Tracking the next pandemic: Avian Flu Talk |
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carbon20
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Posted: December 18 2016 at 3:45am |
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without the conveyor the northern hemisphere woulsd be under 50ft of snow........
so if it stopped like it did about 11000 years ago, the earth could be punged into an ice age within 10 years...... |
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carbon20
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Ocean Conveyor Belt ImpactClimate Change
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Everything we hear is an opinion, not a fact. Everything we see is a perspective, not the truth.🖖
Marcus Aurelius |
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carbon20
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What is the global ocean conveyor belt?The global ocean conveyor belt is a constantly moving system of deep-ocean circulation driven by temperature and salinity.The ocean is not a still body of water. There is constant motion in the ocean in the form of a global ocean conveyor belt. This motion is caused by a combination of thermohaline currents (thermo = temperature; haline = salinity) in the deep ocean and wind-driven currents on the surface. Cold, salty water is dense and sinks to the bottom of the ocean while warm water is less dense and remains on the surface. The ocean conveyor gets its “start” in the Norwegian Sea, where warm water from the Gulf Stream heats the atmosphere in the cold northern latitudes. This loss of heat to the atmosphere makes the water cooler and denser, causing it to sink to the bottom of the ocean. As more warm water is transported north, the cooler water sinks and moves south to make room for the incoming warm water. This cold bottom water flows south of the equator all the way down to Antarctica. Eventually, the cold bottom waters returm to the surface through mixing and wind-driven upwelling, continuing the conveyor belt that encircles the globe. |
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Dutch Josh
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https://www.washingtonpost.com/news/energy-environment/wp/2016/12/16/warm-ocean-water-is-slamming-into-and-melting-the-biggest-glacier-in-east-antarctica/?utm_term=.4523b2f52424
(Eventhough the washingtonpost has become an elite propaganda medium spreading "fake"news, sometimes they do not lie DJ, 11,5 feet-more than 3 metres, sealevelrise on its way....https://www.youtube.com/watch?v=0isfkb0duN4 BPEarthWatch claiming increase in earthquakes influenced by solar/spaceweather events-that also influences climate. Just like there is volcanic activity on Antarctica-reality may be very complex. I (DJ) try to understand what is happening, makes some sense-but the more I get into these stories the less I understand the full picture.) Scientists at institutions in the United States and Australia on Friday publisheda set of unprecedented ocean observations near the largest glacier of the largest ice sheet in the world: Totten glacier, East Antarctica. And the result was a troubling confirmation of what scientists already feared — Totten is melting from below. The measurements, sampling ocean temperatures in seas over a kilometer (0.62 miles) deep in some places right at the edge of Totten glacier’s floating ice shelf, affirmed that warm ocean water is flowing in towards the glacier at the rate of 220,000 cubic meters per second. These waters, the paper asserts, are causing the ice shelf to lose between 63 and 80 billion tons of its mass to the ocean per year, and to lose about 10 meters (32 feet) of thickness annually, a reduction that has been previously noted based on satellite measurements. This matters because more of East Antarctica flows out towards the sea through the Totten glacier region than for any other glacier in the entirety of the East Antarctic ice sheet. Its entire “catchment,” or the region of ice that slowly flows outward through Totten glacier and its ice shelf, is larger than California. If all of this ice were to end up in the ocean somehow, seas would raise by about 11.5 feet. |
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Satori
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Huge 20 Year Build up of Arctic Fresh Water May Flood North Atlantic & Stall Gulf Stream
http://www.dailykos.com/story/2016/12/13/1610344/-Huge-20-Year-Build-up-of-Arctic-Fresh-Water-May-Flood-North-Atlantic-Stall-Gulf-Stream |
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Satori
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Scientists release Arctic Report Card. If that makes you go 'uh-oh,' you've got it right
http://www.dailykos.com/stories/2016...e-got-it-right |
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Dutch Josh
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Temperature anomaly up to 30C in Arctic http://cci-reanalyzer.org/wxrmaps/#GFS-025deg.ARC-LEA.T2_anom and storms with windspeeds 100km/hr+ http://cci-reanalyzer.org/wxrmaps/#GFS-025deg.ARC-LEA.WS10. The sea-ice in the Arctic does not get much chance to form.
The Ant-Arctic is also warm http://cci-reanalyzer.org/wxrmaps/#GFS-025deg.ANT-LEA.T2_anom and windy http://cci-reanalyzer.org/wxrmaps/#GFS-025deg.ANT-LEA.WS10. But less extreme than the Arctic. The sea-ice will not be able to stop landice sliding into the oceans-giving abrupt sealevelrise, possible tsunamis. Earthquakes in polar regions will make things worse. Methane levels, CO2 levels are rising with record speed. We are getting close to 490 ppm CO2 equivalent-in Earths history that stands for sealevel 40 meters higher, temperatures 4 degrees warmer. And the outlook is that we will cross the 500 ppm (parts per million) level by the end of next year.
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We cannot solve our problems with the same thinking we used when we created them.
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Dutch Josh
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https://www.newscientist.com/article/2114844-mystery-antarctic-circle-means-ice-is-melting-from-surface-down/?utm_source=NSNS&utm_medium=ILC&utm_campaign=webpush&cmpid=ILC%257CNSNS%257C2016-GLOBAL-webpush-MYSTERYICE meltwater-lakes under the East Antarctica ice-shelf in my (DJ) opinion could mean that the quantity and quality of (land)ice in Antarctica and Greenland could be seen much to optimistic-under 4m of ice there is 4m of water-maybe widespread. So there is not 8m of ice to melt, just 4-which could give way to ice behind it sliding towards the ocean.
Much more meltThe researchers discovered similar “hot spots”, or sites of surface melting elsewhere around East Antarctica. Previously, scientists had thought that this degree of surface melting, which leads to instability of the ice sheet, only existed on Greenland or West Antarctica. “We’ve shown that the East Antarctic ice shelves are prone to local surface melting, which is important to take into account when looking at the future response of Antarctica to climate change,” says the other lead author Stef Lhermitte, at Delft University of Technology in the Netherlands. http://ak-wx.blogspot.nl/2016/12/arctic-update.html The NSIDC's latest report provides additional context on November's Arctic weather patterns and the state of sea ice. November's Arctic sea ice extent was the lowest on record for the month, and the monthly ice extent remains more than 3 standard deviations below normal (although not quite as anomalous as during October). |
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jacksdad
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"Buy it cheap. Stack it deep"
"Any community that fails to prepare, with the expectation that the federal government will come to the rescue, will be tragically wrong." Michael Leavitt, HHS Secretary. |
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Dutch Josh
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jacksdad, you are an optimist !
http://arctic-news.blogspot.nl/2016/12/seafloor-methane.html, https://www.theguardian.com/environment/2016/dec/12/rapid-rise-methane-emissions-10-years-surprises-scientists, https://thinkprogress.org/trump-putin-and-exxonmobil-team-up-to-destroy-the-planet-fb88650acfa1#.lzlcsu8w9 Fossil-fuel addiction is a deadly disease-on the short term. I am very lucky to live in a rich country, with a good house, income, healthcare etc. and I want to enjoy all the good days that are still there-limited but still there. The CO2 produced 20 years ago is effecting the atmosphere and climate now-there is a timegap. We can not turn back time to un-release the CO2 from last decades-they will show their effects coming years, months. Unless there is a miracle we will not be around in 2025.
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We cannot solve our problems with the same thinking we used when we created them.
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carbon20
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HAPPY DAYS.....
yes i do wonder what the future holds for my grandchildren........ but people been saying that for ever..... |
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Everything we hear is an opinion, not a fact. Everything we see is a perspective, not the truth.🖖
Marcus Aurelius |
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jacksdad
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I have anything but a rosy view of the future, so this is my kind of thread unfortunately. I had a discussion with someone at work the other day about the world we'll be leaving our kids and grand-kids, and by the time we were done, I think I really depressed her. The lesson here is don't talk about the future with a prepper that believes in climate change, I guess
I suspect that we're past the tipping point, and we can cut back on all the carbon emissions we like because other factors are now in play that are capable of driving climate change regardless - principally methane and water vapor. All we can do is prepare for a very different world, and one which will come along much faster than people think. Short version of my expectations for the future - mid century is when we'll look back on our current problems and get nostalgic. By then, the major growing ares of the world will be seeing a decrease in production due to climate change, just about the time the UN believes the human population will be between nine and eleven billion. To feed that many people will require an estimated 70% more food (at a time of shrinking food production), a seemingly impossible goal given the number of people that go to sleep hungry now. Throw the projected collapse of fish stocks into the mix (which is coincidentally estimated to happen due to over-fishing by 2048), and we are well and truly screwed. Widespread famine in thirty years, as well as a rapidly changing climate. Buckle up, kids. It's going to be a rough ride. |
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"Buy it cheap. Stack it deep"
"Any community that fails to prepare, with the expectation that the federal government will come to the rescue, will be tragically wrong." Michael Leavitt, HHS Secretary. |
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carbon20
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over population is the elephant in the room,
unfortunatly so is all the unequaliy in the world...... and i have traveled to very very very poor countries....... seen the poverty and the masses....... and i am blessed to live where i live ...... |
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Everything we hear is an opinion, not a fact. Everything we see is a perspective, not the truth.🖖
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Dutch Josh
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Carbon20, overpopulation is a big problem and the poor are paying the highest price.
Africa is becoming unliveble. https://robertscribbler.com/2016/12/09/rendered-uninhabitable-by-heat-its-not-just-sudan-parts-from-north-africa-to-the-middle-east-are-under-the-gun/. From the comments-some as good as the article itself; Looking at that map reminded me of this one. “When you map the targets of Western drone strikes onto the region, you see that ‘many of these attacks – from South Waziristan through northern Yemen, Somalia, Mali, Iraq, Gaza and Libya – are directly on or close to the 200 mm aridity line.’ The red dots on the map above represent some of the areas where strikes have been concentrated. To me this is the most striking attempt yet to visualise the brutal landscape of the climate crisis. ” from http://www.lrb.co.uk/v38/n11/naomi-klein/let-them-drown https://www.youtube.com/watch?v=NjOr2YzrZDY The real reason why the west is in Syria. The Jimmy Dore Show-European countries are over their ears in their old colonies. France was the "protector"of Syria after World War 1 (before thet the Ottoman Empire ruled the Arab world). And still wants to play a major role in energy-trade. (From the you-tube-clip; Qatar and Saudi Arabia in 2013 were willing to pay the US for invading Syria. IS is a western/gulfstates creation. DJ-Hitler was also a creation of oil, cars, weapons industry and their (royal) shareholders-the main criminals creating wars and global crises to get even more rich get away with their crimes. (Operation Juliana was a link between the Bush family-the Dutch "royals" and German Thyssen-weaponsproducers-it was all for profit-also in world war 2.)) The 1956 Suez-crises was a UK/France plan to control the Suez canal. The US is a big country and therefor easy to blame. https://en.wikipedia.org/wiki/Population_growth Good statistics on how global population exploded in just a few hundred years. (But it does not mention the role of religion in it.) Global human population growth amounts to around 75 million annually, or 1.1% per year. The global population has grown from 1 billion in 1800 to 7 billion in 2012. It is expected to keep growing, and estimates have put the total population at 8.4 billion by mid-2030, and 9.6 billion by mid-2050. Many nations with rapid population growth have low standards of living, whereas many nations with low rates of population growth have high standards of living. https://source.wustl.edu/2015/12/the-geography-of-antarcticas-underside/">https://source.wustl.edu/2015/12/the-geography-of-antarcticas-underside/ Volcanic activity under West Antarctica. When all the land-ice would disappear most of West Antarctica still would be under the sea. http://www.sciencedirect.com/science/article/pii/S0012821X14005780">http://www.sciencedirect.com/science/article/pii/S0012821X14005780 Volcanic heat will contribute to melt of the West Antarctica Ice Sheet. |
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carbon20
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since 1850 the time of the industrial revollution,the population of this planet has grown by 6 billion people
before 1850,from the year DOT there was no ; CARS,PLANES ,POWERED BOATS , humans are changing this planet like its never been changed before,, we are using CARBON in the form of fossil fules that have been stored for MILLIONS of years , MILLIONS AND MILLIONS OF YEARS..... AND WE BURNING IT ...like there's no tomorrow this Earth is a self contained unit, no one from the outside will come and put on a fan to clean the air...... every major city in the world is suffering from air poullution, the Oceans are been cleaned out of fish, shell fish cant grow hard shells becaues the oceans getting more acid in getting on for 200 years we Humans have decimated the the equal ballance this planet enjoyed for a long long time sorry if your minds a so blinkered that you dont see WE ARE THE PROBLEM BRING ON THE BIRD FLU...... we need CULLING..... |
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Everything we hear is an opinion, not a fact. Everything we see is a perspective, not the truth.🖖
Marcus Aurelius |
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Dutch Josh
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Another "good" report from Robert Scribbler; CO2 levels now close to 410 ppm, when you include methane etc you can get close to 490 ppm. The last time we had such high numbers is 15 million years ago. Temperatures were 4C degrees warmer-sealevel was 130 feet 40 meters higher.
https://www.youtube.com/watch?v=uwCIPRvmgj8 Dutchsinse following seismic events. Waiting for more major quakes. USGS, EMSC a.o. keeping updates. Severe tropical cyclone Vardah moving towards Andra Pradesh-India http://www.skymetweather.com/content/national-video/cyclone-vardah-latest-news-and-update/
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We cannot solve our problems with the same thinking we used when we created them.
~Albert Einstein |
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Dutch Josh
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https://robertscribbler.com/2016/12/07/arctic-air-temperatures-are-set-to-hit-35-to-55-f-above-average-by-thursday-out-of-season-sea-ice-melt-possible-again/ extreme high temperatures in the Arctic. http://cci-reanalyzer.org/wxrmaps/#GFS-025deg.WORLD-CED.T2_anom Also above average temperatures in Antarctica-(it is summer-melting season there, april 2017 should give lowest Antarctic-sea-ice). On increased risks of Greenland land-ice melt http://gizmodo.com/the-greenland-ice-sheet-may-be-far-less-stable-than-we-1789771526
some fitting music: https://www.youtube.com/watch?v=JQt5x1uEAOk A Pious Reflection Paul Mottram https://www.youtube.com/watch?v=Yrba_UJo4Ow Sanctus John Harle
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We cannot solve our problems with the same thinking we used when we created them.
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Crabby
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I wish I still had the temperature graphs going back thousands of years. We had warmer periods in history than we're having now. That in itself doesn't prove or disprove global warming, but it does say that it could still be a hoax. Lots of people are making tons of money off of global warming.
2014 saw record ice, snow, & cold. Over 9,000 PhD scientists signed a petition citing there is no scientific evidence to support the global warming claim. It's also been discovered that some scientists in order to support their global warming claim are taking temperature readings later in the day when it is warmer. You can't play with the data and be credible. When there is such disagreement within the scientific community about global warming I'm wondering why, exactly, you feel it exists one way or the other. I'm going to remain skeptical. |
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Satori
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that Newsmax article is pure crap
that so called info was debunked long ago not gonna waste my time on it and John Casey ? been debunked numerous times and Luongo keeps mentioning 22 billion like its a large sum of money yeah if your from a third world country get real ! and I love the sales pitch at the end who is making more money global warming scientists or those corporation opposing it ? do I really need to answer that ? 22 billion LMAO !!! |
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Crabby
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The temperature increase is supposed to go all the way to Saudi Arabia according to your link above. The earth has been hotter than we are now based on the evidence. We might be temporarily warming up, but in the larger scheme of things we are actually cooler than in the past. Below is a link that you might want to read. I'm leaning towards the idea that global warming is a scam, but since I'm not a scientist I can't say one way or the other. I am skeptical that global warming is actually real. Just in case, though, we've done our part by replacing most incandescent bulbs with LED's or fluorescent because they use less energy. We've also planted trees. http://www.newsmax.com/Finance/MKTNews/Global-Warming-climate-change/2014/11/17/id/607827/ I'm at that point in my life where I believe that selfish behavior rules most this world so it makes sense that people would push this global warming agenda as a means to line their pockets. Wouldn't it make sense that if there really was global warming that the world's scientists could come to some sort of agreement about it? We could argue whether global warming is real all day long, but all we can really do is to act prudently with our energy just in case. Since there is a finite amount of oil on this planet anyway, using less is the right thing to do. Here are things that we can all be doing to combat global warming, just in case it is real. http://globalwarming-facts.info/50-tips/?singlepage=1 |
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Satori
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Where Climate Change Will Bring Extreme Rainfall to the U.S.
http://www.citylab.com/weather/2016/12/climate-change-rain-storm-projections-research-noaa/509675/?utm_source=yahoo&yptr=yahoo Is Sudan doomed to become 'uninhabitable'? https://www.yahoo.com/news/m/a60e88aa-273f-3375-ae52-fa20bca49b31/ss_is-sudan-doomed-to-become.html |
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Dutch Josh
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We cannot solve our problems with the same thinking we used when we created them.
~Albert Einstein |
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Dutch Josh
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https://news.osu.edu/news/2016/11/28/pineisland/ The difference between land-ice and sea-ice in some areas is difficult when ice is on land below sealevel. When seawater reaches there land-ice becomes sea-ice. There are indications that this proces is more widespread than expected-meaning that sealevelrise will go faster than expected.
http://www.nytimes.com/2011/07/26/science/26obearth.html and http://e360.yale.edu/digest/soils_could_release_55_trillion_kilograms_carbon_midcentury/4853/ Both methane and CO2 are going up due to melting permafrost, climate change related causes. Meaning that CO2 reductions by humans will not be enough to stop the proces of global warming. https://robertscribbler.com/2016/12/02/beyond-the-point-of-no-return-imminent-carbon-feedbacks-just-made-the-stakes-for-global-warming-a-hell-of-a-lot-higher/ and http://blog.ucsusa.org/erika-spanger-siegfried/global-warming-in-the-arctic-a-sensitive-climate-gone-off-the-rails and http://www.aces.su.se/study-sheds-new-light-into-the-link-between-thawing-permafrost-and-climate-change/ http://cci-reanalyzer.org/wxrmaps/#GFS-025deg.WORLD-CED.T2_anom New climate reanalyzer-at the poles temperatures are to high meaning ice-loss will give problems in the short term. From M H Hensel on facebook: The West Antarctic sea ice has disintegrated, melted and/or pulled away from much of the West Antarctic shoreline. 11/30/2016 This is exposing the ice sheets and glaciers to the erosion of the ocean waves and warmer water. The second image is for reference of where the Thwaites Glacier is. |
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Satori
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The Arctic Goes Bonkershttp://www.counterpunch.org/2016/11/30/the-arctic-goes-bonkers/ "The Arctic is breaking records left and right!" Nobody really has any idea if and/or when Runaway Global Warming (RGW) will hit civilization like a ton of bricks, but lo and behold scientists do have knowledge of an extreme case in the paleoclimate record: Fifty-five (55) million years ago, global temps increased by 5° C within 13 years; CO2 in the atmosphere was 1,000 ppm and there was no ice on the planet, gulp." and on the political side what do we have to look forward to ? this " Here’s more horrible news from Union of Concerned Scientists: “Myron Ebell—one of the world’s most prominent and vocal climate change deniers—has been tasked with overseeing the [Trump] transition of the nation’s Environmental Protection Agency. The very agency tasked with implementing the nation’s leading plan for curbing global warming pollution—the Clean Power Plan,” (The Union of Concerned Scientists). And, that’s not all, here’s more horrible news: “Steven Groves of the Heritage Foundation was named to lead president-elect Trump’s State Department transition. Groves penned, just last week, an article advocating a speedy withdrawal from the UN Framework Convention on Climate Change, to which we’ve been a party since its ratification in 1992. It’s a move that would scrap our commitments under the landmark Paris Climate Agreement—you know, that thing that stands between us and catastrophic warming,” (The Union of Concerned Scientists)." "leadership on climate change has been weak under Obama,it will go backwards with Trump at least from what we have seen so far |
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Satori
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The Areas America Could Abandon First
https://www.bloomberg.com/view/articles/2016-11-29/the-areas-america-could-abandon-first |
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carbon20
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sealevelriseconfronting climate change |
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Everything we hear is an opinion, not a fact. Everything we see is a perspective, not the truth.🖖
Marcus Aurelius |
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Dutch Josh
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Proberbly it is not a question "if" but "when" and "how". I do not think sealevel will rise spread even-but it will go slow and then a burst of water-when gigantic pieces of ice slide into the ocean-pushing sealevel maybe several centimeters in a very short time ( a tsunami-like wave spreading around the globe in 20 to 30 hours ?).
That piece of land-ice moving into the water will cause an uplift of the underlying landmass-giving more waves, but also seismic waves, earthquakes. Proberbly it also will influence the jet-stream, cause gigantic storms-the airmass following the tsunami-like waves but moving further inland. Another "gloom & doom" proces going on is the melting of permafrost in the mountains. Ice is keeping mountains glued together-when the ice melts, mountains collapse. Landslides, already frequent in many area's will get larger, effect rivers and watersupply. I choose to live on "hopium" and also to enjoy every good day "we"have. I hope I am wrong, that nature can correct itself, science was wrong. An unforseen loop-back that starts re-freezing (some cooling gas from the earths mantle ?). I am not a scientist-may be completely wrong ! Or are we living in dreamland, is our time passed-are we a failed experiment of nature. Is planet Earth getting rid of a "human infection"? |
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jacksdad
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Wait until melting glaciers trigger water wars - India and Pakistan will probably be among the first countries to get serious about that one. Not good considering their history of conflict and animosity. Oh, and the nukes...
http://www.ibtimes.co.uk/are-india-pakistan-brink-water-war-indus-waters-treaty-explained-1584218 |
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"Buy it cheap. Stack it deep"
"Any community that fails to prepare, with the expectation that the federal government will come to the rescue, will be tragically wrong." Michael Leavitt, HHS Secretary. |
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CRS, DrPH
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I hate to say it, folks, but we are screwed. Royally. In the Arctic, there are record high temperatures, and the Arctic sea ice extent continues to be imperiled. Game over.
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CRS, DrPH
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Dutch Josh
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https://www.washingtonpost.com/news/energy-environment/wp/2016/08/17/these-stunning-blue-lakes-just-gave-us-a-new-reason-to-worry-about-antarctica/?utm_term=.ae2be6ff1767
The Washington Post video-link claims that melt would be a process of hundreds of years. Robert Scribler is more realistic; meltwater lakes speed up melting because the meltwater works like a lens. Warm meltwater flows into the ice speeding up the melt from above. Warm sea-water speeds up melt from sea-ice from under the ice. Storms break up (fresh) sea-ice. Methane means temperatures going up further. Earthquakes could break up land-ice-pushing amounts of land-ice into the sea (made easier by layers of meltwater under the ice) hard to imagine. Sealevelrise will not go smoothly, most likely it-for the most-could come in tsunami-like waves. Radioactivity-from nuclear testing, leaking powerplants, storage of nuclear waste getting under water, is effecting the polar regions-increasing melt.
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Satori
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Antarctica's Pine Island Glacier is breaking up from the inside out.
http://www.dailykos.com/stories/2016/11/28/1604949/-Antarctica-s-Pine-Island-Glacier-is-breaking-up-from-the-inside-out according to "the Donald" this is just those mean old Chinese people playing a trick on us "“It’s generally accepted that it’s no longer a question of whether the West Antarctic Ice Sheet will melt, it’s a question of when,” said Ian Howat, associate professor of Earth sciences at Ohio State and lead author of the new study. “This kind of rifting behavior provides another mechanism for rapid retreat of these glaciers, adding to the probability that we may see significant collapse of West Antarctica in our lifetimes.” just at a time when we need real LEADERSHIP on climate change we have it the least |
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carbon20
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Huge glacier retreat triggered in 1940sBy Jonathan AmosBBC Science Correspondent
< method="get" ="http://www.bbc.co.uk/modules/share/page" style="border: 0px; color: inherit; font-style: inherit; font-variant: inherit; font-stretch: inherit; font-family: inherit; font-weight: inherit; letter-spacing: inherit; line-height: inherit; margin: 0px; padding: 0px; vertical-align: line;">Share The melting Antarctic glacier that now contributes more to sea-level rise than any other ice stream on the planet began its big decline in the 1940s. This is when warm ocean water likely first got under Pine Island Glacier (PIG) to loosen the secure footing it had enjoyed up until that point. Researchers figured out the timing by dating the sediments beneath the PIG. It puts the glacier’s current changes in their proper historical context, the scientists tell Nature magazine. These changes can now be regarded as unprecedented in thousands of years. Not only is the glacier going backwards, it is also thinning fast - losing more than 2m in elevation every year. Other field studies and computer models suggest a runaway collapse might even be possible. The PIG on its own could add up to 10mm to sea levels over the next couple of decades. "This glacier used to be pinned to a ridge and once it moved away from that ridge, it started to retreat rapidly; and without other pinning points it could continue to retreat rapidly inland, contributing significantly to global sea level," Dr James Smith from the British Antarctic Survey told BBC News. The PIG is a colossal feature that drains a region of the West Antarctic Ice Sheet some two-thirds the size of the UK. It is a marine-terminating glacier, which means its front flows off the land and pushes out into the ocean along the seafloor until its mass begins to lift up and float. Eventually, the buoyant section breaks up to form icebergs. Currently, the PIG is dumping about 130 billion tonnes of ice in the ocean every year. Submersible surveys under its floating front - its "ice shelf" - had revealed the contact point with the seabed once draped over a large ridge. Having a "grounding line" in such a position would have helped anchor and constrain the whole glacier. Some of the earliest satellite imagery indicated the PIG must have broken free completely of this pinning bump in the 1970s, but when exactly it started to disengage was far less certain. It could have been many decades previously; several centuries or even millennia ago. Now, Dr Smith and colleagues look to have solved this problem. They drilled through the ice shelf to sample, analyse and date the muddy sediments that cover the ridge. And their investigation reveals that warm water is likely to have started to melt a cavity in the grounded glacier behind the pinch point in about the mid-1940s. One of the reasons they can be sure of the timing is because of where plutonium traces start to appear in the sediment layers. This radioisotope is a tell-tale signature for the atomic bomb tests that began in earnest after WWII and which peaked in the 1960s. It leaves open the question of why the unpinning of the PIG occurred when it did, but the team point to the strong warming the region would have experienced following a big El Nino event between 1939 and 1942. El Ninos are associated with the development of particular wind patterns and warm water movements in the Central Pacific, but the impacts affect weather globally. "It's an amazing teleconnection that far-field changes can really have a profound impact on the Antarctic ice sheet," said Dr Smith. Significantly, however, El Nino conditions have waxed and waned over the decades since, but the PIG now continues its relentless retreat. Dr Anna Hogg from Leeds University, UK, monitors Pine Island Glacier on a daily basis using Europe's Cryosat and Sentinel satellites. These spacecraft can measure from orbit the velocity and thickness of the ice stream. She commented: "We know from satellite observations that the PIG has sped up and retreated episodically since the late 1970s, so it’s interesting to see that the sediments beneath the glacier record similar periods of variability dating back to the 1940s. "This erratic past behaviour suggests that we should not expect these colossal glaciers to respond in a steady way in the future, making continuous monitoring increasingly important." Jonathan.Amos-INTERNET@bbc.co.uk and follow me on Twitter: @BBCAmos |
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carbon20
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there is a major challange on the way ,
glacier melt in the Himalayas, BILLIONS of people rely on this for water guess what its running OUT, off shore Methane that is stored frozen underwater is melting at a great rate , this will be a massive game changer... |
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Dutch Josh
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Rising sealevels yet shortage of drinking-water http://www.zerohedge.com/news/2016-11-27/china-escalates-tensions-asias-water-wars
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Dutch Josh
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Good documentry, carbon20 ! Although at the end 3foot of sealevelrise is unrealistic.
Some other remarks on the very complex proces: -wind is a major factor. It blows snow, erodes ice, into the ocean on a much larger scale the previously believed. -Landice has elasticity. Landmass coming up due to less ice on top of if, melt of landice means satelite data may get wrong measurements: the thickness of the icelayer may seem not to have changed much when you only take measurements off the surface, also the qaulity of the landice has changed-less compressed. So in fact satelite data could indicate a smaller loss of (land)ice than there is in reality. -Although the documentary gives some insight, meltwater under the landice (both in Greenland and Antarctica) (as far as I understand DJ) has formed large lakes under the ice-melting the ice from the underside. (Salt water-ice melts by -2 C, with more pressure it could even melt easier). The big risk that what we see with glacier-melt is just small compared by what is underway: landice itself on the move with gigantic pieces sliding into the ocean. (Landmass pushing ice up, seaice not strong enough to stop it). -The polar regions are warming up much faster than global average. Methane also is a big problem. Seawater stores warmth while ice reflects most of the solar energy... All together the outlook is dramatic. Only we do not have enough data to predict/calculate the total effects. With more melt new feed-backs can arise changing the total picture.
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carbon20
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Everything we hear is an opinion, not a fact. Everything we see is a perspective, not the truth.🖖
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Satori
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Donald Trump Still Thinks Climate Change Is ‘A Bunch Of Bunk’http://www.huffingtonpost.com/entry/donald-trump-climate-change_us_583b16e3e4b000af95ee85dd "But the man who claimed numerous times that climate change is “an expensive hoax,” “a concept...created by and for the Chinese” and “bull*****” still believes it is “a bunch of bunk,” according to his incoming chief of staff, Republican National Committee chairman Reince Priebus." we're passing one climate tipping point after another the climate is becoming increasingly chaotic we NEED aggressive,COMPETENT leadership on climate issues NOW every second that goes by is a lost opportunity Trump is gonna be responsible for a LOT of DEATHS in the coming years we desperately need a Churchill ,a Washington,a Lincoln and what do we get? A Drumpf listen closely,the fat lady is just about to sing |
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Satori
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news like this is now happening on an almost daily basis
and still there are people who deny anything is wrong wake up and smell the coffee Hurricane Otto still going as tropical cyclone, into the record books – 2016 was the ‘year-long’ hurricane season http://www.desdemonadespair.net/2016...-tropical.html NASA: The last three Octobers are the warmest Octobers on record http://www.desdemonadespair.net/2016...e-warmest.html Climate models: each 1°C increase in global temperature reduces global wheat production by average of 5.7 percent http://www.desdemonadespair.net/2016...crease-in.html in my neck of the woods,we went through an EXTENDED period this summer where we got 3-5 inches of rain virtually EVERY week,often more than that landscaping that I have had for decades,rotted and now we're in a drought |
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carbon20
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Average Arctic temperature in Svalbard 'could end up above freezing for first time in history' |
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Everything we hear is an opinion, not a fact. Everything we see is a perspective, not the truth.🖖
Marcus Aurelius |
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carbon20
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when the USA was settled there was only
2 billion people on this planet since 1850 the start of the INDUSTRIAL AGE we have added 5 billion people ,billons of cars,airplanes ,powered boats, THAT burn fossil fuels made from the carbon that has been stored for millions of years and is being released all at once BY HUMANS..... those people that refuse to see it are blind...... most people dont even know where the meat on the table comes from , so try explaing to them that "YOUR FUEL " comes from dead plants and animals that died millions of years ago, the population has been DUMBED DOWN , bring on the BIRD FLU....... |
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Everything we hear is an opinion, not a fact. Everything we see is a perspective, not the truth.🖖
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jacksdad
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I think it's a little more involved that that. Rising sea levels, ocean acidification, mass extinctions, unparalleled habitat loss, severe weather events, famine, glacial melting. You know, that kind of thing. |
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"Buy it cheap. Stack it deep"
"Any community that fails to prepare, with the expectation that the federal government will come to the rescue, will be tragically wrong." Michael Leavitt, HHS Secretary. |
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Crabby
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Global Warming is really about the global welfare state and the redistribution of natural resources in the new One World Government.
http://joannenova.com.au/2010/02/the-big-picture-65-million-years-of-temperature-swings/ |
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Crabby
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According to this quack we only have about 10 years left. He isn't a good source on this subject.
"McPherson bills himself as a scientist simply passing along the science (even as he dismisses climate scientists and their work), but he cites nearly as many blog posts and newspaper columns as published studies. When he does cite a study, it’s often clear that he hasn’t taken the time to actually read it, depending instead on a news story about it." "McPherson leans heavily on claims from people associated with the “Arctic News” blog about a catastrophic, runaway release of methane that supposedly is already underway in the Arctic. Unfortunately (or, rather, fortunately), the data don’t match their assertions. The latest IPCC and NAS assessment reports, in fact, deemed such a release “very unlikely” this century. One reason for that is that the Arctic has been this warm or warmer a couple times in the last 200,000 years, yet that methane stayed in the ground." https://fractalplanet.wordpress.com/2014/02/17/how-guy-mcpherson-gets-it-wrong/ |
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Satori
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Humans 'don't have 10 years' left thanks to climate change - scientisthttp://www.newshub.co.nz/world/humans-dont-have-10-years-left-thanks-to-climate-change---scientist-2016112408 |
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Dutch Josh
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http://arctic-news.blogspot.nl/2016/11/sea-ice-is-shrinking.html Both in the Arctic (it is supposed to get winter there !) as in Antarctica (moving to summer) sea-ice is getting to minimum levels for the time of year. Sea-ice keeps land-ice in its place=less sea-ice more land-ice will slide into the ocean.
The movement of landice can go slowly, glaciers once moved just very little per year-but for most glaciers the speed is increasing, some glaciers collapse increasing chances of ice-caused tsunami's. But also lakes of meltwater can break free when ice-dams break/melt. Sealevelrise will increase sharply and sometimes abruptly due to those processes. https://robertscribbler.com/2016/11/22/why-the-global-coral-bleaching-event-that-began-in-2014-may-just-keep-going-and-going/ warmer oceans effect sealive. https://robertscribbler.com/2016/11/18/arctic-storms-sparked-severe-polar-warming-sea-ice-melt-for-november-2016/ More warming=stronger storms=less ice=more warm air/water moving to the poles. https://paulbeckwith.net/2016/11/19/our-climate-change-emergency-three-legged-bar-stool-survival-three-videos/ Things can be done, should be done but "power is money is fossil fuels". So the "shore has to stop the ship" because the captains (politics) fail. Since we are all on this ship we all will pay.
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