So it is important to recognize that natural variations of climate are appreciable and will modulate any future changes induced by man.
* The second IPCC report (1995) states that “data prior to 1400 are too sparse to allow the reliable estimation of global mean temperature” and shows a graph of proxy-derived temperatures for Earth’s Northern Hemisphere from 1400 onward with different details but a similar overall trend to the first report. * The third IPCC report (2001) states that the latest proxy studies indicate “the conventional terms of ‘Little Ice Age’ and ‘Medieval Warm Period’ appear to have limited utility in describing …
There are huge differences between different regions - Alaska has warmed substantially while eastern North America cooled after the 1950s.
Locking onto local records, no matter how beautiful, can lead to serious errors. found that since 1979, Antarctica has been growing colder in the summer and fall seasons but warmer in the winter and spring seasons, except for 50% of East Antarctica, which has also been cooling in the winter. published a story by Andrew Revkin entitled: “Scientists Report Severe Retreat of Arctic Ice.” The last paragraph of the story reads: “Sea ice around Antarctica has seen unusual winter expansions recently, and this week is near a record high.” * In 2000, James J.
Natural processes absorb the equivalent of all natural emissions plus about 57% of man-made emissions, leaving an additional 16 billion metric tons of CO2 in the atmosphere each year. † In permafrost regions, perennial snow accumulations trap air bubbles that leave records of past airborne CO2 concentrations,   and because regional CO2 concentrations vary by less than 10 parts per million over the Earth, these local records are globally representative.  * Instruments located on satellites can measure certain properties of oxygen that vary with temperature.
Data from these instruments is used to calculate the average temperatures of different layers of the Earth’s atmosphere.  * The lowermost layer of the atmosphere, which is called the “lower troposphere,” ranges from ground level to about five miles (8 km) high.  According to satellite data correlated and adjusted by the National Space Science and Technology Center at the University of Alabama Huntsville, the average temperature of the lower troposphere increased by 0.60ºF (0.33ºC) between the 1980s and 2000s, mostly from 1997 to 2010: * Sources of uncertainty in satellite-derived temperatures involve variations in satellite orbits, variations in measuring instruments, and variations in the calculations used to translate raw data into temperatures.  * According to temperature measurements taken near the Earth’s surface that are correlated and adjusted by NASA’s Goddard Institute for Space Studies, the Earth’s average temperature warmed by 1.5ºF (0.8ºC) between the 1880s and 2000s, mostly during 1907–19–2014: * According to temperature measurements taken near the Earth’s surface that are correlated and adjusted by the Climatic Research Unit of the University of East Anglia in the U.
The report states that: some of the global warming since 1850 could be a recovery from the Little Ice Age rather than a direct result of human activities."Belt turnover" is commonly cited as a factor that helps to move your foot backwards and thereby makes running on a treadmill easier than running on the road. If so, wouldn't it be felt on any "moving" surface you walk on, such as a train or plane – or even Earth?as “an increase in the average temperature of the Earth’s atmosphere,” either by “human industry and agriculture” or by natural causes like the Earth has “experienced numerous” times “through its history.” * Some writers use the phrases “global warming” and “climate change” to mean temperature changes strictly caused by human activity.   Other writers use adjectives such as “man-made” and “anthropogenic” to distinguish between human and non-human causes.  (“Anthropogenic” means “of human origin,” and “AGW” stands for “anthropogenic global warming.”) * Just Facts’ Standards of Credibility require the use of “language that is precise and unambiguous.” Hence, when human causes are stated or implied, this research uses terms like “man-made” and “human-induced.” * The greenhouse effect is a warming effect caused by certain gases that retain heat from sunlight. Without such gases, the average surface temperature of the Earth would be below freezing, and as explained by the , “life, as we know it, would not exist.” The global warming debate is centered upon whether added greenhouse gases released by human activity will overheat the Earth and cause harmful effects. * Human activities currently release about 37 billion metric tons of CO2 per year, which equates to about 5% of natural CO2 emissions.Mc Carthy, a Harvard oceanographer and IPCC co-chair, saw a mile-wide stretch of open ocean at the North Pole while serving as a guest lecturer on an Arctic tourist cruise.He informed the * In 2013, “Forecast the Facts”—a “grassroots human rights organization dedicated to ensuring that Americans hear the truth about climate change”—published the following graphic purporting to show a recent photo of the North Pole: * After publishing an article documenting the facts above, Just Facts contacted Forecast the Facts to offer an opportunity to respond. As of January 2016, Forecast the Facts has not replied or issued a correction.  * The natural variability of Earth’s climate is such that a glacier formerly existed on Hawaii, and glaciers once covered almost all of Canada, New England, and the northern central United States: * In addition to carbon dioxide emissions from the use of fossil fuels, other factors that have been implicated by scientists as primary causes of modern climate change include but are not limited to: * A central debate among scientists about man-made greenhouse gases involves how much natural processes reduce or amplify the effects of these gases.