I posted on the subject of global cooling earlier - clearly Zharkova’s message on AGW did not come across to some. I dug further into her website and came across this word document which sets out in absolutely clear terms Z’s views on this subject:
for those without Office Word the file can be read on the free programme Open Office .
Here’s a taste:
"
Solar radiation input to the Earth and the Earth-Sun distance
Summary by V. Zharkova
The temperature on Earth is determined by the radiation input (W/m2) from the Sun, the heat produced within the solid Earth, and the radiation emitted by the Earth. The radiation coming from the Sun may, in first approximation, be approximated by that of a 5800 K black-body; the radiation emitted by the Earth may be approximated by that of a 280 K black-body. Consequently, a large part of the solar radiation input to the Earth falls within the visible range of the spectrum, while the radiation emitted by the Earth falls primarily within the infrared part of the spectrum. As a direct result, the Earth’s atmosphere absorption characteristics for the incoming solar radiation and the outgoing Earth’s radiation are very different.
Various models, based on measurements, exist for the determination of the variation of these heat inputs over time. So, the history of the heat balance of the Earth can be modeled from the past to the future and the history of the resulting Earth’s temperature can be determined. However, it is important to realize that, even today, various aspects of the processes determining the heat balance are not completely understood and the models therefore only have a limited prediction accuracy.
Solar irradiance variations in the past can be determined by measuring the history of biomass radioisotopes (e.g., cosmogenic radioisotopes (14C and 10Be) in paleoclimate records) and by using the historical sunspot number records. By combining this information with actual solar activity measurements obtained during the last decades and physical laws about the processes within the Sun, the variation of the solar activity can be modeled to some extent.
The power density (W/m2) of that radiation is, of course, dependent on the intensity of various processes occurring in the Sun, usually identified by the term ‘solar activity, and the distance of the Earth from the Sun.
…
Modelling climate changes at Earth
For modeling future climate changes, the processes mentioned above must be modeled correctly. Still, one should realize that all these models only have limited accuracy and that some dynamical models exhibit so-called numerical instability, which means that unavoidable small errors in the numerical integration process yield ever-growing prediction errors.
Therefore, the question should be raised: how accurate can we predict climate variations over long periods:
- How could one rely on these models if they do not consider the substantial solar forcing caused by the solar inertial motion?
- Where do these terrestrial temperature models get the heating then?
Can CO2 be a source of heating?
The IPCC supporters declare that this heating is coming from very inert molecules of CO2 whose abundances in the Earth atmosphere have large optical thicknesses of a few hundred. But the large numbers of CO2 molecules make the radiative output of CO2 emission locked within the media with a large optical thickness (many molecules of CO2 on the line of sight), according to the radiative transfer models!
(see the slide below from the talk By C. Veyres, Portugal, 2018):
While the IPCC radiative models dump all their CO2 emission on the Earth by ignoring this optical thickness. Therefore, they obtain such huge and fluctuating numbers of temperature increases because the larger the number of CO2 molecules in their models then the larger is emission reflected to the Earth, which, they suggest, is the force causing its heating. While this CO2 emission will remain locked within the media with large optical thickness while emitting towards the Earth and the interplanetary space only some partial emission from the layers with the optical thickness of unity (!).
To explain this point better I present the Figure and the webpage for details
Computation of Radiative Transfer - Wolfram Demonstrations Project, which demonstrates the intensity of emission from the gray area on the left.
This means the whole hype about the increase of CO2 abundances, which would lead to the increase of the CO2 emission emitted back to the Earth and heat the surface and ocean (greenhouse effect) as IPCC says, has made up out of a very basic unprofessionalism in radiative transfer theory!!
Therefore, the extra heating of the Earth at a medium timescale of two thousand years is happening in much the way that every thousand years the Sun comes closer to planets because of its revolution about the barycentre of the solar system, thus, depositing more energy into the planetary atmospheres and their oceans and the next thousand years the Sun returns to the barycentre that leads to planetary cooling for another thousand plus years. Since all other planets experience similar extra-heating processes as the Earth does in the past three centuries, it confirms that the Sun is the only source of energy for the Earth and all other planets. This medium-term solar heating is modulated by the variations of solar activity on the Sun itself caused by solar dynamo action, e.g., by 11-year cycles and by 350–400-year grand cycles. This is confirmed by the modern grand solar minimum started in 2020 which will last to 2053…
This means the whole hype about the increase of CO2 abundances, which would lead to the increase of the CO2 emission emitted back to the Earth and heat the surface and ocean (greenhouse effect) as IPCC says, has made up out of a very basic unprofessionalism in radiative transfer theory!!
Therefore, the extra heating of the Earth at a medium timescale of two thousand years is happening in much the way that every thousand years the Sun comes closer to planets because of its revolution about the barycentre of the solar system, thus, depositing more energy into the planetary atmospheres and their oceans and the next thousand years the Sun returns to the barycentre that leads to planetary cooling for another thousand plus years. Since all other planets experience similar extra-heating processes as the Earth does in the past three centuries, it confirms that the Sun is the only source of energy for the Earth and all other planets. This medium-term solar heating is modulated by the variations of solar activity on the Sun itself caused by solar dynamo action, e.g., by 11-year cycles and by 350–400-year grand cycles. This is confirmed by the modern grand solar minimum started in 2020 which will last to 2053…"
cheers
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