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UQx Denial101x Making Sense of Climate Science Denial
* This video is unlisted. Be considerate and think twice before sharing.
Published on May 18, 2015
Climate change is real, so why the controversy and debate? Learn to make sense of the science and to respond to climate change denial in Denial101x, a MOOC from UQx and edX.
Denial101x isn’t just a climate MOOC; it’s a MOOC about how people think about climate change.
Any research used to develop this content has been cited on a references page within the subsection for this lecture.
Comments on our channel are turned off. To discuss our videos, enrol at http://edx.org/understanding-climate-... and join us in the edX discussion forum.
https://www.youtube.com/watch?v=H5kejSYPD7U
You must not like your brain very much, depriving it of fresh, valuable nourishment as much as you do.
"How did anyone accurately measure the sun's heat
generation? How did anyone CONTROL THAT EXPERIMENT?"
Talk about mindless.
It seems you are either unwilling to question, or incapable of questioning, your position, even in the face of conclusive evidence.
Sun & climate: moving in opposite directions
What the science says...
The sun's energy has decreased since the 1980s but the Earth keeps warming faster than before.
Climate Myth... It's the sun
"Over the past few hundred years, there has been a steady increase in the numbers of sunspots, at the time when the Earth
has been getting warmer. The data suggests solar activity is influencing the global climate causing the world to get warmer." (BBC)
Over the last 35 years the sun has shown a cooling trend. However global temperatures continue to increase. If the sun's energy is decreasing while the Earth is warming, then the sun can't be the main control of the temperature.
Figure 1 shows the trend in global temperature compared to changes in the amount of solar energy that hits the Earth. The sun's energy fluctuates on a cycle that's about 11 years long. The energy changes by about 0.1% on each cycle. If the Earth's temperature was controlled mainly by the sun, then it should have cooled between 2000 and 2008.
Figure 1: Annual global temperature change (thin light red) with 11 year moving average of temperature (thick dark red). Temperature from NASA GISS. Annual Total Solar Irradiance (thin light blue) with 11 year moving average of TSI (thick dark blue). TSI from 1880 to 1978 from Krivova et al 2007. TSI from 1979 to 2015 from PMOD (see the PMOD index page for data updates).
The solar fluctuations since 1870 have contributed a maximum of 0.1 °C to temperature changes. In recent times the biggest solar fluctuation happened around 1960. But the fastest global warming started in 1980.
Figure 2 shows how much different factors have contributed recent warming. It compares the contributions from the sun, volcanoes, El Niño and greenhouse gases. The sun adds 0.02 to 0.1 °C. Volcanoes cool the Earth by 0.1-0.2 °C. Natural variability (like El Niño) heats or cools by about 0.1-0.2 °C. Greenhouse gases have heated the climate by over 0.8 °C.
Figure 2 Global surface temperature anomalies from 1870 to 2010, and the natural (solar, volcanic, and internal) and anthropogenic factors that influence them. (a) Global surface temperature record (1870–2010) relative to the average global surface temperature for 1961–1990 (black line). A model of global surface temperature change (a: red line) produced using the sum of the impacts on temperature of natural (b, c, d) and anthropogenic factors (e). (b) Estimated temperature response to solar forcing. (c) Estimated temperature response to volcanic eruptions. (d) Estimated temperature variability due to internal variability, here related to the El Niño-Southern Oscillation. (e) Estimated temperature response to anthropogenic forcing, consisting of a warming component from greenhouse gases, and a cooling component from most aerosols. (IPCC AR5, Chap 5)
Some people try to blame the sun for the current rise in temperatures by cherry picking the data. They only show data from periods when sun and climate data track together. They draw a false conclusion by ignoring the last few decades when the data shows the opposite result.
Basic rebuttal written by Larry M, updated by Sarah
Update July 2015:
Here is a related lecture-video from Denial101x - Making Sense of Climate Science Denial
[the video at the top is here in the article]
Last updated on 12 February 2017 by Sarah. View Archives
https://www.skepticalscience.com/solar-activity-sunspots-global-warming.htm
I first gave you the link with this one .. Global Warming & Climate Change Myths
http://investorshub.advfn.com/boards/read_msg.aspx?message_id=129590991
UQx Denial101x Making Sense of Climate Science Denial
* This video is unlisted. Be considerate and think twice before sharing.
Published on May 18, 2015
Climate change is real, so why the controversy and debate? Learn to make sense of the science and to respond to climate change denial in Denial101x, a MOOC from UQx and edX.
Denial101x isn’t just a climate MOOC; it’s a MOOC about how people think about climate change.
Any research used to develop this content has been cited on a references page within the subsection for this lecture.
Comments on our channel are turned off. To discuss our videos, enrol at http://edx.org/understanding-climate-... and join us in the edX discussion forum.
https://www.youtube.com/watch?v=H5kejSYPD7U
You must not like your brain very much, depriving it of fresh, valuable nourishment as much as you do.
"How did anyone accurately measure the sun's heat
generation? How did anyone CONTROL THAT EXPERIMENT?"
Talk about mindless.
It seems you are either unwilling to question, or incapable of questioning, your position, even in the face of conclusive evidence.
Sun & climate: moving in opposite directions
What the science says...
The sun's energy has decreased since the 1980s but the Earth keeps warming faster than before.
Climate Myth... It's the sun
"Over the past few hundred years, there has been a steady increase in the numbers of sunspots, at the time when the Earth
has been getting warmer. The data suggests solar activity is influencing the global climate causing the world to get warmer." (BBC)
Over the last 35 years the sun has shown a cooling trend. However global temperatures continue to increase. If the sun's energy is decreasing while the Earth is warming, then the sun can't be the main control of the temperature.
Figure 1 shows the trend in global temperature compared to changes in the amount of solar energy that hits the Earth. The sun's energy fluctuates on a cycle that's about 11 years long. The energy changes by about 0.1% on each cycle. If the Earth's temperature was controlled mainly by the sun, then it should have cooled between 2000 and 2008.
Figure 1: Annual global temperature change (thin light red) with 11 year moving average of temperature (thick dark red). Temperature from NASA GISS. Annual Total Solar Irradiance (thin light blue) with 11 year moving average of TSI (thick dark blue). TSI from 1880 to 1978 from Krivova et al 2007. TSI from 1979 to 2015 from PMOD (see the PMOD index page for data updates).
The solar fluctuations since 1870 have contributed a maximum of 0.1 °C to temperature changes. In recent times the biggest solar fluctuation happened around 1960. But the fastest global warming started in 1980.
Figure 2 shows how much different factors have contributed recent warming. It compares the contributions from the sun, volcanoes, El Niño and greenhouse gases. The sun adds 0.02 to 0.1 °C. Volcanoes cool the Earth by 0.1-0.2 °C. Natural variability (like El Niño) heats or cools by about 0.1-0.2 °C. Greenhouse gases have heated the climate by over 0.8 °C.
Figure 2 Global surface temperature anomalies from 1870 to 2010, and the natural (solar, volcanic, and internal) and anthropogenic factors that influence them. (a) Global surface temperature record (1870–2010) relative to the average global surface temperature for 1961–1990 (black line). A model of global surface temperature change (a: red line) produced using the sum of the impacts on temperature of natural (b, c, d) and anthropogenic factors (e). (b) Estimated temperature response to solar forcing. (c) Estimated temperature response to volcanic eruptions. (d) Estimated temperature variability due to internal variability, here related to the El Niño-Southern Oscillation. (e) Estimated temperature response to anthropogenic forcing, consisting of a warming component from greenhouse gases, and a cooling component from most aerosols. (IPCC AR5, Chap 5)
Some people try to blame the sun for the current rise in temperatures by cherry picking the data. They only show data from periods when sun and climate data track together. They draw a false conclusion by ignoring the last few decades when the data shows the opposite result.
Basic rebuttal written by Larry M, updated by Sarah
Update July 2015:
Here is a related lecture-video from Denial101x - Making Sense of Climate Science Denial
[the video at the top is here in the article]
Last updated on 12 February 2017 by Sarah. View Archives
https://www.skepticalscience.com/solar-activity-sunspots-global-warming.htm
I first gave you the link with this one .. Global Warming & Climate Change Myths
http://investorshub.advfn.com/boards/read_msg.aspx?message_id=129590991
It was Plato who said, “He, O men, is the wisest, who like Socrates, knows that his wisdom is in truth worth nothing”
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