Thread by @ncdave4life

@fischerfischy @NolanCarlton2 @Data79504085 @JusticeTrudeau @Willard1951 @BenKoby1911 @RushhourP @ChrisBBacon3 @Climatehope2 @Huroner2 @Devonian1342 @Mark_A_Lunn @AristotleMrs @Michael_D_Crow @balls95652097 @Anvndarnamn5 @sandcastle1975 @Jaisans @Hji45519156 @S_D_Mannix @JimBlack48 @glinch72 @DenisDaly @stitchnstab @CarrudoDon @Veritatem2021 @LiveLifeBK24 @TheDisproof @priscian @Ceist8 @Joeyd87745119 @waxliberty @SuperFoxyLoxy @JaapTitulaer @wjack76995 @Rocky35418823 @NobaconEgbert @JustThi30117912 @SniemN @BointonGiles @ammocrypta @SeekerTheGreat1 @ubique60 @CDMarshall7 @EthonRaptor @RMcgillss @paligap17 @MaggieL @Willy1000 1/6》 Radiation from both Sun and the atmosphere (mostly GHGs & clouds) is absorbed by the surface of the Earth, warming it. It's measurable, and indisputable.

At noon, with the Sun directly overhead, most of the radiation absorbed at the surface of the Earth is from the Sun.

@fischerfischy @NolanCarlton2 @Data79504085 @JusticeTrudeau @Willard1951 @BenKoby1911 @RushhourP @ChrisBBacon3 @Climatehope2 @Huroner2 @Devonian1342 @Mark_A_Lunn @AristotleMrs @Michael_D_Crow @balls95652097 @Anvndarnamn5 @sandcastle1975 @Jaisans @Hji45519156 @S_D_Mannix @JimBlack48 @glinch72 @DenisDaly @stitchnstab @CarrudoDon @Veritatem2021 @LiveLifeBK24 @TheDisproof @priscian @Ceist8 @Joeyd87745119 @waxliberty @SuperFoxyLoxy @JaapTitulaer @wjack76995 @Rocky35418823 @NobaconEgbert @JustThi30117912 @SniemN @BointonGiles @ammocrypta @SeekerTheGreat1 @ubique60 @CDMarshall7 @EthonRaptor @RMcgillss @paligap17 @MaggieL @Willy1000 2/6》 But at night nearly all of the radiation absorbed at the surface is radiation which was emitted from the atmosphere, almost none is from the Sun.

Overall (average, night & day), about 2/3 of the radiation absorbed at the surface is LW IR emitted from within the atmosphere

@fischerfischy @NolanCarlton2 @Data79504085 @JusticeTrudeau @Willard1951 @BenKoby1911 @RushhourP @ChrisBBacon3 @Climatehope2 @Huroner2 @Devonian1342 @Mark_A_Lunn @AristotleMrs @Michael_D_Crow @balls95652097 @Anvndarnamn5 @sandcastle1975 @Jaisans @Hji45519156 @S_D_Mannix @JimBlack48 @glinch72 @DenisDaly @stitchnstab @CarrudoDon @Veritatem2021 @LiveLifeBK24 @TheDisproof @priscian @Ceist8 @Joeyd87745119 @waxliberty @SuperFoxyLoxy @JaapTitulaer @wjack76995 @Rocky35418823 @NobaconEgbert @JustThi30117912 @SniemN @BointonGiles @ammocrypta @SeekerTheGreat1 @ubique60 @CDMarshall7 @EthonRaptor @RMcgillss @paligap17 @MaggieL @Willy1000 3/6》 Some of the LW IR emitted within the atmosphere is "downwelling" IR absorbed by the surface, warming it (and some escapes to space).

Likewise, some of the LW IR from the surface of the Earth is absorbed within the atmosphere, warming it (and some escapes to space).

@fischerfischy @NolanCarlton2 @Data79504085 @JusticeTrudeau @Willard1951 @BenKoby1911 @RushhourP @ChrisBBacon3 @Climatehope2 @Huroner2 @Devonian1342 @Mark_A_Lunn @AristotleMrs @Michael_D_Crow @balls95652097 @Anvndarnamn5 @sandcastle1975 @Jaisans @Hji45519156 @S_D_Mannix @JimBlack48 @glinch72 @DenisDaly @stitchnstab @CarrudoDon @Veritatem2021 @LiveLifeBK24 @TheDisproof @priscian @Ceist8 @Joeyd87745119 @waxliberty @SuperFoxyLoxy @JaapTitulaer @wjack76995 @Rocky35418823 @NobaconEgbert @JustThi30117912 @SniemN @BointonGiles @ammocrypta @SeekerTheGreat1 @ubique60 @CDMarshall7 @EthonRaptor @RMcgillss @paligap17 @MaggieL @Willy1000 4/6》 Some naive students hear that LW IR from the atmosphere warms the surface, and that LW IR from the surface warms the atmosphere, and they wonder, "then why doesn't everything just get hotter & hotter, until it all burns up?"

@fischerfischy @NolanCarlton2 @Data79504085 @JusticeTrudeau @Willard1951 @BenKoby1911 @RushhourP @ChrisBBacon3 @Climatehope2 @Huroner2 @Devonian1342 @Mark_A_Lunn @AristotleMrs @Michael_D_Crow @balls95652097 @Anvndarnamn5 @sandcastle1975 @Jaisans @Hji45519156 @S_D_Mannix @JimBlack48 @glinch72 @DenisDaly @stitchnstab @CarrudoDon @Veritatem2021 @LiveLifeBK24 @TheDisproof @priscian @Ceist8 @Joeyd87745119 @waxliberty @SuperFoxyLoxy @JaapTitulaer @wjack76995 @Rocky35418823 @NobaconEgbert @JustThi30117912 @SniemN @BointonGiles @ammocrypta @SeekerTheGreat1 @ubique60 @CDMarshall7 @EthonRaptor @RMcgillss @paligap17 @MaggieL @Willy1000 5/6》 The answer to that question is that when radiation is emitted by one thing (e.g., the surface of the Earth) and absorbed by another (e.g., GHGs in the air), there's no net energy gain, because the emitter of the radiation is cooled as much as the absorber is warmed.