Both of your videos are really informative and tells the story related to correlation between anthropogenic activities and climate change. The following links may help you:

https://www.classzone.com/books/earth.../terc/.../esu501page01.cfm?.

oceanservice.noaa.gov/education/pd/climate/factsheets/howhuman.pdf

Hi Shankhadeep,

Correlation does not necessarily  mean  causation. The story related to anthropogenic activities and  climate change, to quote Professor Richard  Lindzen,  "Given the complexity of climate, no confident prediction about future global mean temperature or its impact can be made."

According to Professor Lindzen: The IPCC acknowledged in its own 2007 report that “The long-term prediction of future climate states is not possible.” 

Professor Lindzen also notes, "Most importantly, the scenario that the burning of fossil fuel leads to catastrophe isn’t part of what either group asserts. So why are so many people worried, indeed, panic stricken about this issue. Here’s where Group Three comes in—the politicians, environmentalists, and media."

Best regards,

Jack

Britain's New PM Just Sacked Its Climate Agency-What Now? | NRDC

https://www.nrdc.org/onearth/britains-new-pm-just-sacked-its-climate-agency-what-now?utm_source=newsletter&utm_medium=linkmain&utm_campaign=email

See if you do not agree that: “‘The change in the global mean surface temperature may just be an artifact of “sampling.”’ And please explain why or why not?  Thanks

Suppose we had error-free thermometers to use to calculate an annual global mean (air) temperature.

If only one error-free thermometer was placed on the globe, say at a pole, an annual average temperature could be calculated. This would be the called the annual mean global surface temperature.  Not much of the globe is covered. 

Whatever the number of thermometers, an average surface temperature is calculated, never mind how much of the globe is not covered by thermometers.   The annual mean global surface temperature is not global.  So what is a change in the annual mean global surface temperature?

If the error-free thermometers are not moved, the difference in the annual mean global surface temperatures would be the change annual mean global surface temperature. Only if the number of thermometers were enough to cover the globe, then a change in annual mean global surface temperatures would be a true difference in annual mean surface temperatures.

Consider a globe with one fixed temperature at the poles and another fixed temperature at the equator.  If a thermometer were placed at a pole one year and at thermometer was placed at the equator second year, there would be change in the annual global mean temperature calculated, though no true change in the globes temperature. 

In the third year suppose a third thermometer was place at the second pole. There would be a difference between the second and third year’s calculated annual global mean surface temperatures by virtue of adding another thermometer, but no true change in the globe’s temperature.  So sampling alone may produce a difference in the annual mean surface air temperatures.

The number of thermometers used to measure the annual global mean surface air temperature has changed..

For example, since 1975 the fraction of the ocean area sampled that contained observations of sea surface air temperature has decreased about 40%.  See:

http://icoads.noaa.gov/index_fig3.html

There have been changes the areas sampled to obtain global mean temperatures.  (For example see

SURFACE AIR TEMPERATURE AND ITS CHANGES OVER THE PAST 150 YEARS, P.D Jones, M. New,• D.E. Parker,S. Martin, and I.G. Rigor  (Plate 1a, page 179, and Plate 1b on page180 )

What part of the annual mean surface air temperature change is not due to sampling error?

Please see the attached file.

https://www.researchgate.net/post/Global_warming_and_climate_change_Hoax_or_reality?view=5b61dd805801f236345af7bb