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#calculation

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ThePdog

Is there anyone who is actually competent in this Administration or are we stuck with a bunch of lackeys and yes men? (Purely rhetorical.)

I've used the BBC to avoid perceptions of domestic media bias. I have not worked through calculations personally, but there are many sources who are saying the same thing.

2/2

#TrumpTariffs #incompetence #ClownShow #calculation #lackeys

bbc.com/news/articles/c93gq72n

www.bbc.comHow were Donald Trump's tariffs calculated?Analysts have questioned claims that new tariffs are reciprocal and based on those charged against the US.
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@Brad_Rosenheim

Except ... when this claim (not about the satellites re-entering, just the amount of damage they cause to the atmosphere) started circulating some months back, I read an article (somewhere...) that analyzed the amount and type of matter it would distribute, and it pales in comparison to the amount the earth receives in "space dust" and micrometeroids every day.

Best figure I know of for the mass of "normal" space matter hitting our planet is 5,200 tonnes / year:
scientificamerican.com/article

The current Starlink satellites are "gen2 mini", and are 740 kg. So you would need to de-orbit more than 7,000 of them every year - not 4 per day - to even match the natural space dust falling on earth. Except it's even worse (for the argument) than that, because 740kg is their launch mass, including all their maneuvering fuel/gasses, which by definition are gone before the satellites are deorbited. I don't have an exact figure for how much mass the fuel accounts for, but it wouldn't surprise me if it was more than 25% of the mass of the spacecraft at launch.

The residue left in the atmosphere doesn't seem to be a very big deal.

#science #mass #satellite #deorbit #RunTheNumbers #calculation

edit: typo

Scientific American · Antarctic Study Shows How Much Space Dust Hits Earth Every YearBy Sarah Derouin
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💧🌏 Greg Cocks

Identification Of Geothermal Anomalies From Landsat Derived Land Surface Temperature, Mount Meager Volcanic Complex, British Columbia, Canada
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doi.org/10.1016/j.rse.2025.114 <-- shared paper
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“Highlights:
• A novel method for detecting geothermal components from solar energy dominated LST.
• Using LST time series to eliminate temporal variant solar energy input.
• Uncertainty in anomaly identification quantified by probability measure.
• Capable of revealing LST anomalies caused by geothermal, anthropogenic and surface processes..."
#GIS #spatial #mapping #britishcolumbia #BC #solar #geothermal #remotesensing #earthobservation #LST #spatialanalysis #spatiotemporal #naturalresources #volcanic #geology #geostatistics #landsurfacetemperature #satellite #geothermalheatflux #GHF #energybalance #calculation #model #MountMeager #Landsat #landsat8 #hotspring #landslide #massmovement #engineeringgeology #spring #seep #anthropogenic #HEP #hydropower #monitoring #risk #hazard

photo - sampling a fumerole, Job Glacier, Mount Meager, British Columbia, Canada
Inverted resistivity model from AMT data showing the subsurface rock resistivity structure in South Mount Meager (figure modified from Hormozzade Ghalati et al., 2022). a) resistivity slice at 500 m elevation (asl) showing two distinct high conductive anomalies and locations of the cross sections. Cross sections b) and c) in W-E direction, and d) and e) in N-S direction. Anomaly C1 is spatially in accordance with the occurrence of hot-warm spring swarms along the margin of the volcanic complex. Anomaly C2 appears in a circular shape, coincident spatially with the core area of the known deep geothermal prospect.
a) Map showing the location of Mount Meager Volcanic Complex (MMVC) and its relationship with the Garibaldi Volcanic Belt in western Canada (modified from Stewart, 2002). BR (Bridge River), CC (Mt. Cayley), EV (Elaho Valley), MG (Mt. Garibaldi), MC (Mountain Creek), WP (Watts Point). The red rectangular marks the study area. b, a Landsat-8 colour image (2017-07-18) showing details of the study area by a summer view of the MMVC with glacier (blue) at high altitude and vegetation cover (green) along the river valley. The red circle indicates locations of geothermal exploration wells, and orange polygons, the known hot springs.
Enlarged GHF anomaly maps and Google images explaining some of the possible anthropogenic and natural causes of high LST anomalies: a) GHF component of East Meager Anomaly; b) Google Earth image showing hydro-power station related facilities, and open quarries for local construction and road maintenance; c) GHF component of North Meager; d) Google Earth image showing a possible landslide site coincident with the anomalies.
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