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Pity. There is no data relating to any specific tests or experiments.
Ben,I am old man. ..
I am sorry you feel that way of me. I have resigned from the forum.
Yes, my idea was that if CO2 acts as a blanket, it might also act as a shield.
Yes, my idea was that if CO2 acts as a blanket, it might also act as a shield. But let me rather stay out of this discussion, because what O says is true. I am not qualified in this field and don't have the same access to information like you people do.
the warming effect CO2> cooling effect caused by CO2).
You're welcome.And in response to your question, noone blames CO2 for ALL the GCC (please stop calling it GW - it isn't). CO2 is PART of it, and is perhaps the most easily addressed. It is well established that CO2 is a GHG, yes? Increased GHGs increases retained energy, yes? CO2 has increased by 25% in the last few decades, yes? I'm not sure I see what the problem is. Yes, there are other influences on GCC, but (to use that awful phrase) CO2 provides the low-hanging fruit, and it is predicted through extensive modelling, that GCC in response to CO2 increases, is not linear due to feedback processes. By the time that it has reached 750 ppm, there is a roughly 50% likelihood of an increase in temperature of 6 or 7°C, which will have profound effects on the net carbon storage of forests, for example. They will no longer be sinks, but sources due to reductions in photosynthesis, reduced productivity and increased mortality. And if the forests go, not to put too fine a point on it, you're buggered. Completely. Because of CO2.
we blame the carbon emissions which results in the green house gas for global warmimg, without offering any physical evidence or proof. hence i dont really know that carbon dioxide is causing global warming!
My investigations have turned me into a total skeptic. I very much doubt whether carbon dioxide is to blame for global warming. It is not that I deny that global warming is happening. Read my final report on the other thread: How much is the increase in carbon dioxide every year?
Get a grip on your chicken-little roost already. Geeze. Warm is good, cold is bad
Get a grip on your chicken-little roost already. Geeze. Warm is good, cold is bad, and right now it looks possible we might need baby harp seal sweaters shortly. The weather is like the stock market. It varies. Right now it is getting cooler.
I'm afraid it's not that simple. With a warmer climate, sure, some places will become more fertile. Other areas however, will become deserts.
There's another aspect that people seem to ignore while saying "it will be better if things are warmer".Change isn't good.Farmers like to know what the weeather will be like and the currebnt state of affairs is that we are having weird weather.There is no question that CO2 levels have risen.Since most of the CO2 is made from "ancient" C sources it's fair to blame the use of fossil fuels. (You can, in effect, radiocarbon date the CO2).
There's no question that CO2 absorbs IR radiation.There's no way that you can avoid that leading to a greenhouse effect.There is, thereefore, at least some anthropogenic global warming and the weather is going nuts.If we want to eat we need stable weather.Perhaps we should try cutting back onCO2.
if you really want an example of cold is bad, get a load of this URL where collapse of Old Kingdom Egypt through draught famine is directly associated with sudden cooling that last one or two hundred years planet wide.
See ...sorry, you cannot view external links. To see them, please
REGISTER or LOGIN as an example:"evidence has mounted that unusual shifts in atmospheric patterns took place near the end of the Classic Maya period, lending credence to the notion that climate, and specifically drought, indeed played a hand in the decline of this ancient civilization."Note, this drought caused by increased global temperature.Have you got it now?
Your analysis that the fall of the Maya occurred during a warming period is absolutely incorrect, though.
Note, this drought caused by increased global temperature.
yor and bored - regarding sunspots, I refer you to the Maunder Minimum....sorry, you cannot view external links. To see them, please
REGISTER or LOGIN )Advantages:Agriculture * Bumper crops in high latitude countries like Greenland, Canada * Higher rice yields in Northern ChinaHealth * Fewer deaths from cold exposure * Record profits for pharmaceutical companiesArctic Melt * Shippers get an Arctic shortcut between Atlantic and Pacific * Access to North Pole oil (hmm, good or bad?) * Thriving mammoth tradeEnvironment * Greener rainforests due to higher sunlight levels due to fewer rain clouds * Animals in Greenland can graze longer * Save grey nurse sharks from extinctionGlacier Melt * Access to more mining areas as Greenland's glaciers recede * New extreme sport of glacier surfing (riding waves when chunks of glaciers fall into the sea) * Longer grazing for sheep in GreenlandEconomical * Increased summer movie box office * Lots of work and money for lawyers (not sure which column to put this one in)Disadvantages:Agriculture * China's grain harvest will be cut by 5 to 10% by 2030 * Africa's food production will be halved by 2020. * Decelerating tropical forest growth * Increased conflict over resources * Dislocate millions (with subsequent economical and military ramifications) - an estimated 50 million by 2010 * Coral reefs are dissolving due to CO2 turning seawater acidic and bleaching due to warmer waters * Increase of wildfire activity * Water shortages in the Mediterranean, flash floods along the Rhine and summers so hot that nuclear power stations can't cool down, more than half of Europe's plant species could risk extinction by 2080 according to EU paper * Increased range and severity of crop disease * Encroachment of shrubs into grasslands, rendering rangeland unsuitable for domestic livestock grazing * Diminishing fresh water supplies for coastal communities * Decreased water supply in the Colorado River Basin (McCabe 2007) * Decreasing water supply to the Murray-Darling Basin (Cai 2008) * Decreasing human water supplies, increased fire frequency, ecosystem change and expanded deserts (Solomon 2009)Health * Increased deaths to heatwaves (5.74% increase to heatwaves compared to 1.59% to cold snaps) * Increases in malnutrition and consequent disorders, with implications for child growth and development. * Increased deaths, disease and injury due to heat waves, floods, storms, fires and droughts. * Spread of malaria into wider regions * Increased frequency of cardio-respiratory diseases due to higher concentrations of ground level ozone related to climate change. * Spread of mosquito vectors and dengue fever in Singapore. * Spread of dengue fever throughout the Americas. * Increased pollen levels (due to more CO2) leading to increased allergies * Increased spread of flesh eating disease * More heart problemsArctic Melt * Decrease in Arctic albedo, further accelerating warming * Loss of 2/3 of the world's polar bear population within 50 years * Positive methane feedbacks from mammoth dung (you can't make this stuff up) * Melting of Arctic lakes leading to positive feedback from methane bubbling. * Icebergs risk to shipping * Rising sea levels due to melting land ice over Greenland and CanadaEnvironment * Rainforests releasing CO2 as regions become drier (from the 'greener rainforests' study) * Encroaching deserts displacing tens of millions * Drying of arctic ponds with subsequent damage to ecosystem * Vanishing lakes * Tibetan plateau warming at twice the global average, so that all the glaciers in the central and eastern Himalayas could disappear by 2035 at their present rate of decline * Skinny whales (I always thought they stood to lose some weight) * Acidification of the ocean that violate EPA standards for ocean quality, threatening ocean ecosystems (eg - harming coral and plankton) * Threatened extinction of British shellfish * Gradual extinction of leeches (someone's gotta love em) * Dwindling penguin numbers * Disappearance of the low-lying island country Tuvalu * Disruption to New Zealand aquatic species * Oxygen poor ocean zones are growing (Stramma 2008, Shaffer 2009) * Increased mortality rates of healthy trees in Western U.S. forest (more...) * More severe and extensive vegetation die-off due to warmer droughts (Breshears 2009)Glacier Melt * Flooding of low lying Asian rice fields * Water supply cut off for China and South AmericaEconomical * Billions of dollars of damage to public infrastructure * Reduced water supply in New MexicoSo either you really really like Grey Nurse sharks, or you haven't really weighed up the pros and cons.
However unlikely and difficult to predict, imagine for the sake of argument that the sun does go through another Maunder Minimum over the next century. What effect would this have on Earth's climate? The difference in solar radiative forcing between Maunder Minimum levels and current solar activity is estimated between 0.17 W/m2 (Wang 2005) to 0.23 W/m2 (Krivova 2007).In contrast, the radiative forcing of CO2 since pre-industrial times is 1.66 W/m2 (IPCC AR4), far outstripping solar influence. And that's not including the extra CO2 to be added to the atmosphere in upcoming decades. In other words, the warming from CO2 dwarves any potential cooling even if the sun was to return to Maunder Minimum levels.
Madi - You wrote: "In contrast, the radiative forcing of CO2 since pre-industrial times is 1.66 W/m2 (IPCC AR4), far outstripping solar influence."If so, you need to account for all the climate change that has taken place prior to industrialization. Specifically, atmospheric CO2 is at a near low in all of planetary history right now. Yet we are in something of a climate optimum. I notice you cite the IPCC. This has about the same scientific content as your reference to Lord Attenbourogh and his breathless, yet supine, video clip cited earlier. Cue dramatic music, cue single, unchallenged climatologist, cue clueless Shakspearean Actor. Perhaps add forelorn Polar Bear on small iceberge.Pathetic....
Global Highlights – August * The worldwide ocean surface temperature of 62.4 degrees F was the warmest on record for any August, and 1.03 degrees F above the 20th century average of 61.4 degrees F. * Separately, the global land surface temperature of 58.2 degrees F was 1.33 degrees F above the 20th century average of 56.9 degrees F, and ranked as the fourth warmest August on record. * Large portions of the world’s land mass observed warmer-than-average temperatures in August. The warmest departures occurred across Australia, Europe, parts of the Middle East, northwestern Africa, and southern South America. Both Australia and New Zealand had their warmest August since their records began. * The Southern Hemisphere average temperatures for land and ocean surface combined were the warmest on record for August.
I guess it's a matter of deffinition but I think muddling up the two Attenboroughs is pathetic....sorry, you cannot view external links. To see them, please
REGISTER or LOGINIf you can't tell the difference between a film producer/ actor and a anturalist then perhaps your other postings should be brought into question.Also I note thet you chose to belittle the IPCC as unscientific.I presume that your definition of unscientific is anything that doesn't agree with you.
completely disregarding someones opinion and belittling them because they made a mistake between David/Richard Attenborough (or even between 250 ml/mm for that matter) is the equivalent of deeming your posts invalid because you cant seem to spell the words deffinition (definition), thet (that), or anturalist (naturalist). *Everyone* makes mistakes.
I guess it's a matter of deffinition but I think muddling up the two Attenboroughs is pathetic.
How inapropriate for a science site- I prefer the facts to be correct.