Mastodawn

Fractal Kitty Jul 28, 2025

I have a new post on To Ground:

https://toground.link/ephemeral-lenticular-being/

#bearblog #indieweb #blogging #nature #photography #lenticular #standingwaves

ephemeral lenticular being

Look at you; a scarf of silken cloud draping over the earthly being that nurtures you into existence. You form from beautiful circumstance. The wind that sta...

to ground

💧🌏 Greg Cocks May 29, 2025

Inferring River Discharge From Google Earth Images - Critical Flow Theory Can Predict River Discharge Based On The Spacing Of Standing Waves Captured By Google Earth Images
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https://eos.org/editor-highlights/inferring-river-discharge-from-google-earth-images <-- shared technical article
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https://doi.org/10.1029/2025GL114851 <-- shared paper
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“… KEY POINTS:
• Standing waves in rivers indicate unique hydraulic conditions that allow depth and velocity to be inferred from the spacing of the waves
• Critical flow theory can be used to calculate discharge based on measurements of wavelength and width made using readily available images
• Discharges estimated via the critical flow approach for 82 images agreed closely with discharges recorded at gaging stations (R² = 0.98)…”
#GIS #spatial #mapping #spatialanalysis #remotesensing #GoogleEarth #CriticalFlowTheory #riverdischarge #standingwaves #gages #gauges #earthobservation #flow #volume #hydraulicjumps #velocity #depth #water #hydrography #hydrology #wavelength #channelwidth #discharge #estimation

Nicole Sharp Oct 23, 2024

Mountain ridgelines push oncoming winds up and over their peaks, creating the conditions for some spectacular condensation. If the displaced air is moist enough, it cools and condenses into a cloud that appears to hover over the peak. In reality, winds are constantly moving up and over the mountain, condensing into visible cloud where the temperature is cool enough and then morphing back to water vapor once temperatures increase. This process can create stacked lenticular clouds like those seen here. This spot in New Zealand sees lenticular clouds so often that the formation has its own name: Taieri Pet! (Image credit: satellite image – L. Dauphin, b/w – National Library; via NASA Earth Observatory)

Black-and-white photo of an instance of the Taieri Pet lenticular cloud structure.

https://fyfluiddynamics.com/2024/10/lenticular-landscape/

#atmosphericScience #cloudFormation #condensation #fluidDynamics #lenticularClouds #mountains #physics #science #standingWaves