@benmooreau @drunard @Veritatem2021 @Willard1951 @Michael_D_Crow @ScienceBlog3 @BenKoby1911 @S_Metzeler @Anvndarnamn5 @Devonian1342 @SpiruSensei @Zane1968 @Hji45519156 @AndreGrossza @Data79504085 @ammocrypta @Climatehope2 @AristotleMrs @DenisDaly @InspirallPE @ChrisBBacon3 @C_R_O_M________ @priscian @3GHtweets @PvtMcAuslan @EdwardRiffle @AuroriaEn @JusticeTrudeau @Mark_A_Lunn @judgementalbe1 @Coleski14 @wallytoms0 @LesserMegadeath @WernerReinhard5 @S_D_Mannix @JimBlack48 @Jaisans @CarrudoDon @LiveLifeBK24 @TheDisproof @Joeyd87745119 @waxliberty @SuperFoxyLoxy @JaapTitulaer @wjack76995 @Rocky35418823 @NobaconEgbert @balls95652097 @NASA 1/9. Ben wrote, "it only takes a small change in Nature to make a great impact⦠The difference between today and the last Ice Age was only a < 2% change in temperature."
(I assume that by "ice age" you mean glaciation.)
You swapped cause and effect. (It's a common mistake.)
(I assume that by "ice age" you mean glaciation.)
You swapped cause and effect. (It's a common mistake.)
@benmooreau @drunard @Veritatem2021 @Willard1951 @Michael_D_Crow @ScienceBlog3 @BenKoby1911 @S_Metzeler @Anvndarnamn5 @Devonian1342 @SpiruSensei @Zane1968 @Hji45519156 @AndreGrossza @Data79504085 @ammocrypta @Climatehope2 @AristotleMrs @DenisDaly @InspirallPE @ChrisBBacon3 @C_R_O_M________ @priscian @3GHtweets @PvtMcAuslan @EdwardRiffle @AuroriaEn @JusticeTrudeau @Mark_A_Lunn @judgementalbe1 @Coleski14 @wallytoms0 @LesserMegadeath @WernerReinhard5 @S_D_Mannix @JimBlack48 @Jaisans @CarrudoDon @LiveLifeBK24 @TheDisproof @Joeyd87745119 @waxliberty @SuperFoxyLoxy @JaapTitulaer @wjack76995 @Rocky35418823 @NobaconEgbert @balls95652097 @NASA 2/9. Ice sheets cause lower average temperatures, not vice-versa.
At LGM it's believed temperatures in the tropics were hardly different from now. But much of North America & Eurasia were ice-covered, so THOSE places were very cold. That reduced "global"β²π΄πͺπ€β³ average temp.
At LGM it's believed temperatures in the tropics were hardly different from now. But much of North America & Eurasia were ice-covered, so THOSE places were very cold. That reduced "global"β²π΄πͺπ€β³ average temp.
@benmooreau @drunard @Veritatem2021 @Willard1951 @Michael_D_Crow @ScienceBlog3 @BenKoby1911 @S_Metzeler @Anvndarnamn5 @Devonian1342 @SpiruSensei @Zane1968 @Hji45519156 @AndreGrossza @Data79504085 @ammocrypta @Climatehope2 @AristotleMrs @DenisDaly @InspirallPE @ChrisBBacon3 @C_R_O_M________ @priscian @3GHtweets @PvtMcAuslan @EdwardRiffle @AuroriaEn @JusticeTrudeau @Mark_A_Lunn @judgementalbe1 @Coleski14 @wallytoms0 @LesserMegadeath @WernerReinhard5 @S_D_Mannix @JimBlack48 @Jaisans @CarrudoDon @LiveLifeBK24 @TheDisproof @Joeyd87745119 @waxliberty @SuperFoxyLoxy @JaapTitulaer @wjack76995 @Rocky35418823 @NobaconEgbert @balls95652097 @NASA 3/9. Advance & retreat of ice sheets drive glaciation/deglaciation cycles, not global average temperatures.
A 1Β°C temperature change shifts isotherms only β60 miles. But the Laurentide advanced & retreated β2000 miles! Obviously 5-10Β°C global temperature change didn't do that.
A 1Β°C temperature change shifts isotherms only β60 miles. But the Laurentide advanced & retreated β2000 miles! Obviously 5-10Β°C global temperature change didn't do that.
@benmooreau @drunard @Veritatem2021 @Willard1951 @Michael_D_Crow @ScienceBlog3 @BenKoby1911 @S_Metzeler @Anvndarnamn5 @Devonian1342 @SpiruSensei @Zane1968 @Hji45519156 @AndreGrossza @Data79504085 @ammocrypta @Climatehope2 @AristotleMrs @DenisDaly @InspirallPE @ChrisBBacon3 @C_R_O_M________ @priscian @3GHtweets @PvtMcAuslan @EdwardRiffle @AuroriaEn @JusticeTrudeau @Mark_A_Lunn @judgementalbe1 @Coleski14 @wallytoms0 @LesserMegadeath @WernerReinhard5 @S_D_Mannix @JimBlack48 @Jaisans @CarrudoDon @LiveLifeBK24 @TheDisproof @Joeyd87745119 @waxliberty @SuperFoxyLoxy @JaapTitulaer @wjack76995 @Rocky35418823 @NobaconEgbert @balls95652097 @NASA 4/9. Ice sheets grow with winter snow accumulation, and shrink with summer melting:
If winter snow accumulation > summer ice loss the ice sheet advances.
If summer ice loss > winter snow accumulation the ice sheet retreats.
Q: So what controls which of the two is larger?
If winter snow accumulation > summer ice loss the ice sheet advances.
If summer ice loss > winter snow accumulation the ice sheet retreats.
Q: So what controls which of the two is larger?
@benmooreau @drunard @Veritatem2021 @Willard1951 @Michael_D_Crow @ScienceBlog3 @BenKoby1911 @S_Metzeler @Anvndarnamn5 @Devonian1342 @SpiruSensei @Zane1968 @Hji45519156 @AndreGrossza @Data79504085 @ammocrypta @Climatehope2 @AristotleMrs @DenisDaly @InspirallPE @ChrisBBacon3 @C_R_O_M________ @priscian @3GHtweets @PvtMcAuslan @EdwardRiffle @AuroriaEn @JusticeTrudeau @Mark_A_Lunn @judgementalbe1 @Coleski14 @wallytoms0 @LesserMegadeath @WernerReinhard5 @S_D_Mannix @JimBlack48 @Jaisans @CarrudoDon @LiveLifeBK24 @TheDisproof @Joeyd87745119 @waxliberty @SuperFoxyLoxy @JaapTitulaer @wjack76995 @Rocky35418823 @NobaconEgbert @balls95652097 @NASA 5/9. A: seasonality:
Large seasonal changes cause ice sheet retreat.
Small seasonal changes cause ice sheet advance.
Large seasonality means hotter summers and colder winters. Hotter summers melt more ice. Colder winters have less snowfall. So ice sheets shrink.
Large seasonal changes cause ice sheet retreat.
Small seasonal changes cause ice sheet advance.
Large seasonality means hotter summers and colder winters. Hotter summers melt more ice. Colder winters have less snowfall. So ice sheets shrink.
@benmooreau @drunard @Veritatem2021 @Willard1951 @Michael_D_Crow @ScienceBlog3 @BenKoby1911 @S_Metzeler @Anvndarnamn5 @Devonian1342 @SpiruSensei @Zane1968 @Hji45519156 @AndreGrossza @Data79504085 @ammocrypta @Climatehope2 @AristotleMrs @DenisDaly @InspirallPE @ChrisBBacon3 @C_R_O_M________ @priscian @3GHtweets @PvtMcAuslan @EdwardRiffle @AuroriaEn @JusticeTrudeau @Mark_A_Lunn @judgementalbe1 @Coleski14 @wallytoms0 @LesserMegadeath @WernerReinhard5 @S_D_Mannix @JimBlack48 @Jaisans @CarrudoDon @LiveLifeBK24 @TheDisproof @Joeyd87745119 @waxliberty @SuperFoxyLoxy @JaapTitulaer @wjack76995 @Rocky35418823 @NobaconEgbert @balls95652097 @NASA 6/9. Conversely, reduced seasonality means cooler summers and milder winters. Cooler summers melt less ice. Milder winters deposit more snowfall. So ice sheets grow.
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@benmooreau @drunard @Veritatem2021 @Willard1951 @Michael_D_Crow @ScienceBlog3 @BenKoby1911 @S_Metzeler @Anvndarnamn5 @Devonian1342 @SpiruSensei @Zane1968 @Hji45519156 @AndreGrossza @Data79504085 @ammocrypta @Climatehope2 @AristotleMrs @DenisDaly @InspirallPE @ChrisBBacon3 @C_R_O_M________ @priscian @3GHtweets @PvtMcAuslan @EdwardRiffle @AuroriaEn @JusticeTrudeau @Mark_A_Lunn @judgementalbe1 @Coleski14 @wallytoms0 @LesserMegadeath @WernerReinhard5 @S_D_Mannix @JimBlack48 @Jaisans @CarrudoDon @LiveLifeBK24 @TheDisproof @Joeyd87745119 @waxliberty @SuperFoxyLoxy @JaapTitulaer @wjack76995 @Rocky35418823 @NobaconEgbert @balls95652097 @NASA 7/9. That's how Milankovitch cycles drive glaciations: When Earth's seasonal swings are reduced to the point that the great northern ice sheets grow a little bit each year, by adding more snow in winters than they lose in summers, after thousands of years all of Canada is buried.
@benmooreau @drunard @Veritatem2021 @Willard1951 @Michael_D_Crow @ScienceBlog3 @BenKoby1911 @S_Metzeler @Anvndarnamn5 @Devonian1342 @SpiruSensei @Zane1968 @Hji45519156 @AndreGrossza @Data79504085 @ammocrypta @Climatehope2 @AristotleMrs @DenisDaly @InspirallPE @ChrisBBacon3 @C_R_O_M________ @priscian @3GHtweets @PvtMcAuslan @EdwardRiffle @AuroriaEn @JusticeTrudeau @Mark_A_Lunn @judgementalbe1 @Coleski14 @wallytoms0 @LesserMegadeath @WernerReinhard5 @S_D_Mannix @JimBlack48 @Jaisans @CarrudoDon @LiveLifeBK24 @TheDisproof @Joeyd87745119 @waxliberty @SuperFoxyLoxy @JaapTitulaer @wjack76995 @Rocky35418823 @NobaconEgbert @balls95652097 @NASA 8/9. Of course, the great Laurentide, Fennoscandian & Cordilleran ice sheets are gone, now, so they can't retreat any farther. (The only significant remnant is Greenland, and major ice sheet retreat there is not in prospect.)
@benmooreau @drunard @Veritatem2021 @Willard1951 @Michael_D_Crow @ScienceBlog3 @BenKoby1911 @S_Metzeler @Anvndarnamn5 @Devonian1342 @SpiruSensei @Zane1968 @Hji45519156 @AndreGrossza @Data79504085 @ammocrypta @Climatehope2 @AristotleMrs @DenisDaly @InspirallPE @ChrisBBacon3 @C_R_O_M________ @priscian @3GHtweets @PvtMcAuslan @EdwardRiffle @AuroriaEn @JusticeTrudeau @Mark_A_Lunn @judgementalbe1 @Coleski14 @wallytoms0 @LesserMegadeath @WernerReinhard5 @S_D_Mannix @JimBlack48 @Jaisans @CarrudoDon @LiveLifeBK24 @TheDisproof @Joeyd87745119 @waxliberty @SuperFoxyLoxy @JaapTitulaer @wjack76995 @Rocky35418823 @NobaconEgbert @balls95652097 @NASA 9/9. So Milankovitch cycle-driven glaciation cycles are evidence of very large natural long-period climate variability, but they are not evidence of high climate sensitivity to anthropogenic GHG forcings.
@benmooreau @drunard @Veritatem2021 @Willard1951 @Michael_D_Crow @ScienceBlog3 @BenKoby1911 @S_Metzeler @Anvndarnamn5 @Devonian1342 @SpiruSensei @Zane1968 @Hji45519156 @AndreGrossza @Data79504085 @ammocrypta @Climatehope2 @AristotleMrs @DenisDaly @InspirallPE @ChrisBBacon3 @C_R_O_M________ @priscian @3GHtweets @PvtMcAuslan @EdwardRiffle @AuroriaEn @JusticeTrudeau @Mark_A_Lunn @judgementalbe1 @Coleski14 @wallytoms0 @LesserMegadeath @WernerReinhard5 @S_D_Mannix @JimBlack48 @Jaisans @CarrudoDon @LiveLifeBK24 @TheDisproof @Joeyd87745119 @waxliberty @SuperFoxyLoxy @JaapTitulaer @wjack76995 @Rocky35418823 @NobaconEgbert ThreadDotBlue compilation:
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