Earth's Albedo-Flip greenhouse amplification

[aerohead]

I watched a rebroadcast of this 2020 production Wednesday morning. I hadn't seen it.
Briefly,
They showed the paleoclimate profile over the last four ice -ages, interglacials, interstadials.
The 'warm' 'HOT-HOUSE' Earth episodes were much longer then the short, 'cooler' ' SNOWBALL ' Earth episodes, as we're presently living within.
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What stuck out from the program was that, you can't have sea ice without first having land ice ( this was new to me ).
Antarctica was easy: snow accumulated, compressed to firn ice, then ice, on the 'continent', then spread into the oceans surrounding it as ice-shelves, cut off from warm water by the Drake Passage and Antarctic Circumpolar Current.'
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In the Arctic, Ice only began on Greenland, Ellesmere Island etc., and from 'land' was finally able to take hold over the Arctic Ocean.
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As the land-based glaciers disappear, leaving exposed rock and soil, it appears that Earth will lose it's only mechanism for the creation of sea ice, Earth's enormous solar reflectors.

[RustyLugNut]

Why don't we start here? It's much more effective than trying to kill off our Western Economies while the Chinese and Indians bring us to 600 ppm CO2, no matter what we do here in the West.

https://e360.yale.edu/features/urban...warming-cities

https://agupubs.onlinelibrary.wiley....y%200.3%C2%B0C.

But of course, there are downsides to everything.

https://www.insidescience.org/news/w...educe-rainfall

Personally, I'm building a Hobbit Hole as my next house.

[redpoint5]

Let's start by engineering a better roofing solution than stupid asphalt shingle roofs.

I did go with a dark color when I had new shingles put on my house, because it's the best looking when paired with a variety of exterior colors.

[RustyLugNut]

Originally Posted by redpoint5

Let's start by engineering a better roofing solution than stupid asphalt shingle roofs.

I did go with a dark color when I had new shingles put on my house, because it's the best looking when paired with a variety of exterior colors.

When it came time to re-roof our home, white shingles were off the table via a city ordnance. White was considered to be "Cheap looking", thus was not allowed. We have no Home Owners Association in our area but the City acts as one. In vacationing in Bermuda a few years ago, pretty much all the local roofs were white as that was the style. Just make white fashionable.

[freebeard]

Let's start by engineering a better roofing solution than stupid asphalt shingle roofs.

How about Tesla non-solar tiles? IIRC they cost between asphalt and metal and have a 25 year warranty.


greenridgesolar.com/2021/01/tesla-solar-roof-tiles-worth-it/

If it were a corrugated metal roof, I'd want Copper enamel with a blue-green wash for patina.

[ME_Andy]

I'm on board with white roofing.

Texas is getting hotter and more miserable. 98 degrees-plus for the past 20 days, as far as I remember. We are moving to a new plot of land and planting shade trees will be the first thing I do.

[Piotrsko]

GAF is making solar panel roof tiles. Makes the whole roof a solar panel and uses replaceable panels. Doesn't mqke the house less hot, but does power the A/C nicely.

Trees take at least 10 years to provide proper shade even for ailanthus, empress,or Siberian elm

[freebeard]

All that weight requires structure. And moss grows on it.

en.wikipedia.org/wiki/ETFE

ETFE film is self-cleaning (due to its nonstick surface) and recyclable. It is prone to punctures by sharp edges and therefore mostly used for roofs.[2] As a film for roofing it can be stretched and still be taut if some variation in size, such as that caused by thermal expansion, were to occur. Employing heat welding, tears can be repaired with a patch or multiple sheets assembled into larger panels.

ETFE has an approximate tensile strength of 42 MPa (6100 psi), with a working temperature range of 89 K to 423 K (−185 °C to +150 °C or −300 °F to +300 °F).[3]

ETFE resins are resistant to ultraviolet light. An artificial weathering test (comparable to 30 years’ exposure) produced almost no signs of film deterioration.[4]

ETFE systems can control light transmission through the use of frit patterns printed on the foil. Thermal and acoustic insulation can be incorporated into an ETFE structure via the use of multi-layer systems which use low-pressure air pumps to create ETFE "cushions".[5]

365tickets.co.uk/eden-project/eden-project-2-for-1-offer

[aerohead]

Originally Posted by redpoint5

Let's start by engineering a better roofing solution than stupid asphalt shingle roofs.

I did go with a dark color when I had new shingles put on my house, because it's the best looking when paired with a variety of exterior colors.

Unless your AC unit and ductwork are in the attic, as long as you're properly insulated, and have proper attic ventilation, it doesn't matter what color the shingles are.
The infrared you feel 'standing', isn't experienced by the insulation at your feet. Only the delta-dry bulb air temperature, ten-inches above the top of the insulation.

[redpoint5]

I've found few attics that are properly ventilated. I don't think the majority of roof builders understand what proper ventilation is.

That said, this thread is with regard to reflecting some energy back to space.