Climate Discussion Group 2024, CDG2024
Discussion - Climate C4
October - November 2024
C4 Exo-Earth impact of the Sun, solar wind and sunspots, Milankovitch cycles, cosmic rays,etc
Dec 23, 2024
Gerald Ratzer Canada
CDG2024 Final Technical Report
Climate Discussion Group
Climate change is one of the most debated topics of our time, covering everything from the impact of weather patterns to economic stability and human health. As scientific opinions evolve around the causes and consequences of a warming planet, the urgency for effective policy responses becomes paramount. For policymakers, this means not only understanding the complex interplay of environmental, social, and economic factors but also crafting effective strategies. This is a discussion from invited participants about an understanding of Climate on the technical level.
C4 Exo-Earth planets, Solar wind, Cosmic Rays and Milankovitch Cycles. Terigi Ciccone (22Dec) How the Sun warms the Earth, Part 1 includes a discussion of the Milankovitch
December 31, 2024 1
Dec. 22, 2024
Terigi Ciccone USA
Cycles and the Barycenter of the Solar system.
Dec. 21, 2024
Gerald Ratzer Canada
How the Sun warms the Earth, Part 1 The Importance of the Earth to Sun distance and orientation.
Abstract. Many of us climate scientists and engineers fall victim to what “we know.” Our disciplines and specialties shape our views and focus. However, climate change is a multidisciplinary field where a dozen or more scientific specialties are required to try to grasp the causes of climate and climate change. Sadly, all too often the more we specialize in our fields of comfort, perhaps, the further we get from the truth.
In climate studies, we must accept the fact that dozens of natural forces and cycles dominate the Earth’s climate and climate change. Some act independently and others in complex interactions among and between these forces and cycles. The science of climate and climate change is highly complex and poorly understood. The sun and its orientation to the Earth is one of the major control knobs for the Earth’s ever-changing weather, climate, and climate change. The public poorly understands how the sun warms the Earth, the UN IPCC alarmists say it’s all about human- made CO2, and that science is settled.
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Here is a good summary from AI of what might be in C4. It includes several links.
The Sun, solar winds, cosmic rays, and
December 31, 2024 2
Milankovitch cycles have significant impacts on Earth's environment and climate:
## Solar Effects
The Sun's energy is crucial for life on Earth. Its heat and light make liquid water possible and support almost all living things[1]. The Sun's brightness affects global temperatures, with changes impacting climate over long periods[1].
## Solar Wind
Solar wind, a stream of charged particles from the Sun, travels at an average speed of 190 miles per second near Earth[6]. It interacts with Earth's magnetosphere, causing:
1. Aurora displays near the poles[6]
2. Potential disruptions to satellites, ship communications, and power grids[2]
3. Geomagnetic storms during high-speed events[6]
## Cosmic Rays
Cosmic rays, high-energy particles from space, are influenced by solar activity:
- During solar minimum, more cosmic rays reach Earth's atmosphere[7]
- They contribute to ionization in the atmosphere, potentially affecting cloud formation and regional temperatures[3]
## Milankovitch Cycles
These long-term variations in Earth's orbit and
axis affect climate:
- Eccentricity: 100,000 and 400,000-year cycles
- Obliquity: 41,000-year cycle
- Precession: 19,000 to 23,000-year cycle
These cycles influence the amount of solar radiation reaching Earth, contributing to major climatic changes like ice ages[4].
## Overall Impact
The Sun's energy output, particularly in visible wavelengths, is the most significant factor affecting Earth's climate[5]. The complex interplay of solar activity, cosmic rays, and orbital variations contributes to both short-term weather phenomena and long-term climate patterns.
Citations:
[1]
https://www.amnh.org/explore/ology/earth/aska-scientist-about-our-environment/how-does-thesun-affect-the-environment [2]
https://science.nasa.gov/science-research/planet ary-science/effects-of-the-solar-wind/ [3]
https://pmc.ncbi.nlm.nih.gov/articles/PMC37909 86/ [4]
https://www.swsc-journal.org/articles/swsc/full_ html/2012/01/swsc120022/swsc120022.html
[5] https://www.swpc.noaa.gov/impacts/spaceweather-impacts-climate
[6] https://www.space.com/22215-solarwind.html
[7] https://www.britannica.com/science/cosmicray
[8]
https://www.climate.gov/news-features/understa nding-climate/climate-change-incoming-sunlight [9] https://wmo.int/suns-impact-earth [10] https://news.uchicago.edu/explainer/whatis-solar-wind [11] https://www.earthdata.nasa.gov/topics/sunearth-interactions
I would add the work of Valentina Zharkova on the variation of the TSI and the SMBF (Solar Magnetic Background Field).
Here is her website link https://solargsm.com/
Valentina is also active in the concept of SIM (Solar Inertial Movement) – the barycentre and how all the large planets exert an influence on each other and the Sun. The barycentre is the centre of mass of the Sun and all the planets and moves around the Sun and is often outside the Sun’s sphere because of the alignment of the heavy planets.
On Cosmic Rays I would point you to the work of Svensmark and Nir Shaviv https://www.ias.edu/ideas/2015/shaviv-milkyway and https://www.nature.com/articles/s41598-02199033-1
December 31, 2024