Georgia Papacharalampous
@georgiapapachar.bsky.social
430 followers
400 following
16 posts
I am an engineer, PhD, MSc working mainly on the intersection of geoscience and statistical modelling with a focus on machine learning algorithms, their combination with physics-based models and predictive uncertainty estimation.
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Hydrology Paper of the Day @georgiapapachar.bsky.social on estimating uncertainties associated with gridded precipitation data products derived from satellite remote sensing: non-linear ensemble learning and quantile loss functions; predictor variable reduction; stacking; and assessing performance.
Reposted by Georgia Papacharalampous
Reposted by Georgia Papacharalampous
A little bit delayed, but I hear it's picking up over here so sending this out into the world: our Lafayette team including Rachel Hurley (now grad student at WPI), Dave Brandes, and me put out this piece on flashiness across the Mid-Atlantic: onlinelibrary.wiley.com/doi/abs/10.1...
Drivers and Buffers of Stream Flashiness in the Mid‐Atlantic United States
In this study, we investigated flashiness across 195 Mid-Atlantic sites, each within one of seven different physiographic regions. Our findings identified several drivers and buffers of flashiness, e...
onlinelibrary.wiley.com
Reposted by Georgia Papacharalampous
Why has woody plant density been increasing in dryland ecosystems? In a new paper in @pnas.org we show that increasing tree density in pinyon-juniper woodlands could largely be a result of long-term population growth, rather than recent anthropogenic effects. www.pnas.org/doi/10.1073/...
PNAS
Proceedings of the National Academy of Sciences (PNAS), a peer reviewed journal of the National Academy of Sciences (NAS) - an authoritative source of high-impact, original research that broadly spans...
www.pnas.org
Reposted by Georgia Papacharalampous
@bjenquist.bsky.social - our latest #FunctionalTraits paper 🧮➕📏 #landscapeecology #macroecology
Barfknecht, Heikens, & Gibson. 2024.
Temporal changes in spatial scale and autocorrelation structure of forest openings based on taxonomic, phylogenetic, and functional turnover
doi.org/10.1016/j.ac...
Barfknecht, Heikens, & Gibson. 2024.
Temporal changes in spatial scale and autocorrelation structure of forest openings based on taxonomic, phylogenetic, and functional turnover
doi.org/10.1016/j.ac...
Redirecting
doi.org
Reposted by Georgia Papacharalampous
Thanks @applvegsci.bsky.social for the recognition of our paper. #Gibsonlab
@ecoevo.bsky.social et al.
The role of dominant prairie species ecotypes on plant diversity patterns of restored grasslands across a rainfall gradient in the US Great Plains
doi.org/10.1111/avsc...
@ecoevo.bsky.social et al.
The role of dominant prairie species ecotypes on plant diversity patterns of restored grasslands across a rainfall gradient in the US Great Plains
doi.org/10.1111/avsc...
Reposted by Georgia Papacharalampous
After 15 years of thinking and work, I'm very proud to share that I finally know how old Hells Canyon - the deepest fluvial gorge in North America is - ~2.1 Ma.
For more details see our recent article in @pnas.org
www.pnas.org/doi/abs/10.1...
For more details see our recent article in @pnas.org
www.pnas.org/doi/abs/10.1...
Cave records reveal recent origin of North America’s deepest canyon | PNAS
We explore how and when Hells Canyon, North America’s deepest river gorge (~2,400
m deep), formed, addressing these fundamental questions first pos...
www.pnas.org
Reposted by Georgia Papacharalampous
New article!! 🎉 "Pumped Storage Hydropower in the United States: Emerging Importance, Environmental and Social Impacts, and Critical Considerations" w/ @thienkim.bsky.social @bethaniturley.bsky.social #geosky #energysky #water #geography
wires.onlinelibrary.wiley.com/doi/10.1002/...
wires.onlinelibrary.wiley.com/doi/10.1002/...
Pumped Storage Hydropower in the United States: Emerging Importance, Environmental and Social Impacts, and Critical Considerations
Pumped storage hydropower development is rapidly resurging in the US, yet this energy storage technology has positive and negative impacts at different scales. Building projects that minimize trade-o....
wires.onlinelibrary.wiley.com
Reposted by Georgia Papacharalampous
Reposted by Georgia Papacharalampous
This new map provides a global view of the distribution of a multitude of aquatic ecosystems, including various wetlands. It's a pretty big step forward, and I look forward to seeing how it will be used e.g. to study wetland greenhouse gases.
essd.copernicus.org/articles/17/...
essd.copernicus.org/articles/17/...
Mapping the world's inland surface waters: an upgrade to the Global Lakes and Wetlands Database (GLWD v2)
Abstract. In recognition of the importance of inland waters, numerous datasets mapping their extents, types, or changes have been created using sources ranging from historical wetland maps to real-tim...
essd.copernicus.org
Reposted by Georgia Papacharalampous
My 2nd PhD chapter is out! Soil drying speeds encode the signature of evapotranspiration. Using SMAP data, we demonstrated that, introducing nonlinearity in a traditional soil model help capture aggressive vs conservative vegetation water consumption.
doi.org/10.1029/2024...
doi.org/10.1029/2024...
Reposted by Georgia Papacharalampous
If you’re interested in the history of how the first solar project approved by the Bureau of Land Management, and the California Energy Commission ended up not getting built, and how the largest solar project in the USA got built on farmland instead. This paper is for you. #EnergySky #GreenSky☀️🔌💡
New paper! Sunrise at the Salton Sea: environmental justice, land use change, and hydrosocial dynamics of solar energy transitions in the Imperial Valley, California. ☀️🔌💡 #solarpower #justtransition #energysky #greensky link.springer.com/article/10.1...
Reposted by Georgia Papacharalampous
Rising seas will cause coastal groundwater to rise in some areas - mobilizing soil contamination near old factories, dry cleaners and military bases.
The really fun part is that it can enter your house. 🧪
#hydrology
#climate
essopenarchive.org/users/929678...
The really fun part is that it can enter your house. 🧪
#hydrology
#climate
essopenarchive.org/users/929678...
The impact of sea-level and groundwater rise on indoor exposure to volatile organic compounds near contaminated sites in the San Francisco Bay Area
AUTHORSE. Lasky1, L. Davar2, L. L. Dillon3, G. Griggs2, J. A. Jacobs2, C. Pickett4, S. Sacoolas5, K.Befus6, C. Reid7, K. Hill11University of California, Berkeley, Department of Landscape Architecture ...
essopenarchive.org
Reposted by Georgia Papacharalampous
Plant-Waste Cellulose Nanocrystals Enhance Electrospun Membrane Properties and Support Electrochemical Inactivation of Bacteria during Filtration | ACS Sustainable Resource Management pubs.acs.org/doi/full/10....
Check out a new paper published by one of our faculty members!
Check out a new paper published by one of our faculty members!
Plant-Waste Cellulose Nanocrystals Enhance Electrospun Membrane Properties and Support Electrochemical Inactivation of Bacteria during Filtration
Plant-waste materials are emerging as a sustainable solution for producing high-value products with minimal environmental impact. In this work, a ball milling process was utilized to extract cellulose...
pubs.acs.org
Reposted by Georgia Papacharalampous
🚨New paper alert! We investigated the hydro-meteorological drivers of event runoff characteristics in three catchments with forest, grassland and agricultural land use, highlighting the differences in runoff generation mechanisms between land use types:
onlinelibrary.wiley.com/doi/10.1002/...
onlinelibrary.wiley.com/doi/10.1002/...
Hydro‐Meteorological Drivers of Event Runoff Characteristics Under Analogous Soil Moisture Patterns in Three Small‐Scale Headwater Catchments
Analogous soil moisture patterns and respective runoff patterns were identified by applying a novel time series-based pattern search. Wetness-derived variables were decisive for causing a similar run....
onlinelibrary.wiley.com
Reposted by Georgia Papacharalampous
🚨 New paper, led by Cristina Barber. We used high-resolution aerial imagery to study tree mortality in a tropical landscape. Large, isolated trees were most likely to die--alarming finding! @ecologicalsociety.bsky.social esajournals.onlinelibrary.wiley.com/doi/10.1002/...
Reposted by Georgia Papacharalampous
New paper alert in HESS with Erin Nicholls and @seankcarey.bsky.social ! We used generalized additive models to assess the drivers of seasonality in stream chemistry across ten permafrost catchments in the Yukon Territory! (1/n)
hess.copernicus.org/articles/29/...
hess.copernicus.org/articles/29/...
The role of catchment characteristics, discharge, and active- layer thaw in seasonal stream chemistry across 10 permafrost catchments
Abstract. High-latitude catchments are rapidly warming, leading to altered precipitation regimes, widespread permafrost degradation, and shifts in stream chemistry across major arctic rivers. In headw...
hess.copernicus.org
Reposted by Georgia Papacharalampous
Machine learning can help to understand the most important climate-impact drivers for crop yield loss. In this study, we unveil the potential of explainable machine learning to predict losses and understand their cause. nhess.copernicus.org/articles/25/...
A data-driven framework for assessing climatic impact drivers in the context of food security
Abstract. Understanding how physical climate-related hazards affect food production requires transforming climate data into relevant information for regional risk assessment. Data-driven methods can b...
nhess.copernicus.org
Reposted by Georgia Papacharalampous
This is a very nice new paper I was involved in. It is a very powerful new method for investigating the thermodynamic effects of climate change on rainfall extremes, with some quite sobering results showing very large increases in intensity.
🌧️🌍💧 Our new paper, led by Geert Lenderink, shows recent European extreme rainfall events have localised climate change responses beyond the expected Clausius-Clapeyron rate – potentially enhancing flash floods in a warmer climate.
Read it here: doi.org/10.1016/j.wa... @hayleyjfowler.bsky.social
Read it here: doi.org/10.1016/j.wa... @hayleyjfowler.bsky.social
Reposted by Georgia Papacharalampous
Our work on Great Zimbabwe used surface hydrology, ethnographic survey and geoarc to show that dhaka pits, previously interpreted as clay pits, were likely intended to collect and store water.
These smart local adaptations to water scarcity are so interesting
www.sciencedirect.com/science/arti...
These smart local adaptations to water scarcity are so interesting
www.sciencedirect.com/science/arti...
Reposted by Georgia Papacharalampous
One huge problem with the big focus on tree planting is that a forest is not just trees - its a community of interacting plants and animals
Most trees depend on animals to disperse their seeds, but seed dispersers are dying out everywhere
www.nature.com/articles/s44...
Most trees depend on animals to disperse their seeds, but seed dispersers are dying out everywhere
www.nature.com/articles/s44...
Drivers and impacts of global seed disperser decline - Nature Reviews Biodiversity
Many plants rely on animals to disperse their seeds, but some groups of these seed-dispersing animals are facing severe declines. This Review summarizes evidence of seed disperser declines and discuss...
www.nature.com
Reposted by Georgia Papacharalampous
Can AI weather models predict out-of-distribution gray swan extremes? We report @pnas.org that the answer is NO for global gray swans, YES for regional ones: AI models can't extrapolate from weaker events but can learn from similar events in other regions during training! doi.org/10.1073/pnas...
Can AI weather models predict out-of-distribution gray swan tropical cyclones? | PNAS
Predicting gray swan weather extremes, which are possible but so rare that they are
absent from the training dataset, is a major concern for AI wea...
doi.org
Reposted by Georgia Papacharalampous
Enjoyed working on this paper led by Love Kumar
NEW - Modeling Changes in Flow Dynamics From the Restoration of a Distributary Slough Along a Large Floodplain River, by Love Kumar, @rockyrivers.bsky.social and colleagues onlinelibrary.wiley.com/doi/full/10....
Reposted by Georgia Papacharalampous
🚨New paper🚨 shows a remarkably clean relationship between river width and stream order across the US
𝑇ℎ𝑒 𝑊𝑖𝑑𝑡ℎ𝑠 𝑜𝑓 𝑅𝑖𝑣𝑒𝑟𝑠 𝑎𝑛𝑑 𝑆𝑡𝑟𝑒𝑎𝑚𝑠 𝐴𝑐𝑟𝑜𝑠𝑠 𝑆𝑝𝑎𝑡𝑖𝑎𝑙 𝑆𝑐𝑎𝑙𝑒𝑠... 🔗 doi.org/10.1029/2025...
#hydrology #geomorphology #rivers #RemoteSensing
𝑇ℎ𝑒 𝑊𝑖𝑑𝑡ℎ𝑠 𝑜𝑓 𝑅𝑖𝑣𝑒𝑟𝑠 𝑎𝑛𝑑 𝑆𝑡𝑟𝑒𝑎𝑚𝑠 𝐴𝑐𝑟𝑜𝑠𝑠 𝑆𝑝𝑎𝑡𝑖𝑎𝑙 𝑆𝑐𝑎𝑙𝑒𝑠... 🔗 doi.org/10.1029/2025...
#hydrology #geomorphology #rivers #RemoteSensing
Reposted by Georgia Papacharalampous
