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Q: What do proxy records indicate about global temperature?
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What are proxy indicators of climate change?

Ice Cores Ancient Sediments Tree Rings


Is there miscalculation of global warming?

Yes. I heard scientists are now believing that the Earth is going through a period of cooling, and this should continue for 10 years. But then they said the models they made of global warming SHOULD start being ACCURATE by the time this ENDS. So right now, the models are wrong about global warming, but THEY WILL BE RIGHT AGAIN 10 years from now. :P (the models were always wrong I'm trying to hint at, and will always be)


Is there any proof that global warming is fake?

There is no proof that global warming is not happening. After the recent record global average temperature of 1998, there was a lull, with subsequent years recording lower average temperatures, but this is to be expected as part of normal climate fluctuations. Some optimists nevertheless saw that as proof that global warming had stopped, or even reversed. However, the year 2005 matched the average global temperature of 1998, then 2010 actually exceeded that temperature by a fraction of a degree. There is therefore no proof that global warming is not happening.A:Many people think the the Earth is going through "global warming". Is it fact or just a therory? Well, from what I have learned (from my theacher and his long speaches) that "global warming" is fake. The Earth goes through a cylcle of changing weather. One day it may be cold. Then the next it's hot. The Earth's weather is just like that. Antarctica (the place of the so called "global warming") has been frozen, and frozen very well. In fact it's been frozen forever. The temperature there on about August 20th was at about -10 degrees. That's pretty cold! If you have internet on your Wii go to the weather channel and you can look at the globe to see places weather daily. That's just a little something you can do. In a nut shell, the Earth is not going through "global warming".Also, Antarctica has actually cooled. Dr. Peter Norman and his colleagues have found out that since 1986 Antarctica has been cooling an average of 1.2 degrees Fahrenheit per decade. Also, the earth is coller now than it was 1000 years ago. In which was known as the Medieval Warming Period the temperature was warmer than it was in the 1990s and the Medieval Warming Period was before the industrial revolution and the emission of greenhouse gases.If we are to assume, as we have been instructed to do so, that global warming refers to the main induced portion of the current warming cycle, we have some interesting data.The planet appears to have cooled this past year.Sea level has not increased as predicted and has actually been slower presently than past decades.Sea level has even gone down 6 mm this past year.The bulk of the planets warming happened before 1939. we are only a few tenths of a degree (plus or minus a few tenths) away from the temperatures of 1938The Antarctic has not seen overall ice loss.CO2 has always followed temperature.Despite massive increases in the use of fossil fuels, we saw global cooing from 1939 until 1979. The years 1939, 1998 and 2010 are almost identical, with cooling between those years.IPCC models have not been able to reproduce current warming and cooing trends.The IPCC admits in their policymakers paper that the interaction of water vapor (the predominant greenhouse gas) is still not fully understood.UAH Satellite documentation shows cooling of lower troposphere to 0.09 degrees below the 1981 average for that layer of atmosphere.AnswerWhat do you mean? Global warming exists. It's reality.AnswerEven prior to the current cooling, between 1975 and 1998, when global average annual temperatures were supposedly going up, there is now considerable reason to doubt that they were reallygoing up. See the link below to surfacestations.org. It appears that 87% of the temperature-recording stations in the US alone are located within 30 meters of an artificial heat source, which biases temperatures upward by at least 1oC. By my own calculations, the US's portion of the "official temperature record" has an average bias of slightly more than 3oC. Since the US makes up 9% of the land area on the planet, even if the rest of the world's temperature recording stations are completely unbiased (not likely), the bias in the US alone accounts for 0.27oC, or nearly half of the 0.6oC increase in global average annual temperature observed over the last 40 years. But it is more likely that, at least in Canada, Europe, and China, the observations are subject to some degree of positive bias. It would not surprise me at all if, once all of these biases were quantified, the actualtemperature has not gone up at all over the last 40 years, and may have gone down.In any event, the analysis by surfacestations.org proves that actual temperatures have not gone up nearly as rapidly as the 0.15oC per decade claimed. This is a crucial point because alarmists have finally been forced to admit not only that global warming occurred in the past, in a regular, 1,000-year cycle (the last three episodes are now called the Minoan, Roman, and Medieval Warm Periods), but that the peak temperatures during all three of these past events exceeded the highest temperatures achieved during the "current" warm period. So now they have fallen back on the claim that the "current" warming is unique because of how rapidly temperatures have been rising, continually pointing to that 0.15oC per decade statistic. But that statistic is now proven to be positively biased, and the actual rate of warming, even if the only the US's temperatures are biased, is only about 0.08oC per decade. This puts it below the rate of warming of all three of the previous warm periods. So once again we are left with the unavoidable conclusion that the current warming is not unusual at all. Answer The El Nino of 1997-1998 was the strongest on record, and is one of the major (but not only) reasons for the record heat. The temperature has not been going down since 1998 - it has remained high, and in fact the hottest decade in recorded history followed. But no, none of those years were as hot as 1998. Obviously, since then the SOI has oscillated as it always does and there have been multiple La Ninas and El Ninos since; I'm not sure what one would derive from that in terms of denialist arguments.The record of temperatures is far more robust than volunteer United States stations. The warming has been verified at all levels of the troposphere, in ocean temperatures and in innumerable proxy records. This issue has been addressed.Temperatures declined prior to the 1970's slightly due to the large amount of aerosols that were being pumped into the atmosphere by countries such as the United States; aerosols have a net cooling affect. We are now seeing the same thing in India and China, and this is even evidenced in temperature trends that have leveled off or slightly declined in that region.Furthermore, temperatures now are warmer than they were during the Medieval Warm Period or the prior two (and there is really far too much uncertainty for temperatures going back this far). This statement otherwise was popularized by Ray Evans, who cites a figure taken from a paper (Grootes et al. 1993) which simply is not there, it does not exist. The figure, that is, not the paper.And since the current warming doesn't fall in line with any natural cycle, real or fictitious, where does that leave us? No, it doesn't leave us with the conclusion that the current warming is anthropogenic. That would be lazy and dishonest science. We have come to that conclusion for many, many reasons. We know what the radiative properties of CO2 are from studies done in the 19th century; this is solid. We know how much CO2 and other greenhouse gases we have liberated into the atmosphere since the industrial revolution. We have observed the rise in temperature, accounted for error and uncertainty, and have been doing this since before Al Gore ever noticed it was getting hotter. Climate models can do a remarkably good job of recreating the observed temperature, but they can only do it with an input of anthropogenic greenhouse gases. Without them, they show a slight cooling, which deviates markedly from the trend of the last several decades.Answer The current decade MAY be the hottest on record. All that proves is that we hit the maximum during the current decade. Even after adjusting for El Ninos and other fluctuations, the 5-year average of global average temperatures has definitely turned downward. Is this just a bigger fluctuation? Or is it a sign of things to come? Nobody knows yet.Temperature is what global warming is all about. Proxy data are just estimates of actual temperatures, and there are many sources of error in these estimates. For that matter, as illustrated by Anthony Watts, recorded temperatures are only estimates of actual temperatures, and they are particularly bad estimates in some cases, with confirmed positive bias of over 5 degrees C in some cases. What global warming theory says is that, if global warming is caused by greenhouse gasses, there will be more warming in the upper troposphere than at the surface. The observational data, by satellites, shows exactly the opposite. So, even if the upper troposphere really is warming, it's warming more slowly than the surface. This clearly points to a cause other than greenhouse gasses.AnswerIt does exist. Evidence supporting its existence is extensive. For one, based on geological data and evidence, the Earth is supposed to be in a period of cooling, but instead our temperatures have risen 0.74ºC (from 1906-2006). Our temperatures have only continued to rise, and are projected to rise anywhere between 1.8 to 4.6ºC in the next 100 years. This is an exponential increase, as from the time of the last ice age to now, the Earth's mean surface temperature only increased 3.5ºC.Our rising sea levels indicate global warming, not merely due to melting ice caps, but also because when water warms, the molecules expand.A more accurate term than global warming is global climate change, as not all areas will warm, and climate change will not be uniform.People who say global climate change/warming does not exist do not have concrete scientific facts to dismantle the basic facts: that greenhouse gases are increasing, and are directly correlated with the raise in the temperature in many places of the world.AnswerWe were warming over the last couple of centuries, and the warming now appears to have stopped.I do not dispute that atmospheric carbon dioxide is increasing. Nor do I dispute that temperatures were increasing from around 1975 to around 2000, and that there is, therefore, some degree of correlation between atmospheric CO2 and global average temperature. However, correlation does not prove causation. Take a statistics class and you will learn this. Statistics classes are chock full of examples of two things that are highly correlated but cannot possibly have a causal relationship. For example, some statistician found a high correlation between the stork population in a French city and the human birth rate in the same city. He concluded that storks delivered babies. Of course, he was not serious, but was trying to prove the absurdity of equating correlation and causation.


How do scientists know the co2 level of earth's past atmosphere?

Ice cores contain gases representative of the atmosphere at the time the original snow fell, and thus are used for exploring ancient atmosphere properties. An upper age of about 800 000 years is the limit at present. The ice core also contains dust and radioactive fallout, and these contaminants serve as precise markers in the core. Very old ice does not preserve the annual climate bands that are such an aid to precise dating. CO2 is one of the embedded gases. [The ratio of the various isotopes of oxygen are a proxy for the temperature of the Earth, for the atmospheric mixing is reasonably quick.]


What is the runoff coefficient for crushed stone dust?

Per Technical Report No. 55, depends on your hydrologic soil group. I recommend using "Newly graded areas" as a proxy; it is a similarly perveous surface. The "Gravel" and "Dirt" types include the right-of-way (basically, the grass shoulders in rural areas). Crushed stone is not impervious, so "Paved parking" is not appropriate.HSG A, use 77; HSG B, use 86; HSC C, use 91; HSB D, use 94.- J.A.K, Mass. P.E.

Related questions

Is Mexico in the global North?

No. It is a proxy between the north and south.


How has the temperature changed over the years?

i think that the temperature changing because of us because we destroy environment and such as petrol and coal so this might cause temperature to decrease.-----"Global Warming" is not my area of expertise, but the dramatic cycles into and out of ice ages over the past half-million years or so have, based on ice core measurements as a proxy for temperature, caused the global average temperature to fluctuate by as much 12oC over this period. These fluctuations dwarf the changes observed from "global warming" thus far [whether that remains the case in the decades/centuries to come is another matter].


What is a upstream proxy?

A proxy supplies internet data to your client if configured to do so. An upstream proxy proxy provides the Internet pages to your proxy.


How to Get past Cyber Patrol Filtering?

Use a proxy. Google Proxy. Use a proxy. Google Proxy.


How can you use Proxy in a sentence?

If they could not be present at the meeting, they were allowed vote by proxy. Proxy can be a computing term. Proxy is a hard language. The guy had a good proxy for his bad habit.


What is difference between SIP Outbound Proxy and SIP Proxy?

Proxy SIP - Proxy Server for all outbound requests Outbound Proxy - SIP Outbound Proxy Server where all outbound requests are sent as the first hop.


What is the atmospheric oxygen concentration on earth over the last 100 years as a function of time?

We don't have 100 years of data, but we do have 20 years of data, with data going back much farther through proxy data. We can create a pretty good guess back 100 years because we have records of CO2 since 1957, and better proxy records of CO2, which is strongly tied to oxygen.


What is a caching proxy?

A caching proxy is a proxy which provides temporary storage for results of expensive operations.


How does one view a website using a proxy?

In order to view a website using a proxy, one first has to find a proxy. You can find one of these at Hidemyass. Once you find a proxy, you simply put the url that you want to visit into the proxy and then browse the website using the proxy.


How do you get past proxy server?

Install free proxy software on your PC. Pay for access to a proxy server located on the internet. Set up an encrypted tunnel between the proxy installed on your PC and the proxy on the internet. Set your brower to use the proxy installed on your PC. Done.


How can you play Maplestory on a proxy server?

many proxy servers are blocked and most proxy switching programs do not cover all traffic just HTTP but if you wind a good proxy switcher and a unblucked proxy you can but that is extremely hard to do


How do you connect to a proxy server?

Visit a Proxy Website.