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#modeling

1 post1 participant0 posts today
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MPI für Meteorologie

🚨 📢 #Job alert! 💼
Are you interested in #oceanography with a background in #physics, #mathematics,& data #visualization? 🌊 📊 We're opening a 3-year position for a doctoral #PhD candidate to work on the #ocean component of our #ICON #climate model. You'll be working w/ our "Complex #Modeling & Extreme #Computing" group under supervision of Nils Brüggemann & be a member of our #IMPRS doctoral program. 🎓 Check out the full ad & apply until April 20: jobs.mpimet.mpg.de/jobposting/
#hiring #sciencejobs

jobs.mpimet.mpg.dePhD | Doctoral Candidate (W-0037)
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RashaKamel

"Climate change is causing the world's glaciers to disappear at an alarming rate. Scientists have been studying and modeling this process for years, but until now, no research group has specifically examined how glacier melt will affect glacier-fed streams and their ecosystems".

#glaciers #ecosystems #modeling #climatechange
phys.org/news/2025-03-glacier-

Phys.org · Glacier melt puts unique microbial ecosystems under threatBy Ecole Polytechnique Federale de Lausanne
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💧🌏 Greg Cocks

Evaluating Drought Risk Of The Red River Of The North Basin Using Historical And Stochastic Streamflow Upstream From Emerson, Manitoba
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pubs.usgs.gov/publication/sir2 <-- shared link to USGS publication
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waterdata.usgs.gov/nwis <-- USGS National Water Information System (NWIS) database - USGS water open data for the Nation
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#GIS #spatial #mapping #deterministic #waterbalance #stochasticweather #model #modeling #RedRiver #USA #Canada #spatialanalysis #spatiotemporal #waterresources #streamgage #NorthDakota #Manitoba #streamflow #flood #flooding #watersupply #agriculture #farming #ecology #drought #extremeweather #meteorology #basin #subbasin #risk #hazard #gauge #flow
@USGS

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Anthony
Today I heard an anecdote about the Monty Hall problem. Apparently Monty Hall himself was once asked his thoughts about the formal version of the problem, and his response was that it was in no way faithful to the game show problem from which it takes its name.

Where does the formal version fall short? Monty himself actively tried to mislead the contestant. He knew them, and tried to persuade them. This was a key part of the game. He said the formal model kills all the suspense. It'd be too boring to watch.

In other words, Monty Hall operated in a large world and it's in that context the Monty Hall problem is interesting, whereas the formal "Monty Hall problem" chops it down to a small world that is not faithful to the real world version of the problem, and on top of it all is boring.

#EcologicalRationality #LargeWorlds #SmallWorlds #modeling #DecisionTheory #ChoiceTheory #RationalChoiceTheory #MontyHallProblem
en.wikipedia.orgMonty Hall problem - Wikipedia
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💧🌏 Greg Cocks

Glacial Lake Mapping Using Remote Sensing Geo-Foundation Model
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doi.org/10.1016/j.jag.2025.104 <-- shared paper
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HIGHLIGHTS:
• Proposed U-ViT model based on Prithvi GFM for multi-sensor glacial lake mapping.
• Achieved an F1 score of 0.894 on Sentinel-1&2, surpassing CNNs scoring below 0.8.
• Maintains strong performance with 50% less training data, proving efficiency.
• Excels in detecting small lakes (<0.01km²) and handling clouds and complex terrains..."
#GIS #spatial #mapping #glaciallake #GeospatialFoundationModel #satellite #Sentinel #GaoFen #remotesensing #earthobservation #model #modeling #climatechange #glacial #glacier #melt #melting #UViT #deepleanring #AI #framework #performance #metrics #opensource

phot - glacier with glacial lake, Karakoram mountain range
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💧🌏 Greg Cocks

A Methodology For The Multitemporal Analysis Of Land Cover Changes And Urban Expansion Using Synthetic Aperture Radar (SAR) Imagery - A Case Study Of The Aburrá Valley In Colombia
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doi.org/10.3390/rs17030554 <-- shared paper
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#GIS #spatial #mapping #SyntheticApertureRadar #SAR #remotesensing #multitemporalanalysis #landcover #landcoverchange #clustering #kurtosis #fuzzylogic #kernelbasedmethod #machinelearning #spatialanalysis #spatiotemporal #geostatistics #model #modeling #AburráValley #Columbia #urban #urbanexpansion #population #growth #topography #monitoring #satellite #sentinel #valley #landuse #distribution #infrastructure #building #roads #naturalresources #environmental #conservation #monitoring #multitemporal

photo - looking down into Medellin, Aburrá Valley, Columbia from a surrounding high ground
annotated maps with imagery - Areas of analysis of the results by the SMA1 methodological route and kurtosis. (A). Central Park in Bello (B). Parques del Río Medellín (C). Arkadia Shopping center; (D). Peldar Plant (E). La García water supply reservoir (F). Conasfaltos dam (G). La Ayurá stream basin in Envigado (H). Central Park in Bello (I). Avenida Regional Norte (J). Vía Distribuidora Sur.
schematic / work flow - proposed methodology for analysis of zonal land cover changes
annonated maps - The Aburrá Valley (white line) between the valleys of the Magdalena and Cauca rivers. Data were acquired from ALOS PALSAR Terrain Corrected and data from IGAC.
Continued thread
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Giuseppe Bilotta

Why does this all matter for #lava flow #modeling? Because most probably lava is non-Newtonian. This means that in our wish to determine how its viscosity depends on the chemical and physical properties of the melt, we're not looking for ONE functional relationship (the viscosity coefficient), but multiple ones: for example, assuming a Herschel–Bulkley model we'd need to find THREE such functional relationship: one for the yield strength, one for the exponent, and one for the coefficient. All of these measured on the actual lava flows across different volcanoes at different times and in completely uncontrolled conditions.

As you can see, not exactly the simplest of tasks.

And of course, if we don't have these functional relationship we can't actually model lava flows.

Or can we?

8/

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💧🌏 Greg Cocks

Grfin Tools—User Guide And Methods For Modeling Landslide Runout And Debris-Flow Growth And Inundation
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pubs.usgs.gov/publication/tm14 <-- shared USGS publication
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code.usgs.gov/grfintools/grfin <-- shared USGS software release
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H/T Jonathan Perkins USGS
[ another open source resource for everyone from the USGS ~smile~ ]
#GIS #spatial #mapping #opensource #openlibrary #Grfin #software #package #regional #debrisflow #engineeringgeology #geology #inundation #spatialanalysis #spatiotemporal #geophysics #geophysical #massmovement #landslide #lahar #volcano #rock #avalanche #model #modeling #statistical #geostatistics #water #hydrology #downstream #elevation #remotesensing #DEM #flow #runout #risk #hazard #tools #slope #erosion #drainage #network #channel #channelisation #userguide
@USGS

screen shot - grfintools software repository home page (https://code.usgs.gov/grfintools/grfintools)
report figure 2 - Schematic flowchart illustrating common pathways for using Grfin Tools with examples identified in orange boxes
report figure 1 - Perspective view of topography illustrating the potential locations for three types of mass movements that can be derived from a Grfin Tools analysis.
USGS report cover page - Grfin Tools—User Guide And Methods For Modeling Landslide Runout And Debris-Flow Growth And Inundation
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