#milankovitch — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #milankovitch, aggregated by home.social.
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The ~100,000-year cycles that pace #IceAge ❄️ transitions depend critically on #Mars 🔴. Earth's axial tilt also responds to Mars's gravitational influence.
Earth's #Milankovitch cycles* aren't just about Earth and the Sun. They're a product of our entire #planetary neighborhood https://www.sciencealert.com/mars-has-a-surprising-influence-on-earths-climate-scientists-discover
* https://en.wikipedia.org/wiki/Milankovitch_cycles#Present_and_future_conditions
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#Sanidine from the Fish Canyon Tuff is essential to understanding the pace of events in the #Cenozoic
High potassium, quickly erupted and cooled, and old enough to have accumulated sufficient 40Ar from radioactive decay. These crystals calibrate neutron flux for 40Ar/39Ar dating. The 28.2 Ma age of the FCT sanidine has been fine-tuned using #Milankovitch cycles of other ash beds in stable sedimentary basins.
photo from MinDat.org by Dan Polhemus
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#Sanidine from the Fish Canyon Tuff is essential to understanding the pace of events in the #Cenozoic
High potassium, quickly erupted and cooled, and old enough to have accumulated sufficient 40Ar from radioactive decay. These crystals calibrate neutron flux for 40Ar/39Ar dating. The 28.2 Ma age of the FCT sanidine has been fine-tuned using #Milankovitch cycles of other ash beds in stable sedimentary basins.
photo from MinDat.org by Dan Polhemus
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#Sanidine from the Fish Canyon Tuff is essential to understanding the pace of events in the #Cenozoic
High potassium, quickly erupted and cooled, and old enough to have accumulated sufficient 40Ar from radioactive decay. These crystals calibrate neutron flux for 40Ar/39Ar dating. The 28.2 Ma age of the FCT sanidine has been fine-tuned using #Milankovitch cycles of other ash beds in stable sedimentary basins.
photo from MinDat.org by Dan Polhemus
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#Sanidine from the Fish Canyon Tuff is essential to understanding the pace of events in the #Cenozoic
High potassium, quickly erupted and cooled, and old enough to have accumulated sufficient 40Ar from radioactive decay. These crystals calibrate neutron flux for 40Ar/39Ar dating. The 28.2 Ma age of the FCT sanidine has been fine-tuned using #Milankovitch cycles of other ash beds in stable sedimentary basins.
photo from MinDat.org by Dan Polhemus
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#Sanidine from the Fish Canyon Tuff is essential to understanding the pace of events in the #Cenozoic
High potassium, quickly erupted and cooled, and old enough to have accumulated sufficient 40Ar from radioactive decay. These crystals calibrate neutron flux for 40Ar/39Ar dating. The 28.2 Ma age of the FCT sanidine has been fine-tuned using #Milankovitch cycles of other ash beds in stable sedimentary basins.
photo from MinDat.org by Dan Polhemus
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I love the answers by scientists in this @arstechnica piece about #ClimateCycles (ht @andrewdessler ), but it's also a really great introduction to the effects of #Volcanoes #ENSO, #GlacialCycles #milankovitch etc on the climate system...
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Good couple of #blogposts by @kenrice on a recent paper by #JamesHansen et al I'd missed about #ClimateSensitivity.
I tend to agree about the #IceSheet point, it's hard to extrapolate #ECS from #palaeoclimate on #milankovitch timescales because the whole world was *very* different place