 5.5 gigatonnes more #CO2 than they have emitted on average each year.
👉 Gibbs et al. dx.doi.org/10.5194/essd... 🧪
Between 2001 and 2023, the world's #forests have absorbed 5.5 gigatonnes more #CO2 than they have emitted on average each year.
👉 Gibbs et al. dx.doi.org/10.5194/essd... 🧪
Reposted by Weiwei Zhan
A global meta-analysis of soil respiration in response to elevated CO2 www.sciencedirect.com/science/arti...
A global meta-analysis of soil respiration in response to elevated CO2
Soil respiration (Rs) is a crucial component of the terrestrial ecosystem carbon (C) cycle, which significantly regulates atmospheric CO2 concentratio…
www.sciencedirect.com
March 27, 2025 at 6:13 PM
A global meta-analysis of soil respiration in response to elevated CO2 www.sciencedirect.com/science/arti...