"Global Dimming" - A Brand New "Buzzword"?
| 25-04-2022 01:37 | |
IBdaMann ★★★★★(14389) |
Into the Night wrote:sealover wrote:Most people just probably see a control freak. Just HAS to control the conversation. Severe penalties for those who disobey.You are describing yourself as well. He is describing his dreams. Attached image:  |
| 25-04-2022 17:40 | |
Swan ★★★★★(5708) |
Into the Night wrote:Swan wrote:IBdaMann wrote:Swan wrote: Everyone in the room already knows that you do not think. Whaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa |
| 25-04-2022 23:09 | |
Into the Night ★★★★★(21582) |
Swan wrote:Into the Night wrote:Swan wrote:IBdaMann wrote:Swan wrote: Lame inversion fallacy. You are acting like a little child. The Parrot Killer Debunked in my sig. - tmiddles Google keeps track of paranoid talk and i'm not on their list. I've been evaluated and certified. - keepit nuclear powered ships do not require nuclear fuel. - Swan While it is true that fossils do not burn it is also true that fossil fuels burn very well - Swan |
| 26-04-2022 15:37 | |
GretaGroupie ★★☆☆☆(350) |
Into the Night wrote: ITN I never thought of it that way and she does have autism so I hope she thinks for herself.  |
| 26-04-2022 15:44 | |
| GretaGroupie★★☆☆☆ (350) |
Swan wrote: Swan her message may be 0 but her effort is 100 and that is what I admire in her that she makes an amazing effort even with the problems she faces and maybe she is like me in that she does not know enough about climate change to tell what is true and what is not but she is trying and if others are misleading her then one day she will find out as long as she keeps trying. |
| 26-04-2022 17:42 | |
| IBdaMann★★★★★ (14389) |
GretaGroupie wrote:Into the Night wrote: Greta doesn't have autism. She is being marketed as "overcoming adversity" to garner even more attention. Like I said, you are being manipulated. Have you ever seen a magic act? Perhaps you are aware that magicians engage in misdirection, i.e. they direct your attention to what they want you to see and away from what they don't want you to see. The political cabal behind the Greta manipulation fabricate claims of autism and other adversity that you cannot verify ... as a means of getting you to focus more heavily on Greta and to open up with ever growing levels of sympathy. Thus you will more readily accept/embrace the scripts that they write for her and you will be even easier to manipulate. It's all a lie. I would recommend you not fall for it. Greta is not the phony image you have of her. The wonder-story that has given you so much motivation is sheer fabrication, like any movie. It just isn't true; any of it. I hate to be the guy that is splashing you with cold water, and of course, I'm not going to pretend to tell you what to believe. I am simply recommending that you recognize that the magician is creating an illusion for you and that he is actually performing a trick. |
| 27-04-2022 17:16 | |
| GretaGroupie★★☆☆☆ (350) |
IBdaMann wrote: No you are not and I like that you help me see another side of climate change that I never heard. Speaking of magic I had a dream that me and Bible Troll took a space ship in to outer space and we met the tooth fairy and had a party and then seelover was there and did not want to have fun so we put seelover on the moon where he could be with people like him and he was happy and we went to the planet with rings were happy. Does Bible Troll ever go to outer space?  |
| 27-04-2022 19:07 | |
| IBdaMann★★★★★ (14389) |
GretaGroupie wrote:Does Bible Troll ever go to outer space? Yes, but he stays local. The Bible Troll rarely goes beyond the moon. He holds his annual "Sermon on the Mount" on the lunar surface because it's one of the few places he is assured of getting a permit. I don't mind telling you that LGBTQIA+ keep protesting his services and prevent him from getting permits in NYC, LA, Detroit, Chicago, Victoria, Montreal, New Orleans, Toronto, Vancouver and a host of other places. So, the moon it is. . Attached image:  |
| 28-04-2022 15:54 | |
| GretaGroupie★★☆☆☆ (350) |
IBdaMann wrote: Next time I am in one of those cities I will get Bible Troll a permit so he can preach here too. |
| 07-06-2023 02:22 | |
| sealover★★★★☆ (1238) |
[quote]sealover wrote: "Global Dimming" - A Brand New "Buzzword"? No discussion about the science of climate change would be complete without global dimming being incorporated. The data makes no sense without it. Global dimming is NOT a brand new "buzzword". I'm getting pretty old, and I remember it well as a young science student. "Nuclear winter". Past mass extinction events. The written historic record. Crop failures in China pinpoint the year of the big volcanic eruption that ended the Minoan civilization. The sky grew so dark for a year that crops froze in China. By the time people invented thermometers they had more proof. Krakatoa (probably not spelled right), east of Java. When that volcano blew, there were cold-induced crop failures far and wide. And there was temperature data showing that it really got COLDER that year. More recently, temperatures were rising fast at the end of the 80s, early 90s. Then Mt Pinatubo blew its top. It got COLDER that year world wide. Then it went back to rising temperatures. But those 1990s temperatures would have risen even FASTER without the enhanced GLOBAL DIMMING caused by rising emissions from China. Some of global dimming is caused by the sun blocking effect of the anthropogenic emissions themselves. Dark soot. Light absorbing sulfur compounds, etc. But much of global dimming is caused by the effect of anthropogenic aerosols on cloud formation. Aerosol particles provide a nucleus for droplet formation, as water droplets condense and form clouds. In the presence of aerosols, clouds are comprised of much smaller droplets, in much larger numbers, than natural clouds. These clouds are far more reflective, but not so great for providing rain. Global dimming is such an important piece of the puzzle that it needs its own thread for a focused discussion. |
| 07-06-2023 02:23 | |
| sealover★★★★☆ (1238) |
Im a BM wrote: |
| 07-06-2023 02:24 | |
| sealover★★★★☆ (1238) |
[quote]sealover wrote: Global Dimming - The Cosmic Ray Connection What do cosmic rays have to do with global dimming? The answer may surprise you. Natural aerosols have always existed. Aerosols, natural or anthropogenic, have always been able to cause nucleation of cloud droplet formation. Cosmic rays can interact with the aerosols and droplets to enhance formation of many very small droplets in a more highly reflective cloud. Periods of history with more cosmic ray activity have included more global dimming. There was a time when this finding was distorted to claim that cosmic rays, or lack thereof, were responsible for the alleged anthropogenic global warming. |
| 07-06-2023 02:25 | |
| sealover★★★★☆ (1238) |
[quote]sealover wrote: Shifting Geography of Global Dimming There was a time when most of the world's anthropogenic aerosol emissions originated from North America or Europe. The geography of global dimming was a consequence of its point of origin. The north Atlantic, for example. For more than a century, until the late 1970s, aerosol emissions from Europe caused significant dimming over the north Atlantic. When European countries took measures to significantly reduce aerosol emissions, there was significantly less dimming over the north Atlantic. Unprecedented drought in Africa has been attributed to this change. Other places that didn't use to emit so many aerosols are now major emitters. The newest shift in global dimming geography is over the Indian Ocean. India finally got to contribute her fair share of pollution to the atmosphere. At least this will relieve some of the coral bleaching in the Indian Ocean. ------------------------------------------------------------------------ by by [quote]sealover wrote: Global Dimming - The Cosmic Ray Connection What do cosmic rays have to do with global dimming? The answer may surprise you. Natural aerosols have always existed. Aerosols, natural or anthropogenic, have always been able to cause nucleation of cloud droplet formation. Cosmic rays can interact with the aerosols and droplets to enhance formation of many very small droplets in a more highly reflective cloud. Periods of history with more cosmic ray activity have included more global dimming. There was a time when this finding was distorted to claim that cosmic rays, or lack thereof, were responsible for the alleged anthropogenic global warming. |
| 07-06-2023 02:26 | |
| sealover★★★★☆ (1238) |
[quote]sealover wrote: Global Dimming, Albedo, and Evaporative Cooling. Anthropogenic global dimming is a major counterbalance to anthropogenic global warming. Not enough to STOP global warming, but enough to SLOW IT WAY DOWN. Global dimming influences how much of the visible light entering the atmosphere actually reaches the earth's surface. Fun fact - In tropical countries they don't need greenhouses to keep plants warm enough. But you often see black net mesh structures used to provide a little shade for plant nurseries. Blocking just enough sunlight with the black mesh netting improves the growth of the seedlings, compared to direct sunlight, regardless of whether or not it is a "shade tolerant" species or not. The sun wasn't nearly as bright when photosynthesis first evolved as it is today. But what happens to the visible sunlight that does NOT get blocked by global dimming when it reaches the surface? It depends a lot on ALBEDO and EVAPORATIVE COOLING. Albedo is term used to quantify how much visible light is reflected by a surface. Dark surfaces have low albedo. White or light colored surfaces have high albedo. It is no secret that a black tee shirt gets hotter than a white one when you are out in the sun. Human activity has changed the albedo of the earth's surface in many places. Snow and ice used to be the most reflective surfaces on earth. Dark soot from human activity has darkened the ice and snow, causing it to absorb more visible light, transform it into heat, and melt the ice more rapidly. Humans have cleared much of the earth's natural forest cover for agriculture. The albedo of barren soil, especially after drying, is much higher than the albedo of a green leaf. That land now absorbs more visible light to transform into heat. The deforested site now reflects back more visible light. Did that make it COOLER? NO. Just the opposite. It was ten or twenty degrees cooler before they cleared the forest. How does higher albedo result in higher temperature? It doesn't. The difference is evaporative cooling. The leaves of the forest were transpiring a lot of water before the forest was cleared. The dark, low albedo leaves were absorbing the visible light and transforming it into heat. But most of the heat was consumed by the evaporation of water as the leaves transpired it. A standing body of water does the same thing, but not nearly as well. Sunlight hits the water, visible light is transformed into heat, and there is cooling. But that cooling is limited by how much surface area of water contacts the atmosphere. Within the leaves of a tree shading 100 square meters of soil surface, there are orders of magnitude more surface area than 100 square meters of standing water. Much more evaporative cooling from trees than from standing water. What happens to the heat that is removed from the earth's surface by evaporative cooling? That heat is released somewhere else later, when the water vapor condenses back to liquid water. This heat is typically released far from the earths surface, and much of it radiates back out to space. Without evaporative cooling, the surface would be a LOT warmer. As the sun's increasing luminosity caused more and more of the water on Venus to evaporate, warmer water vapor was lost to outer space, little by little. Venus was already steam sauna while there was still water on the surface. Once the last of the water was lost to outer space, there was no more evaporative cooling on Venus. No more clouds of water to block incoming light either. That's when the steam sauna became an oven. |
| 07-06-2023 02:30 | |
| sealover★★★★☆ (1238) |
[quote]sealover wrote: "Global Dimming" - A Brand New "Buzzword"? No discussion about the science of climate change would be complete without global dimming being incorporated. The data makes no sense without it. Global dimming is NOT a brand new "buzzword". I'm getting pretty old, and I remember it well as a young science student. "Nuclear winter". Past mass extinction events. The written historic record. Crop failures in China pinpoint the year of the big volcanic eruption that ended the Minoan civilization. The sky grew so dark for a year that crops froze in China. By the time people invented thermometers they had more proof. Krakatoa (probably not spelled right), east of Java. When that volcano blew, there were cold-induced crop failures far and wide. And there was temperature data showing that it really got COLDER that year. More recently, temperatures were rising fast at the end of the 80s, early 90s. Then Mt Pinatubo blew its top. It got COLDER that year world wide. Then it went back to rising temperatures. But those 1990s temperatures would have risen even FASTER without the enhanced GLOBAL DIMMING caused by rising emissions from China. Some of global dimming is caused by the sun blocking effect of the anthropogenic emissions themselves. Dark soot. Light absorbing sulfur compounds, etc. But much of global dimming is caused by the effect of anthropogenic aerosols on cloud formation. Aerosol particles provide a nucleus for droplet formation, as water droplets condense and form clouds. In the presence of aerosols, clouds are comprised of much smaller droplets, in much larger numbers, than natural clouds. These clouds are far more reflective, but not so great for providing rain. Global dimming is such an important piece of the puzzle that it needs its own thread for a focused discussion |
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