Poppi Posted January 31, 2017 #176 Share Posted January 31, 2017 Cheers Woo, you have moxy, in a good way. Thanks to MrDoug for his efforts...MrDoug, there was a Nature(?) episode where divers entered some cave (i'd have to look who when where why)...They dove deep and took samples of stalagmites/tights. Analysis of those showed that at one time the cave was above water...there had been several dramatic changes in climate, shown by the several red dust layers in the stalagmites- indicating dust storms from the Sahara. Several changes within a small timescale...Before Man. As well as thousands of meters of ice/ dinosaurs/jungle/current prairie conditions...How has Man figured into global climate conditions? Link to comment Share on other sites More sharing options...
Doug1029 Posted January 31, 2017 #177 Share Posted January 31, 2017 18 hours ago, Poppi said: Cheers Woo, you have moxy, in a good way. Thanks to MrDoug for his efforts...MrDoug, there was a Nature(?) episode where divers entered some cave (i'd have to look who when where why)...They dove deep and took samples of stalagmites/tights. Analysis of those showed that at one time the cave was above water...there had been several dramatic changes in climate, shown by the several red dust layers in the stalagmites- indicating dust storms from the Sahara. Several changes within a small timescale...Before Man. As well as thousands of meters of ice/ dinosaurs/jungle/current prairie conditions...How has Man figured into global climate conditions? If that's the same one I saw, it was in the Yucatan. They were exploring cenotis that provided water to the Mayans. According to the USGS (https://www2.usgs.gov/climate_landuse/glaciers/glaciers_sea_level.asp), during the Last Glacial Maximum sea levels were about 410 feet below modern. As of 3000 years ago (Psusennes I was Pharaoh and the biblical Zoane was being built [actually, re-built]), sea levels reached their more-or-less current level; although, they have jumped up and down some since then (Roman Warm Period, Medieval Warm Period, Little Ice Age, etc. Stalactities could have formed during any low-water episode that lasted long enough. The exact ring pattern on the stalactites allows them to be dated in much the same way tree rings are dated, but without the annual resolution. Man's contributions to climate change may go back as far as 8000 years (Altithermal). But that is debatable. Human activities began to affect the environment with the beginning of the Industrial Revolution, but didn't have significants effects on climate until 1910 when the current temperature excursion began. Doug 2 Link to comment Share on other sites More sharing options...
Poppi Posted February 2, 2017 #178 Share Posted February 2, 2017 Without seeing the show again, from what i recall- there were 4(?)- 8(?) very significant climate changes that came rapidly. Just saw a show on BBC Earth where a scientist was saying that skulls found around the African Rift showed changes due to climate change...could you comment on that?...Makes sense that Man adapts to climate. A part of evolution no doubt. So, the conclusion would be- climate changes with or without Man...So why the carbon tax Link to comment Share on other sites More sharing options...
Doug1029 Posted February 6, 2017 #179 Share Posted February 6, 2017 Maybe there's a reason folks of a scientific bent aren't convincing climate deniers. We have marshaled lots of facts, but nothing happens. Why? Maybe it's because one really can't make claims about how the world should be based on how it is. Reactions like alarmism and blame don't necessarily follow from climate science. The skeptic thinks that if there shouldn't be such a thing as a human cause to warming, then there can't be a human cause and so the science must be wrong. But what if we introduce values? The denier values things like jobs - conversion will create thousands. He values his family, his house, his way of life and it sounds to him like science is threatening those things. I have said before that a starving man will eat the last spotted owl and cut the last redwood to feed his family. What I didn't say was that an unemployed miner will strip mine the last mountain, that people seeing their homes and communities failing will do whatever it takes for short-term relief - blame the Mexicans and Muslims, build pipelines in dangerous places and take serious risks with their own futures. Maybe it's time to take a look at values, like living in a cleaner, safer world where everybody has a place to live and food to eat, where a father doesn't worry about whether his daughters can get health care, or his mother will be refused life-saving care because she has no insurance. We can do all these things and almost all Americans agree they would be good things to do. So why don't we do them? Doug Link to comment Share on other sites More sharing options...
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